EP0268164A2
Expired / Lapsed
EP
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Stable and quick-breaking topical skin compositions
Assignee: Goodrich Corp
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Filing: 1987-11-06
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Granted: —
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Expires: 2007-11-06
Abstract
Abstract This invention relates to stable oil-in-water emulsions and to products based on such emulsions which contain a modified polymer which is a copolymer of a preponderant amount of an acrylic acid and a smaller amount of a long chain acrylate monomer which modified polymer renders the emulsions stable for over a year at room temperature and which imparts to the emulsions the quick breaking property whereby the emulsions break on coming in contact with an electrolyte or skin, instantaneously coalescing and releasing oil from the emulsions.
Inventors
- 👤 Robert Yeats Lochhead
- 👤 Janet Yvonne Castaneda
- 👤 Wilfried James Hemker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/30; A61K47/32; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/062; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; A61Q; A61Q17/00; A61Q17/04; A61Q19/00; A61Q19/002; A61Q19/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A storage-stable, quick-breaking oil-in-water emulsion composition comprising water, oil, and a modified polymer wherein in said emulsion, water forms the continuous phase and oil forms the discontinuous phase in the form of oil droplets dispersed in the water, said modified polymer is a copolymer of a major portion of a monoolefinically unsaturated carboxylic acid monomer or its anhydride of 3 to 6 carbon atoms and a minor portion of a long chain acrylate ester monomer, said emulsion has the characteristic of breaking quickly on contact with an electrolyte.
Claim 2
Dependent Claim
88 words
A storage-stable, quick-breaking oil-in-water emulsion composition comprising water, oil, and a modified polymer wherein in said emulsion, water forms the continuous phase and oil forms the discontinuous phase in the form of oil droplets dispersed in the water, said modified polymer is a copolymer of a major portion of a monoolefinically unsaturated carboxylic acid monomer or its anhydride of 3 to 6 carbon atoms and a minor portion of a long chain acrylate ester monomer, said emulsion has the characteristic of breaking quickly on contact with an electrolyte.
Claim 3
Dependent Claim
31 words
Composition of claim 1 wherein amount of said acid monomer or its anhydride is 90 to 98% by weight and amount of said ester monomer is 10 to 2% by weight.
Claim 4
Dependent Claim
69 words
Composition of claim 2 wherein said acid monomer is defined as follows: CH₂= -COOH where R is selected from hydrogen, halogen, hydroxyl, lactone, lactam, and cyanogen (-C≡N) groups, and monovalent alkyl, aryl, aralkyl, alkaryl, and cycloaliphatic groups, and wherein said ester monomer is defined as follows: Where R¹ is selected from hydrogen, methyl and ethyl groups and R² is selected from alkyl groups of 8 to 30 carbon atoms.
Claim 5
Dependent Claim
49 words
Composition of claim 3 wherein said acid monomer is selected from acrylic acid, methacrylic acid, and mixtures thereof; and said ester monomer is selected from acrylate esters where R¹ is selected from hydrogen and methyl groups and R² is selected from alkyl groups of 10 to 22 carbon atoms.
Claim 6
Dependent Claim
62 words
Composition of claim 4 which has pH of 4 to 6 and which is devoid of surfactants other than said modified polymer wherein amount of oil is 0.5 to 50 parts, amount of said modified polymer is 0.1 to 1 part, and amount of water is remainder to 100 weight parts, based on the combined amounts of oil, modified polymer, and water.
Claim 7
Dependent Claim
36 words
Composition of claim 2 which contains the following components, given below in weight parts: Mineral Oil 2 to 25 Modified Polymer 0.1 to 0.5 Neutralizing Agent 0.05 to 1.0 Water - Balance to 100 weight parts.
Claim 8
Dependent Claim
75 words
Composition of claim 2 which is stable at pH below about 6 and which contains the following components, given below in weight parts: Mineral Oil 0 to 30 Silicone Oil 0 to 30 Modified Polymer 0.1 to 0.5 Neutralizing Agent 0.05 to 1.0 Water - Balance to 100 weight parts provided that the above composition contains at least 2 weight parts of mineral oil, or silicone oil, or a mixture of mineral and silicone oil.
Claim 9
Dependent Claim
50 words
Composition of claim 2 which is stable at pH below about 6 and which contains the following components, given below in weight parts: Mineral Spirits 10 to 40 Modified Polymer 0.1 to 1.0 Neutralizing Agent 0.05 to 2.5 Hydrophilic Surfactant 0.5 to 5 Water - Balance to 100 weight parts.
Claim 10
Dependent Claim
58 words
Composition of claim 2 which is shelf-stable at pH below about 6 at about 20°C for at least one year and which contains the following components, given below in weight parts: Mineral Oil 2 to 35 Modified Polymer 0.1 to 0.5 Neutralizing Agent 0.05 to 1.0 Sunscreen Agent 0.5 to 20 Water - Balance to 100 weight parts.
Claim 11
Dependent Claim
29 words
Composition of claim 1 wherein said copolymer also contains polymerized therein a major portion of a lower alkyl ester of acrylic acid, methacrylic acid, and mixtures of such esters.
References Cited (Backward Citations)
No citation records indexed.
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