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US4698178A
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Use of polyoxyalkylene-polysiloxane copolymers with silicon-linked, long-chain alkyl radicals as emulsifiers for the preparation of water/oil emulsions
Assignee: Evonik Operations GmbH
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Filing: 1985-09-19
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Granted: 1987-10-06
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Expires: 2005-09-19
Abstract
Abstract The invention relates to the use of copolymers of the average formula ##STR1## in which R is an alkyl radical with 1 to 4 carbon atoms or a hydrogen radical; n=10 to 200; m=1 to 25; o=1 to 100 with the proviso that o is not less than m, and 3 o is less than n in the average molecule; p=7 to 17; and wherein the molecular weight of the (C 2 H 4 O--) x (C 3 H 6 O--) y R radical is 250 to 2,000 with x and y being selected so that the weight ratio of oxyethylene to oxypropylene is 100:0 to 20:80, as emulsifiers for the preparation of W/O emulsions, whose oily phase consists of or contains silicone oil.
Inventors
- 👤 Rudolf Huttinger
- 👤 Hans-Joachim Kollmeier
- 👤 Rolf-Dieter Langenhagen
- 👤 Alfred Walter
- 👤 Wilhelm Wolfes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:47
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/894; A61K47/00; A61K47/30; A61K47/34; A61K8/02; A61K8/04; A61K8/06; A61K8/064; A61Q; A61Q19/00; C; C09; C09K; C09K23/00; C09K23/54; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/905; Y10S516/906
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
An emulsion prepared by the method comprising preparation of a water/oil emulsion wherein the oily phase is or contains silicone oil by mixing the oily phase with water in the presence of an emulsifier, the improvement which comprises said emulsifier being present in an emulsifying effective amount and being a copolymer having the average formula: ##STR4## in which R is an alkyl adical with 1 to 4 carbon atoms or a hydrogen radical; n=10 to 200; m=1 to 25; o=1 to 100 with the proviso that o is not less than m, and 3 o is less than n in the average molecule; p=7 to 17; and wherein the molecular weight of the (C 2 H 4 O--) x (C 3 H 6 O--) y R radical is 250 to 2,000 with x and y being selected so that the weight ratio of oxyethylene to oxyethylene to oxypropylene is 100:0 to 20:80.
Claim 2
Dependent Claim
152 words
An emulsion prepared by the method comprising preparation of a water/oil emulsion wherein the oily phase is or contains silicone oil by mixing the oily phase with water in the presence of an emulsifier, the improvement which comprises said emulsifier being present in an emulsifying effective amount and being a copolymer having the average formula: ##STR4## in which R is an alkyl adical with 1 to 4 carbon atoms or a hydrogen radical; n=10 to 200; m=1 to 25; o=1 to 100 with the proviso that o is not less than m, and 3 o is less than n in the average molecule; p=7 to 17; and wherein the molecular weight of the (C 2 H 4 O--) x (C 3 H 6 O--) y R radical is 250 to 2,000 with x and y being selected so that the weight ratio of oxyethylene to oxyethylene to oxypropylene is 100:0 to 20:80.
Claim 3
Dependent Claim
32 words
An emulsion prepared by the method as in claim 1 wherein the copolymer is present in an amount from 0.3 to 5 weight percent based on the total weight of the emulsion.
Claim 4
Dependent Claim
114 words
An emulsifier for the preparation of a water/oil emulsion wherein the oily phase is or contains silicone oil comprising ##STR5## in which R is an alkyl radical with 1 to 4 carbon atoms or a hydrogen radical; n=10 to 200; m=1 to 25; o=1 to 100 with the proviso that o is not less than m, and 3 o is less than n in the average molecule; p=7 to 17; and wherein the molecular weight of the (C 2 H 4 O--) x (C 3 H 6 O--) y R radical is 250 to 2,000 with x and y being selected so that the weight ratio of oxyethylene to oxypropylene is 100:0 to 20:80.
Claim 5
Dependent Claim
114 words
An emulsifier for the preparation of a water/oil emulsion wherein the oily phase is or contains silicone oil comprising ##STR5## in which R is an alkyl radical with 1 to 4 carbon atoms or a hydrogen radical; n=10 to 200; m=1 to 25; o=1 to 100 with the proviso that o is not less than m, and 3 o is less than n in the average molecule; p=7 to 17; and wherein the molecular weight of the (C 2 H 4 O--) x (C 3 H 6 O--) y R radical is 250 to 2,000 with x and y being selected so that the weight ratio of oxyethylene to oxypropylene is 100:0 to 20:80.
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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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |