US4520160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane emulsifier compositions and method therefor
Assignee: Dow Silicones Corp
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Filing: 1983-12-27
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Granted: 1985-05-28
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Expires: 2003-12-27
Abstract
Abstract Siloxane-oxyalkylene block copolymer compositions are prepared by a hydrosilylation reaction, using a saturated higher alcohol, such as isostearyl alcohol, as the reaction solvent. The reaction solvent need not be removed from the resulting block copolymer, particularly when the block copolymer is used as an emulsifier in personal care compositions.
Inventors
- 👤 Paul L. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:55
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/06; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/894; C; C08; C08G; C08G77/00; C08G77/42; C08G77/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
In the method for preparing an organopolysiloxane-polyoxyalkylene copolymer composition, said method comprising reacting an organohydrogenpolysiloxane reactant with an olefinically substituted polyoxyalkylene reactant in the presence of a platinum-containing hydrosilylation catalyst, the improvement comprising conducting said reacting in the presence of a reaction-improving amount of an alcohol which has at least 8 carbon atoms and is free of aliphatic unsaturation and allowing said alcohol to remain with the composition after said reacting.
Claim 2
Dependent Claim
71 words
In the method for preparing an organopolysiloxane-polyoxyalkylene copolymer composition, said method comprising reacting an organohydrogenpolysiloxane reactant with an olefinically substituted polyoxyalkylene reactant in the presence of a platinum-containing hydrosilylation catalyst, the improvement comprising conducting said reacting in the presence of a reaction-improving amount of an alcohol which has at least 8 carbon atoms and is free of aliphatic unsaturation and allowing said alcohol to remain with the composition after said reacting.
Claim 3
Dependent Claim
12 words
A method according to claim 1 wherein the alcohol is isostearyl alcohol.
Claim 4
Dependent Claim
31 words
A method according to claim 2 wherein the amount of isostearyl alcohol has a value of at least about 4 percent by weight, based on the total weight of said reactants.
Claim 5
Dependent Claim
9 words
The composition obtained by the method of claim 2.
Claim 6
Dependent Claim
9 words
The composition obtained by the method of claim 3.
Claim 7
Dependent Claim
33 words
A composition consisting essentially of an organopolysiloxane-polyoxyalkylene block copolymer and isostearyl alcohol, the amount of said alcohol being at least about 4 percent by weight, based on the total weight of the composition.
Claim 8
Dependent Claim
33 words
A composition consisting essentially of an organopolysiloxane-polyoxyalkylene block copolymer and isostearyl alcohol, the amount of said alcohol being at least about 4 percent by weight, based on the total weight of the composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |