US5229435A
Expired / Lapsed
US
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Skin-protecting composition
Assignee: Nissin Chemical Industry Co Ltd
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Filing: 1990-04-02
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Granted: 1993-07-20
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Expires: 2010-04-02
Abstract
Abstract A skin-protecting composition which comprises a silicone-acrylic copolymer which comprises (A) 1 to 15% by weight of a silicon-containing monomer, (B) 30 to 70% by weight of an alkyl acrylate, (C) 0 to 30% by weight of an alkyl methacrylate, and (D) 5 to 45% by weight of a mono-ethylenically unsaturated monomer having a carboxyl group, and a medium, which can effectively block irritative materials and be easily removed from a skin.
Inventors
- 👤 Yoshio Sakai
- 👤 Izumi Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/895; A61Q; A61Q17/00; A61K2800/00; A61K2800/74; A61K2800/75
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
177 words
A skin-protecting composition which comprises an uncrosslinked silicone-acrylic copolymer which comprises (A) 1 to 15% by weight of a silicon-containing monomer of the formula: ##STR7## wherein X is a radically polymerizable group; R 1 groups are the same or different and each a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group or a group Y of the formula: ##STR8## in which R 3 groups are the same or different and each a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group, p is a number of 5 to 100, provided that the number of the Y group among the R 1 groups is 0, 1 or 2; R 2 is a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group; m is a number of 1 to 10; and n is a number of 5 to 100, (B) 30 to 70% by weight of an alkyl acrylate, (C) 0 to 30% by weight of an alkyl methacrylate, and (D) 5 to 45% by weight of a mono-ethylenically unsaturated monomer having a carboxyl group, and a medium.
Claim 2
Dependent Claim
177 words
A skin-protecting composition which comprises an uncrosslinked silicone-acrylic copolymer which comprises (A) 1 to 15% by weight of a silicon-containing monomer of the formula: ##STR7## wherein X is a radically polymerizable group; R 1 groups are the same or different and each a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group or a group Y of the formula: ##STR8## in which R 3 groups are the same or different and each a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group, p is a number of 5 to 100, provided that the number of the Y group among the R 1 groups is 0, 1 or 2; R 2 is a C 1 -C 20 hydrocarbon or halogenated hydrocarbon group; m is a number of 1 to 10; and n is a number of 5 to 100, (B) 30 to 70% by weight of an alkyl acrylate, (C) 0 to 30% by weight of an alkyl methacrylate, and (D) 5 to 45% by weight of a mono-ethylenically unsaturated monomer having a carboxyl group, and a medium.
Claim 3
Dependent Claim
20 words
The skin-protecting composition according to claim 1, wherein the silicon-containing compound (A) is selected from the group consisting of ##STR9##
Claim 4
Dependent Claim
26 words
The skin-protecting composition according to claim 1, wherein the alkyl acrylate (B) is selected from the group consisting of ethyl acrylate, propyl acrylate and butyl acrylate.
Claim 5
Dependent Claim
24 words
The skin-protecting composition according to claim 1, wherein the alkyl methacrylate (C) is selected from the group consisting of methyl methacrylate and ethyl methacrylate.
Claim 6
Dependent Claim
41 words
The skin-protecting composition according to claim 1, wherein the mono-ethylenically unsaturated monomer (D) is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, half-esters of maleic acid and half-esters of fumaric acid.
Claim 7
Dependent Claim
21 words
The skin-protecting composition according to claim 1, wherein the silicone-acrylic copolymer has a weight average molecular weight of 50,000 to 1,300,000.
Claim 8
Dependent Claim
32 words
The skin-protecting composition according to claim 1, wherein the medium is selected from the group consisting of ethanol, isopropanol, a mixture of water and ethanol and a mixture of water and isopropanol.
Claim 9
Dependent Claim
17 words
The skin-protecting composition according to claim 1, which is a solution of the copolymer in the medium.
Claim 10
Dependent Claim
23 words
The skin-protecting composition according to claim 8, wherein a concentration of the copolymer in the medium is from 1 to 30% by weight.
Claim 11
Dependent Claim
22 words
The skin-protecting composition according to claim 1, which further comprises a cellulose derivative selected from the group consisting of ethylcellulose and hydroxypropylcellulose.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |