Composition of and nozzle for spraying a single-component polyurethane foam

Information

  • Patent Grant
  • 10815353
  • Patent Number
    10,815,353
  • Date Filed
    Thursday, April 18, 2019
    5 years ago
  • Date Issued
    Tuesday, October 27, 2020
    3 years ago
  • Inventors
  • Examiners
    • Rioja; Melissa A
    Agents
    • Cislo & Thomas, LLP
Abstract
A composition for a single-component polyurethane foam and a method of using the same. The composition comprises a polyether or polyester or a combination thereof with functionality 2 and a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g, a polyether or polyester or a combination thereof with functionality 3 and a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g, a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof.
Description
TECHNICAL FIELD

This invention relates to a composition for a single component pre-polymer of polyurethane insulating foam and a spray nozzle that incorporates a metering opening to provide for a uniform fan-shaped distribution of the foamed product.


BACKGROUND

Polyurethane foam is increasingly being used as a sealant in both residential and commercial building construction for sealing spaces between door and window frames, in addition to more traditional uses such as insulation. When used as an insulator, polyurethane foam essentially fills any air space between the wall frames of a structure and thereby allows such insulated buildings to require substantially less energy to keep heated or cooled. Further, the foam can be sprayed to insulate spaces as a substitute for electric space heaters.


Polyurethane foam for on-site applications is typically supplied as a “single-component” foam or as a “two-component” foam. With both types of foam, the chemicals which create the foam are typically carried in portable containers, i.e. pressurized cylinders, and applied by an operator via an application gun. For two-component polyurethane foam systems, the two-part products harden by a chemical reaction of a resin and hardener, typically having a relatively short pot life, and may expose users to isocyanates or other toxic compounds. In a two-component foam composition, a reaction between methylene diphenyl diisocyanate (MDI) and glycols takes place directly during the spraying process, which releases to the atmosphere numerous hazardous emissions. During application of a two-component foam, the pressurized cylinders containing the foamable agents and the hardener are connected to a type of spray gun where the components are mixed in appropriate ratios via metering mechanisms contained in the gun and are subsequently sprayed.


There are two principal problems with two-component polyurethane foam systems. One problem is that the guns are typically made of stainless steel and/or brass and contain precise metering mechanisms that must be cleaned shortly after use. The guns must be cleaned shortly after use because in a two-component system, the foam hardens within a relatively short period of time via chemical reaction with the isocyanate hardener. If the foam is allowed to harden within a gun, the relatively costly gun becomes unusable and typically requires disassembly and the replacement of numerous parts in the metering mechanism to return the gun to a usable state.


The other principal problem with two-component polyurethane foam systems is that the isocyanate-based hardener is extremely toxic to the human nervous system. Isocyanates are readily absorbed via inhalation of vapor and skin contact. Therefore, the use of protective clothing and specialized respirators are required by workers applying a two-component polyurethane foam product.


To overcome some of the problems of two-component polyurethane foam systems, one-component foam products have been developed. In a one-component foam product, generally the resin or foamable component and the isocyanate component are supplied in a single pressurized container and dispensed through the container through a valve equipped gun, equipped with a nozzle attached to the pressurized container. With one-component polyurethane foam systems, when the foamable chemicals leave the nozzle reaction with moisture in the air causes the foam to harden. One component polyurethane foam products typically feature less overspray and introduce fewer airborne isocyanates to the atmosphere surrounding the worksite and are otherwise generally less toxic and safer to use than two-component foam systems.


With the development of single-component polyurethane foam systems, a need has arisen in the art for new foam application hardware that takes advantage of the fact that with a single-component system, there is no need to mix chemical components from two pressurized sources in precise ratios. Ideally, a new single-component foam application system would utilize low cost, easily transportable and easy to clean hardware which would allow the use of single-component polyurethane foams in a wider range of applications.


One-component polyurethane foams are used in the construction trades for filling and insulating walls, as well as for acting as a sealant and/or an adhesive. One-component polyurethane foams are particularly well suited for on-site application. They can essentially be used in any other industry where quality insulation is required. On-site applications for polyurethane foam have increased substantially in recent years extending the application of polyurethane foam beyond its traditional usage in the packaging and insulation fields. For example, polyurethane foam is increasingly being used as a sealant in both residential and commercial building construction for sealing spaces between door and window frames, in addition to more traditional uses as an insulation. In cold weather climates, polyurethane foam is now commonly used as an insulator to fill essentially any air space between the wall frames of a structure. Such insulated buildings require substantially less energy to heat than non-insulated buildings.


One-component polyurethane foams play an important role in improving energy efficiency, significantly improving window and door installation tasks. They can also be used for construction purposes (walls/partitions), and thermal insulation of attic floors, roofs, and basements, etc. In the automotive industry, they can be used as heat and noise insulation, as thermal insulation of refrigerators and insulated tank trucks, etc. In ship building, they can be used for heat-insulating of bulkheads, which prevents the formation of vapors.


Further, one-component polyurethane foams are ecologically-friendly because the main reaction of polymerization of polyisocyanate and polyol to form an isocyanate prepolymer takes place inside a pressured spray canister or spray can. The isocyanate prepolymer represents an intermediate stage in the polymerization process. Isocyanate group-containing prepolymers (isocyanate prepolymer), contained in one-component polyurethane foam compositions are known to those of skill in the art. Such prepolymers are commercially available and usually synthesized by the reaction of one or more polyols, such as a polyester or polyether.


However, most commercially available one-component foams come out in a tiny stream, which makes them suitable only for small-scale insulation (insulating cracks, holes, etc.) Therefore, there is a need in the art for a chemical composition for a one-component polyurethane foam having a viscosity and other characteristics that make the product particularly well-suited for being dispensed from a typical aerosol container, i.e. a spray can, and having a cone-shaped stream with a width of approximately 100 mm to approximately 400 mm.


There is also a need for a spray can nozzle capable of dispensing or spraying a one-component polyurethane foam of appropriate viscosity, at the pressures typically available from a spray can (about 3.5 to 12 atm), wherein the nozzle dispenses the foamable product at a mass flow rate of approximately 6 grams per second to approximately 10 grams per second. Experimentation has shown that such a mass flow rate is capable of covering a 1 m2 surface with a foam layer having a thickness of approximately 30-50 mm after an application time of approximately 1 minute.


SUMMARY OF THE INVENTION

In a first embodiment, the present invention is directed to a composition of a single-component polyurethane foam, comprising a polyether or polyester or a combination thereof with functionality 2 and a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g (and/or molar mass between about 300 g/mol and about 5000 g/mol), a polyether or polyester or a combination thereof with functionality 3 and a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g (and/or molar mass between about 200 g/mol and about 2000 g/mol), a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof


In a second embodiment, the composition only comprises the polyether or polyester or a combination thereof with functionality 2 and a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g (and/or molar mass between about 300 g/mol and about 5000 g/mol) a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof, or


In a third embodiment, the composition only comprises the polyether or polyester or a combination thereof with functionality 3 and a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g (and/or molar mass between about 200 g/mol and about 2000 g/mol), a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof.


In a fourth embodiment, the composition comprises a mixture of a polyether or polyester or a combination thereof with functionality 2 having a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g (and/or molar mass between about 300 g/mol and about 5000 g/mol) and a polyether or polyester or a combination thereof with functionality 3 having a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g (and/or molar mass between about 200 g/mol and about 2000 g/mol), wherein the average functionality of the mixture is between 2.1 and 2.9, a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof


In the first embodiment, the polyether or polyester or a combination thereof with functionality 2 can be from about 5.0 wt. % to about 18.0 wt. % and the polyether or polyester or combination thereof with functionality 3 can be from about 3.0 wt. % to about 10.00 wt. %.


In the second embodiment, the polyether or polyester or a combination thereof with functionality 2 can be from about 5.0 wt. % to about 28.0 wt. %.


In the third embodiment, the polyether or polyester or combination thereof with functionality 3 can be from about 3.0 wt. % to about 28.00 wt. %.


In the fourth embodiment, the mixture of the polyether or polyester with a functionality of 2 and a functionality of 3 can be from about 3.0 wt. % to about 28.0 wt. %.


The fire retarding agent can be tri-chloroethyl phosphate, tris-chloropropyl-phosphate, tris dichloropropyl phosphate or a combination thereof, and can be from about 5.0 wt. % to about 14.0 wt. %.


The silicone stabilizer can be polydimethyl siloxane polyoxyalkylene copolymer surfactant, and can be from about 2.5 wt. % to about 14.0 wt. % or from about 4.0 wt. % to about 14.0 wt. %.


The catalyst can be 2,2-dimorpholinodiethylether and can be from about 0.5 wt. % to about 3.0 wt. %.


The polymeric diphenylmethane diisocyanate can be from about 37.0 wt. % to about 49.0 wt. %.


The dimethyl ether can be from about 2.00 wt. % to about 9.10 wt. %.


The propane, isobutane or a combination thereof can be from about 10.0 wt. % to about 22.0 wt. %.


The 1,1-difluoroethane or any other Freon, or any combination thereof can be from about 0.00 wt. % to about 16.00 wt. %.


In a fifth embodiment, the present invention is directed to a method of using the composition. The method comprises the steps of:

    • a. placing the composition within a pre-pressurized container or any other container; and
    • b. dispensing the composition from the container in a wide cone shaped spray.





BRIEF DESCRIPTION OF DRAWINGS


FIG. 1 shows a flow diagram of an exemplary method of production of the composition of the present invention.



FIG. 2 shows a cross-sectional side view of the nozzle for spraying the composition of the present invention.



FIG. 3 shows a perspective view of the nozzle for spraying the composition of the present invention.



FIG. 4 shows a side view of the nozzle for spraying the composition and the spray pattern of the present invention.



FIG. 5 shows a top view of the nozzle for spraying the composition of the present invention.





DETAILED DESCRIPTION OF THE INVENTION

The detailed description set forth below in connection with the appended drawing is intended as a description of presently preferred embodiments of the invention and is not intended to represent the only forms in which the present invention may be constructed or utilized. The description sets forth the functions and the sequence of steps for constructing and operating the invention in connection with the illustrated embodiments. It is to be understood, however, that the same or equivalent functions and sequences may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the invention.


Unless otherwise stated, the following terms as used herein have the following definitions.


“Hydroxyl number” of a polyol refers to the concentration of hydroxyl groups, per unit weight of the polyol, that are able to react with isocyanate groups. Hydroxyl number is reported as mg KOH/g, and is measured according to the standard ASTM D 1638.


The “average functionality”, or “average hydroxyl functionality” of a polyol indicates the number of OH groups per molecule, on average. The average functionality of an isocyanate refers to the number of —NCO groups per molecule, on average.


The meaning of the term “isocyanate prepolymer” includes but is not limited to comprising a mixed polyisocyanate and a polyol in a liquid state.


The meaning of the term “polyisocyanate” includes but is not limited to di or higher isocyanates. The meaning of the term “polyol” includes, but is not limited to, mixtures of polyol and any polyol that can react in a known fashion with an isocyanate in preparing polyurethane foam. A polyol typically contains more than one hydroxyl group, wherein molecules that contain two hydroxyl groups are “diols” and those that contain three hydroxyl groups are “triols,” etc.


The meaning of the term “container” refers to either a pressurized container such as a pressurized spray can or pressured spray canister, or like device, or any other container in which polyurethane foam can be put.


The term “single-component” is defined to contrast the prior art “two-component” polyurethane foam, which hardens by a chemical reaction of a resin and hardener, more specifically a reaction between methylene diphenyl diisocyanate (MDI) and glycols that takes place directly during the spraying process. The “single-component” aspect of the polyurethane foam, although it comprises multiple components/ingredients, refers to the main reaction of polymerization of polyisocyanate and polyol forming an isocyanate prepolymer inside a container, which then hardens through reacting with ambient moisture in the atmosphere.


A single-component polyurethane foam may comprise an isocyanate prepolymer filled into a pressurized spray canister or spray can together with at least one blowing agent or hydrocarbon propellant. A user then, for example, may bring the isocyanate prepolymer out of the pressurized spray canister, while the components of the isocyanate prepolymer cure by cross-linking during reaction with ambient moisture.


The invention accordingly relates to a single-component polyurethane foam comprising at least one polyether or polyester or a combination thereof, with an average functionality ƒ=2, and therefore a linear polymer formed by polymerizing (i.e., a thermoplastic), a hydroxyl value between about 22 mgKOH/g to about 374 mg KOH/g and/or a molar mass of between about 300 g/mol and about 5000 g/mol, water within the polyester, if present, with volume less than 0.80 wt. %, a pH value of the polyester between about 4-8.5, an acid value below or equal to 0.2 mg KOH/g, and a propellant or blowing agent, preferably hydrocarbon-based and of an alkaline type having the formula CnH(2n+2) (n being equal to or between 2 and 5).


Optionally, the single-component polyurethane foam further comprise at least one polyether or polyester or a combination thereof, with an average functionality ƒ=3, with a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g and/or a molar mass between about 200 g/mol and about 2000 g/mol, either in combination with or as a replacement for the polyether or polyester having a functionality ƒ=2. Optionally, the hydroxyl value of the polyether or polyester with an average functionality ƒ=3 can be between about 340 mg KOH/g to about 842 mg KOH/g.


If the polyether or polyester having a functionality ƒ=2 used in combination with the polyether or polyester having a functionality ƒ=3, the average functionality of the combination is between 2.1 and 2.9.


Optionally, the foam can further comprise:


a fire-retarding agent such as tris(2-chloroethyl) phosphate (TCEP), tris(chloropropyl) phosphate, or tris(dichloropropyl) phosphate, or any combination thereof;


a silicone stabilizer such as polydimethylsiloxane-polyoxyalkylene, which is a copolymer surfactant;


a catalyst such as 2,2-dimorpholinodiethylether;


polymeric diphenylmethane diisocyanate (MDI);


a dimethylether;


propane, isobutane, or any combination thereof; and


1,1-difluoroethane or any other Freon, or any combination thereof.


The functionality of a monomer molecule is the number of functional groups that participate in the polymerization. Monomers with functionality greater than two will introduce branching into a polymer, and the degree of polymerization will depend on the average functionality fav per monomer unit.


The polyether or polyester with a functionality ƒ=2 can comprise from about 5.0 wt. % to about 18.0 wt. % of the foam or from about 5.0 wt. % to about 28.0 wt. % of the foam.


The polyether or polyester with a functionality ƒ=3 can comprise from about 3.0 wt. % to about 10.0 wt. % of the foam or from about 3.0 wt. % to about 28.0 wt. % of the foam.


If the polyether or polyester having a functionality ƒ=2 is used in combination with the polyether or polyester having a functionality ƒ=3, the combination is from about 3.0 wt. % to about 28.0 wt. % of the foam.


The fire retarding agent can comprise from about 5.0 wt. % to about 14.0 wt. % of the foam.


The silicone stabilizer can comprise from about 4.0 wt. % to about 14.0 wt. % of the foam or from about 2.5 wt. % to about 14.0 wt. %.


The catalyst can comprise from about 0.5 wt. % to about 3.0 wt. % of the foam.


The polymeric diphenylmethane diisocyanate (MDI) can comprise from about 37.0 wt. % to about 49.0 wt. % of the foam.


The dimethylether can comprise from about 2.0 wt. % to about 9.10 wt. % of the foam.


The propane, isobutene, or combination thereof, can comprise from about 10.0 wt. % to about 22.0 wt. % of the foam.


The 1,1-difluoroethane or any other Freon, or any combination thereof can comprise from about 0.0 wt. % to about 16.0 wt. % of the foam.


EXAMPLES

In preferred first embodiment, the one-component polyurethane pre-polymer composition comprises:













Components
Parts by Weight







a polyether or polyester, or combination
 5.0-18.0 wt. %


thereof, with a functionality of two



a polyether or polyester, or combination
 3.0-10.0 wt. %


thereof, with a functionality of three



a fire-retarding agent
 5.0-1.4.0 wt. %


a silicone stabilizer
 2.5-14.0 wt. %


a catalyst for foams or their mix
0.5-3.0 wt. %


polymeric diphenylmethane diisocyanate
37.0-49.0 wt. %


a dimethyl ether
 2.0-9.10 wt. %


a propane or a isobutane, or combination
10.0-22.0 wt. %


thereof



1,1-difluoroethane or any other Freon, or any
 0.0-16.0 wt. %


combination thereof









In a second embodiment, the one-component polyurethane pre-polymer composition comprises:













Components
Parts by Weight







a mixture of: a polyether or polyester, or
 3.0-28.0 wt. .%


combination thereof, with a functionality of



two and a polyether or polyester, or



combination thereof, with a functionality of



three



a fire-retarding agent
 5.0-14.0 wt. %


a silicone stabilizer
 2.5-14.0 wt. %


a catalyst for foams or their mix
0.5-3.0 wt. %


polymeric diphenylmethane diisocyanate
37.0-49.0 wt. %


a dimethyl ether
 2.0-9.10 wt. %


a propane or a isobutane, or combination
10.0-22.0 wt. %


thereof



1,1-difluoroethane or any other Freon, or any
 0.0-16.0 wt. %


combination thereof









In a third embodiment, the one-component polyurethane pre-polymer composition comprises:













Components
Parts by Weight







a polyether or polyester, or combination
 5.0-28.0 wt. %


thereof, with a functionality of two



a fire-retarding agent
 5.0-14.0 wt. %


a silicone stabilizer
 2.5-14.0 wt. %


a catalyst for foams or their mix
0.5-3.0 wt. %


polymeric diphenylmethane diisocyanate
37.0-49.0 wt. %


a dimethyl ether
 2.0-9.10 wt. %


a propane or a isobutane, or combination
10.0-22.0 wt. %


thereof



1,1-difluoroethane or any other Freon, or any
 0.0-16.0 wt. %


combination thereof









In a fourth embodiment, the one-component polyurethane pre-polymer composition comprises:













Components
Parts by Weight







a polyether or polyester, or combination
 3.0-28.0 wt. %


thereof, with a functionality of three



a fire-retarding agent
 5.0-14.0 wt. %


a silicone stabilizer
 2.5-14.0 wt. %


a catalyst for foams or their mix
0.5-3.0 wt. %


polymeric diphenylmethane diisocyanate
37.0-49.0 wt. %


a dimethyl ether
 2.0-9.10 wt. %


a propane or a isobutene, or combination
10.0-22.0 wt. %


thereof



1,1-difluoroethane or any other Freon, or any
 0.0-16.0 wt. %


combination thereof









Herein, the weight percentages combining to total 100%, with water volume within the polymer, if present, to be less than 0.1%.


The single-component polyurethane foam may be prepared by mixing the following components into a mixed collective component in a reactor (S1):


a, from about 5.0 wt. % to about 18.0 wt. % polyether or polyester or a combination thereof with functionality 2 and a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g (and/or a molar mass between about 300 g/mol and about 5000 g/mol),


a, from about 3.0 wt. % to about 10.00 wt. %, polyether or polyester or a combination thereof with functionality 3 and a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g (and/or a molar mass between about 200 g/mol and about 2000 g/mol),


a, from about 5.0 wt. % to about 14.0 wt. % fire-retarding agent,


a, from about 2.5 wt. % to about 14.0 wt. % silicone stabilizer, and


a, from about 0.5 wt. % to about 3.0 wt. % catalyst.


Optionally, instead of using both the polyether or polyester or a combination thereof with functionality 2 and the polyether or polyester or a combination thereof with functionality 3, either the polyether or polyester or a combination thereof with functionality 2 can used alone, or the polyether or polyester or a combination thereof with functionality 3 can be used alone. If the polyether or polyester or a combination thereof with functionality 2 is used alone, then it comprises from about 5.0 wt. % to about 28.0 wt. %. If the polyether or polyester or a combination thereof with functionality 3 is used alone, then it comprises from about 3.0 wt. % to about 28.0 wt. %.


Additionally, it is possible to combine the polyether/polyester with functionality 2 with the polyether/polyester with functionality 3, producing a mixture of the two having an average functionality between 2.1 and 2.9. In this instance, the mixture would have a wt. % from about 3.0 wt. % to about 28.0 wt. %.


Afterwards, one of the four different mixed collective components outlined above is introduced into the container (S2) and polymeric MDI and all other gaseous components are introduced separately into the container (S3).


Experimental results show that the composition of the present invention is an improvement over the prior art because it allows to form a cone-shaped stream, while retaining all of the product's qualities (adhesiveness, structural uniformity, eco-friendliness, etc.) Hence, the present invention is the first one-component polyurethane foam, which has functionality of two-component polyurethane foams in that it is able form a wide cone-shaped stream.


Further, the chemical composition, comprising polyurethane pre-polymer dissolved in liquid hydrocarbons, or other volatile polar solvents, would be in a suspended condition wherein the polymer would be exposed with the gases, namely the hydrocarbon propellant matching the formula CnH(2n+2) (n being equal to or between 2 and 5), or any combination of such hydrocarbons. The volume of the gases must be considerably larger than pre-polymer in the system, and must compound to more than 20 wt. %. Further, in the preferred embodiment, the hydrocarbon is a halogenoalkane gas, which not only participates in foaming and formation of a spongy polymer, but also plays a role in spreading the polymer homogeneously over a surface from the distance.


Further, the composition is suitable for use for general insulation purposes, particularly well-suited to be sprayed from a pressurized container, such as a spray can, or any other container. With a suitable nozzle, the foam composition of the present invention can be sprayed over a surface with a capacity of 1 m2/minute, at a flow rate of the spray of approximately 6 grams per second to approximately 10 grams per second, and gaining a thickness of the coated layer up to 30-50 mm, at typical spray can operating pressures of about 3.5 to 12 atm.


The round slot-shaped orifice allows the polymer to be sprayed over a surface in one very smooth layer; and so that after the final foaming, which takes place not earlier than 15 minutes after spraying, the layer will be smooth and uniform. Other geometrical configurations of the orifice can cause irregularities to the sprayed layer on a surface, which may lead to excessive consumption of product from the spraying system. Further, the viscosity of the product may be varied as necessary to allow the product to be sprayed from spray equipment operating with greater or smaller orifice openings and/or at higher or lower internal pressures.


With reference to FIGS. 2-5, a nozzle 100 of the present invention includes a pressure chamber 102 having a proximate end 104 and distal end 106 with a generally circular bore 108 therebetween. Immediately adjacent the pressure chamber 102 is a nozzle head 103. In fluid communication with the distal end 106 of the generally circular bore 108 of the pressure chamber 102 is a discharge tube 110, having a diameter 121 and a proximate end 112, which is exposed to the generally circular bore 108 of the pressure chamber 102. The discharge tube 110, having a central axis 101, terminates at a distal end 114, which terminates at a round slot-shaped discharge orifice 116.


In the exemplary embodiment, formed into the nozzle head 103 are inwardly angled v-shaped walls 118 (see FIG. 3), forming a 60 degree angle that has a bisecting angle 105. The inwardly angled v-shaped walls 118 intersect with and cut through a portion of the round slot-shaped discharge orifice 116, such that the bisecting angle 105 is 45 degrees from the central axis 101 of the discharge tube 110. Accordingly, the length 122 of the round slot-shaped orifice 116 corresponds to the diameter 121 of the discharge tube 110.


As shown in FIG. 4, the shape of the round slot-shaped discharge orifice 116 allows foamable product to be dispensed from the pressurized source of sprayable foam material in a cone-shaped pattern 120. The length 122 of the round slot-shaped discharge orifice 116 tends to control the effective length 124 of the cone-shaped spray pattern 120. The width 126 of the round slot-shaped discharge orifice 116 tends to control the width 128 of the spray pattern 120. The width of the cone-shaped spray pattern depends on the temperature of the balloon, which must be between 10-50° C., as well as on the distance from the nozzle to the surface being sprayed, and can vary from 100 mm to 400 mm. The distance from the nozzle tip to the sprayed surface should be within 100 mm to 800 mm.


Experimentation has shown that the nozzle 100 having a round slot-shaped orifice 116 helps the foam achieve a uniform structure. Experimentation has further shown that the length 122 of the round slot-shaped orifice 116 should ideally be approximately 1.1 mm to approximately 3.5 mm, or ideally at 2 mm.


Experimental results have shown that the polyurethane foam composition of the present invention when loaded in a spray can with an operating pressure of 3.5 to 12 atm and equipped with the nozzle 100 of the present invention provides structural uniformity in the sprayed foam, as well as high adhesiveness, such that the sprayed foam could not be easily removed from a surface. Further, experimental results also show that, when the nozzle 100 of the present invention is used with other one-component polyurethane compositions, the following results are obtained:


When other one-component polyurethane compositions' foams are cut in half, they have ununiformed structures—there were big and small holes.


Half of the other one-component polyurethane compositions' foams were spraying tiny streams (unlike the foam of the present invention that comes out in a wide cone), and the other half of the one-component polyurethane compositions' foams hardly came out at all. The wide, cone-shaped spray of the present invention is advantageous because it provides better surface area coverage than other spray-foams that dispense in tiny streams. This is something that was difficult to achieve with a one-component foam. Greater coverage when being sprayed means quicker application to large surface areas, allowing the present invention to effectively perform its insulation function.


Additionally, all other one-component polyurethane compositions' foams had low adhesiveness, such that we could easily remove the sprayed foams from a surface (unlike the foam of the present invention that could not be removed from the surface without equipment).


The maximum thickness of the coating layer of all other one-component polyurethane compositions' foams was approximately 1 cm (while thickness of the coating layer of the foam of the present invention reached up to approximately 5 cm).

Claims
  • 1. A composition of a single-component polyurethane foam, comprising: a) a polyether or polyester or a combination thereof each with a functionality of 2;b) a polyether or polyester or a combination thereof each with a functionality of 3c) a fire-retarding agent;d) a silicone stabilizer;e) a catalyst;f) polymeric diphenylmethane diisocyanate;g) dimethyl ether;h) propane, isobutane or a combination thereof; andi) 1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other other refrigerant, or any combination thereof;
  • 2. The composition of claim 1, wherein: a) the polyether or polyester or a combination thereof each with a functionality of 2 is from about 5.0 wt. % of the composition to about 18.0 wt. % of the composition;b) the polyether or polyester or combination thereof each with a functionality of 3 is from about 3.0 wt. % of the composition to about 10.00 wt. % of the composition;c) the fire-retarding agent is from about 5.0 wt. % of the composition to about 14.0 wt. % of the composition;d) the silicone stabilizer is from about 2.5 wt. % of the composition to about 14.0 wt. % of the composition;e) the catalyst is from about 0.5 wt. % of the composition to about 3.0 wt. % of the composition;f) the polymeric diphenylmethane diisocyanate is from about 37.0 wt. % of the composition to about 49.0 wt. % of the composition;g) the dimethyl ether is from about 2.00 wt. % of the composition to about 9.10 wt. % of the composition;h) the propane, isobutane or a combination thereof is from about 10.0 wt. % of the composition to about 22.0 wt. % of the composition; andi) 1,1-difluoroethane or trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof is from greater than 0.00 wt. % of the composition to about 16.00 wt. % of the composition.
  • 3. The composition of claim 1, wherein the fire retarding agent is tri-chloroethyl phosphate, tris-chloropropyl-phosphate, tris-dichloropropyl-phosphate or a combination thereof.
  • 4. The composition of claim 1, wherein the silicone stabilizer is a polydimethyl siloxane polyoxyalkylene copolymer surfactant.
  • 5. The composition of claim 1, wherein the catalyst is 2,2-dimorpholinodiethylether.
  • 6. A composition of a single-component polyurethane foam, comprising: a) a polyether or polyester or a combination thereof each with a functionality of 2;b) a fire-retarding agent;c) a silicone stabilizer;d) a catalyst;e) polymeric diphenylmethane diisocyanate;f) dimethyl ether;g) propane, isobutane or a combination thereof; andh) 1,1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof;
  • 7. The composition of claim 6, wherein: a) the polyether or polyester or or a combination thereof each with a functionality of 2 is from about 5.0 wt. % of the composition to about 28.0 wt. % of the composition;b) the fire-retarding agent is from about 5.0 wt. % of the composition to about 14.0 wt. % of the composition;c) the silicone stabilizer is from about 2.5 wt. % of the composition to about 14.0 wt. % of the composition;d) the catalyst is from about 0.5 wt. % of the composition to about 3.0 wt. % of the composition;e) the polymeric diphenylmethane diisocyanate is from about 37.0 wt. % of the composition to about 49.0 wt. % of the composition;f) the dimethyl ether is from about 2.00 wt. % of the composition to about 9.10 wt. % of the composition;g) the propane, isobutane or a combination thereof is from about 10.0 wt. % of the composition to about 22.0 wt. % of the composition; andh) 1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof is from greater than 0.00 wt. % of the composition to about 16.00 wt. % of the composition.
  • 8. The composition of claim 6, wherein the fire retarding agent is tri-chloroethyl phosphate, tris-chloropropyl-phosphate, tris-dichloropropyl-phosphate or a combination thereof.
  • 9. The composition of claim 6, wherein the silicone stabilizer is a polydimethyl siloxane polyoxyalkylene copolymer surfactant.
  • 10. The composition of claim 6, wherein the catalyst is 2,2-dimorpholinodiethylether.
  • 11. A composition of a single-component polyurethane foam, comprising: a) a polyether or polyester or a combination thereof each with a functionality of 3;b) a fire-retarding agent;c) a silicone stabilizer;d) a catalyst;e) polymeric diphenylmethane diisocyanate;f) dimethyl ether;g) propane, isobutane or a combination thereof; andh) 1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof;
  • 12. The composition of claim 11, wherein: a) the polyether or polyester or a combination thereof each with a functionality of 3 is from about 3.0 wt. % of the composition to about 28.00 wt. % of the composition;b) the fire-retarding agent is from about 5.0 wt. % of the composition to about 14.0 wt. % of the composition;c) the silicone stabilizer is from about 2.5 wt. % of the composition to about 14.0 wt. % of the composition;d) the catalyst is from about 0.5 wt % of the composition to about 3.0 wt. % of the composition;e) the polymeric diphenylmethane diisocyanate is from about 37.0 wt. % of the composition to about 49.0 wt. % of the composition;f) the dimethyl ether is from about 2.00 wt. % of the composition to about 9.10 wt. % of the composition;g) the propane, isobutane or a combination thereof is from about 10.0 wt. % of the composition to about 22.0 wt. % of the composition; andh) 1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof is from greater than 0.00 wt. % of the composition to about 16.00 wt. % of the composition.
  • 13. The composition of claim 11, wherein the fire retarding agent is tri-chloroethyl phosphate, tris-chloropropyl-phosphate, tris-dichloropropyl-phosphate or a combination thereof.
  • 14. The composition of claim 11, wherein the silicone stabilizer is a polydimethyl siloxane polyoxyalkylene copolymer surfactant.
  • 15. The composition of claim 11, wherein the catalyst is 2,2-dimorpholinodiethylether.
  • 16. A composition of a single-component polyurethane foam, comprising: a) a mixture of a polyether or polyester or a combination thereof each with a functionality of 2 and a polyether or polyester or a combination thereof each with a functionality of 3, wherein the average functionality of the mixture is between 2.1 and 2.9;b) a fire-retarding agent;c) a silicone stabilizer;d) a catalyst;e) polymeric diphenylmethane diisocyanate;f) dimethyl ether;g) propane, isobutane or a combination thereof; andh) 1,1-difluoroethane, trans-1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof;
  • 17. The composition of claim 16, wherein: a) the mixture is from about 3.0 wt. % of the composition to about 28.0 wt. % of the composition;b) the fire-retarding agent is from about 5.0 wt. % of the composition to about 14.0 wt. % of the composition;c) the silicone stabilizer is from about 2.5 wt. % of the composition to about 14.0 wt. % of the composition;d) the catalyst is from about 0.5 wt. % of the composition to about 3.0 wt. % of the composition;e) the polymeric diphenylmethane diisocyanate is from about 37.0 wt. % of the composition to about 49.0 wt. % of the composition;f) the dimethyl ether is from about 2.00 wt. % of the composition to about 9.10 wt. % of the composition;g) the propane, isobutane or combination thereof is from about 10.0 wt. % of the composition to about 22.0 wt. % of the composition; andh) 1,1-difluoroethane, trans 1,3,3,3-tetrafluoroprop-1-ene, any other refrigerant, or any combination thereof is from greater than 0.00 wt. % of the composition to about 16.00 wt. % of the composition.
  • 18. The composition of claim 16, wherein the fire retarding agent is tri-chloroethyl phosphate, tris-chloropropyl-phosphate, tris-dichloropropyl-phosphate or a combination thereof.
  • 19. The composition of claim 16, wherein the silicone stabilizer is a polydimethyl siloxane polyoxyalkylene copolymer surfactant.
  • 20. The composition of claim 16, wherein the catalyst is 2,2-dimorpholinodiethylether.
  • 21. A method of using the composition of claim 1, the method comprising the steps of: a) placing the composition of claim 1 within a pre-pressurized container or any other container; andb) dispensing the composition from the container in a wide cone shaped spray.
  • 22. A method of using the composition of claim 6, the method comprising the steps of: a) placing the composition of claim 6 within a pre-pressurized container or any other container; andb) dispensing the composition from the container in a wide cone shaped spray.
  • 23. A method of using the composition of claim 11, the method comprising the steps of: a) placing the composition of claim 11 within a pre-pressurized container or any other container; andb) dispensing the composition from the container in a wide cone shaped spray.
  • 24. A method of using the composition of claim 16, the method comprising the steps of: a) placing the composition of claim 16 within a pre-pressurized container or any other container; andb) dispensing the composition from the container in a wide cone shaped spray.
CROSS-REFERENCE TO RELATED APPLICATION

This patent application is a continuation-in-part of U.S. patent application Ser. No. 15/429,586 (filed Feb. 10, 2017), which is a continuation-in-part of U.S. patent application Ser. No. 15/172,575 (filed Jun. 3, 2016). This application is also a continuation-in-part of U.S. patent application Ser. No. 15/955,403 (filed Apr. 17, 2018), which is a divisional of U.S. patent application Ser. No. 15/429,586 (filed Feb. 10, 2017), a continuation-in-part of U.S. patent Ser. No. 15/955,448 (filed Apr. 17, 2018), which is a divisional of U.S. patent application Ser. No. 15/429,586 (filed Feb. 10, 2017), and a continuation-in-part of U.S. patent application Ser. No. 15/955,479 (filed Apr. 17, 2018), which is a divisional of U.S. patent application Ser. No. 15/429,586 (filed Feb. 10, 2017). This application also claims the benefit of U.S. Provisional Patent Application Ser. No. 62/294,974, entitled “One-Component Fire Resistant Polyurethane Foams and Nozzle for Application Thereof,” filed Feb. 12, 2016, and the contents of all the applications listed above are incorporated herein by reference in their entirety.

US Referenced Citations (108)
Number Name Date Kind
1559655 Thompson Nov 1925 A
2722458 Wahlin Nov 1955 A
2768101 Fairchild Oct 1956 A
2785005 Thompson Mar 1957 A
2981712 Harper Apr 1961 A
2985386 Steinen May 1961 A
3085754 Thompson Apr 1963 A
3091551 Robertson May 1963 A
3101906 Webber Aug 1963 A
3236455 Lewis et al. Feb 1966 A
3301493 Frempter Jan 1967 A
3313353 Williamson et al. Apr 1967 A
3401888 Sutter Sep 1968 A
3556411 Nord et al. Jan 1971 A
3647147 Cook Mar 1972 A
3659787 Ito May 1972 A
3737108 Stumphauzer et al. Jun 1973 A
3754710 Chimura Aug 1973 A
3843055 Nord et al. Oct 1974 A
3857809 Oertel et al. Dec 1974 A
3927162 Stalter, Sr. Dec 1975 A
4071195 Kuhns et al. Jan 1978 A
4097000 Derr Jun 1978 A
4117551 Brooks et al. Sep 1978 A
4213936 Lodrick Jul 1980 A
4236674 Dixon Dec 1980 A
4330086 Nysted May 1982 A
4346849 Rood Aug 1982 A
4618101 Piggott Oct 1986 A
4641785 Grothe Feb 1987 A
4646977 Iwamura et al. Mar 1987 A
4759500 Hoffman et al. Jul 1988 A
4811903 Okuma et al. Mar 1989 A
4882107 Cavender et al. Nov 1989 A
5141156 Hoy et al. Aug 1992 A
5143302 Sakuma Sep 1992 A
5167371 Rohner Dec 1992 A
5178325 Nielsen Jan 1993 A
5178326 Kukesh et al. Jan 1993 A
5185383 Regenauer Feb 1993 A
5275340 Haruch Jan 1994 A
5287994 Dempsey Feb 1994 A
5464154 Nielsen Nov 1995 A
5549226 Kopp Aug 1996 A
5597122 Eisenmann Jan 1997 A
5631319 Reese May 1997 A
6136942 Pfenninger et al. Oct 2000 A
6371392 Steinman Apr 2002 B1
6414045 Heimpel et al. Jul 2002 B1
6552097 Pauls et al. Apr 2003 B1
6872337 Mellentine et al. Mar 2005 B2
6894083 Braun et al. May 2005 B2
7111799 Batich et al. Sep 2006 B2
7717357 Gantenbein et al. May 2010 B2
7842749 Shalaby et al. Nov 2010 B2
7958609 Gaydoul Jun 2011 B2
8003708 Javarone Aug 2011 B2
8118052 Swab et al. Feb 2012 B2
8299171 Schmalkuche et al. Oct 2012 B2
8324340 Burckhardt et al. Dec 2012 B2
8557886 Golini et al. Oct 2013 B2
8590816 Ballu Nov 2013 B2
10350617 Slutskii et al. Jul 2019 B1
20030234301 Swan Dec 2003 A1
20040124268 Frazier et al. Jul 2004 A1
20040157945 Barber Aug 2004 A1
20050150982 Lopez et al. Jul 2005 A1
20050222289 Miller Oct 2005 A1
20060182978 Leroy et al. Aug 2006 A1
20070039547 Lacchia Feb 2007 A1
20070069047 Bolman et al. Mar 2007 A1
20070254973 Emge et al. Nov 2007 A1
20080067720 Wiese et al. Mar 2008 A1
20080087745 Pearson et al. Apr 2008 A1
20080290197 Fecht et al. Nov 2008 A1
20090107068 Fay et al. Apr 2009 A1
20090230221 Ballu Sep 2009 A1
20090272826 Kioi Nov 2009 A1
20110059255 Ogonowski Mar 2011 A1
20110121034 Swab et al. May 2011 A1
20120128964 Hulse et al. May 2012 A1
20130266736 Wickert et al. Oct 2013 A1
20130324626 Fabisiak et al. Dec 2013 A1
20140051776 Chen et al. Feb 2014 A1
20140224828 Demey et al. Aug 2014 A1
20150018508 Verbeke et al. Jan 2015 A1
20150018509 Verbeke et al. Jan 2015 A1
20150079406 Tennebroek et al. Mar 2015 A1
20150144249 Bowe et al. May 2015 A1
20150217336 Seidel Aug 2015 A1
20150274967 Taylor Oct 2015 A1
20150321206 Swan Nov 2015 A1
20160271666 Huber Sep 2016 A1
20160288075 Lacroix et al. Oct 2016 A1
20160318050 Zaarbelink Nov 2016 A1
20170225181 Hammerlund Aug 2017 A1
20170241131 Lewis Aug 2017 A1
20170333927 Ross et al. Nov 2017 A1
20170341090 Cameron et al. Nov 2017 A1
20170348713 Titorov Dec 2017 A1
20180029566 Gopalan et al. Feb 2018 A1
20180043376 Titorov et al. Feb 2018 A1
20180043379 Gantenbein et al. Feb 2018 A1
20180079881 Zhang et al. Mar 2018 A1
20180104705 Slutskii et al. Apr 2018 A1
20180104709 Peters Apr 2018 A1
20180111140 Miller Apr 2018 A1
20180117609 Hodgkinson May 2018 A1
Foreign Referenced Citations (3)
Number Date Country
1137698 Dec 1982 CA
1273554 May 1972 GB
2015041552 Mar 2015 WO
Non-Patent Literature Citations (10)
Entry
TAP Plastics, Vinyl Tubing, Apr. 15, 2012, http://www.tapplastics.com/product/plastics/plastic_rods_tubes_shapes/vinyl_tubing/145.
United States Patent and Trademark Office, Office Action Summary dated Oct. 17, 2016, U.S. Appl. No. 15/172,575, 17 pages.
United States Patent and Trademark Office, Office Action Summary dated Jun. 6, 2017, U.S. Appl. No. 15/172,575, 17 pages.
United States Patent and Trademark Office, Office Action Summary dated Feb. 5, 2018, U.S. Appl. No. 15/429,586, 10 pages.
United States Patent and Trademark Office, Office Action Summary dated May 16, 2018, U.S. Appl. No. 15/429,586, 11 pages.
United States Patent and Trademark Office, Office Action Summary dated Feb. 7, 2019, U.S. Appl. No. 15/429,586, 9 pages.
United States Patent and Trademark Office, Office Action Summary dated Jul. 10, 2018, U.S. Appl. No. 15/955,403, 8 pages.
United States Patent and Trademark Office, Office Action Summary dated Dec. 27, 2018, U.S. Appl. No. 15/955,403, 9 pages.
United States Patent and Trademark Office, Office Action Summary dated May 31, 2018, U.S. Appl. No. 15/955,448, 11 pages.
United States Patent and Trademark Office, Office Action Summary dated Jun. 25, 2018, U.S. Appl. No. 15/955,479, 16 pages.
Divisions (5)
Number Date Country
Parent 15429586 Feb 2017 US
Child 15955403 US
Parent 16388391 US
Child 15955403 US
Parent 15429586 Feb 2017 US
Child 15955448 US
Parent 16388391 US
Child 15955448 US
Parent 15429586 Feb 2017 US
Child 15955479 US
Continuation in Parts (6)
Number Date Country
Parent 15429586 Feb 2017 US
Child 16388391 US
Parent 15172575 Jun 2016 US
Child 15429586 US
Parent 16388391 US
Child 15429586 US
Parent 15955403 Apr 2018 US
Child 16388391 US
Parent 15955448 Apr 2018 US
Child 16388391 US
Parent 15955479 Apr 2018 US
Child 16388391 US