US4524061A
Expired / Lapsed
US
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Polymeric sunscreens
Assignee: ISP Investments LLC
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Filing: 1983-04-22
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Granted: 1985-06-18
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Expires: 2003-04-22
Abstract
Abstract The polymeric sunscreen agents of the present invention comprise interpolymers of (a) an olefinic p-aminobenzoate devoid of hydroxy substitution; (b) N-vinylpyrrolidone; (c) a monomer selected from the group consisting of a vinyl lactam having a number average molecular weight of at least 125, an acrylate or methacrylate or any mixture thereof and optionally (d) acrylic or methacrylic acid.
Inventors
- 👤 James R. Cho
- 👤 Stephen C. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:58
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445; A61K8/72; A61K8/81; A61K8/817; A61K8/8182; C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/10; C08F226/00; C08F226/06; C08F226/10; A61K2800/00; A61K2800/40; A61K2800/57
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
The polymer consisting essentially of the monomers: (a) 10 to 50 wt. % of a p-amino-alkenylbenzoate having the formula ##STR4## wherein R is hydrogen or lower alkyl, R 1 is hydrogen or lower alkyl and R 2 is a vinyl or allyl radical; (b) 5 to 6 wt. % of N-vinylpyrrolidone; (c) 20 to 80 wt. % of a monomer selected from the group consisting of an acrylate or methacrylate having 5 to 24 carbon atoms or a lactam having the formula ##STR5## wherein m has a value of 3 to 5 and n has a value of 2 to 4; and mixtures thereof; and optionally containing (d) 0 to 40 wt. % of acrylic or methacrylic acid based on the total of monomers (a), (b) and (c).
Claim 2
Dependent Claim
128 words
The polymer consisting essentially of the monomers: (a) 10 to 50 wt. % of a p-amino-alkenylbenzoate having the formula ##STR4## wherein R is hydrogen or lower alkyl, R 1 is hydrogen or lower alkyl and R 2 is a vinyl or allyl radical; (b) 5 to 6 wt. % of N-vinylpyrrolidone; (c) 20 to 80 wt. % of a monomer selected from the group consisting of an acrylate or methacrylate having 5 to 24 carbon atoms or a lactam having the formula ##STR5## wherein m has a value of 3 to 5 and n has a value of 2 to 4; and mixtures thereof; and optionally containing (d) 0 to 40 wt. % of acrylic or methacrylic acid based on the total of monomers (a), (b) and (c).
Claim 3
Dependent Claim
11 words
The polymer of claim 1 wherein component (a) is N,N-dimethyl vinyl-p-aminobenzoate.
Claim 4
Dependent Claim
11 words
The polymer of claim 1 wherein component (c) is a lactam.
Claim 5
Dependent Claim
12 words
The polymer of claim 1 wherein component (c) is a butyl acrylate.
Claim 6
Dependent Claim
12 words
The polymer of claim 3 wherein component (c) is a vinyl caprolactam.
Claim 7
Dependent Claim
13 words
The polymer of claim 1 wherein component (c) is a dimethylamino ethyl methacrylate.
Claim 8
Dependent Claim
12 words
The polymer of claim 1 wherein component (c) is a lauryl methacrylate.
Claim 9
Dependent Claim
19 words
The polymer of claim 1 wherein component (c) is a mixture of a lactam and a dimethylamino alkyl methacrylate.
Claim 10
Dependent Claim
28 words
The polymer of claim 1 wherein component (d) is present in an amount of between about 5 and about 40 weight % of monomers (a), (b) and (c).
Claim 11
Dependent Claim
24 words
The polymer of claim 9 wherein component (d) is present in an amount up to 25 weight % of monomers (a), (b) and (c).
Claim 12
Dependent Claim
32 words
A sunscreening formulation comprising an effective amount sunscreening amount of the polymer of claim 1 having a specific viscosity of from about 0.05 to about 0.9 and an inert cosmetically acceptable carrier.
Claim 13
Dependent Claim
18 words
The sunscreening formulation of claim 11 containing from about 0.02 to about 25 wt. % of said polymer.
Claim 14
Dependent Claim
31 words
The sunscreen formulation of claim 11 wherein the p-amino-alkenylbenzoate of the polymer is N,N-dimethyl vinyl-p-aminobenzoate and component (c) of the polymer contains at least a major portion of N,N-dimethylamino ethyl methacrylate.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |