US5152991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of selectively hydrogenated styrene/butadiene copolymers in cosmetic and pharmaceutical compositions
Assignee: BASF SE
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Filing: 1991-06-13
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Granted: 1992-10-06
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Expires: 2011-06-13
Abstract
Abstract Copolymers selectively hydrogenated on the olefinic double bond and composed of A) 50 to 65% by weight styrene, B) 35 to 50% by weight butadiene and C) 0 to 5% by weight other copolymerizable monomers are used in cosmetic and pharmaceutical compositions.
Inventors
- 👤 Friedrich Vogel
- 👤 Franz Frosch
- 👤 Horst Westenfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:19
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/30; A61K47/32; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8194; A61K9/70; A61K9/7015; A61Q; A61Q19/00; A61Q17/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A cosmetic composition which forms a layer that is not easily washed off skin with water, consisting essentially of 1-20 wt. % of a random copolymer having a molecular weight of 75,000-130,000 composed of 50-65 wt. % of styrene, 30-50 wt. % butadiene and 0-5 wt. % of other copolymerizable monomers, wherein at least 97% of the olefinic double bonds in said copolymer have been hydrogenated and not more than 5% of the aromatic unsaturations are hydrogenated; mixed in an oil-in-water or a water-in-oil emulsion containing an effective amount of a cosmetically active component.
Claim 2
Dependent Claim
94 words
A cosmetic composition which forms a layer that is not easily washed off skin with water, consisting essentially of 1-20 wt. % of a random copolymer having a molecular weight of 75,000-130,000 composed of 50-65 wt. % of styrene, 30-50 wt. % butadiene and 0-5 wt. % of other copolymerizable monomers, wherein at least 97% of the olefinic double bonds in said copolymer have been hydrogenated and not more than 5% of the aromatic unsaturations are hydrogenated; mixed in an oil-in-water or a water-in-oil emulsion containing an effective amount of a cosmetically active component.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein said copolymer is composed of 52-57 wt. % styrene, 43-48 wt. % butadiene and 0-5 wt. % of other copolymerizable monomers.
Claim 4
Dependent Claim
42 words
A process for the topical application of a cosmetic comprising: forming a layer which is not easily washed off skin with water by applying an effective amount of the composition of claim 1 to a subject in need thereof in need thereof.
Claim 5
Dependent Claim
103 words
A process for the manufacture of a cosmetic composition that forms a layer which is not easily washed off skin with water consisting essentially of: adding 1-20 wt. % of a random copolymer having a molecular weight of 75,000-130,000 composed of 50-65 wt. % of styrene, 30-50 wt. % of butadiene and 0.14 5 wt. % of other copolymerizable monomers, wherein at least 97% of the olefinic double bonds in said copolymer have been hydrogenated, and not more than 5% of the aromatic unsaturations are hydrogenated to an oil-in-water or a water in oil emulsion containing an effective amount of cosmetically active component.
Claim 6
Dependent Claim
103 words
A process for the manufacture of a cosmetic composition that forms a layer which is not easily washed off skin with water consisting essentially of: adding 1-20 wt. % of a random copolymer having a molecular weight of 75,000-130,000 composed of 50-65 wt. % of styrene, 30-50 wt. % of butadiene and 0.14 5 wt. % of other copolymerizable monomers, wherein at least 97% of the olefinic double bonds in said copolymer have been hydrogenated, and not more than 5% of the aromatic unsaturations are hydrogenated to an oil-in-water or a water in oil emulsion containing an effective amount of cosmetically active component.
Claim 7
Dependent Claim
29 words
The process of claim 4 wherein said copolymer is composed of 52-57 wt. % of styrene, 43-48 wt. % of butadiene, and 0-5 wt. % of other copolymerizable monomers.
References Cited (Backward Citations)
DE2423849A1
Cited
US4976961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |