US4501619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous emulsions of carboxyl-containing silicone fluids and a method for their preparation
Assignee: Dow Silicones Corp
•
Filing: 1983-11-14
•
Granted: 1985-02-26
•
Expires: 2003-11-14
Abstract
Abstract Highly stable emulsions of carboxyl-containing silicone fluids in water are prepared by using a combination of two surfactants. The first, or primary surfactant, has the formula RO(C m H 2m O) n H, where R is a hydrocarbon lipophile, m has a value of 1, 2, or 3, and n has an average value greater than 15. The second or cosurfactant, is selected from fatty acid esters of sorbitol and surfactants having the formula R'O(C p H 2p O) q H, wherein R' is a hydrocarbon lipophile, p has a value of 1, 2, or 3 and q has a value such that the cosurfactant is just insoluble in the carboxyl-containing silicone fluid.
Inventors
- 👤 Ronald P. Gee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/893; A61K8/02; A61K8/04; A61K8/06; A61K8/068; A61K8/30; A61K8/33; A61K8/39; A61K8/896; A61K8/899; A61Q; A61Q5/00; A61Q5/12; C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
255 words
An aqueous emulsion comprising a combination of (A) from 1% to 80%, by weight, based on the total weight of the emulsion, of a carboxyl-containing silicone having the formula Q'Me.sub.2 SiO(Me.sub.2 SiO).sub.x (MeQSiO).sub.y SiMe.sub.2 Q' wherein Me represents the methyl radical Q is selected from the group consisting of carboxyalkyl radicals, and carboxy ester radicals, Q' is selected from the group consisting of Q radicals, Me radicals, and hydroxyl radicals, x has an average value of from 20 to 290, y has an average value of from 1 to 30, (B) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a primary surfactant having the formula RO(C.sub.m H.sub.2m O).sub.n H wherein m has an average value of 1, 2, or 3, n has an average value greater than 15, R is a hydrocarbon lipophile, (C) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a cosurfactant selected from the group consisting of (i) fatty acid esters of sorbitol chosen so as to be just insoluble in said carboxyl-containing silicone, and (ii) surfactants having the formula R'O(C.sub.p H.sub.2p 0).sub.q H, wherein p has an average value of 1, 2, or 3 q has an average value large enough to render said cosurfactant just insoluble in said carboxyl-containing silicone, R' is a hydrocarbon lipophile, and (D) from 10% to 98.996%, by weight, based on the total weight of the emulsion, of water; with the proviso that said primary surfactant is more hydrophilic than said cosurfactant.
Claim 2
Dependent Claim
255 words
An aqueous emulsion comprising a combination of (A) from 1% to 80%, by weight, based on the total weight of the emulsion, of a carboxyl-containing silicone having the formula Q'Me.sub.2 SiO(Me.sub.2 SiO).sub.x (MeQSiO).sub.y SiMe.sub.2 Q' wherein Me represents the methyl radical Q is selected from the group consisting of carboxyalkyl radicals, and carboxy ester radicals, Q' is selected from the group consisting of Q radicals, Me radicals, and hydroxyl radicals, x has an average value of from 20 to 290, y has an average value of from 1 to 30, (B) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a primary surfactant having the formula RO(C.sub.m H.sub.2m O).sub.n H wherein m has an average value of 1, 2, or 3, n has an average value greater than 15, R is a hydrocarbon lipophile, (C) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a cosurfactant selected from the group consisting of (i) fatty acid esters of sorbitol chosen so as to be just insoluble in said carboxyl-containing silicone, and (ii) surfactants having the formula R'O(C.sub.p H.sub.2p 0).sub.q H, wherein p has an average value of 1, 2, or 3 q has an average value large enough to render said cosurfactant just insoluble in said carboxyl-containing silicone, R' is a hydrocarbon lipophile, and (D) from 10% to 98.996%, by weight, based on the total weight of the emulsion, of water; with the proviso that said primary surfactant is more hydrophilic than said cosurfactant.
Claim 3
Dependent Claim
15 words
An emulsion as set forth in claim 1 wherein radical Q is a carboxyalkyl radical.
Claim 4
Dependent Claim
20 words
An emulsion as set forth in claim 2 wherein the carboxyalkyl radical is the --CH 2 CH(CH 3 )COOH radical.
Claim 5
Dependent Claim
30 words
An emulsion as set forth in claim 3 wherein x has an average value of from 20 to 30 and y has an average value of from 1 to 4.
Claim 6
Dependent Claim
81 words
An emulsion as set forth in claim 4, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 7
Dependent Claim
24 words
An emulsion as set forth in claim 5 wherein n has a value of from 30 to 50, and the cosurfactant is sorbitan monolaurate.
Claim 8
Dependent Claim
30 words
An emulsion as set forth in claim 3 wherein x has an average value of from 90 to 100 and y has an average value of from 1 to 4.
Claim 9
Dependent Claim
81 words
An emulsion as set forth in claim 7, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 10
Dependent Claim
24 words
An emulsion as set forth in claim 8 wherein n has a value of from 30 to 50, and the cosurfactant is sorbitan monolaurate.
Claim 11
Dependent Claim
15 words
An emulsion as set forth in claim 1 wherein radical Q is a carboxythioalkyl radical.
Claim 12
Dependent Claim
22 words
An emulsion as set forth in claim 10 wherein the carboxythioalkyl radical is the --CH 2 CH 2 SCH 2 COOH radical.
Claim 13
Dependent Claim
30 words
An emulsion as set forth in claim 11 wherein x has an average value of from 20 to 30, and y has an average value of from 1 to 4.
Claim 14
Dependent Claim
81 words
An emulsion as set forth in claim 12, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, base on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 15
Dependent Claim
28 words
An emulsion as set forth in claim 13 wherein n has a value of from 30 to 50 and q has a value of from 10 to 20.
Claim 16
Dependent Claim
30 words
An emulsion as set forth in claim 11 wherein x has an average value of from 90 to 100 and y has an average value of from 1 to 4.
Claim 17
Dependent Claim
81 words
An emulsion as set forth in claim 15, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 18
Dependent Claim
24 words
An emulsion as set forth in claim 16 wherein n has a value of from 30 to 50 and the cosurfactant is sorbitan monolaurate.
Claim 19
Dependent Claim
15 words
An emulsion as set forth in claim 1, wherein Q is a carboxy ester radical.
Claim 20
Dependent Claim
22 words
An emulsion as set forth in claim 18, wherein the carboxy ester radical is the --CH 2 CH(CH 3 )COOCH 3 radical.
Claim 21
Dependent Claim
30 words
An emulsion as set forth in claim 19 wherein x has an average value of from 20 to 30 and y has an average value of from 1 to 4.
Claim 22
Dependent Claim
81 words
An emulsion as set forth in claim 20, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 23
Dependent Claim
30 words
An emulsion as set forth in claim 19 wherein X has an average value of from 90 to 100, and y has an average value of from 1 to 4.
Claim 24
Dependent Claim
81 words
An emulsion as set forth in claim 22, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 25
Dependent Claim
24 words
An emulsion as set forth in claim 23 wherein n has a value of from 30 to 50 and the cosurfactant is sorbitan monolaurate.
Claim 26
Dependent Claim
81 words
An emulsion as set forth in claim 1, comprising a combination of: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 27
Dependent Claim
45 words
An emulsion as set forth in claim 25 wherein x has a value of from 100 to 150; y has a value of from 20 to 30; n has a value of from 60 to 90; q has a value of from 30 to 50;
Claim 28
Independent Claim
296 words
A method for producing stable aqueous emulsions of carboxyl group containing silicone fluids, said method comprising, first, mixing together: (A) from 1% to 80%, by weight, based on the total weight of the emulsion, of a carboxyl-containing silicone having the formula Q'Me.sub.2 SiO(Me.sub.2 SiO).sub.x (MeQSiO).sub.y SiMe.sub.2 Q' wherein Me represents the methyl radical Q is selected from the group consisting of carboxyalkyl radicals, carboxythioalkyl radicals, and carboxy ester radicals, Q' is selected from the group consisting of Q radicals, Me radicals, and hydroxyl radicals, x has an average value of from 20 to 290, y has an average value of from 1 to 30, (B) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a primary surfactant having the formula RO(C.sub.m H.sub.2m O).sub.n H wherein m has an average value of 1, 2, or 3, n has an average value greater than 15, R is a hydrocarbon lipophile, (C) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a cosurfactant selected from the group consisting of (i) fatty acid esters of sorbitol chosen so as to be just insoluble in said carboxyl-containing silicone, and (ii) surfactants having the formula R'O(C.sub.p H.sub.2p O).sub.q H, wherein p has an average value of 1, 2, or 3 q has an average value large enough to render said cosurfactant just insoluble in said carboxyl-containing silicone, R' is a hydrocarbon lipophile, and (D) from 10% to 98.996%, by weight, based on the total weight of the emulsion, of water; said primary surfactant being more hydrophilic than said cosurfactant, and, second, exposing the resulting mixture to sufficient shearing forces for a sufficient length of time such that component (A) becomes dispersed into particles less than about 0.5 microns in diameter.
Claim 29
Independent Claim
296 words
A method for producing stable aqueous emulsions of carboxyl group containing silicone fluids, said method comprising, first, mixing together: (A) from 1% to 80%, by weight, based on the total weight of the emulsion, of a carboxyl-containing silicone having the formula Q'Me.sub.2 SiO(Me.sub.2 SiO).sub.x (MeQSiO).sub.y SiMe.sub.2 Q' wherein Me represents the methyl radical Q is selected from the group consisting of carboxyalkyl radicals, carboxythioalkyl radicals, and carboxy ester radicals, Q' is selected from the group consisting of Q radicals, Me radicals, and hydroxyl radicals, x has an average value of from 20 to 290, y has an average value of from 1 to 30, (B) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a primary surfactant having the formula RO(C.sub.m H.sub.2m O).sub.n H wherein m has an average value of 1, 2, or 3, n has an average value greater than 15, R is a hydrocarbon lipophile, (C) from 0.002% to 15%, by weight, based on the total weight of the emulsion, of a cosurfactant selected from the group consisting of (i) fatty acid esters of sorbitol chosen so as to be just insoluble in said carboxyl-containing silicone, and (ii) surfactants having the formula R'O(C.sub.p H.sub.2p O).sub.q H, wherein p has an average value of 1, 2, or 3 q has an average value large enough to render said cosurfactant just insoluble in said carboxyl-containing silicone, R' is a hydrocarbon lipophile, and (D) from 10% to 98.996%, by weight, based on the total weight of the emulsion, of water; said primary surfactant being more hydrophilic than said cosurfactant, and, second, exposing the resulting mixture to sufficient shearing forces for a sufficient length of time such that component (A) becomes dispersed into particles less than about 0.5 microns in diameter.
Claim 30
Dependent Claim
15 words
A method as set forth in claim 27 wherein radical Q is a carboxyalkyl radical.
Claim 31
Dependent Claim
20 words
A method as set forth in claim 28 wherein the carboxyalkyl radical is the --CH 2 CH(CH 3 )COOH radical.
Claim 32
Dependent Claim
30 words
A method as set forth in claim 29 wherein x has an average value of from 20 to 30 and y has an average value of from 1 to 4.
Claim 33
Dependent Claim
30 words
A method as set forth in claim 29 wherein x has an average value of from 90 to 100 and y has an average value of from 1 to 4.
Claim 34
Dependent Claim
15 words
A method as set forth in claim 27 wherein radical Q is a carboxythioalkyl radical.
Claim 35
Dependent Claim
22 words
A method as set forth in claim 32 wherein the carboxythioalkyl radical is the --CH 2 CH 2 SCH 2 COOH radical.
Claim 36
Dependent Claim
30 words
A method as set forth in claim 33 wherein x has an average value of from 20 to 30 and y has an average value of from 1 to 4.
Claim 37
Dependent Claim
30 words
A method as set forth in claim 33 wherein x has an average value of from 90 to 100 and y has an average value of from 1 to 4.
Claim 38
Dependent Claim
15 words
A method as set forth in claim 27 wherein Q is a carboxy ester radical.
Claim 39
Dependent Claim
22 words
A method as set forth in claim 36 wherein the carboxy ester radical is the --CH 2 CH(CH 3 )COOCH 3 .
Claim 40
Dependent Claim
30 words
A method as set forth in claim 37 wherein x has an average value of from 20 to 30, and y has an average value of from 1 to 4.
Claim 41
Dependent Claim
30 words
A method as set forth in claim 37 wherein x has an average value of from 90 to 100, and y has an average value of from 1 to 4.
Claim 42
Dependent Claim
81 words
A method as set forth in claim 27 wherein there is combined: from 20% to 50% by weight, based on the total weight of the emulsion, of component (A); from 0.8% to 10%, by weight, based on the total weight of the emulsion, of component (B); from 0.2% to 5%, by weight, based on the total weight of the emulsion, of component (C); and from 35% to 79%, by weight, based on the total weight of the emulsion, of component (D).
Claim 43
Dependent Claim
42 words
A method as set forth in claim 40 wherein: x has a value of from 20 to 30; y has a value of from 1 to 4; n has a value of from 30 to 50; and the cosurfactant is sorbitan monolaurate.
Claim 44
Dependent Claim
42 words
A method as set forth in claim 40 wherein: x has a value of from 90 to 100; y has a value of from 1 to 4; n has a value of from 30 to 50; and the consurfactant is sorbitan monolaurate.
Claim 45
Dependent Claim
46 words
A method as set forth in claim 40 wherein: x has a value of from 100 to 150; y has a value of from 20 to 30; n has a value of from 60 to 90; and q has a value of from 30 to 50.
References Cited (Backward Citations)
US2544194A
Cited
US3812201A
Cited
US4246029A
Cited
US4365028A
Cited
US4426298A
Cited
US4427815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |