EP0265228A2
Expired / Lapsed
EP
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Acrylic copolymer and skin protective and their use
Assignee: Nissin Chemicals Co Ltd
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Filing: 1987-10-20
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Granted: —
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Expires: 2007-10-20
Abstract
Abstract An acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is in the range 75:25 to 95:5, and containing therein residual monomer at 50 ppm or less and substantially no surfactant is useful in agents for protecting the skin.
Inventors
- 👤 Izuma Saitoh
- 👤 Shigeru Kido
- 👤 Yoshio Sasaki
- 👤 Syuichiro Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:50
CPC Classifications
A; A61; A61Q; A61Q17/00; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1802; Y; Y10; Y10S; Y10S526/00; Y10S526/936
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
38 words
An acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is from 75:25 to 95:5, said copolymer containing residual monomer at 50 ppm or less and substantially no surfactant.
Claim 2
Dependent Claim
38 words
An acrylic copolymer of ethyl acrylate and methacrylic acid wherein the weight ratio of ethyl acrylate to methacrylic acid is from 75:25 to 95:5, said copolymer containing residual monomer at 50 ppm or less and substantially no surfactant.
Claim 3
Dependent Claim
18 words
An agent for protecting the skin including an effective amount of a copolymer as claimed in claim 1.
Claim 4
Dependent Claim
45 words
An agent as claimed in claim 2 which consists essentially of the following components: a. acrylic copolymer as defined in claim 1 ----- approximately 2 to 10%; b. cellulose derivative ----- approximately 0.2 to 2%; and c. an aqueous alcohol to make up the balance.
Claim 5
Dependent Claim
26 words
An agent as claimed in claim 2 or claim 3, wherein the mean molecular weight of said acrylic copolymer is between about 100,000 and about 1,300,000.
Claim 6
Dependent Claim
18 words
An agent as claimed in any one of claims 2 to 4, wherein said cellulose derivative is ethylcellulose.
Claim 7
Dependent Claim
19 words
An agent as claimed in any one of claims 2 to 5, wherein said alcohol is ethanol or isopropanol.
Claim 8
Dependent Claim
59 words
A process for preparing a skin protective copolymer as defined in claim 1 which comprises copolymerizing 75 to 95 parts by weight of ethyl acrylate and 25 to 5 parts by weight of methacrylic acid, preferably copolymerizing in deionized water in the presence of an initiator (e.g., persulfate) followed by maintenance of at least the temperature employed during polymerization.
Claim 9
Dependent Claim
16 words
The use of a copolymer as defined in claim 1 in making a skin protective agent.
Claim 10
Dependent Claim
19 words
The use of claim 8, wherein the agent is as defined in any one of claims 3 to 6.
Claim 11
Dependent Claim
19 words
The skin cosmetic or protective use of an agent as defined in any one of claims 2 to 6.
References Cited (Backward Citations)
No citation records indexed.
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