Patent Application
20200010688
Certain embodiments are directed to an oleophobic surface coating and a wipe/applicator comprising a plurality of materials that can be used to provide the oleophobic surface coating on a surface.
Surfaces are often subjected to materials that can leave residue on the surfaces. The residue can be difficult to remove and often requires the use of abrasive materials to remove it. In many cases, not all residue can be removed even when using abrasive materials.
Certain aspects, configurations, embodiments and examples are described of wipes, applicators and coatings. For example, wipes and applicators can be used to provide an oleophobic surface coating that provides easy-to-clean performance in a cleanability test for a desired number of cycles and does not off gas any halogenated compounds when the surface comprising the oleophobic surface coating is heated to a temperature of 350 degree Celsius. The exact number of cycles where the surface coating may provide the easy-to-clean performance may vary and is typically at least one cycle or at least five cycles or more, e.g., easy-to-clean performance can be provided for one and less than ten cycles before the coating material needs to be re-applied. If desired, reapplication of the coating materials to the surface can be performed to restore the surface coating properties.
In an aspect, a wipe comprising a carrier material and a coating material retained by the carrier material is described. In some configurations, the carrier material can transfer at least some of the coating material from the carrier material to a contacted surface, wherein the coating material provides an oleophobic surface coating on the contacted surface, and wherein the oleophobic surface coating provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In some examples, the carrier material comprises a woven or nonwoven web material. In other examples, the carrier material comprises a blend of natural pulp and/or man-made fibers. In some embodiments, the pulp component of the wipe comprises natural cellulosic fibers, cotton, wood fibers, softwood paper making pulp, hardwood pulp and non-wood pulp. In some examples, the nonwoven web material comprises wood pulp and man-made fibers. In other examples, the nonwoven web material comprises man-made fibers and wherein the man-made fibers comprise cellulosic fibers, cellulose acetate, polyester, nylon and polypropylene fibers. In some embodiments, the coating material comprises an organofunctional silane system.
In other embodiments, the coating material comprises one or more of parylene, an organofunctional silane, a fluorinated organofunctional silane, fluorinated organofunctional siloxane, organo-functional oligomeric siloxane, organofunctional resins, hybrid inorganic organofunctional resins, low-surface-energy resins, organofunctional polyhedral oligomeric silsesquioxane (POSS), hybrid inorganic organofunctional POSS resins, fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, hybrid inorganic organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, fluorinated polyhedral oligomeric silsesquioxane (FPOSS), non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, fluorinated alkylsiloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, surface-modified inorganic particles, fluorinated alkylsilane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, polydimethylsiloxane, fluorinated organo-functional oligomeric siloxane, polymer blends, aqueous preparation of an organofunctional silane system, organofunctional polysiloxane, silane based sol-gel system, fluoroalkysilane, hydrolyzable inorganic ethoxysilyl groups, sol-gel systems, silane system, functionalized silanol groups, other similar groups, aqueous, and alcohol-free products of epoxysilanes.
In certain configurations, the coating material comprises a material comprising carbon, fluorine, and silicon to provide the oleophobic surface coating that is a crosslinked mesh on the surface.
In some examples, the coating material comprise sat least particle comprising silica (SiO2) particles, platinum oxide (Pt2O), alumina particles (Al2O3), silicon carbide (SiC), single wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs), diatomaceous earth (DE), boron nitride (BN), titanium oxide (TiO2), mixture of titanium/silica oxide (TiO2/SiO2, titanium inner core/silicon outer surface), ceramic particles, thermo-chromic metal oxides, diamond, particles formed by differential etching of spinodal decomposed glass, molybdenum disulfide (MoS2), boron nitride (BN), sulfides, selenides and tellurides (chalcogenides) of molybdenum, tungsten, niobium, tantalum, and titanium (eg. WS2, WSe2, MoSe2, TaSe2, TiTe2), monochalcenides (GaS, GaSe, SnSe), chlorides of cadmium, cobalt, lead, cerium, zirconium (eg. CdCl2, CoCl2, PbCl2, CeF3, PbI2), borates (eg. Na2B4O7) sulfates (eg. Ag2SO4), black carbon, carbon black, engineered carbon-based nanomaterials, e.g., carbon nanotubes, fullerenes, graphene and any combination thereof. In some instances, the particles are functionalized with a compound comprising one or more of organofunctional silane, parylene, fluorinated alkylsilane, fluorinated alkylsiloxane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, polydimethylsiloxane, organofunctional silicone polymers, organofunctional silicone copolymers, fluorinated organofunctional silicone copolymers, organo-functional oligomeric siloxane, fluorinated organo-functional oligomeric siloxane, organofunctional polyhedral oligomeric silsesquioxane (POSS), fluorinated polyhedral oligomeric silsesquioxane (FPOSS), fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, and organofunctional silane systems.
In some examples, the coating material comprises a surfactant comprising alkylated and heavily alkylated quaternary ammonium salts, perfluorinated organo functional quaternary ammonium salts, Cetylpyridinium chloride, Lauryl methyl gluceth-10 hydroxypropyl dimonium chloride, Domiphen bromide, Benzododecinium bromide, Octenidine dihydrochloride, Fluoro-surfactant products, Sulfonates, Sulfates, Carboxylates for example Sodium stearate, Sodium lauroyl sarcosinate, Carboxylate-based fluorosurfactants such as Perfluorononanoate, Perfluorooctanoate (PFOA or PFO), Sodium alkylbenzene sulfonates, Sodium stearate, Potassium alcohol sulfates, Alcohol ethoxylates, Nonylphenoxy polyethylenoxy alcohols, Ethylene oxide/propylene oxide block copolymers, Fatty alcohol ethoxylates for example Narrow-range ethoxylate, Octaethylene glycol monododecyl ether, and Pentaethylene glycol monododecyl ether, Alkylphenol ethoxylates (APEs) for example Nonoxynols and Triton X-100, Special ethoxylated fatty esters and oils, Ethoxylated amines and/or fatty acid amides for example Polyethoxylated tallow amine, Cocamide monoethanolamine, and Cocamide diethanolamine, Terminally blocked ethoxylates for example Poloxamers, Fatty acid esters of polyhydroxy compounds, Fatty acid esters of glycerol for example Glycerol monostearate and Glycerol monolaurate, Fatty acid esters of sorbitol for example Sorbitan monolaurate, Sorbitan monostearate, and Sorbitan tristearate, Fatty acid esters of sucrose, Alkyl polyglucosides for example Decyl glucoside, Lauryl glucoside, and Octyl glucoside, Amine oxides for example Lauryldimethylamine oxide, Sulfoxides for example Dimethyl sulfoxide, Phosphine oxides for example Phosphine oxide, Sulfate, sulfonate, and phosphate esters; alkyl sulfates for example Ammonium lauryl sulfate and Sodium lauryl sulfate (sodium dodecyl sulfate, SLS, or SDS), Alkyl-ether sulfates for example sodium laureth sulfate (sodium lauryl ether sulfate or SLES), and sodium myreth sulfate, Docusate (dioctyl sodium sulfosuccinate), Perfluorooctanesulfonate (PFOS), Perfluorobutanesulfonate, Alkyl-aryl ether phosphates, Alkyl ether phosphates, pH-dependent primary, secondary, or tertiary amines; primary and secondary amines for example Octenidine dihydrochloride, Permanently charged quaternary ammonium salts for example Cetrimonium bromide (CTAB or Cetyltrimethyl ammonium bromide), Cetylpyridinium chloride (CPC), benzalkonium chloride (BAC), benzethonium chloride (BZT), dimethyldioctadecylammonium chloride, and dioctadecyldimethylammonium bromide (DODAB), and combinations thereof.
In other examples, the wipe can be coupled to a second wipe, e.g., in a roll or other manner. For example, the second wipe may comprise a second carrier material and a second coating material retained by the second carrier material, wherein the second carrier material can transfer at least some of the second coating material from the second carrier material to a contacted surface, wherein the second coating material provides a second oleophobic surface coating on the contacted surface, and wherein the second oleophobic surface coating provides easy-to-clean performance in a cleanability test and does not off-gas any hazardous compounds when the second oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In some instances, the coating material and the second coating material comprise different materials. In other instances, the coating material and the second coating material comprise same the materials. In some embodiments, the first wipe is coupled to the second wipe through perforations.
In other embodiments, the wipe may comprise a third wipe coupled to the second wipe. For example, the third wipe comprises a third carrier material and a third coating material retained by the third carrier material, wherein the third carrier material can transfer at least some of the third coating material from the third carrier material to a contacted surface, wherein the third coating material provides a third oleophobic surface coating on the contacted surface, and wherein the third oleophobic surface coating provides easy-to-clean performance in a cleanability test and does not off-gas any hazardous compounds when the third oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In other examples, the wipe may comprise a colorant in the carrier material.
In some embodiments, the carrier material comprises a non-woven or woven web material, and the coating material comprises an organofunctional silane system. In other embodiments, the carrier material comprises a non-woven or woven web material, and the coating material comprises an epoxysilane.
In another aspect, an oleophobic surface coating comprises a heat cured coating material, wherein the oleophobic surface coating provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off gas any halogenated compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In some examples, the heat cured coating material comprises, or is produced using, one or more of parylene, an organofunctional silane, a fluorinated organofunctional silane, fluorinated organofunctional siloxane, organo-functional oligomeric siloxane, organofunctional resins, hybrid inorganic organofunctional resins, low-surface-energy resins, organofunctional polyhedral oligomeric silsesquioxane (POSS), hybrid inorganic organofunctional POSS resins, fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, hybrid inorganic organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, fluorinated polyhedral oligomeric silsesquioxane (FPOSS), non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, fluorinated alkylsiloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, surface-modified inorganic particles, fluorinated alkylsilane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, polydimethylsiloxane, fluorinated organo-functional oligomeric siloxane, polymer blends, aqueous preparation of an organofunctional silane system, organofunctional polysiloxane, silane based sol-gel system, fluoroalkysilane, hydrolyzable inorganic ethoxysilyl groups, sol-gel systems, silane system, functionalized silanol groups, other similar groups, aqueous, alcohol-free products of epoxysilanes, or any combination thereof.
In other examples, the heat cured coating material comprises, or is produced using, a material comprising carbon, fluorine, and silicon to provide an oleophobic surface coating that is a crosslinked mesh on the surface.
In some embodiments, the heat cured coating material comprises, or is produced using, at least particle comprising silica (SiO2) particles, platinum oxide (Pt2O), alumina particles (Al2O3), silicon carbide (SiC), single wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs), diatomaceous earth (DE), boron nitride (BN), titanium oxide (TiO2), mixture of titanium/silica oxide (TiO2/SiO2, titanium inner core/silicon outer surface), ceramic particles, thermo-chromic metal oxides, diamond, particles formed by differential etching of spinodal decomposed glass, molybdenum disulfide (MoS2), boron nitride (BN), sulfides, selenides and tellurides (chalcogenides) of molybdenum, tungsten, niobium, tantalum, and titanium (eg. WS2, WSe2, MoSe2, TaSe2, TiTe2), monochalcenides (GaS, GaSe, SnSe), chlorides of cadmium, cobalt, lead, cerium, zirconium (eg. CdCl2, CoCl2, PbCl2, CeF3, PbI2), borates (eg. Na2B4O7) sulfates (eg. Ag2SO4), black carbon, carbon black, engineered carbon-based nanomaterials, e.g., carbon nanotubes, fullerenes, and graphene. In some examples, the particles can be functionalized with a compound comprising one or more of an organofunctional silane, parylene, fluorinated alkylsilane, fluorinated alkylsiloxane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, polydimethylsiloxane, organofunctional silicone polymers, organofunctional silicone copolymers, fluorinated organofunctional silicone copolymers, organo-functional oligomeric siloxane, fluorinated organo-functional oligomeric siloxane, organofunctional polyhedral oligomeric silsesquioxane (POSS), fluorinated polyhedral oligomeric silsesquioxane (FPOSS), fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, and organofunctional silane systems.
In other embodiments, the heat cured coating material comprises, or is produced using, a surfactant comprising alkylated and heavily alkylated quaternary ammonium salts, perfluorinated organo functional quaternary ammonium salts, Cetylpyridinium chloride, Lauryl methyl gluceth-10 hydroxypropyl dimonium chloride, Domiphen bromide, Benzododecinium bromide, Octenidine dihydrochloride, Fluoro-surfactant products, Sulfonates, Sulfates, Carboxylates for example Sodium stearate, Sodium lauroyl sarcosinate, Carboxylate-based fluorosurfactants such as Perfluorononanoate, Perfluorooctanoate (PFOA or PFO), Sodium alkylbenzene sulfonates, Sodium stearate, Potassium alcohol sulfates, Alcohol ethoxylates, Nonylphenoxy polyethylenoxy alcohols, Ethylene oxide/propylene oxide block copolymers, Fatty alcohol ethoxylates for example Narrow-range ethoxylate, Octaethylene glycol monododecyl ether, and Pentaethylene glycol monododecyl ether, Alkylphenol ethoxylates (APEs) for example Nonoxynols and Triton X-100, Special ethoxylated fatty esters and oils, Ethoxylated amines and/or fatty acid amides for example Polyethoxylated tallow amine, Cocamide monoethanolamine, and Cocamide diethanolamine, Terminally blocked ethoxylates for example Poloxamers, Fatty acid esters of polyhydroxy compounds, Fatty acid esters of glycerol for example Glycerol monostearate and Glycerol monolaurate, Fatty acid esters of sorbitol for example Sorbitan monolaurate, Sorbitan monostearate, and Sorbitan tristearate, Fatty acid esters of sucrose, Alkyl polyglucosides for example Decyl glucoside, Lauryl glucoside, and Octyl glucoside, Amine oxides for example Lauryldimethylamine oxide, Sulfoxides for example Dimethyl sulfoxide, Phosphine oxides for example Phosphine oxide, Sulfate, sulfonate, and phosphate esters, alkyl sulfates for example Ammonium lauryl sulfate and Sodium lauryl sulfate (sodium dodecyl sulfate, SLS, or SDS), Alkyl-ether sulfates for example sodium laureth sulfate (sodium lauryl ether sulfate or SLES), and sodium myreth sulfate, Docusate (dioctyl sodium sulfosuccinate), Perfluorooctanesulfonate (PFOS), Perfluorobutanesulfonate, Alkyl-aryl ether phosphates, Alkyl ether phosphates, pH-dependent primary, secondary, or tertiary amines, primary and secondary amines for example Octenidine dihydrochloride, Permanently charged quaternary ammonium salts for example Cetrimonium bromide (CTAB or Cetyltrimethyl ammonium bromide), Cetylpyridinium chloride (CPC), benzalkonium chloride (BAC), benzethonium chloride (BZT), dimethyldioctadecylammonium chloride, and dioctadecyldimethylammonium bromide (DODAB), and combinations thereof.
In some examples, the oleophobic surface coating comprises a thickness between 0.01 micrometers to 100 micrometer. In other examples, the oleophobic surface coating comprises a water contact angle between 100 to 150 degrees as tested by ASTM D7490-13 using distilled water.
In some instances, the heat cured coating material comprises, or is produced using, an organofunctional silane system. In other instances, the heat cured coating material comprises, or is producing using, an epoxysilane.
In an additional aspect, an oleophobic surface coating produced by contacting a surface with a wipe comprising a carrier material and a coating material retained by the carrier material to transfer at least some of the retained coating material from the wipe to the contacted surface is described. In some examples, the surface coating can be produced by heat curing the transferred coating material on the contacted surface to provide the surface oleophobic coating, wherein the surface oleophobic coating provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In some embodiments, the coating material comprises an organofunctional silane system. In other embodiments, the organofunctional silane system is present in an aqueous solution. In certain examples, the coating material comprises an epoxysilane. In other examples, the epoxysilane is present in an aqueous solution.
In some examples, the oleophobic surface coating comprises a thickness between 0.01 micrometers to 100 micrometer. In other examples, the oleophobic surface coating comprises a water contact angle between 100 to 150 degrees as tested by ASTM D7490-13 using distilled water. In certain embodiments, the oleophobic surface coating comprises a material comprising carbon, fluorine, and silicon to provide an oleophobic surface coating that is a crosslinked mesh on the surface. In other embodiments, the coating can be reapplied by contacting the surface with the wipe comprising the carrier material and the coating material retained by the carrier material to transfer additional retained coating material from the wipe to the contacted surface.
In another aspect, an applicator comprising a handle coupled to a carrier material comprising retained coating material is disclosed. In some examples, the carrier material can transfer at least some of the retained coating material from the carrier material to a contacted surface when the applicator and carrier material are pressed against the contacted surface, and wherein the coating material provides an oleophobic surface coating on the contacted surface, wherein the oleophobic surface coating provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius. In some embodiments, the carrier material reversibly couples to the handle through a fastener. In other embodiments, the fastener is a pin or hook and loop fastener or other suitable fasteners. In some embodiments, the handle further comprises a liquid reservoir configured to receive additional coating material in a solution and provide the additional coating material to the carrier material.
In an additional aspect, an applicator comprises a front surface and a back surface, wherein the back surface comprises an opening with a sponge inserted into the opening, wherein the sponge comprises a coating material that can transfer from the sponge to a contacted surface, wherein the transferred coating material provides an oleophobic surface coating on the contacted surface, wherein the oleophobic surface coating provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius. In some examples, the front surface comprises a different texture or roughness than a back surface. In other embodiments, the front surface comprises a carrier material configured to retain the coating material. In some instances, the back surface is configured to buff the oleophobic surface coating on the surface. In other examples, the applicator comprises a package to store the applicator in to prevent the sponge from drying out.
In another aspect, a kit comprises a wipe comprising a carrier material, and a coating material. The coating material can be loaded into the carrier material to permit deposition of the coating material on a surface using the wipe. In some embodiments, the kit comprises instructions for using the wipe and the coating material to provide an oleophobic surface coating that provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius. In other embodiments, the kit comprises one or more of a surfactant, particles or other materials. In some embodiments, the coating material of the kit comprises an organofunctional silane system, an epoxysilane or both or other materials described herein that are used to produce the oleophobic surface coatings.
In an additional aspect, a kit comprises a reservoir configured to receive an aqueous solution, and a coating material. The coating material can be added to the reservoir along with water and optionally one or more organic solvent to permit application of the coating material on a surface, e.g., by spraying, dip-coating, etc. In some embodiments, the kit comprises instructions for using the reservoir and the coating material to deposit an aqueous solution of the coating material on a surface using the applicator, wherein the deposited aqueous solution on the surface provides an oleophobic surface coating that provides easy-to-clean performance in a cleanability test for at least a single cycle and less than ten cycles and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius. In certain examples, the kit may comprise one or more of a surfactant, particles or other materials. In some embodiments, the coating material of the kit comprises an organofunctional silane system, an epoxysilane or both or other materials described herein that are used to produce the oleophobic surface coatings.
In another aspect, an article comprises a surface with an oleophobic surface coating on the surface, wherein the oleophobic surface coating provides easy-to-clean performance in a cleanability test and does not off-gas any hazardous compounds when the oleophobic surface coating is heated to a temperature of 350 degree Celsius.
In some embodiments, the surface comprises a metal, a plastic, a glass or a ceramic. In other examples, the surface comprises a ceramic and the ceramic comprises a vitreous enamel. In certain examples, the oleophobic surface coating is produced using one or more of parylene, organofunctional silanes, fluorinated organofunctional silane, fluorinated organofunctional siloxane, organo-functional oligomeric siloxane, organofunctional resins, hybrid inorganic organofunctional resins, low-surface-energy resins, organofunctional polyhedral oligomeric silsesquioxane (POSS), hybrid inorganic organofunctional POSS resins, fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, hybrid inorganic organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, fluorinated polyhedral oligomeric silsesquioxane (FPOSS), non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, fluorinated alkylsiloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, surface-modified inorganic particles, fluorinated alkylsilane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, polydimethylsiloxane, fluorinated organo-functional oligomeric siloxane, polymer blends, aqueous preparation of an organofunctional silane system, organofunctional polysiloxane, silane based sol-gel system, fluoroalkysilane, hydrolyzable inorganic ethoxysilyl groups, sol-gel systems, silane system, functionalized silanol groups, other similar groups, aqueous, and alcohol-free products of epoxysilanes.
In some embodiments, the oleophobic surface coating is produced using a material comprising carbon, fluorine, and silicon, and wherein the oleophobic surface coating comprises a crosslinked mesh on the surface. In other examples, the oleophobic surface coating covalently bonds to the surface. In some examples, a thickness of the oleophobic surface coating is between 0.01 micrometers to 100 micrometer. In some embodiments, the oleophobic surface coating comprises a mesh with a surface roughness between 0.5 nm to 50 nm.
In some examples, a weight loss of the oleophobic surface coating is less than 1 percent when the oleophobic surface coating is heated to temperatures between 300 degrees Celsius to 400 degrees Celsius for 60 minutes.
In certain embodiments, the oleophobic surface coating comprises, or is produced using, at least particle comprising silica (SiO2) particles, platinum oxide (Pt2O), alumina particles (Al2O3), silicon carbide (SiC), single wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs), diatomaceous earth (DE), boron nitride (BN), titanium oxide (TiO2), mixture of titanium/silica oxide (TiO2/SiO2, titanium inner core/silicon outer surface), ceramic particles, thermo-chromic metal oxides, diamond, particles formed by differential etching of spinodal decomposed glass, molybdenum disulfide (MoS2), boron nitride (BN), sulfides, selenides and tellurides (chalcogenides) of molybdenum, tungsten, niobium, tantalum, and titanium (eg. WS2, WSe2, MoSe2, TaSe2, TiTe2), monochalcenides (GaS, GaSe, SnSe), chlorides of cadmium, cobalt, lead, cerium, zirconium (eg. CdCl2, CoCl2, PbCl2, CeF3, PbI2), borates (eg. Na2B4O7) sulfates (eg. Ag2SO4), black carbon, carbon black, engineered carbon-based nanomaterials, e.g., carbon nanotubes, fullerenes, and graphene. In some examples, the particles are functionalized with a compound comprising one or more of organofunctional silane, parylene, fluorinated alkylsilane, fluorinated alkylsiloxane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, polydimethylsiloxane, organofunctional silicone polymers, organofunctional silicone copolymers, fluorinated organofunctional silicone copolymers, organo-functional oligomeric siloxane, fluorinated organo-functional oligomeric siloxane, organofunctional polyhedral oligomeric silsesquioxane (POSS), fluorinated polyhedral oligomeric silsesquioxane (FPOSS), fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, and organofunctional silane systems.
In some embodiments, a coating material used to produce the oleophobic surface coating provides proper dispersion onto the surface, wherein proper dispersion is identified by a contact angle of less than 50 degrees between a droplet of the coating material and the surface. In some examples, the proper dispersion on the surface is provided without any cleaning or pre-treatment of the surface.
In some examples, the proper dispersion is provided upon pre-treating the surface before applying the coating material. In other examples, the pre-treating the surface comprises using an organic solvent. In additional examples, the organic solvent comprises one or more of toluene, ethanol, iso-propanol, and acetone. In some embodiments, pre-treating the surface comprises cleaning or treating the surface using water or an aqueous solution. In other embodiments, the water or aqueous solution comprises an aqueous solution of organic and/or inorganic acids. In some examples, the acidic solution comprises one or more of hydrochloric acid, phosphoric acid, oxalic acid, sulfuric acid, and citric acid. In other examples, the water or aqueous solution comprises an alkaline solution. In certain embodiments, the alkaline solution comprises one or more of sodium hydroxide, potassium hydroxide, ammonium hydroxide, and tetramethyl ammonium hydroxide. In other embodiments, pre-treating the surface comprises cleaning or treating the surface using an oxide. In further embodiments, the oxide comprises one or more of cerium oxide, SiO2, Al2O3, Fe2O, In2O3, SnO2, ZrO2, B2O3, and TiO2.
Additional aspects, embodiments, configurations, examples and illustrations are described in more detail below.
Certain configurations are described below with reference to the accompanying drawings in which:
It will be recognized by the skilled person in the art, given the benefit of this disclosure that the dimensions of the applicators, wipes, etc. are not necessarily to scale. The exact dimensions and configurations may vary as desired.
Certain embodiments are described that are directed to a wipe that comprises one or more materials that can be applied to a surface. Contact of the wipe by the surface can result in transfer of at least some of the material from the wipe to the surface leaving behind the material on the surface. The material on the surface can be used to form a coating which may provide one or more desired properties including, but not limited to, oleophobicity, a coating that does not off-gas up to about 350 degrees Celsius and/or a coating which is easy to clean. Various illustration of wipes, materials retained by the wipes, coatings produced using the wipes and applications of the wipes and coatings are described in more detail below. For ease of description, the components of the wipes and resulting coatings are described separately below in various sections. This separation is not intended to limit or require the wipe or the coating to have only those components described in any one section or paragraph. The person having ordinary skill in the art, given the benefit of this disclosure, will recognize that many different combinations of materials can be present in the wipes and in the coatings.
In certain examples, a wipe that is moistened with one or more materials can be used to transfer the material from the wipe to a surface. Applicators and other devices can be used to assist in wiping the surface. In other instances, the material can be sprayed or otherwise deposited on a surface and a wipe or a brush, which may be dry or may also include the material, can be used to spread the material around. Applicators and other devices can be used to assist in spreading of the material using the wipe.
In some embodiments, a coating is produced on the surface which is generally considered an oleophobic coating. Oleophobic coatings have a contact angle of more than 90 degrees with a droplet of grape seed oil as measured by the ASTM D7490-13 standard.
In other embodiments, a coating is produced that does not result in any off-gassing of hazardous halogenated materials, e.g., fluorinated materials, when the surface including the coating is heated to a temperature of about 350 degrees Celsius. For example, the coating can be present on a surface to enhance cleanability of the surface. In some instances, debris, residue or other materials may end up on the surface during or after heating of the surface. The presence of the coating permits removal of the debris or residue in an easy manner. Where the coating does not provide any off-gassing of halogenated materials, the coating may also be oleophobic as noted herein.
In other examples, the coating on the oven surface may provide “easy-to-clean” performance in a cleanability test for a certain number of cycles, e.g., 1 cycle, up to 5 cycles, up to 10 cycles, 10 cycles or more, etc. While there is no exact standard used to determine easy-to-clean performance, as used herein, a surface coating on a surface is considered to meet the easy-to-clean performance criteria in a cleanability test if a cleaning process with the following steps can completely remove the residue of burnt ketchup (burned at 230 degrees Celsius to 300 degrees Celsius for 30 minutes to 1 hour after adding about one gram of ketchup to the surface as a spot) from the oven surface that includes the coating: (1) Cleaning is performed using a soft cloth or a Surface-care sponge (cleaning Scouring Sponge or abrasive sponge such as Green 3M Sponge should not be used for cleaning); (2) cleaning is performed either without any liquid or in the presence of hot water, mild detergent, or liquid abrasive cleaner (oven cleaner or other harsh chemicals should not be used for cleaning); the maximum allowable force for cleaning is four (4) kgf, and the surface can be wiped up to fifteen (15) separate times for removing the residue. If all residue is removed from the surface under these conditions, then the surface is considered an easy-to-clean surface. Performing of these steps is considered a single cycle under the cleanability test. In a successive cycle, about one gram of ketchup is applied to the same spot on the surface, burned and then the cleaning process is repeated. Where the coating provides easy-to-clean performance, it may also be oleophobic. Where the coating provides easy-to-clean performance and is oleophobic, it may also not result in any off-gassing when the surface is heated up to about 350 degrees Celsius.
Wipe Materials
In certain embodiments, the wipes described herein may comprise a carrier material that retains the material(s), at least to some degree, that provides the coating on a surface. The retention of the carrier material is not so high or the amount of the material(s) is not so small that the material(s) used to provide the coating cannot be transferred to a surface. For example, the carrier material can be sprayed with the material(s) that provides the coating, can be soaked in the material(s) that provides the coating, dipped into the material(s) that provides the coating or otherwise loaded with the material(s) that provides the coating.
In certain embodiments, the wipe can comprise any woven or nonwoven web material or other suitable materials that can retain the coating materials to at least some degree. The wipe may comprise a blend of natural pulp and/or man-made fibers. The pulp component of the wipe can be include, but is not limited to, natural cellulosic fibers, cotton, wood fibers, softwood paper making pulp, such as spruce, hemlock, cedar and pine, hardwood pulp and non-wood pulp, such as hemp and sisal. In addition, the nonwoven web material can include, but is not limited to, wood pulp and man-made fibers. Examples of man-made fibers include, but are not limited to, cellulosic fibers, cellulose acetate, polyester, nylon and polypropylene fibers. The wipe may comprise papers, plastics or other polymers and may optionally comprise gels or other materials which can be used to assist in retention of the material(s) used to provide the coating.
In other instances, the wipe itself may be “dry” and may not comprise a material to be coated but instead can be used to spread the material to be coated onto or around a surface. For example, the material(s) used to provide the coating may be sprayed onto a surface, and the wipe can then be used to spread the sprayed material around the surface. In other instances, the wipe may also comprise a material(s) used to provide a coating and be used to spread material(s) that has been sprayed onto a surface.
In some examples, the wipe may be individually packaged in a pouch or other packaging. Where the wipe comprises a material(s) that provides a coating, the packaging used desirably prevents the wipe from drying out. This configuration permits reuse of the wipe multiple times. An illustration of a wipe 110 in a package 105 is shown in
In certain examples, the wipe may instead be present as a single wipe in a roll of wipes. The whole roll of wipes is placed in a package. The packaging used desirably prevents the roll of wipes from drying out. An illustration is shown in
In certain embodiments, the wipes may include other materials including colorants, markings or other materials. In some examples, the wipes are white in color, whereas in other instances the wipes may comprise a high visibility material to permit easier viewing of the wipes in darker environments. The wipes can be textured, smooth or include a desired density or pores or roughness. The wipes can be shaped differently including square, rectangular, circular, elliptical or other geometric shapes. The wipes can also be sized differently. For example, the wipe can be sized and arranged as an insert which can occupy substantially all of a lower surface in an item to be coated, e.g., can occupy a lower surface of an oven. In other examples, the wipe can be sized and arranged to be placed on top of a surface to be coated, and the wipe can be pressed to transfer at least some of the material(s) to the surface. The wipe can remain in place during curing or drying of the coating or may be removed prior to curing or drying of the coating.
Materials Used to Produce Coatings
In some embodiments, the material(s) used to produce the coating may provide a coating with one or more of the following properties: an oleophobic coating, a coating that does not off-gas halogens such as fluorine upon heating up to 350 degrees Celsius and a coating with easy-to-clean performance. The exact material or materials used to provide the coatings can vary. In some embodiments, the materials used to provide the coating may be present in a wipe, a spray, a liquid, an aerosol or take other forms to permit an end-user to transfer at least some of the material to the surface to be coated. One problem with conventional coatings is their durability. After end users buy the coated product (for example an oven), the coating may be damaged due to mechanical forces (for example abrasion due to the use of a sponge), chemical exposure (for example, due to the oil that comes from burnt food or the cleaning agent used during cleaning). Thermal cycling may also cause coating destruction. When the original manufacturer applies the coating on the surface, it usually goes through a sophisticated process like roughening or a high baking temperature. Therefore, reapplying conventional coatings in working conditions (for example, in people's houses) is not realistic or possible. In contrast, the coatings described herein can be easily reapplied and cured in a domestic or commercial setting. For example, the coatings can be reapplied using wipes or brushes. The material can also be sprayed on the surface and then spread on the surface using a wipe or a brush. Reapplication of the coating can retrieve the easy-to-clean properties of the coating. In some examples, as noted herein a wipe soaked in the coating material(s) or used to apply the coating, can be used to reapply the coating. In some instances, a first wipe is used to clean or pretreat the surface (cleaning wipe), whereas in other examples no cleaning or pretreatment is performed. Where a pre-coating wipe is used for cleaning the surface, this wipe can be replaced with sprays and cleaning agents if desired. A second wipe or other applicator such as a spray can be used to then apply the coating material to the cleaned surface. Once applied, the material can be heat cured to provide a resulting coating on the surface.
In some examples, the material(s) used to provide the coating may comprise POLYFLON PTFE, NEOFLON dispersion, Unidyne Multi-Series™ such as Unidyne TG-5545 and Unidyne TG-5601, DAI-EL Latex fluoroelastomer SILRES® BS 39, TES 40 WN, Sureco, AsahiGuard E-SERIES™, polytetrafluorethylene (PTFE), parylene, organofunctional silanes, fluorinated organofunctional silane, fluorinated organofunctional siloxane, organo-functional oligomeric siloxane, organofunctional resins, hybrid inorganic organofunctional resins, low-surface-energy resins, organofunctional polyhedral oligomeric silsesquioxane (POSS), hybrid inorganic organofunctional POSS resins, fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, hybrid inorganic organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, fluorinated polyhedral oligomeric silsesquioxane (FPOSS), non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, fluorinated alkylsiloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, surface-modified inorganic particles, fluorinated alkylsilane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, polydimethylsiloxane, fluorinated organo-functional oligomeric siloxane, polymer blends, aqueous preparation of an organofunctional silane system, organofunctional polysiloxane, silane based sol-gel system, fluoroalkysilane, hydrolyzable inorganic ethoxysilyl groups, sol-gel systems, silane system, functionalized silanol groups, other similar groups, aqueous, alcohol-free products of epoxysilanes, or any combination thereof.
In certain embodiments, the materials used to provide the coatings may comprise a silane system such as, for example, silane compounds comprising alkoxysilanes or organoalkoxysilanes such as, for example, tris(triethoxysilylpropyl)amine (tris-AMEO). In certain examples, the surface coating may be produced using one or more silane systems comprising trisamino-functional alkoxysilanes, such as tris(triethoxysilane)-amine or tris(trimethoxysilane)amine, alkoxysilanes or organoalkoxysilane systems from the group of n-propyltriethoxysilane, n-propyltrimethoxysilane (PTMO), 3-glycidyloxypropyltriethoxysilane (GLYEO), 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltriethoxysilane (AMEO), 3-aminopropyltrimethoxysilane (AMMO), methacryloxypropyltriethoxysilane (MEEO), methacryloxypropyltrimethoxysilane (MEMO), N-(n-butyl)-3-aminopropyltriethoxysilane, vinyltrimethoxysilane (VTMO), N-(n-butyl)-3-aminopropyltrimethoxysilane (Dynasylan® 1189), 3-mercaptopropyltrimethoxysilane (MTMO), 3-mercaptopropyltriethoxysilane (MTEO), N-2-aminoethyl-3-aminopropyltrimethoxysilanes (DAMO), polyethylene glycol-functionalized alkoxysilanes, tetraethoxysilane (Dynasylan A), tetramethoxysilane (Dynasylan M), methyltriethoxysilane (MTES), methyltrimethoxysilane (MTMS), bis(triethoxysilylpropyl)tetrasulphane (Si 69), bis(triethoxysilylpropyl)-disulphane (Si 266), bis(trimethoxysilylpropyl)disulphane, bis(trimethoxysilylpropyl)tetrasulphane, vinyltriethoxysilane (VTEO), 1-aminomethyltriethoxysilyne, 1-aminomethyltrimethoxysilyne, 1-methacryloxymethyltrimethoxysilane, 1-methacryloxymethyltriethoxysilane, 1-mercaptomethyltriethoxysilane, 1-mercaptomethyltrimethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, octyltriethoxysilane (Dynasylan® OTEO), octyltrimethoxysilane, hexadecyltriethoxysilane, hexadecyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 2-aminoethyl-3-aminopropylmethyldimethoxysilanes, 2-aminoethyl-3-aminopropylmethyldiethoxysilanes, ureidopropyltrimethoxysilane, ureidopropyltriethoxysilane, tridecafluorooctyltriethoxysilane, tridecafluorooctyltrimethoxysilane, organoalkoxysilylalkylsuccinic anhydride such as triethoxysilylpropylsuccinic anhydride, trimethoxysilylpropylsuccinic anhydride, methyldiethoxysilylpropylsuccinic anhydride, methyldimethoxysilylpropylsuccinic anhydride, dimethylethoxysilylpropylsuccinic anhydride, dimethylmethoxysilylpropylsuccinic anhydride—to name just a few examples, Dynasylan® 1151 (alcohol-free aminosilane hydrolysis product), Dynasylan® HS 2627 (alcohol-free cocondensate of aminosilane and alkylsilane), Dynasylan® HS 2776 (aqueous, alcohol-free cocondensate of diaminosilane and alkylsilane), Dynasylan® HS 2909 (aqueous, alcohol-free cocondensate of aminosilane and alkylsilane), Dynasylan® HS 2926 (aqueous, alcohol-free product based on epoxysilane), Dynasylan® SIVO materials (e.g., aqueous, alcohol-free products of epoxysilanes), bis(triethoxysilane)amine and/or bis(trimethoxysilane)amine.
In other instances, the materials used to provide the coatings may be produced using one or more silane systems based on co-condensates of trisamino-functional alkoxysilanes (e.g., such as tris(triethoxysilane)-amine or tris(trimethoxysilane)amine) with one or more of alkoxysilanes or organoalkoxysilane systems from the group of n-propyltriethoxysilane, n-propyltrimethoxysilane (PTMO), 3-glycidyloxypropyltriethoxysilane (GLYEO), 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltriethoxysilane (AMEO), 3-aminopropyltrimethoxysilane (AMMO), methacryloxypropyltriethoxysilane (MEEO), methacryloxypropyltrimethoxysilane (MEMO), N-(n-butyl)-3-aminopropyltriethoxysilane, vinyltrimethoxysilane (VTMO), N-(n-butyl)-3-aminopropyltrimethoxysilane (Dynasylan® 1189), 3-mercaptopropyltrimethoxysilane (MTMO), 3-mercaptopropyltriethoxysilane (MTEO), N-2-aminoethyl-3-aminopropyltrimethoxysilanes (DAMO), polyethylene glycol-functionalized alkoxysilanes, tetraethoxysilane (Dynasylan A), tetramethoxysilane (Dynasylan M), methyltriethoxysilane (MTES), methyltrimethoxysilane (MTMS), bis(triethoxysilylpropyl)tetrasulphane (Si 69), bis(triethoxysilylpropyl)-disulphane (Si 266), bis(trimethoxysilylpropyl)disulphane, bis(trimethoxysilylpropyl)tetrasulphane, vinyltriethoxysilane (VTEO), 1-aminomethyltriethoxysilyne, 1-aminomethyltrimethoxysilyne, 1-methacryloxymethyltrimethoxysilane, 1-methacryloxymethyltriethoxysilane, 1-mercaptomethyltriethoxysilane, 1-mercaptomethyltrimethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, octyltriethoxysilane (Dynasylan® OTEO), octyltrimethoxysilane, hexadecyltriethoxysilane, hexadecyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 2-aminoethyl-3-aminopropylmethyldimethoxysilanes, 2-aminoethyl-3-aminopropylmethyldiethoxysilanes, ureidopropyltrimethoxysilane, ureidopropyltriethoxysilane, tridecafluorooctyltriethoxysilane, tridecafluorooctyltrimethoxysilane, organoalkoxysilylalkylsuccinic anhydride such as triethoxysilylpropylsuccinic anhydride, trimethoxysilylpropylsuccinic anhydride, methyldiethoxysilylpropylsuccinic anhydride, methyldimethoxysilylpropylsuccinic anhydride, dimethylethoxysilylpropylsuccinic anhydride, dimethylmethoxysilylpropylsuccinic anhydride, or Dynasylan® 1151 (alcohol-free aminosilane hydrolysis product), Dynasylan® HS 2627 (alcohol-free cocondensate of aminosilane and alkylsilane), Dynasylan® HS 2776 (aqueous, alcohol-free cocondensate of diaminosilane and alkylsilane), Dynasylan® HS 2909 (aqueous, alcohol-free cocondensate of aminosilane and alkylsilane), Dynasylan® HS 2926 (aqueous, alcohol-free product based on epoxysilane), Dynasylan® SIVO materials (e.g., aqueous, alcohol-free products of epoxysilanes), bis(triethoxysilane)amine and/or bis(trimethoxysilane)amine. Additional co-condensates can be prepared, for example, from tris-AMEO/tris-AMMO and PTMO or with GLYMO or from tris-AMEO/tris-AMMO and AMEO, bis-AMEO, MEMO, VTMO, VTEO, Dynasylan® 1189, mercaptoalkylsilane, DAMO, TRIAMO, Dynasylan® 4144, Dynasylan A, alkyltrialkoxysilane, bis(trialkoxysilylalkyl)-polysulphane (for example Si69), bis(trialkoxysilylalkyl)disulphane (for example Si 266).
In certain instances, the materials used to provide the surface coating can be one or more of tris(trialkoxysilylalkyl)amine, tris-N,N′-(trialkoxysilylalkyl)alkylenediamine and/or tris-N,N′-(trialkoxysilylalkyl)dialkylenetriamine, especially tris(triethoxysilylpropyl)amine (N[(CH2)3Si(OC2H5)3]3, tris-AMEO), tris(trimethoxysilylpropyl)amine (N[(CH2)3Si(OCH3)3]3, tris-AMMO), tris-DAMO (N[(CH2)2NH(CH2)3Si(OCH3)3]3 and/or tris-TRIAMO (N[(CH2)2NH(CH2)2NH(CH2)3Si(OCH3)3]3) In other instances, the surface coating can be produced using one or more of .bis(trialkoxysilylalkyl)amine, bis-N,N′-(trialkoxysilylalkyl)alkylenediamine and/or bis-N,N′-(trialkoxysilylalkyl)dialkylenetriamine, especially bis(triethoxysilylpropyl)amine ((H5C2O)3Si(CH2)3NH(CH2)3Si(OC2H5)3, bis-AMEO), bis(trimethoxysilylpropyl)amine ((H3CO)3Si(CH2)3NH(CH2)3Si(OCH3)3, bis-AMMO), bis-DAMO ((H3CO)3Si(CH2)3NH(CH2)2NH(CH2)3Si(OCH3)3) and/or bis-TRIAMO ((H3CO)3Si(CH2)3NH(CH2)2NH(CH2)2NH(CH2)3Si(OCH3)3), bis(diethoxymethylsilylpropyl)amine, bis(dimethoxymethylsilylpropyl)amine, bis(triethoxysilylmethyl)amine, bis(trimethoxysilylmethyl)amine, bis(diethoxymethylsilylmethyl)amine, bis(dimethoxymethylsilylmethyl)amine, (H3CO)2(CH3)Si(CH2)3NH(CH2)2NH(CH2)3Si(OCH3)2(CH3) and/or (H3CO)3(CH3)Si(CH2)3NH(CH2)2NH(CH2)2NH(CH2)3Si(OCH3)2(CH3), particular preference being given to bis(triethoxysilylpropyl)amine ((H5C2O)3Si(CH2)3NH(CH2)3Si(OC2H5)3, bis-AMEO). In additional instances, the surface coating can be producing using one or more of aminopropyltrimethoxysilane (H2N(CH2)3Si(OCH3)3, AMMO), aminopropyltriethoxysilane (H2N(CH2)3Si(OC2H5)3, AMEO), diaminoethylene-3-propyltrimethoxysilane (H2N(CH2)2NH(CH2)3Si(OCH3)3, DAMO), triaminodiethylene-3-propyltrimethoxysilane (H2N(CH2)2NH(CH2)2NH(CH2)3Si(OCH3)3 (TRIAMO), aminopropylmethyldiethoxysilane, aminopropylmethyldimethoxysilane, 2-aminoethyltrimethoxysilane, 2-aminoethylmethyldimethoxysilane, 2-aminoethylphenyldimethoxysilane, 2-aminoethyltriethoxysilane, 2-aminoethylmethyldiethoxysilane, 2-aminoethyltriethoxysilane, (2-aminoethylamino)ethyltriethoxysilane, 6-amino-n-hexyltriethoxysilane, 6-amino-n-hexyltrimethoxysilane, 6-amino-n-hexylmethyldimethoxysilane, and especially 3-amino-n-propyltrimethoxysilane, 3-amino-n-propylmethyldimethoxysilane, 3-amino-n-propyltriethoxysilane, 3-amino-n-propylmethyldiethoxysilane, 1-aminomethyltriethoxysilane, 1-aminomethylmethyldiethoxysilane, 1-aminomethyltrimethoxysilane, 1-aminomethylmethyldiethoxysilane, N-butyl-3-aminopropyltriethoxysilane, N-butyl-3-aminopropylmethyldiethoxysilane, N-butyl-3-aminopropyltrimethoxysilane, N-butyl-3-aminopropylmethyldimethoxysilane, N-butyl-1-aminomethyltriethoxysilane, N-butyl-1-aminomethylmethyldimethoxysilane, N-butyl-1-aminomethyltrimethoxysilane, N-butyl-1-aminomethylmethyltriethoxysilane, N-cyclohexyl-1-aminomethylmethyltriethoxysilane, N-cyclohexyl-1-aminomethylmethyltrimethoxysilane, N-phenyl-1-aminomethylmethyltriethoxysilane, N-phenyl-1-aminomethylmethyltrimethoxysilane, N-formyl-3-aminopropyltriethoxysilane, N-formyl-3-aminopropyltrimethoxysilane, N-formyl-1-aminomethylmethyldimethoxysilane and/or N-formyl-1-aminomethylmethyldiethoxysilane or mixtures thereof.
In further examples, the materials used to provide the coating can be one or more of propyltrimethoxysilane (PTMO), dimethyldimethoxysilane (DMDMO), dimethyldiethoxysilane, methyltriethoxysilane (MTES), propylmethyldimethoxysilane, propylmethyldiethoxysilane, n-octylmethyldimethoxysilane, n-hexylmethyldimethoxysilane, n-hexylmethyldiethoxysilane, propylmethyldiethoxysilane, propylmethyldiethoxysilane, propyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, n-hexyltriethoxysilane, cyclohexyltriethoxysilane, n-propyl-tri-n-butoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, isobutyltriethoxysilane, hexadecyltriethoxysilane, hexadecyltrimethoxysilane, octadecyltriethoxysilane, octadecyltrimethoxysilane, octadecylmethyldiethoxysilane, octadecylmethyldimethoxysilane, hexadecylmethyldimethoxysilane and/or hexadecylmethyldiethoxysilane and mixtures of these silanes. In other instances, the material used to provide the surface coating can be one or more of 3-glycidoxypropyltrialkoxysilane, as the triethoxy- or trimethoxysilane; epoxycyclohexyltrialkoxysilane, as the triethoxy- or trimethoxysilane.
In some examples, the materials used to provide the coating can be an organofunctionalized alkoxysilane compound such as, for example, bis(triethoxysilylpropyl)disulphane (Si 266), bis(trimethoxysilylpropyl)disulphane, bis(triethoxysilylpropyl)tetrasulphane (Si 69), bis(trimethoxysilylpropyl)tetrasulphane, bis(triethoxysilylmethyl)disulphane, bis(trimethoxysilylmethyl)disulphane, bis(triethoxysilylpropyl)disulphane, bis(diethoxymethylsilylpropyl)disulphane, bis(dimethoxymethylsilylpropyl)disulphane, bis(dimethoxymethylsilylmethyl)disulphane, bis(diethoxymethylsilylmethyl)disulphane, bis(diethoxymethylsilylpropyl)tetrasulphane, bis(dimethoxymethylsilylpropyl)tetrasulphane, bis(dimethoxymethylsilylmethyl)-tetrasulphane, bis(diethoxymethylsilylmethyl)tetrasulphane, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, tetramethoxysilane or tetraethoxysilane.
In some examples, the materials used to provide the coating can be produced one or more fluorosilane systems including, but not limited to, tridecafluoro-1,1,2,2-tetrahydrooctyl-1-trimethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyl-1-triethoxysilane or corresponding mixtures comprising silanes derived therefrom, or 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, 3,3,3-trifluoropropylcyclohexyldimethoxysilane, 3,3,3-trifluoropropylphenyldiethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, 3,3,3,2,2-pentafluoropropylmethyldimethoxysilane, 3,3,3-trifluoropropyloxyethyltrimethoxysilane, 3,3,3-trifluoropropylmercaptoethyltrimethoxysilane, 3,3,3-trifluoropropyloxyethylmethyldimethoxysilane, and especially tridecafluoro-1,1,2,2-tetrahydrooctyltrimethoxysilane and tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, and also acryloyloxypropyltrialkoxysilane, methacryloyloxypropyltrialkoxysilane, where the alkoxy radical can be replaced by methoxy, ethoxy or else propoxy radicals. Suitable compounds are likewise methacryloyloxymethyltriethoxysilane, methacryloyloxymethyltrimethoxysilane, methacryloyloxypropylmethyldiethoxysilane, methacryloyloxypropylmethyldimethoxysilane, methacryloyloxypropylmethyldiethoxysilane, methacryloyloxymethylmethyldiethoxysilane and/or methacryloyloxymethylmethyldimethoxysilane and/or mixtures of any of these compounds. As noted herein, where fluorinated materials are used, the fluorinated materials used do not produce any off-gassing when heated up to 350 degrees Celsius
In certain examples, the materials used to provide the coatings can be produced by mixing a siloxane, organosiloxane, aminosiloxane, siloxane precursor, or aminosiloxane precursor (or combinations thereof) with water, and a catalyst to promote a sol-gel reaction to form a solution having particles. If desired, the sol-gel reaction can be performed without using any organic solvent. Chemical modification of the resulting particles can be performed, for example, by reacting a hydrophobic agent with the particles to provide surface-modified particles. If desired, a surfactant can be added to the surface-modified particles to provide a surface coating material that may be hydrophobic depending on the particular surface modifications performed. The siloxane precursor may comprise, for example, one or more —SiOR or —SiOH functional groups, wherein R is CnH2n+1, and n is a positive integer. In some instances, R may comprise at least one fluoro group or at least one amino group or both. Examples for the siloxane precursor may be tetramethoxysilane (TMOS), tetrathoxysilane (TEOS), titanium tetraisopropoxide, titanium tetramethoxide, titanium tetraethoxide, titanium tetrabutoxide, aluminum tri-sec-butoxide, or zirconium n-butoxide and fluorinated derivatives of these precursors and amino derivatives of these precursors. The catalyst may be, for example, organic acid/base or inorganic acid/base, such as hydrochloric acid, sulfuric acid, nitric acid, acetic acid, potassium hydroxide, sodium hydroxide, ammonium, or the like. Where surface modification occurs, the surface modifying agent may comprise a siloxane, a fluorosiloxane, an aminosiloxane, an aminofluorosiloxane, a silane, a fluorosilane, an aminosilane, an aminofluorosilane, silicone, or combinations thereof. Examples of the fluorine-base surface modifying agents include, but are not limited to, fluorosilane, fluoroalkysilane, polytetrafluoroethylene (PTFE), polytrifluoroethylene, polyvinylfluroride, functional fluoroalkyl compound, 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane or combinations thereof. Where surfactant is present, the surfactant may be an anion surfactant, a cation surfactant, a combination of an anion surfactant and a cation surfactant, a combination of an anion surfactant and a non-ionic surfactant, a combination of anion surfactant and an amphoteric surfactant, or combinations thereof.
In some examples, the materials used to provide the coating may comprise particles. The particles may include, for example, silica (SiO2) particles, platinum oxide (Pt2O), alumina particles (Al2O3), silicon carbide (SiC), single wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs), diatomaceous earth (DE), boron nitride (BN), titanium oxide (TiO2), mixture of titanium/silica oxide (TiO2/SiO2, titanium inner core/silicon outer surface), ceramic particles, thermo-chromic metal oxides, diamond, particles formed by differential etching of spinodal decomposed glass, molybdenum disulfide (MoS2), boron nitride (BN), sulfides, selenides and tellurides (chalcogenides) of molybdenum, tungsten, niobium, tantalum, and titanium (eg. WS2, WSe2, MoSe2, TaSe2, TiTe2), monochalcenides (GaS, GaSe, SnSe), chlorides of cadmium, cobalt, lead, cerium, zirconium (eg. CdCl2, CoCl2, PbCl2, CeF3, PbI2), borates (eg. Na2B4O7) sulfates (eg. Ag2SO4), black carbon, carbon black, engineered carbon-based nanomaterials, e.g., carbon nanotubes, fullerenes, graphene and any combination thereof. As an instance, the materials used to provide the coating may comprise a combination of organofunctional silanes and functionalized particles such as functionalized silicon dioxide particles. If desired, particles may be present as or with the materials used to provide the coating. For example, siloxane particles such as, for example, polydimethylsiloxane (PDMS) particles, can be present as the coating material (or in the coating materials) or may be present in combination with one or more aqueous based coating materials. The particles can be suspended in the aqueous coating materials and may be co-deposited on a surface along with the other coating materials if desired. The particles may be functionalized with a compound selected from the group comprising organofunctional silane, parylene, fluorinated alkylsilane, fluorinated alkylsiloxane, fluorinated based organo-functional silane, fluorinated based organo-functional siloxane, organofunctional resins, hybrid inorganic organofunctional resins, silicone polymers, polydimethylsiloxane, organofunctional silicone polymers, organofunctional silicone copolymers, fluorinated organofunctional silicone copolymers, organo-functional oligomeric siloxane, fluorinated organo-functional oligomeric siloxane, organofunctional polyhedral oligomeric silsesquioxane (POSS), fluorinated polyhedral oligomeric silsesquioxane (FPOSS), fluorinated oligomeric polysiloxane, organofunctional oligomeric poly siloxane, fluorinated organofunctional silicone copolymers, organofunctional silicone polymers, hybrid inorganic organofunctional silicone polymers, organofunctional silicone copolymers, hybrid inorganic organofunctional silicone copolymers, non-volatile linear and branched alkanes, alkenes and alkynes, esters of linear and branched alkanes, alkenes and alkynes, perfluorinated organic material, silane coupling agents, organofunctional silane systems, and any combinations thereof.
In certain instances, the organofunctional silane may comprise amino-functionalities, fluoro-functionalities or both. Similarly, the functionalized silicon dioxide particles may comprise amino-functionalities, fluoro-functionalities or both. In some examples, one or both of the organofunctional silane and functionalized silicon dioxide particles may comprise a silanol group as noted in
In some instances, the materials used to provide the coating may be a fluorine containing material as described for example in WO2017/112724, e.g., may be or may comprise hollow poly(vinylidene difluoride) microspheres. Additional fluorine containing materials such as polytetrafluoroethylene and other fluoropolymers may also be present as part of the materials used to provide the surface coating. As noted herein, where fluorinated materials are present, the fluorinated materials are selected so no off gassing results when the coating is heated up to 350 degrees Celsius.
In some examples, the materials used to provide the coating may comprise one or more materials commercially available from Evonik under the trade name SIVO. In other examples, the materials used to provide the coating may comprise one or more materials commercially available from Daikin including, but not limited to, POLYFLON PTFE enamel coatings, NEOFLON dispersion coatings, Unidyne Multi-Series™ such as Unidyne TG-5545 and Unidyne TG-5601, DAI-EL Latex fluoroelastomer coatings. The other examples are SILRES® BS 39 and TES 40 WN commercially available from Wacker or Sureco and AsahiGuard E-SERIES™ commercially available from AGC Chemicals Company. In other instances, the materials used to provide the coating may comprise polytetrafluorethylene (PTFE). The materials may also comprise mixtures of any of these illustrative materials as well.
In certain examples, the materials used to provide the coating may comprise compounds that include, but are not limited to, carbon, fluorine, and silicon. Moreover, the formed coating can form covalent bonds with the surface. A non-limiting illustration of one bonding mechanism is shown below:
-M-O—+RO—Si(R,R′)—O—→-M-O—Si(R,R′)—O—
where M is the constituent of the surface such as, for example, a metal and R and R′ represent hydrocarbon groups. In some instances, the polymeric constituents of the mixture can cross-link. A non-limiting illustration of the cross-link mechanisms is the one shown below:
—O—Si(R,R′)O(R″)+(R′,R,R″)Si—O—R′″→—O—Si(R,R′)—O—R′″
Where R, R′, R″ and R′″ independently represent hydrocarbon groups or other groups which can be the same or can be different.
In some examples, the materials used to provide the coating may also comprise a surfactant such as, for example, alkylated and heavily alkylated quaternary ammonium salts, perfluorinated organo functional quaternary ammonium salts, Cetylpyridinium chloride, Lauryl methyl gluceth-10 hydroxypropyl dimonium chloride, Domiphen bromide, Benzododecinium bromide, Octenidine dihydrochloride, Fluoro-surfactant products, Sulfonates, Sulfates, Carboxylates for example Sodium stearate, Sodium lauroyl sarcosinate, Carboxylate-based fluorosurfactants such as Perfluorononanoate, Perfluorooctanoate (PFOA or PFO), Sodium alkylbenzene sulfonates, Sodium stearate, Potassium alcohol sulfates, Alcohol ethoxylates, Nonylphenoxy polyethylenoxy alcohols, Ethylene oxide/propylene oxide block copolymers, Fatty alcohol ethoxylates for example Narrow-range ethoxylate, Octaethylene glycol monododecyl ether, and Pentaethylene glycol monododecyl ether, Alkylphenol ethoxylates (APEs) for example Nonoxynols and Triton X-100, Special ethoxylated fatty esters and oils; Ethoxylated amines and/or fatty acid amides for example Polyethoxylated tallow amine, Cocamide monoethanolamine, and Cocamide diethanolamine; Terminally blocked ethoxylates for example Poloxamers, Fatty acid esters of polyhydroxy compounds, Fatty acid esters of glycerol for example Glycerol monostearate and Glycerol monolaurate, Fatty acid esters of sorbitol for example Sorbitan monolaurate, Sorbitan monostearate, and Sorbitan tristearate, Fatty acid esters of sucrose; Alkyl polyglucosides for example Decyl glucoside, Lauryl glucoside, and Octyl glucoside; Amine oxides for example Lauryldimethylamine oxide; Sulfoxides for example Dimethyl sulfoxide; Phosphine oxides for example Phosphine oxide, Sulfate, sulfonate, and phosphate esters; alkyl sulfates for example Ammonium lauryl sulfate and Sodium lauryl sulfate (sodium dodecyl sulfate, SLS, or SDS); Alkyl-ether sulfates for example sodium laureth sulfate (sodium lauryl ether sulfate or SLES), and sodium myreth sulfate; Docusate (dioctyl sodium sulfosuccinate); Perfluorooctanesulfonate (PFOS); Perfluorobutanesulfonate; Alkyl-aryl ether phosphates; Alkyl ether phosphates; pH-dependent primary, secondary, or tertiary amines; primary and secondary amines for example Octenidine dihydrochloride; Permanently charged quaternary ammonium salts for example Cetrimonium bromide (CTAB or Cetyltrimethyl ammonium bromide), Cetylpyridinium chloride (CPC), benzalkonium chloride (BAC), benzethonium chloride (BZT), dimethyldioctadecylammonium chloride, and dioctadecyldimethylammonium bromide (DODAB), and combinations thereof.
In some configurations, the materials described herein to provide the surface coatings are typically present in an aqueous based system during the deposition. For example, the materials may be dissolved in water that optionally contains one or more salts, particles, a surfactant or a dispersant. While organic solvents or other materials can also be present, the use of an aqueous based system to apply the materials reduces toxicity to provide a more environmentally friendly coating. The exact concentration of the materials in water may vary. Further, if desired, materials such as surfactants, dispersants or other materials may also be present to increase the water solubility of the materials that provide the resulting coating. Solvent, for example water, is typically removed during curing by heating of the applied coating material.
Material Application and Applicators
In some configurations, the wipe can be used with an applicator.
In other instances, an applicator can be configured as a block comprising a handle. Referring to
In another configuration, an applicator can be configured to receive a sleeve shaped wipe. Referring to
In some examples, the applicator may not comprise a handle. For example and referring to
In another configuration, the wipe is made in the form of a cover on top of a sponge. For example and referring to
In other examples, the coating material can be present in kit that comprises a spray bottle and a wipe, which may be dry or may comprise the coating material. Referring to
In some configurations, the applicator and/or wipe can apply a coating material to many different types and kinds of surfaces. For example, the coating can be applied on any surface including but not limited to metals, plastics, glass and ceramics. Stay-clean ovens usually include vitreous enamel. The coating should provide a proper dispersion onto the surface. Proper dispersion is identified by a contact angle of less than 50 degrees between a droplet of the mixture and the surface. Depending on the chemistry of the coating material(s) and type of the surface, the proper dispersion on the surface may be provided without the need for the advanced cleaning or treatment of the surface, e.g., little or no surface pre-treatment may occur. In some cases, cleaning and/or treating the surface may be desired to assist in the dispersion of the coating. Cleaning and/or treating the surface can be performed before applying the wipe using such compounds as organic solvents comprising toluene, ethanol, iso-propanol, and acetone, water, acidic solution comprising aqueous solution of organic and/or inorganic acids comprising but not limited to hydrochloric acid, phosphoric acid, oxalic acid, sulfuric acid, and citric acid; alkaline solution comprising but not limited to aqueous solution of sodium hydroxide, potassium hydroxide, ammonium hydroxide, tetramethyl ammonium hydroxide; cerium oxide paste comprising cerium oxide particles and water, an oxide comprising SiO2, Al2O3, Fe2O, In2O3, SnO2, ZrO2, B2O3, and TiO2, hydrolysable organometallic compounds, wherein the metal of the organometallic compounds is selected from a group including but not limited to titanium, zirconium, aluminum, iron, hafnium, niobium, tungsten and silicon, and any combinations thereof. Other materials and compounds can also be used to clean and/or pre-treat the surface. Further, physical pre-treatment using sand-blasting, sanding, polishing, etc. could also be performed if desired. Further, any of these materials can be mixed with the coating material to facilitate deposition of the coating material.
In some examples, a curing process may be needed for the wipe coating at a temperature in the range of 100 degrees Celsius to 400 degrees Celsius for a period of 5 minutes to 24 hours. The heating process can result in evaporation of the solvent from the coating material and provide a heat-cured coating. The curing process can occur at constant or variable temperatures. It can have one or multiple heating steps.
The materials, articles and methods described herein can be used in many different applications. For example, coatings can be applied to different surfaces of cooking ovens including residential ovens, commercial ovens, recreational vehicle ovens, semiconductor processing ovens or other ovens that are heated up to 350 degrees Celsius. For example, surface coatings can be provided on at least one surface of a convection oven, a conventional oven, a pizza oven, microwave oven, combi-oven, and a steam oven. The heating source of the oven can be microwave, electric or gas. The oven can have any configuration of the heating element. As an instance, it can have exposed heating element on the bottom of the oven, or the heating element might be covered with one or more panels or enclosures. The coating can be applied on at least one surface or all surfaces of the oven cavity, including the surface bellow the heating element in ovens with exposed heating elements. In addition, the coating can be applied on both glass part and the ceramic or metal part of the door of the oven. The coating can be applied on the surfaces inside ovens regardless of their material composition. These surfaces can be made of metals for example stainless steel, or ceramic for example vitreous enamel, or glass. The coating may also be applied to insert or liners that may be present below gas burner elements such as those used in gas cooktops in residential, commercial and recreational vehicle settings to facilitate cleaning of the inserts or liners.
Coating Properties
In certain embodiments, the coatings that result from application of the materials to the surface may comprise a thickness in the range of 0.01 micrometers to 100 micrometers. In some cases, the thickness across the surface is substantially uniform. Spreading of the coating materials using the wipe and/or applicators can increase the uniformity of the thickness across the surface. In some cases, some non-uniformity in the thickness of the coating may be observed depending on the way that the coating is applied on the surface. The easy-to-clean performance of the coating does not depend on its uniformity or its thickness. As noted herein, the surface coating also may be oleophobic, e.g., have a contact angle of more than 90 degrees using grape seed oil as tested by the ASTM D7490-13 standard. The surface coating may also exhibit easy-to-clean performance and/or not provide any off gassing of halogenated materials such as fluorinated materials. In some embodiments, the coating can exhibit a cross-linked mesh with an RMS roughness between 0.5 nm to 50 nm. The easy-to-clean performance of the coating does not depend on its roughness.
Certain specific coatings were produced and tested below using organfunctionalized silane systems by applying the coating using a wipe that retained the coating. The organfunctionalized silane systems that can be used will vary and typically water soluble organfunctionalized silane systems are desired to permit heat curing of the applied coating material.
As a non-limiting example, a thickness of around 70 nanometers was measured for a coating on an enamel surface. The oleophobic property of this coating was confirmed by a contact angle measurement test based on the ASTM D7490-13 standard. The contact angle measurements were performed using an Attension® Theta Lite Contact Angle measurement device and its software OneAttension Version 3.2 (r5971) from Biolin Scientific (Gothenburg, Sweden). An oleophobic property is present if the contact angle is more than 90 degree using grape seed oil.
The tested coating exhibited a contact angle between 90° to 120° with grape seed oil.
In another test, the off-gassing characteristics of the coating was evaluated for its stability at high temperature and for detection of volatile chemical compounds released during the experiment using a gas chromatograph mass spectrometer (GC-MS) instrument. In this test the coating was heated to 350 degrees Celsius for 1 hour, and the gasses released from the coating were analyzed using he GC-MS.
The only measurable materials released from the coated enamel surface were water, cyclopentasiloxane decamethyl, and cyclohexasiloxane dodecamethyl. No outgassing of hazardous fluorinated gases was measured.
These results are consistent with the coating being suitable for many different industrial applications where not only it provides the desired hydrophobic and/or oleophobic properties but also is extremely safe for high temperature applications.
The heat resistance of the coating was also tested by Thermogravimetric Analysis (TGA).
Therefore, the coating is stable over this temperature range.
Another test was used to evaluate the coatings ability to be cleaned easily. Easy-to-clean performance was characterized by a cleanability test. The test consisted of adding around one (1) gram of ketchup to the surface and burning the added ketchup at a temperature between 230 degrees Celsius to 300 degrees Celsius for 30 minutes to 1 hour. The burned ketchup residue was then cleaned. The surface is considered easy-to-clean if cleaning process with the following four steps can completely remove the residue of the burnt ketchup from the surface:
If a cleaning process that satisfies above requirements can completely remove the residue of the burnt ketchup, the surface is considered easy-to-clean and provide easy-to-clean performance for the cleaning cycle.
The cleanability test was performed on an enamel surface including the coating (
As shown in
The formation of a covalent bond between the coating and the surface was verified using X-Ray Photoelectron Spectroscopy (XPS).
The coating structure can exhibit a cross-linked mesh with an RMS roughness between 0.5 nm to 50 nm. As a non-limiting example, roughness between 3 nm to 40 nm was measured for the coating when the surface was an enamel surface with the roughness of 1 nm to 2.5 nm.
A 4.5 in by 4.5 in wipe was used to coat an oven panel having dimensions of 18″×28″. The oven was used for four hours (four cooking cycles of one hour) at the temperature of 230 C. The same wipe was then used to reapply the coating on the panel. After reapplication of the coating, again the oven was used for four cooking cycles of one hours (in total four hours) at the temperature of 230 C. The reapplication was repeated five times using a single wipe and the surface remained easy-to-clean throughout the entire time of this test. This test is consistent with a single wipe being capable of providing an easy-to-clean coating on the bottom surface of the oven even after 20 total hours of cooking. The wipe can be stored in its original closed bag after each use, so it can be used for subsequent application of the coating material if desired.
The wipe of Example 7 was used to apply a coating on the bottom surface of an oven. The oven was then used for eight cooking cycles of one hour at the temperature of 230 degrees Celsius. It was found that the surface remained easy-to-clean up to eight cooking cycles.
When introducing elements of the examples disclosed herein, the articles “a,” “an,” “the” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including” and “having” are intended to be open-ended and mean that there may be additional elements other than the listed elements. It will be recognized by the person of ordinary skill in the art, given the benefit of this disclosure, that various components of the examples can be interchanged or substituted with various components in other examples.
Although certain aspects, examples and embodiments have been described above, it will be recognized by the person of ordinary skill in the art, given the benefit of this disclosure, that additions, substitutions, modifications, and alterations of the disclosed illustrative aspects, examples and embodiments are possible.
This application claims priority to, and the benefit of, each of U.S. 62/651,647 filed on Apr. 2, 2018 and U.S. 62/805,886 filed on Feb. 14, 2019. This application is also related to commonly owned patent application U.S. 62/805,880 filed on Feb. 14, 2019 and to commonly owned application filed on even date herewith, bearing U.S. Ser. No. 16/______ and entitled “OVENS AND ARTICLES WITH OLEOPHOBIC SURFACE COATINGS” and bearing attorney docket number MAXTER-700711, which claims priority to U.S. 62/651,647 and U.S. 62/805,880. The entire disclosure of each of these applications is hereby incorporated herein by reference for all purposes.
| Number | Date | Country | |
|---|---|---|---|
| 62651647 | Apr 2018 | US | |
| 62805886 | Feb 2019 | US |
