Patent Application
20200354591
Disclosed is a composition with anti-adherent properties. More specifically, disclosed is a composition that includes an anti-adherent agent that does not adhere to certain infectious agents, including but not limited to Gram-negative and Gram-positive bacteria. The composition may be applied to or incorporated into articles such as wipes, or into ointments, lotions, creams, salves, aerosols, gels, suspensions, sprays, foams, washes, or the like.
Communicable human infections pass from person to person through various means such as food, aerosols, surfaces and hands. For example, in the United States, foodborne pathogens alone cause an estimated 76 million cases of illness, 325,000 hospitalizations and 5,000 deaths per year. This results in the spending or loss of several billion dollars due to absenteeism, cost of medication, and hospitalization.
Foodborne pathogens are typically a result of poor cleaning of hands and surfaces on which food is prepared. In fact, the kitchen is one of the most contaminated sites in the home. High fecal and coliform concentrations can be found in sponges, dishcloths, and the kitchen sink. Of course, there are other pathogens lurking elsewhere in the home, at the office, and in public places such as public bathrooms, restaurants, malls, theaters, health-care facilities, etc. Such pathogens include bacteria, protein, active enzymes, viruses, and many other microbes that can lead to health problems such as bacterial infections.
There are products used today that are used to clean skin and hard surfaces, such as soaps, hand sanitizers, sprays and wipes. However, even the most diligent efforts to keep clean can be hindered by factors such as surface topography, the presence of hair, and the like. These factors can cause pathogens to better adhere to a surface. Other limiting factors include skin sensitivity due to the handling of cleaning products or the application thereof.
There remains a need for compositions that can be applied to surfaces or incorporated into articles, wherein the compositions prevent the adherence of pathogens. Desirably, the compositions are skin friendly, cost effective, and convenient to use.
In one aspect of the disclosure there is a composition for inhibiting the attachment of microbes to a surface. The composition includes a carrier; and an effective amount of an anti-adherent agent. The anti-adherent agent may be selected from Hydroxypropyl methylcellulose; Methylcellulose, Hydroxypropylcellulose, Hydroxyethylcellulose, Dimethicone PEG-7 Phosphate, Propylene Glycol Alginate, Bis-PEG-15 Dimethicone/IPDI Copolymer, Polyimide-1, Polyquaternium-101, Polyester-5, Hydrolyzed Wheat Protein/PVP Crosspolymer, Polymethacrylamidopropyl Trimonium Chloride, Ethylene Oxide/Propylene Oxide Block Copolymer, Trideceth-9 PG-Amodimethicone (and) Trideceth-12, PEG-12 Dimethicone, Cyclopentasiloxane (and) Caprylyl Dimethicone Ethoxy Glucoside, Dimethicone PEG-8 succinate, Linoleamidopropyl PG-Dimonium Chloride Phosphate Dimethicone, Polyvinyl Pyrrolidone, Gum, Polyacrylate Crosspolymer-11, PEG-8 SMDI Copolymer, Polyvinyl Alcohol, VP/Dimethylaminoethylmethacrylate/Polycarbamyl Polyglycol Ester, VP/Polycarbamyl Polyglycol Ester, VP/Dimethiconylacrylate/polycarbamyl Polyglycol Ester, Acrylates/Steareth-20 Methacrylate Copolymer, a mixture of Acrylates Copolymer and VP/Polycarbamyl Polyglycol Ester; and any combination thereof.
In another aspect of the disclosure there is a wipe made from a nonwoven substrate, a liquid carrier; and an anti-adherent agent. The anti-adherent agent may be selected from the following: Hydroxypropyl methylcellulose; Methylcellulose, Hydroxypropylcellulose, Hydroxyethylcellulose, Dimethicone PEG-7 Phosphate, Propylene Glycol Alginate, Bis-PEG-15 Dimethicone/IPDI Copolymer, Polyimide-1, Polyquaternium-101, Polyester-5, Hydrolyzed Wheat Protein/PVP Crosspolymer, Polymethacrylamidopropyl Trimonium Chloride, Ethylene Oxide/Propylene Oxide Block Copolymer, Trideceth-9 PG-Amodimethicone (and) Trideceth-12, PEG-12 Dimethicone, Cyclopentasiloxane (and) Caprylyl Dimethicone Ethoxy Glucoside, Dimethicone PEG-8 succinate, Linoleamidopropyl PG-Dimonium Chloride Phosphate Dimethicone, Polyvinyl Pyrrolidone, Gum, Polyacrylate Crosspolymer-11, PEG-8 SMDI Copolymer, Polyvinyl Alcohol, VP/Dimethylaminoethylmethacrylate/Polycarbamyl Polyglycol Ester, VP/Polycarbamyl Polyglycol Ester, VP/Dimethiconylacrylate/polycarbamyl Polyglycol Ester, Acrylates/Steareth-20 Methacrylate Copolymer, a mixture of Acrylates Copolymer and VP/Polycarbamyl Polyglycol Ester; and any combination thereof.
Once the compositions of the present disclosure are applied to a surface and dried, the remaining films do not attract or attach to new microbes, leaving surfaces less apt to harbor microbes.
The present disclosure is directed to an anti-adherent composition containing an anti-adherent agent and a carrier. The composition may be applied to a surface in the form of a liquid, gel, or foam; or incorporated into a wash. In addition, the composition may be applied to a surface with a vehicle such as a wipe.
The anti-adherent composition may be used on biotic surfaces such as skin or plants; or abiotic surfaces such as food prep surfaces; hospital and clinic surfaces; household surfaces; automotive, train, ship and aircraft surfaces; and the like; as long as the surface is compatible with the ingredients of the composition.
According to the High Throughput Anti-adherence Test Method or the Viable Count Anti-Adherence Test Method, infra, the anti-adherent composition reduces adherence to Gram-negative and Gram-positive bacteria by at least 0.5 Log, or by at least 0.9 Log, or by at least by 1 Log.
The anti-adherent agents suitable for use in the composition may include but not be limited to acrylates, acrylate derivatives, polysaccharides, cellulosics, cellulosic derivatives, uerethanes, uerethane derivatives, vinyl derivative, and silicone polyethers.
Suitable polysaccharides may include but not be limited to gums and cellulosics. Suitable nonionic cellulose ethers, for instance, may be produced in any manner known to those skilled in the art, such as by reacting alkali cellulose with ethylene oxide and/or propylene oxide, followed by reaction with methyl chloride, ethyl chloride and/or propyl chloride. Nonionic cellulosic ethers and methods for producing such ethers are described, for instance, in U.S. Pat. No. 6,123,996 to Larsson, et al.; U.S. Pat. No. 6,248,880 to Karlson; and U.S. Pat. No. 6,639,066 to Bostrom, et al., which are incorporated herein in their entirety by reference thereto for all purposes. Some suitable examples of nonionic cellulosic ethers include, but are not limited to, water-soluble alkyl cellulose ethers, such as methyl cellulose and ethyl cellulose; hydroxyalkyl cellulose ethers, such as hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl hydroxybutyl cellulose, hydroxyethyl hydroxypropyl cellulose, hydroxyethyl hydroxybutyl cellulose, and hydroxyethyl hydroxypropyl hydroxybutyl cellulose; alkyl hydroxyalkyl cellulose ethers, such as methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, ethyl hydroxypropyl cellulose, methyl ethyl hydroxyethyl cellulose, and methyl ethyl hydroxypropyl cellulose; and so forth . Particularly suitable nonionic cellulosic ethers for use in the present disclosure are hydroxypropyl methylcellulose, cellulose gum, and methylcellulose.
One example of suitable nonionic cellulose ether for use as the nonionic polymer of the present disclosure is hydroxypropyl methylcellulose (BENECEL E-15 [average molecular weight 15,000 Daltons] available from Ashland and HPMC [average molecular weight 86,000 Daltons] from Sigma Aldrich). The hydroxypropyl methylcellulose may have a molecular weight of about 1,000 Daltons to about 500,000 Daltons, or about 10,000 Daltons to about 100,000 Daltons, or about 10,000 Daltons to about 40,000 Daltons.
Another example of suitable nonionic cellulose ether for use as the nonionic polymer of the present disclosure is hydroxyethylcellulose (NATROSOL 250LR [average molecular weight 90,000 Daltons] and NATROSOL 250 GR [average molecular weight 300,000 Daltons] available from Ashland). The hydroxyethylcellulose may have a molecular weight of about 10,000 Daltons to about 500,000 Daltons, or about 15,000 Daltons to about 300,000 Daltons, or about 75,000 to about 350,000 Daltons.
A further example of suitable nonionic cellulose ether for use as the nonionic polymer of the present disclosure is hydroxypropyl cellulose (KLUCEL ECS [average molecular weight 80,000 Daltons] from Ashland). The hydroxyethylcellulose may have a molecular weight of about 10,000 Daltons to about 500,000 Daltons, or a molecular weight of about 10,000 Daltons to about 100,000 Daltons, or about 60,000 Daltons to 100,000 Daltons.
Yet another example of suitable nonionic cellulose ether for use as the nonionic polymer of the present disclosure includes methylcellulose (BENECEL A4C [average molecular weight 41,000 Daltons] available from Ashland). The methylcellulose may have a molecular weight of about 1,000 Daltons to about 500,000 Daltons, or about 10,000 Daltons to about 100,000 Daltons, or about 20,000 Daltons to about 50,000 Daltons.
Gums are also suitable materials for use as the anti-adherent. The materials in this group are generally plant-derived materials which belong to the chemical class of carbohydrates. Although chemically diverse, the unique ability of gums to swell in the presence of water and to increase the viscosity of aqueous preparations accounts for this special class. The viscosity developed by hydrophilic colloids depends on their molecular weight and the presence of various cations which may neutralize some acid functions of these carbohydrate molecules or cause some cross linking. In cosmetics, gums and the like are used to impart viscosity to all types of products. They act as suspending or gelling agents and emulsion stabilizers. Some of these gums have unique textural qualities which make them useful in water-based lubricants. Suitable gums for use in the present disclosure include but are not limited to Acacia Catechu Gum, Acacia Farnesiana Gum, Acacia Senegal Gum, Acacia Seyal Gum, Acacia Seyal Gum Octenylsuccinate, Agar, Algin, Alginic Acid, Ammonium Alginate, Amylopectin, Ascorbyl Methylsilanol Pectinate, Astragalus Gummifer Gum, Boswellia Serrata Gum, Caesalpinia Spinosa Gum, Calcium Alginate, Calcium Carboxymethyl Cellulose, Calcium Carrageenan, Carboxybutyl Chitosan, Carboxymethyl Cellulose Acetate Butyrate, Carboxymethyl Chitin, Carboxymethyl Dextran, Carboxymethyl Hydroxyethylcellulose, Carboxymethyl Hydroxypropyl Guar, Carrageenan, Cassia Gum, Cellulose Gum, Ceratonia Siliqua (Carob) Gum, Cyamopsis Tetragonoloba (Guar) Gum, Dehydroxanthan Gum, Dextran, Dextran Sulfate, Dextrin, Dextrin Behenate, Gelatin, Gelatin Crosspolymer, Gellan Gum, Ghatti Gum, Glyceryl Alginate, Glyceryl Starch, Guar Hydroxypropyltrimonium Chloride, Hydrolyzed Caesalpinia Spinosa Gum, Hydrolyzed Carrageenan, Hydrolyzed Cellulose Gum, Hydrolyzed Ceratonia Siliqua Gum Extract, Galactoarabinan, Hydrolyzed Furcellaran, Hydrolyzed Gelatin, Hydrolyzed Guar, Hydrolyzed Pectin, Hydrolyzed Rhizobian Gum, Hydrolyzed Sclerotium Gum, Hydroxybutyl Methylcellulose, Hydroxyethylcellulose, Hydroxyethyl Ethylcellulose, Hydroxypropylcellulose, Hydroxypropylcellulose, Hydroxypropyl Chitosan, Hydroxypropyl Methylcellulose, Hydroxypropyl Methylcellulose Acetate/Succinate, Hydroxypropyl Methylcellulose Stearoxy Ether, Hydroxypropyl Oxidized Starch, Hydroxypropyl Starch, Hydroxypropyl Xanthan Gum, Locust Bean Hydroxypropyltrimonium Chloride, Magnesium Alginate, Maltodextrin, Methylamido Cellulose Gum, Methylcellulose, Methyl Hydroxyethylcellulose, Methylsilanol Carboxymethyl Theophylline Alginate, Natto Gum, Nonoxynyl Hydroxyethylcellulose, Olibanum, Pectin, Pistacia Lentiscus (Mastic) Gum, Potassium Alginate, Potassium Carrageenan, Potassium, Propylene Glycol Alginate, Prunus Persica (Peach) Gum, Rhizobian Gum, Sclerotium Gum, Sodium Algin Sulfate, Sodium Carboxymethyl Chitin, Sodium Carboxymethyl Dextran, Sodium Carboxymethyl Beta-Glucan, Sodium Carboxymethyl Starch, Sodium Carrageenan, Sodium Cellulose Sulfate, Sodium Polyacrylate Starch, Sodium Stearoxy PG-Hydroxyethylcellulose Sulfonate, Sodium/TEA-Undecylenoyl Alginate, Sodium/TEA-Undecylenoyl Carrageenan, Sterculia Urens Gum, Styrax Benzoin Gum, Tamarindus Indica Seed Gum,TEA-Alginate, Undecylenoyl Xanthan Gum, Welan Gum, and Xanthan Gum. Specific examples of suitable gums for use in the present disclosure include but may not be limilted to Xanthan gum (TICAXAN Xanthan Powder available from TIC), Acacia sennegal gum (Gum Arabic available from TIC), Cellulose Gum (Sigma-Aldrich) and propylene glycol alginate (available from FMC Biopolymer)
Still another suitable example of anti-adherent agents include acrylates and acrylate derivatives. Suitable examples include but are not limited to polyacrylate crosspolymer-11 (ARISTOFLEX VELVET available from Clariant), and Acrylates/Steareth-20 Methacrylate Copolymer (ACULYN 22 available from Dow).
Another class of anti-adherent compounds is polyesters, which are manufactured by polymerizing organic acids and alcohols. Of particular interest are polyesters that are water soluble or dispersible. Specifically, one example is polyester-5 (EASTMAN AQ 38) available from Eastman Chemical Co. Kingsport, Tenn.
Another example of an anti-adherent molecule is Polyimide-1. Polyimide-1 is a terpolymer that is made by reacting poly(isobutylene-alt-maleic anhydride) with dimethylaminopropylamine and methoxy-PEG/PPG-31/9-2-propylamine in a mixture of ethanol and Water (q.v.). The resulting polymer contains both imide, ester, and acid functionality and is used in skin and hair care preparations as a film forming agent.
A further class of anti-adherent molecules is Polyquaternium compounds. Polyquaterniums have been used in cosmetic industry for a long time and are known for their substantivity to hair and skin. In one aspect the anti-adherent property is demonstrated by Polyquaternium-101 (DEPOSILK Q-1) available from Air Products Allenton, Pa.
Another class of anti-adherent compounds is copolymers of PEG, PPG or a combination thereof. Specifically, Poloxamers that are nonionic triblock copolymers composed of a central hydrophobic chain of polyoxypropylene (poly(propylene oxide)) flanked by two hydrophilic chains of polyoxyethylene (poly(ethylene oxide)) fall under this category. Because the lengths of the polymer blocks can be customized, many different poloxamers exist which have slightly different properties. Suitable compounds have an ethylene oxide (EO) and propylene oxide (P0) ratios of: 80% EO/20% PO (PLURONIC F 38 and F 68), 50% EO/50% PO (PLURONIC F 85), 32% EO/68% (PLURONIC L 92), 30% EO/70% PO (PLURONIC P 103 and P 123), 20% EO/80% PO (PLURONIC L 62), and 15% EO/85% PO (PLURONIC L 121).
Another suitable anti-adherent may include a modified silicone having a polyether moeity. As used herein, the term “silicone” generally refers to a broad family of synthetic polymers that have a repeating silicon-oxygen backbone, including, but not limited to, polydimethylsiloxane and polysiloxanes having hydrogen-bonding functional groups selected from the group consisting of amino, carboxyl, hydroxyl, ether, polyether, aldehyde, ketone, amide, ester, and thiol groups.
Generally, any silicone may be used so long as it has a polyether moiety. Examples of polyoxyethylene derivatized dimethicones suitable for use in the compositions of the present disclosure include SILSOFT dimethicones, available from Momentive (Wilton, Conn.), such as SILSOFT 805 (INCI designation: PEG-8 dimethicone; molecular weight: about 10,000); SILSOFT 810 (INCI designation: PEG-8 dimethicone; molecular weight: about 1,700), SILSOFT 840 (INCI designation: PEG-8 dimethicone; molecular weight: about 4,000), SILSOFT 870 (INCI designation: PEG-12 dimethicone; molecular weight: about 2,100), SF1288 (INCI designation: PEG-12 dimethicone); SILSOFT 875 (INCI designation: PEG-12 dimethicone); SILSOFT 880 (INCI designation: PEG-12 dimethicone; molecular weight: about 5,000); SILSOFT 895 (INCI designation: PEG-17 dimethicone; molecular weight: about 5,000), SF1388 (INCI designation: bis-PEG-20 dimethicone). SF1488, SILSOFT 810, SILSOFT 870, and SF1388 are linear polyoxyethylene derivatized dimethicones, while SILSOFT 805, SILSOFT 840, SF1288, SILSOFT 875, SILSOFT 880, and SILSOFT 895 are pendant polyoxyethylene derivatized dimethicones.
The polyoxyethylene derivatized dimethicone may include PEG derivatized dimethicones that have additional moieties added to the polymer, including bis-PEG-15 methyl ether dimethicone, dimethicone PEG-15 acetate, dimethicone PEG-8 benzoate, dimethicone PEG-7 lactate, dimethicone PEG-7 octyldodecyl citrate, dimethicone PEG-7 olivate, dimethicone PEG-8 olivate, dimethicone PEG-7 phosphate, dimethicone PEG-8 phosphate, dimethicone PEG-10 phosphate, dimethicone PEG-7 phthalate, dimethicone PEG-8 phthalate, dimethicone PEG-8 polyacrylate, dimethicone PEG-7 succinate, dimethicone PEG-8 succinate, dimethicone PEG-7 sulfate, dimethicone PEG-7 undecylenate, lauryl dimethicone PEG-10 phosphate, PEG-9 methyl ether dimethicone, PEG-10 methyl ether dimethicone, PEG-11 methyl ether dimethicone, PEG-32 methyl ether dimethicone, PEG-12 methyl ether lauroxy PEG-5 amidopropyl dimethicone, and combinations thereof.
The dimethicone derivative may also be a polyoxyethylene/ polyoxypropylene derivatized dimethicone. As used herein, the term “polyoxyethylene/polyoxypropylene derivatized dimethicone” is meant to include dimethicone polymers comprising a substituted or unsubstituted polyoxyethylene/polyoxypropylene (PEG/PPG) functional group and methicone polymers comprising a substituted or unsubstituted PEG/PPG functional group. Like discussed above with regard to the polyoxyethylene derivatized dimethicones and the polyoxypropylene derivatized dimethicones, the polyoxyethylene/polyoxypropylene derivatized dimethicone may be either pendant or linear. Pendant and linear polyoxyethylene/polyoxypropylene derivatized dimethicones have the same general structures as set forth above for pendant and linear polyoxyethylene derivatized dimethicones, respectively, except R, is a substituted or unsubstituted polyethylene glycol/polypropylene glycol functional group.
Examples of polyoxyethylene/polyoxypropylene derivatized dimethicones suitable for use in the compositions of the present disclosure include SILSOFT dimethicones, available from Momentive (Wilton, Conn.), such as SILSOFT 430 (INCI designation: PEG-20/PPG-23 dimethicone; molecular weight: about 29,000), SF1188A (INCI designation: PEG/PPG 20-15 dimethicone), SILSOFT 440 (INCI designation: PEG-20/PPG-23 dimethicone; molecular weight: about 20,000), and SILSOFT 475 (INCI designation: PEG-23/PPG-6 dimethicone; molecular weight: about 19,000). SILSOFT 430, SF1188A, SILSOFT 440, and SILSOFT 475 are all pendant polyoxyethylene/polyoxypropylene derivatized dimethicones.
Other examples of suitable polyoxyethylene/polyoxypropylene derivatized dimethicones include PEG-3/PPG-10 dimethicone, PEG-4/PPG-12 dimethicone, PEG-6/PPG-11 dimethicone, PEG-8/PPG-14 dimethicone, PEG-8/PPG-26 dimethicone, PEG-10/PPG-2 dimethicone, PEG-12/PPG-16 dimethicone, PEG-12/PPG-18 dimethicone, PEG-14/PPG-4 dimethicone, PEG-15/PPG-15 dimethicone, PEG-16/ PPG-2 dimethicone, PEG-16/PPG-8 dimethicone, PEG-17/PPG-18 dimethicone, PEG-18/PPG-6 dimethicone, PEG-18/PPG-18 dimethicone, PEG-19/PPG-19 dimethicone, PEG- 20/PPG-6 dimethicone, PEG-20/PPG-15 dimethicone, PEG-20/PPG-20 dimethicone, PEG-20/PPG-29 dimethicone, PEG-22/PPG-23 dimethicone, PEG-22/PPG-24 dimethicone, PEG-23/PPG-6 dimethicone, PEG-25/PPG-25 dimethicone, PEG-27/PPG-27 dimethicone, PEG-30/PPG-10 dimethicone, and PPG-4-oleth-10 dimethicone (Le. , PEG-10/PPG-4 dimethicone).
The polyoxyethylene/polyoxypropylene derivatized dimethicone may also include PEG/PPG derivatized dimethicones that have additional moieties added to the polymer, including Bis-PEG-16/PPG-16 PEG-16/PPG-16 dimethicone, dimethicone PEG-20/PPG-23 benzoate, dimethicone PEG-7/PPG-4 phosphate, dimethicone PEG-12/PPG-4 phosphate, PEG-28/PPG-21 acetate dimethicone, PEG/PPG-20/22 butyl ether dimethicone, PEG/PPG-22/22 butyl ether dimethicone, PEG/PPG-23/23 butyl ether dimethicone, PEG-24/PPG-18 butyl ether dimethicone PEG-27/PPG-9 butyl ether dimethicone PEG-24/PPG-24 methyl ether glycidoxy dimethicone, PEG-10/PPG-3 oleyl ether dimethicone, and the like.
Suitable polyoxyethylene/polyoxypropylene derivatized dimethicones include PEG-20/PPG-23 dimethicone, PEG/PPG 20-15 dimethicone, PEG-23/PPG-6 dimethicone, and combinations thereof.
Another suitable anti-adherent agent is a urethane or urethane derivative. Polyurethane is a polymer composed of a chain of organic units joined by carbamate or urethane moieties. Polyisocyanate is typically reacted with various polyols and other functional groups to create a broad range of physcial characteristics and film forming properties. Urethane polymers are rendered hydrophilic by the inclusion of polyethylene glycol or other highly hydrophilic moities. Without being bound to any particular theory, the inclusion of hydrophilic moities, particularly when added in a pendant fashion to the polymer, creates a sphere of hydration in which water molecules are tightly bound to the side chains of the polymer. Unable to remove the water, bacteria are unable to effectively bind to the surface. Also, it may be advantageous to include dimethicone, vinylpyrlidone or acrylate based monomers within the polymer backbone itself to provide substantivity coating to the surface of interest. Particularly useful commercially available polyurethanes for the present disclosure include but are not limited to POLYDERM PE/PA (Polyurethane-18), Polyolprepolymer 15 (PEG-8/SMDI Copolymer), POLYDERM PPI-GH (Glycereth-7 Hydroxystearate/IPDI Copolymer), POLYDERM PPI-CO-40 (PEG-40 Hydrogenated Castor Oil/IPDI), POLYDERM PPI-CO-200 (PEG-200 Hydrogenated Castor Oil/IPDI Copolymer), POLYDERM PPI-SI-WS (Bis-PEG-15 Dimethicone/IPDI Copolymer), POLYDERM PPI-PE (Diethylene Glycol Adipate/IPDI Copolymer), PECOGEL GC-310 (VP/Dimethylaminoethylmethacrylate/Polycarbamyl Polyglycol Ester), PECOGEL H-12 (VP/Polycarbamyl Polyglycol Ester), PECOGEL S-1120(VP/Dimethiconylacrylate/Polycarbamyl/Polyglycol Ester) PECOGEL HS-501(VP/Dimethiconylacrylate/Polycarbamyl/Polyglycol Ester and VP/Polycarbamyl Polyglycol Ester) and SESAFLASH.
Referring to Table 1, anti-adherent agents suitable for use in the present disclosure include hydrophilic film-formers such as cellulosics, gums, acrylates, nonionic polymers, and anionic polymers. Specifically, these could include but not be limited to Hydroxypropyl methylcellulose; Cellulose gum, or Acacia Senegal Gum; a crosspolymer of 2-Acrylamido-2-methylpropane sulfonic acid, N, N-Dimethylacrylamide and acrylic acid such as Polyacrylate Crosspolymer-11; PEG-8 SMDI Copolymer; a non-ionic polymeric film-former such as polyvinyl alcohol; a synthetic polymer such as VP/Dimethylaminoethylmethacrylate/Polycarbamyl Polyglycol Ester, VP/Polycarbamyl Polyglycol Ester, or VP/Dimethiconylacrylate/polycarbamyl Polyglycol Ester; Acrylates/Steareth-20 Methacrylate Copolymer; and an anionic polymeric film former such as a mixture of Acrylates Copolymer and VP/Polycarbamyl Polyglycol Ester, Methylcellulose, hydroxypropylcellulose, hydroxyethylcellulose, Dimethicone PEG-7 Phosphate, Propylene Glycol Alginate, Bis-PEG-15 Dimethicone/IPDI Copolymer, Polyimide-1, Polyquaternium-101, Polyester-5, Hydrolyzed Wheat Protein/PVP Crosspolymer, Polymethacrylamidopropyl Trimonium Chloride, Ethylene Oxide/Propylene Oxide Block Copolymer, Trideceth-9 PG-Amodimethicone (and) Trideceth-12, PEG-12 Dimethicone, Cyclopentasiloxane (and) Caprylyl Dimethicone Ethoxy Glucoside, Dimethicone PEG-8 succinate, Linoleamidopropyl PG-Dimonium Chloride Phosphate Dimethicone, Polyvinyl Pyrrolidone (“PVP”). These anti-adherent agents perform adequately and vary in performance to microbes as shown in Table 2, infra.
The anti-adherent compositions of the present disclosure can be suitably made with an anti-adherent agent in an amount of from about 0.01% (by the total weight of the composition), to about 20% (by total weight of the composition), or from about 0.05% (by total weight of the composition) to about 15% (by total weight of the composition), or from about 0.1% (by total weight of the composition) to about 10% (by total weight of the composition).
The anti-adherent compositions of the present disclosure may be formulated with one or more conventional and compatible carrier materials. The anti-adherent composition may take a variety of forms including, without limitation, aqueous solutions, gels, balms, lotions, suspensions, creams, milks, salves, ointments, sprays, emulsions, oils, resins, foams, solid sticks, aerosols, and the like. Liquid carrier materials suitable for use in the instant disclosure include those well-known for use in the cosmetic and medical arts as a basis for ointments, lotions, creams, salves, aerosols, gels, suspensions, sprays, foams, washes, and the like, and may be used in their established levels.
Non-limiting examples of suitable carrier materials include water, emollients, humectants, polyols, surfactants, esters, silicones, clays, and other pharmaceutically acceptable carrier materials.
In one embodiment, the anti-adherent compositions can optionally include one or more emollients, which typically act to soften, soothe, and otherwise lubricate and/or moisturize the skin. Suitable emollients that can be incorporated into the compositions include oils such as alkyl dimethicones, alkyl methicones, alkyldimethicone copolyols, phenyl silicones, alkyl trimethylsilanes, dimethicone, dimethicone crosspolymers, cyclomethicone, lanolin and its derivatives, fatty esters, glycerol esters and derivatives, propylene glycol esters and derivatives, alkoxylated carboxylic acids, alkoxylated alcohols, fatty alcohols, and combinations thereof.
The anti-adherent compositions may include one or more emollients in an amount of from about 0.01% (by total weight of the composition) to about 20% (by total weight of the composition), or from about 0.05% (by total weight of the composition) to about 10% (by total weight of the composition), or from about 0.10% (by total weight of the composition) to about 5% (by total weight of the composition).
In another embodiment the anti-adherent compositions include one or more esters. The esters may be selected from cetyl palmitate, stearyl palmitate, cetyl stearate, isopropyl laurate, isopropyl myristate, isopropyl palmitate, and combinations thereof. The fatty alcohols include octyldodecanol, lauryl, myristyl, cetyl, stearyl, behenyl alcohol, and combinations thereof. Ethers such as eucalyptol, ceteraryl glucoside, dimethyl isosorbic polyglyceryl-3 cetyl ether, polyglyceryl-3 decyltetradecanol, propylene glycol myristyl ether, and combinations thereof can also suitably be used as emollients. Other suitable ester compounds for use in the anti-adherent compositions or the present disclosure are listed in the International Cosmetic Ingredient Dictionary and Handbook, 11th Edition, CTFA, (January, 2006) ISBN-10:1882621360, ISBN-13: 978-1882621361, and in the 2007 Cosmetic Bench Reference, Allured Pub. Corporation (Jul. 15, 2007) ISBN-10: 1932633278, ISBN-13: 978-1932633276, both of which are incorporated by reference herein to the extent they are consistent herewith.
Humectants that are suitable as carriers in the anti-adherent compositions of the present disclosure include, for example, glycerin, glycerin derivatives, hyaluronic acid, hyaluronic acid derivatives, betaine, betaine derivatives amino acids, amino acid derivatives, glycosaminoglycans, glycols, polyols, sugars, sugar alcohols, hydrogenated starch hydrolysates, hydroxy acids, hydroxy acid derivatives, salts of PCA and the like, and combinations thereof. Specific examples of suitable humectants include honey, sorbitol, hyaluronic acid, sodium hyaluronate, betaine, lactic acid, citric acid, sodium citrate, glycolic acid, sodium glycolate ,sodium lactate, urea, propylene glycol, butylene glycol, pentylene glycol, ethoxydiglycol, methyl gluceth-10, methyl gluceth-20, polyethylene glycols (as listed in the International Cosmetic Ingredient Dictionary and Handbook such as PEG-2 through PEG 10), propanediol, xylitol, maltitol, or combinations thereof. Humectants are beneficial in that they prevent or reduce the chance that the anti-adherent film, formed after the anti-adherent agent is applied to a surface, will crack.
The anti-adherent compositions of the disclosure may include one or more humectants in an amount of about 0.01% (by total weight of the composition) to about 20% (by total weight of the composition), or about 0.05% (by total weight of the composition) to about 10% by total weight of the composition), or about 0.1% (by total weight of the composition) to about 5.0% (by total weight of the composition).
The anti-adherent compositions may include water. For instance, where the anti-adherent composition is a wetting composition, such as described below for use with a wet wipe, the composition will typically include water. The anti-adherent compositions can suitably comprise water in an amount of from about 0.01% (by total weight of the composition) to about 99.98% (by total weight of the composition), or from about 0.05% (by total weight of the composition) to about 95% (by total weight of the composition), or from about 0.10% (by total weight of the composition) to about 90% (by total weight of the composition).
In an embodiment where the anti-adherent composition serves as a wash (e.g. shampoo; surface cleaner; or hand, face, or body wash), the anti-adherent composition will include one or more surfactants. These may be selected from anionic, cationic, nonionic, zwitterionic, and amphoteric surfactants. Amounts may range from 0.1 to 30%, or from 1 to 20%, or from 3 to 15% by total weight of the total composition.
Suitable anionic surfactants include, but are not limited to, C8 to C22 alkane sulfates, ether sulfates and sulfonates. Among the suitable sulfonates are primary C8 to C22 alkane sulfonate, primary C8 to C22 alkane disulfonate, C8 to C22 alkene sulfonate, C8 to C22 hydroxyalkane sulfonate or alkyl glyceryl ether sulfonate. Specific examples of anionic surfactants include ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauric monoglyceride sodium sulfate, sodium lauryl sulfate, sodium laureth sulfate, potassium laureth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, potassium lauryl sulfate, sodium trideceth sulfate, sodium methyl lauroyl taurate, sodium lauroyl isethionate, sodium laureth sulfosuccinate, sodium lauroyl sulfosuccinate, sodium tridecyl benzene sulfonate, sodium dodecyl benzene sulfonate, sodium lauryl amphoacetate and mixtures thereof. Other anionic surfactants include the C8 to C22 acyl glycinate salts. Suitable glycinate salts include sodium cocoylglycinate, potassium cocoylglycinate, sodium lauroylglycinate, potassium lauroylglycinate, sodium myristoylglycinate, potassium myristoylglycinate, sodium palmitoylglycinate, potassium palmitoylglycinate, sodium stearoylglycinate, potassium stearoylglycinate, ammonium cocoylglycinate and mixtures thereof. Cationic counter-ions to form the salt of the glycinate may be selected from sodium, potassium, ammonium, alkanolammonium and mixtures of these cations.
Suitable cationic surfactants include, but are not limited to alkyl dimethylamines, alkyl amidopropylamines, alkyl imidazoline derivatives, quaternised amine ethoxylates, and quaternary ammonium compounds.
Suitable nonionic surfactants include, but are not limited to, alcohols, acids, amides or alkyl phenols reacted with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Specific nonionics are C6 to C22 alkyl phenols-ethylene oxide condensates, the condensation products of C8 to C13 aliphatic primary or secondary linear or branched alcohols with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other nonionics include long chain tertiary amine oxides, long chain tertiary phosphine oxides and dialkyl sulphoxides, alkyl polysaccharides, amine oxides, block copolymers, castor oil ethoxylates, ceto-oleyl alcohol ethoxylates, ceto-stearyl alcohol ethoxylates, decyl alcohol ethoxylates, dinonyl phenol ethoxylates, dodecyl phenol ethoxylates, end-capped ethoxylates, ether amine derivatives, ethoxylated alkanolamides, ethylene glycol esters, fatty acid alkanolamides, fatty alcohol alkoxylates, lauryl alcohol ethoxylates, mono-branched alcohol ethoxylates, natural alcohol ethoxylates, nonyl phenol ethoxylates, octyl phenol ethoxylates, oleyl amine ethoxylates, random copolymer alkoxylates, sorbitan ester ethoxylates, stearic acid ethoxylates, stearyl amine ethoxylates, synthetic alcohol ethoxylates, tall oil fatty acid ethoxylates, tallow amine ethoxylates and trid tridecanol ethoxylates.
Suitable zwitterionic surfactants include, for example, alkyl amine oxides, silicone amine oxides, and combinations thereof. Specific examples of suitable zwitterionic surfactants include, for example, 4-[N,N-di(2-hydroxyethyl)-N-octadecylammonio]-butane-1-carboxylate, S-[S-3-hydroxypropyl-S-hexadecylsulfonio]-3-hydroxypentane-1-sulfate, 3-[P,P-diethyl-P-3,6,9-trioxatetradexopcylphosphonio]-2-hydroxypropane-1-phosphate, 3-[N,N-dipropyl-N-3-dodecoxy-2-hydroxypropylammonio]-propane-1-phosphonate, 3-(N,N-dimethyl-N-hexadecylammonio)propane-1-sulfonate, 3-(N,N-dimethyl-N-hexadecylammonio)-2-hydroxypropane-1-sulfonate, 4-[N,N-di(2-hydroxyethyl)-N-(2-hydroxydodecyl)ammonio]-butane-1-carboxylate, 3-[S-ethyl-S-(3-dodecoxy-2-hydroxypropyl)sulfonio]-propane-1-phosphate, 3-[P,P-dimethyl-P-dodecylphosphonio]-propane-1-phosphonate, 5-[N,N-di(3-hydroxypropyl)-N-hexadecylammonio]-2-hydroxy-pentane-1-sulfate, and combinations thereof.
Suitable amphoteric surfactants include, but are not limited to, derivatives of aliphatic quaternary ammonium, phosphonium, and sulfonium compounds, in which the aliphatic radicals can be straight or branched chain, and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one substituent contains an anionic group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Illustrative amnphoterics are coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine, cocobetaine, oleyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl) carboxymethyl betaine, stearyl bis-(2-hydroxypropyl) carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydroxypropyl)alpha-carboxyethyl betaine, cocoamphoacetates, and combinations thereof. The sulfobetaines may include stearyl dimethyl sulfopropyl betaine, lauryl dimethyl sulfoethyl betaine, lauryl bis-(2-hydroxyethyl) sulfopropyl betaine and combinations thereof.
Optionally, one or more rheology modifiers, such as thickeners, may be added to the anti-adherent compositions. Suitable rheology modifiers are compatible with the anti-adherent agent. As used herein, “compatible” refers to a compound that, when mixed with the anti-adherent agent, does not adversely affect the anti-adherent properties of same.
A thickening system is used in the anti-adherent compositions to adjust the viscosity and stability of the compositions. Specifically, thickening systems prevent the composition from running off of the hands or body during dispensing and use of the composition. When the anti-adherent composition is used with a wipe product, a thicker formulation can be used to prevent the composition from migrating from the wipe substrate.
The thickening system should be compatible with the compounds used in the present disclosure; that is, the thickening system, when used in combination with the anti-adherent compounds, should not precipitate out, form a coacervate, or prevent a user from perceiving the conditioning benefit (or other desired benefit) to be gained from the composition. The thickening system may include a thickener which can provide both the thickening effect desired from the thickening system and a conditioning effect to the user's skin.
Thickeners may include, cellulosics, gums, acrylates, starches and various polymers. Suitable examples include are not limited to hydroxethyl cellulose, xanthan gum, guar gum, potato starch, and corn starch. In some embodiments, PEG-150 stearate, PEG-150 distearate, PEG-175 diisostearate, polyglyceryl-10 behenate/eicosadioate, disteareth-100 IPDI, polyacrylamidomethylpropane sulfonic acid, butylated PVP, and combinations thereof may be suitable.
While the viscosity of the compositions will typically depend on the thickener used and the other components of the compositions, the thickeners of the compositions suitably provide for a composition having a viscosity in the range of greater than 10 cP to about 30,000 cP or more. In another embodiment, the thickeners provide compositions having a viscosity of from about 100 cP to about 20,000 cP. In yet another embodimentthickeners provide compositions having a viscosity of from about 200 cP to about 15,000 cP.
Typically, the anti-adherent compositions of the present disclosure include the thickening system in an amount of no more than about 20% (by total weight of the composition), or from about 0.01% (by total weight of the composition) to about 20% (by total weight of the composition). In another aspect the thickening system is present in the anti-adherent composition in an amount of from about 0.05% (by total weight of the composition) to about 15% (by total weight of the composition), or from about 0.075% (by total weight of the composition) to about 10% (by total weight of the composition), or from about 0.1% (by total weight of the composition) to about 7.5% (by total weight of the composition).
In one embodiment, the anti-adherent compositions are delivered as a foam. In accordance with the present disclosure, in order to make the composition foamable, the composition is combined with a foaming agent such as at least one derivatized dimethicone.
The foaming agent is capable of causing the compositions to foam when the compositions are combined with air using, for instance, a manual pump dispenser. Although the anti-adherent compositions may be dispensed from an aerosol container, an aerosol is not needed in order to cause the compositions to foam. Also of particular advantage, the compositions are foamable without having to include fluorinated surfactants.
Various different derivatized dimethicone foaming agents may be used in the compositions of the present disclosure. The derivatized dimethicone, for instance, may comprise a dimethicone copolyol, such as an ethoxylated dimethicone. In one embodiment, the derivatized dimethicone is linear, although branched dimethicones may be used.
The amount of foaming agent present in the foaming compositions can depend upon various factors and the desired result. In general, the foaming agent can be present in an amount from about 0.01% to about 10% by weight, or from about 0.1% to about 5% by weight, or from about 0.1% to about 2% by weight.
When an anti-adherent composition is made foamable, it may be contained in an aerosol container. In an aerosol container, the composition is maintained under pressure sufficient to cause foam formation when dispensed.
In one embodiment, the anti-adherent compositions may include hydrophobic and hydrophilic ingredients, such as a lotion or cream. Generally, these emulsions have a dispersed phase and a continuous phase, and are generally formed with the addition of a surfactant or a combination of surfactants with varying hydrophilic/lipopiliclipophilic balances (HLB). Suitable emulsifiers include surfactants having HLB values from 0 to 20, or from 2 to 18. Suitable non-limiting examples include Ceteareth-20, Cetearyl Glucoside, Ceteth-10, Ceteth-2, Ceteth-20, Cocamide MEA, Glyceryl Laurate, Glyceryl Stearate, PEG-100 Stearate, Glyceryl Stearate, Glyceryl Stearate SE, Glycol Distearate, Glycol Stearate, lsosteareth-20, Laureth-23, Laureth-4, Lecithin, Methyl Glucose Sesquistearate, Oleth-10, Oleth-2, Oleth-20, PEG-100 Stearate, PEG-20 Almond Glycerides, PEG-20 Methyl Glucose Sesquistearate, PEG-25 Hydrogenated Castor Oil, PEG-30 Dipolyhydroxystearate, PEG-4 Dilaurate, PEG-40 Sorbitan Peroleate, PEG-60 Almond Glycerides, PEG-7 Olivate, PEG-7 Glyceryl Cocoate, PEG-8 Dioleate, PEG-8 Laurate, PEG-8 Oleate, PEG-80 Sorbitan Laurate, Polysorbate 20, Polysorbate 60, Polysorbate 80, Polysorbate 85, Propylene Glycol Isostearate, Sorbitan Isostearate, Sorbitan Laurate, Sorbitan Monostearate, Sorbitan Oleate, Sorbitan Sesquioleate, Sorbitan Stearate, Sorbitan Trioleate, Stearamide MEA, Steareth-100, Steareth-2, Steareth-20, Steareth-21. The compositions can further include surfactants or combinations of surfactants that create liquid crystalline networks or liposomal networks. Suitable non-limiting examples include OLIVEM 1000 (INCI: Cetearyl Olivate (and) Sorbitan Olivate (available from HallStar Company (Chicago, Ill.)); ARLACEL LC (INCI: Sorbitan Stearate (and) Sorbityl Laurate, commercially available from Croda (Edison, N.J.)); CRYSTALCAST MM (INCI: Beta Sitosterol (and) Sucrose Stearate (and) Sucrose Distearate (and) Cetyl Alcohol (and) Stearyl Alcohol, commercially available from MMP Inc. (South Plainfield, N.J.)); UNIOX CRISTAL (INCI: Cetearyl Alcohol (and) Polysorbate 60 (and) Cetearyl Glucoside, commercially available from Chemyunion (Sao Paulo, Brazil)). Other suitable emulsifiers include lecithin, hydrogenated lecithin, lysolecithin, phosphatidylcholine, phospholipids, and combinations thereof.
The anti-adherent compositions of the present disclosure may additionally include adjunct ingredients conventionally found in pharmaceutical compositions in an established fashion and at established levels. For example, the anti-adherent compositions may comprise additional compatible pharmaceutically active and compatible materials for combination therapy, such as antioxidants, anti-parasitic agents, antipruritics, antifungals, antiseptic actives, biological actives, astringents, keratolytic actives, local anaesthetics, anti-stinging agents, anti-reddening agents, skin soothing agents, external analgesics, film formers, skin exfoliating agents, sunscreens, and combinations thereof.
Other suitable additives that may be included in the anti-adherent compositions of the present disclosure include compatible colorants, deodorants, emulsifiers, anti-foaming agents (when foam is not desired), lubricants, skin conditioning agents, skin protectants and skin benefit agents (e.g., aloe vera and tocopheryl acetate), solvents, solubilizing agents, suspending agents, wetting agents, pH adjusting ingredients (a suitable pH range of the compositions can be from about 3.5 to about 8), chelators, propellants, dyes and/or pigments, and combinations thereof.
Another component that may be suitable for addition to the anti-adherent compositions is a fragrance. Any compatible fragrance may be used. Typically, the fragrance is present in an amount from about 0% (by weight of the composition) to about 5% (by weight of the composition), and more typically from about 0.01% (by weight of the composition) to about 3% (by weight of the composition). In one desirable embodiment, the fragrance will have a clean, fresh and/or neutral scent to create an appealing delivery vehicle for the end consumer.
Organic sunscreens that may be present in the anti-adherent compositions include ethylhexyl methoxycinnamate, avobenzone, octocrylene, benzophenone-4, phenylbenzimidazole sulfonic acid, homosalate, oxybenzone, benzophenone-3, ethylhexyl salicylate, and mixtures thereof.
Antimicrobial agents may be added to the anti-adherent compositions. For example, suitable antimicrobials include biocides such as a short-chain alcohol, benzoalkonium chloride (“BAC”), didecyl dimethyl ammonium chloride (“DDAC”), and zeolite (“CWT-A”). Other possible antimicrobial agents include: isothiazolone, alkyl dimethyl ammonium chloride, a triazine, 2-thiocyanomethylthio benzothiazol, methylene bis thiocyanate, acrolein, dodecylguanidine hydrochloride, a chlorophenol, a quaternary ammonium salt, gluteraldehyde, a dithiocarbamate, 2-mercatobenzothiazole, para-chloro-meta-xylenol, silver, chlorohexidine, polyhexamthylene biguanide, a n-halamine, triclosan, a phospholipid, an alpha hydroxyl acid, 2,2-dibromo-3-nitrilopropionamide, 2-bromo-2-nitro-1,3-propanediol, farnesol, iodine, bromine, hydrogen peroxide, chlorine dioxide, a botanical oil, a botanical extract, benzalkonium chloride, chlorine, sodium hypochlorite, or combinations thereof.
When present, the amount of the antimicrobial agent in the anti-adherent compositions is in an amount between about 0.01% to about 5% (by total weight of the composition), or in some embodiments between about 0.05 to about 3% (by total weight of the composition).
The anti-adherent compositions may include various preservatives to increase shelf life. Some suitable preservatives that may be used in the present disclosure include, but are not limited to phenoxyethanol, capryl glycol, glyceryl caprylate, sorbic acid, gallic acid, KATHON CG.RTM., which is a mixture of methylchloroisothiazolinone and methylisothiazolinone, (available from Rohm & Haas Company, Philadelphia, Pa.); DMDM hydantoin (e.g., GLYDANT, available from Lonza, Inc., Fair Lawn, N.J.); EDTA and salts thereof; iodopropynyl butylcarbamate; benzoic esters (parabens), such as methylparaben, propylparaben, butylparaben, ethylparaben, isopropylparaben, isobutylparaben, benzylparaben, sodium methylparaben, and sodium propylparaben; 2-bromo-2-nitropropane-1,3-diol; benzoic acid; and the like. Other suitable preservatives include those sold by Sutton Labs Inc., Chatham, N.J., such as “GERMALL 115” (imidazolidinyl urea), “GERMALL II” (diazolidinyl urea), and “GERMALL PLUS” (diazolidinyl urea and iodopropynyl butylcarbonate).
The amount of the preservative in the anti-adherent compositions is dependent on the relative amounts of other components present within the composition. For example, in some embodiments, the preservative is present in the compositions in an amount between about 0.001% to about 5% (by total weight of the composition), in some embodiments between about 0.01 to about 3% (by total weight of the composition), and in some embodiments, between about 0.05% to about 1.0% (by total weight of the composition).
The anti-adherent compositions of the present disclosure may be prepared by combining ingredients at room temperature and mixing.
In one embodiment, when the anti-adherent composition is to be applied to the skin of an individual, the composition includes the anti-adherent agent, a hydrophilic carrier and a hydrophilic thickener. Suitable hydrophilic carriers can be, for example, water, glycerin, glycerin derivatives, glycols, water-soluble emollients, and combinations thereof. Suitable examples of glycerin derivatives could include, but are not to be limited to, PEG-7 glyceryl cocoate. Suitable glycols could include, but are not to be limited to, propylene glycol, butylene glycol, pentylene glycol, ethoxydiglycol, dipropylene glycol, propanediol, and PEG-8. Suitable examples of water-soluble emollients could include, but are not to be limited to, PEG-6 Caprylic Capric Glycerides, Hydrolyzed Jojoba Esters, and PEG-10 Sunflower Glycerides.
The anti-adherent compositions of the present disclosure may be used in combination with a product. For example, the composition may be incorporated into or onto a substrate, such as a wipe substrate, an absorbent substrate, a fabric or cloth substrate, a tissue or paper towel substrate, or the like. In one embodiment, the anti-adherent composition may be used in combination with a wipe substrate to form a wet wipe or may be a wetting composition for use in combination with a wipe which may be dispersible. In other embodiments, the anti-adherent composition may be incorporated into wipes such as wet wipes, hand wipes, face wipes, cosmetic wipes, cloths and the like. In yet other embodiments, the anti-adherent compositions described herein can be used in combination with numerous personal care products, such as absorbent articles. Absorbent articles of interest are diapers, training pants, adult incontinence products, feminine hygiene products, and the like; bath or facial tissue; and paper towels. Personal protective equipment articles of interest include but are not limited to masks, gowns, gloves, caps, and the like.
In one embodiment, the wet wipe may comprise a nonwoven material that is wetted with an aqueous solution termed the “wetting composition,” which may include or be composed entirely of the anti-adherent compositions disclosed herein. As used herein, the nonwoven material comprises a fibrous material or substrate, where the fibrous material or substrate comprises a sheet that has a structure of individual fibers or filaments randomly arranged in a mat-like fashion. Nonwoven materials may be made from a variety of processes including, but not limited to, airlaid processes, wet-laid processes such as with cellulosic-based tissues or towels, hydroentangling processes, staple fiber carding and bonding, melt blown, and solution spinning.
The fibers forming the fibrous material may be made from a variety of materials including natural fibers, synthetic fibers, and combinations thereof. The choice of fibers may depend upon, for example, the intended end use of the finished substrate and the fiber cost. For instance, suitable fibers may include, but are not limited to, natural fibers such as cotton, linen, jute, hemp, wool, wood pulp, etc. Similarly, suitable fibers may also include: regenerated cellulosic fibers, such as viscose rayon and cuprammonium rayon; modified cellulosic fibers, such as cellulose acetate; or synthetic fibers, such as those derived from polypropylenes, polyethylenes, polyolefins, polyesters, polyamides, polyacrylics, etc. Regenerated cellulose fibers, as briefly discussed above, include rayon in all its varieties as well as other fibers derived from viscose or chemically modified cellulose, including regenerated cellulose and solvent-spun cellulose, such as Lyocell. Among wood pulp fibers, any known papermaking fibers may be used, including softwood and hardwood fibers. Fibers, for example, may be chemically pulped or mechanically pulped, bleached or unbleached, virgin or recycled, high yield or low yield, and the like. Chemically treated natural cellulosic fibers may be used, such as mercerized pulps, chemically stiffened or crosslinked fibers, or sulfonated fibers.
In addition, cellulose produced by microbes and other cellulosic derivatives may be used. As used herein, the term “cellulosic” is meant to include any material having cellulose as a major constituent, and, specifically, comprising at least 50 percent by weight cellulose or a cellulose derivative. Thus, the term includes cotton, typical wood pulps, non-woody cellulosic fibers, cellulose acetate, cellulose triacetate, rayon, thermomechanical wood pulp, chemical wood pulp, debonded chemical wood pulp, milkweed, or bacterial cellulose. Blends of one or more of any of the previously described fibers may also be used, if so desired.
The fibrous material may be formed from a single layer or multiple layers. In the case of multiple layers, the layers are generally positioned in a juxtaposed or surface-to-surface relationship and all or a portion of the layers may be bound to adjacent layers. The fibrous material may also be formed from a plurality of separate fibrous materials wherein each of the separate fibrous materials may be formed from a different type of fiber.
Airlaid nonwoven fabrics are particularly well suited for use as wet wipes. The basis weights for airlaid nonwoven fabrics may range from about 20 to about 200 grams per square meter (gsm) with staple fibers having a denier of about 0.5 to about 10 and a length of about 6 to about 15 millimeters. Wet wipes may generally have a fiber density of about 0.025 g/cc to about 0.2 g/cc. Wet wipes may generally have a basis weight of about 20 gsm to about 150 gsm. More desirably the basis weight may be from about 30 to about 90 gsm. Even more desirably the basis weight may be from about 50 gsm to about 75 gsm.
Processes for producing airlaid non-woven basesheets are described in, for example, published U.S. Pat. App. No. 2006/0008621, herein incorporated by reference to the extent it is consistent herewith.
The disclosure will be more fully understood upon consideration of the following non-limiting Examples.
The anti-adherent compounds affect bacterial adherence to MBEC polystyrene pegs (see explanation below) in three different ways: 1) anti-adherent compounds have a greater than or equal to 1 Log reduction of bacteria to the pegs, 2) neutral compounds have between 0.9 Log reduction of bacteria to the pegs and 0.9 Log increase of bacteria on the pegs, 3) adherent compounds have a greater than or equal to 1 Log increase of bacteria on the pegs. No compounds with anti-adherent activity were found to be antimicrobial (data not shown). In this example, anti-adherent compositions of the present disclosure were tested using the High Throughput Anti-adherence Test Method, infra, against Gram-positive Staphylococcus aureus, and Gram-negative Escherichia coli. Eleven of the seventy-one compounds tested were found to be anti-adherent against Gram-positive S. aureus, and Gram-negative E. coli. The anti-adherent compounds are shown in Table 2 below.
The pH of the anti-adherent composition is between 3 to 10 pH, or about 4 to about 8 pH.
E. coli
S. aureus
E. coli
S. aureus
Multiple compositions were prepared with varying combinations of anti-adherent agents, as displayed in Table 3. Agents were added and mixed into a constant quantity of Ethanol and Glycerin with the remaining balance of each composition consisting of water to a total of 100% w/w. All of the compositions in Table 3 were then tested for anti-adherence against Gram− and Gram+ microbes using the Viable Count Anti-Adherence Test Method. As can be seen in the table, all of the compositions reduced the adherence of microbes on the surface tested by at least 0.5 LOG according to the Viable Count Anti-Adherence Test Method.
This test method specifies the operational parameters required to grow and or prevent the formation of bacterial attachment using a high throughput screening assay. The assay device consists of a plastic lid with ninety-six (96) pegs and a corresponding receiver plate with ninety-six (96) individual wells that have a maximum 200 μL working volume. Biofilm is established on the pegs under static batch conditions (i.e., no flow of nutrients into or out of an individual well).
1. Terminology
2. Acronyms
3. Apparatus
4. Reagents and Materials
4.6 Phosphate Buffered Saline (PBS)—
5. Microorganisms
6. Test Method overview: The experimental process for the High-Throughput Anti-Adherence Test Method. This standard protocol may be broken into a series of small steps, each of which is detailed in the sections below.
E. coli
E. coli
E. coli
E. coli
S. aureus
S. aureus
S. aureus
S. aureus
7.1 Bacterial Adherence Challenge:
7.2 Method to Determine Number of Attached Bacteria
7.3 Method for Generating a Standard Curve with bacteria in an ALAMARBLUE Solution:
7.3.4.6 Plate appropriate dilutions of prepared bacteria.
This test method specifies the operational parameters required to grow and or prevent the formation of bacterial attachment using viable counts. The assay device consists of a plastic lid with ninety-six (96) pegs and a corresponding receiver plate with ninety-six (96) individual wells that have a maximum 200 μL working volume. Biofilm is established on the pegs under static batch conditions (i.e., no flow of nutrients into or out of an individual well).
This test method is identical to the High Throughput Anti-Adherence Test Method except that Section 7.1 through 7.3.4.13 is replaced with the following:
A. Bacterial Adherence Challenge:
B. Recovery:
C. LOG10 Reduction:
Log10(CFU/peg)=Log10[(X/B)(D)] where:
The compositions of the present disclosure exhibit a decrease of bacteria on surfaces. Log decrease, for example, may be determined from the decrease of bacteria adhered to a surface according to the following correlations:
In other words, surface exhibiting a decrease of bacteria of 1 Log means the number of bacteria on the fibrous substrate has decreased 10-fold, a decrease of 2 Log means the number of bacteria has decreased 100-fold, a decrease of 3 Log means the number of bacteria has decreased 1000-fold, etc., as compared to the number of bacteria present on a surface that is not treated with the disclosed composition. A larger Log decrease thus corresponds with a composition that is able to more effectively repel Gram negative and Gram positive bacteria.
When introducing elements of the present disclosure, 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 inclusive and mean that there may be additional elements other than the listed elements. Many modifications and variations of the present disclosure can be made without departing from the spirit and scope thereof. Therefore, the exemplary embodiments described above should not be used to limit the scope of the disclosure.
| Number | Date | Country | |
|---|---|---|---|
| 62031757 | Jul 2014 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15329799 | Jan 2017 | US |
| Child | 16943190 | US |
