Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/42—Amides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0295—Liquid crystals
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
  • A61K8/345—Alcohols containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
  • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/37—Esters of carboxylic acids
  • A61K8/375—Esters of carboxylic acids the alcohol moiety containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/41—Amines
  • A61K8/416—Quaternary ammonium compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
  • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/12—Preparations containing hair conditioners

Definitions

• This invention relates to compositions for personal care formulations, and, more particularly, to a cationic product-structurant composition which forms a bilayer lamellar gel network in an oil-in-water system, thereby to provide a skin feel of lubricity and emollience, skin conditioning, and skin barrier strengthening which brings moisturization to the user without added moisturizer, sun protection through uniform delivery of active sunscreens, and provision of a uniform color from a liquid make-up formulation, as well as effective hair conditioning.
• stratum corneum Human body skin forms a barrier which protects the body against uncontrolled loss of water.
• stratum corneum provides this barrier.
• stratum corneum has been described as a bricks-and-mortar structure in which the corneocyte "bricks" are surrounded by lipid “mortar”.
• the lipid region is known to provide the semi-permeability barrier needed for healthy skin, and the physical organization of the lipids is known to be critical for good barrier function.
• Skin lipids have been the subject of much research in recent years, and the relatively simple "mortar” model has recently evolved into a more complex "Domain Mosaic Model” (DMM). In this model, skin lipids are described as having domains of solid or gel-state lipids bordered by lipids in a more fluid liquid crystalline state called a "grain boundary".
• a DMM arrangement provides an effective barrier that prevents the indiscriminate loss of water, yet allows controlled evaporation to regulate body temperature.
• the more fluid character of the grain boundaries represents areas where materials may diffuse in or out of the system.
• any loss of lipid can disrupt the barrier function of the stratum corneum. Healthy skin thus requires optimal barrier function and maintenance of skin moisture for prevention of irritation and dryness.
• Lipid loss can arise due to excess washing, exposure to cold and dry climates, or dietary unbalance. Lipid depletion eventually causes a weakened, more permeable barrier which readily loses moisture, resulting in rough, dry skin. A permeable barrier also is more readily penetrated by foreign materials which can cause effect adverse reactions in sensitive skin.
• Lipids may be replenished by topical application of a skin care formulation.
• barrier function is to be rapidly restored, preferably in a bilayer lamellar gel network which approximate the structure of lipids within the stratum corneum.
• Such bilayer lamellar gel networks also can provide product-structuring of oil-in-water emulsions by formation of multilayer vesicles with the oil phase and extended bilayer sheets throughout the water phase which eliminates the need for application of conventional emulsifiers that do not provide any benefit to the skin. Conner et al in U.S. Pat.
• a cationic skin conditioning agent and product-structuring or emulsion compositions therewith, in the form of a cationic bilayer lamellar gel network which approximates the natural structure of the stratum corneum lipids and is stable to temperatures up to 80°C, wherein the cationic (negative charged) lamellar gel is strongly attracted to human skin, so that the charge interaction between the skin and the lamellar gel provides excellent skin coverage, effective skin conditioning, and long-lasting barrier enhancement.
• Yet another object herein is to provide skin care formulations including such cationic bilayer lamellar gel network compositions and resulting emulsion formulations, having a skin feel of lubricity and emollience, and which provides moisturization without added moisturizer, and which can deliver active sunscreens to the skin surface by the cationic bilayer lamellar gel network system thus providing excellent, long-lasting photoprotection.
• a particular object herein is to provide product-structuring or emulsion compositions and skin care formulations therewith whose skin feel is moist and substantive in their skin feel after use.
• a product-structuring composition which will form a bilayer lamellar gel network in an oil-in-water system comprising (a) a cationic swellant which is a fatty acid adduct of amidopropyldimethyl-2- hydroxyethyl ammonium halide, and (b) a gellant blend of low HLB emulsifiers having a resultant HLB of about 1.5 to 4.5.
• the composition includes a saturated fatty acid such as stearic or palmitic acid, or mixtures thereof, suitably present in an amount, by weight, of about 0.5 to 5% of the composition and (b) being the remainder 100%.
• a saturated fatty acid such as stearic or palmitic acid, or mixtures thereof, suitably present in an amount, by weight, of about 0.5 to 5% of the composition and (b) being the remainder 100%.
• (b) includes a group of emulsifiers having a non-ionizable group selected from fatty alcohols and esters, optionally with an ionizable emulsifier which is a fatty acid, particularly wherein said fatty alcohol is behenyl alcohol and said fatty ester is glycerol stearate or sorbitan monostearate, or mixtures thereof, in a weight ratio of fatty ester to fatty alcohol of about 2:1 to about 1.6:1 , and the weight ratio of saturated fatty acid emulsifier to (a) is about 2: 1 to about 4: 1.
• a group of emulsifiers having a non-ionizable group selected from fatty alcohols and esters optionally with an ionizable emulsifier which is a fatty acid, particularly wherein said fatty alcohol is behenyl alcohol and said fatty ester is glycerol stearate or sorbitan monostearate, or mixtures thereof, in a weight
• a preferred composition is wherein (b) comprises by weight, about 30-60% glycerol stearate, about 25-50% cetyl alcohol, about 3-8% behenyl alcohol and about 2-8% of a mixture of palmitic and stearic acids.
• the swellant in the product-structuring composition of the invention is the reaction product of a fatty acid, preferably a saturated fatty acid, e.g. palmitic/stearic acid, and dimethyl aminopropyl amine and epichlorohydrin, which is a cationic quaternary compound, e.g. palmityl/stearyl amidopropyl dimethyl 2-hydroxyethyl ammonium chloride.
• a suitable non-volatile solvent preferably an oil soluble solvent, at a suitable temperature.
• Preferred solvents for use herein are fatty alcohols which are oil soluble, such as stearyl alcohol, behenyl alcohol and cetyl alcohol.
• the bilayer lamellar gel network product-structuring composition of the invention is a mixture of such cationic quaternary conditioning agent, i.e. the saturated fatty acid adduct of amidopropyl dimethyl 2-hydroxyethyl ammonium chloride, in a weight amount of about 0.5 to 5%, preferably about 0.75 to 3%, and, optimally about 1 to 2%, and a blend of low HLB emulsifiers, to 100%.
• the blend of low HLB emulsifiers has a resultant HLB of about 1.5 to 4.5, preferably about 2 to 4, and, optimally about 2.7 to 3.2.
• the weight ratio of ester to fatty alcohol is about 2:1 to about 1.6 to 1.
• an ionizable emulsifier such as a fatty acid may be added to provide compatibility with anionic thickeners.
• the weight ratio of the fatty acid e.g.
• stearic/palmitic acid, to the cationic quaternary conditioning agent is about 2:1 to about 4 to 1.
• a personal care formulation is made by including about 2-8% by weight, preferably 3-6%, of the product-structurant composition in the formulation.
• the gellant in such composition comprises about 30-60% glycerol stearate, about 25-50% cetearyl alcohol, about 3-8% behenyl alcohol, and about 2-8% of a mixture of palmitic and stearic acids.
• the gel network formed by the product-structuring composition of the invention begins a phase transition above 45°C in most emulsion products. Therefore, to ensure high temperature stability for the skin care formulation, it is preferred to add a small amount of a hydrocolloid thickener such as Stabileze QM® (International Specialty Products), which is a crosslinked methyl vinyl ether/maleic anhydride copolymer.
• a hydrocolloid thickener such as Stabileze QM® (International Specialty Products), which is a crosslinked methyl vinyl ether/maleic anhydride copolymer.
• the skin care formulations, and product-structuring composition therefor provides the user with a skin feel of lubricity and emollience, as well as moisturization without added moisturizer.
• fatty acids and alcohols refers to compounds having from 12-26 carbon atoms.
• cationic bilayer lamellar gel network product-structurant compositions of Examples 1-5 were prepared by melting the components, mixing thoroughly, and cooling to room temperature.
• Example 6 was repeated except that 252.2 g of behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, palmitic amidopropyl dimethyl 2-hydroxy-ethyl ammonium chloride and cetearyl alcohol were recovered as pale yellow flakes.
• Example 6 was repeated except that 37.5 g of 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, palmitic amidopropyl dimethyl 2-hydroxy-ethyi ammonium bromide and cetearyl alcohol were recovered as pale yellow flakes.
• Example 6 was repeated except that 51.6 g of 2-iodoethanol was substituted for 2-chloro-ethanol.
• the corresponding product, palmitic amidopropyl dimethyl 2-hydroxyethyl ammonium iodide and cetearyl alcohol were recovered as pale yellow flakes.
• Example 6 was repeated except that 15.5 g of 2-fluoroethanol was substituted for 2-chloroethanol.
• the corresponding product, palmitic amidopropyl dimethyl 2-hydroxy-ethyl ammonium fluoride and cetearyl alcohol were recovered as pale yellow flakes.
• Example 6 was repeated except that 85.2 g stearic acid was substituted for palmitic acid.
• the corresponding product, stearic amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and cetearyl alcohol were recovered as pale yellow flakes.
• Example 11 was repeated except that 252.2 g behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, stearic amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and behenyl alcohol were recovered as pale yellow flakes.
• Example 11 was repeated except that 37.5 g of 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, stearic amidopropyl dimethyl 2-hydroxyethyl ammonium bromide and cetearyl alcohol were recovered as pale yellow flakes.
• Example 11 was repeated except that 51.6 g of 2-iodoethanol was substituted for 2-chloro-ethanol.
• the corresponding product, stearic amidopropyl dimethyl 2-hydroxyethyl ammonium iodide and cetearyl alcohol were recovered as pale yellow flakes.
• Example 16 Using the equipment of Example 1 , 89.3 g of ricebran oil, 10.2 g of DMAPA and 0.2 g sodium hydroxide were charged. The resulting mixture was agitated at 140°C for 4 hours. After completion of amidation, excess DMAPA was removed by vacuum. The batch was cooled down to room temperature, 247.2 g of cetearyl alcohol was charged, along with 24.1 g of 2-chloroethanol. The resulting mixture was agitated at 140°C for 4 hours. Upon completion, the product is flaked at 80°C to give a yellow material as ricebran amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and cetearyl alcohol. EXAMPLE 16
• Example 15 was repeated except that 37.5 g 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, ricebran amidopropyl dimethyl 2-hydroxy-ethyl ammonium bromide and cetearyl alcohol were recovered as yellow flakes.
• Example 15 was repeated except that 247.2 g behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, ricebran amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and behenyl alcohol were recovered as pale yellow flakes.
• Example 15 was repeated except that 88.1 g safflower oil was substituted for ricebran oil.
• the corresponding product, safflower amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and cetearyl alcohol were recovered as yellow flakes.
• Example 18 was repeated except that 247.2 g behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, safflower amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and behenyl alcohol were recovered as yellow flakes.
• Example 18 was repeated except that 37.5 g 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, safflower amidopropyl dimethyl 2-hydroxy-ethyl ammonium bromide and cetearyl alcohol were recovered as yellow flakes.
• Example 15 was repeated except that 87.7 g soybean oil was substituted for ricebran oil.
• the corresponding product, soybean amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and cetearyl alcohol were recovered as yellow flakes.
• Example 21 was repeated except that 247.2 g behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, soybean amidopropyl dimethyl 2-hydroxy-ethyl ammonium chloride and behenyl alcohol were recovered as yellow flakes.
• Example 21 was repeated except that 37.5 g 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, soybean amidopropyl dimethyl 2-hydroxy-ethyl ammonium bromide and cetearyl alcohol were recovered as yellow flakes.
• Example 15 was repeated except that 84.2 g palm oil was substituted for ricebran oil.
• the corresponding product, palm amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and cetearyl alcohol were recovered as yellow flakes.
• Example 24 was repeated except that 247.2 g behenyl alcohol was substituted for cetearyl alcohol.
• the corresponding product, palm amidopropyl dimethyl 2-hydroxyethyl ammonium chloride and behenyl alcohol were recovered as yellow flakes.
• Example 24 was repeated except that 37.5 g 2-bromoethanol was substituted for 2-chloroethanol.
• the corresponding product, palm amidopropyl dimethyl 2-hydroxy-ethyl ammonium bromide and cetearyl alcohol were recovered as yellow flakes.
• phase A Wet gum with glycerin. Slowly add glycerin mixture to phase A with stirring at room temperature. Heat phase A to 70-75°C. Separately, combine phase B, then heat to 75-80°C. When both phase A and phase B are at temperature, add phase B to phase A with homogenization until batch appears uniform. Continue homogenization and remove heat. Switch to sweep stirring at 40°C. Add phase C at 35-40°C. Make up for lost water and stir until room temperature.
• Skin care formulations C, D and E provide the user with a skin feel of lubricity and emollience, and provide moisturization without added moisturizer.
• phase A Wet gum with glycerin. Slowly add glycerin mixture to phase A with stirring at room temperature. Heat phase A to 70-75°C. Separately, combine phase B, then heat to 75-80°C. When both phase A and phase B are at temperature, add phase B to phase A with homogenization until batch appears uniform. Continue homogenization and remove heat. Switch to sweep stirring at 50°C. Add phase C at 45°C. Add phase D at 35-40°C. Make up for lost water and stir until room temperature.
• Skin care formulations F and G provide the user with a skin feel of moistness, lubricity and emollience, and provide superior moisturization.
• phase A Combine water, EDTA, and glycerin of phase A. Slowly sprinkle either Carbopol 940 into phase A with stirring at room temperature. Heat phase A to 70-75°C. Separately, combine phase B, then heat to 75-80°C. When both phase A and phase B are at temperature, add phase B to phase A with homogenization until batch appears uniform. Continue homogenization for 2 minutes while adding phase C. Remove heat and switch to sweep agitation when batch becomes too thick for homogenizer. Add phase D at 35-40°C. Make up for lost water and stir until room temperature.
• Composition H provides excellent, water-resistant SPF protection with a smooth, non-oily and non-greasy skin feel after application.

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• 1999
  • 1999-09-14 US US09/395,382 patent/US6368607B1/en not_active Expired - Lifetime
• 2000
  • 2000-04-11 CN CNB008153981A patent/CN1201727C/zh not_active Expired - Fee Related
  • 2000-04-11 WO PCT/US2000/009564 patent/WO2001019343A1/en active IP Right Grant
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