US4954554A
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Silicone emulsions
Assignee: Dow Silicones Corp
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Filing: 1989-02-27
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Granted: 1990-09-04
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Expires: 2009-02-27
Abstract
Abstract Aqueous emulsions of curable silicone compositions provide cured coatings having improved gloss and/or water-repellancy and/or adhesive release if formulated to contain polyvinylachohol having a degree of hydrolysis of 90 mol % or more. The extent of improvement is directly related to the degree of hydrolysis of the PVA. PVA having an average degree of hydrolysis of from 94 to 99 mol % is particularly effective for improving these properties of cured coatings. Conveniently, a mixture of two or more commercially available PVAs having different degrees of hydrolysis can be used to arrive at a PVA having a desired degree of hydrolysis.
Inventors
- 👤 David J. Bunge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:04
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08J; C08J3/00; C08J3/02; C08J3/03; C09; C09D; C09D183/00; C09D183/04; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
55 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent, having an average degree of hydrolysis of at least 90 mol % , as the sole emulsifying agent and (C) water.
Claim 2
Dependent Claim
55 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent, having an average degree of hydrolysis of at least 90 mol % , as the sole emulsifying agent and (C) water.
Claim 3
Dependent Claim
41 words
An emulsion composition according to claim 1 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an organohydrogenpolysiloxane sufficient to provide from 0.5 to 10 silicon-bonded hydrogen atoms for each of said silicon-bonded curing radicals in the composition.
Claim 4
Dependent Claim
45 words
An emulsion composition according to claim 1 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an platinum-containing catalyst sufficient to provide from 10 to 1000 parts by weight of platinum per million parts by weight of curable polydiorganosiloxane in the composition.
Claim 5
Dependent Claim
29 words
An emulsion composition according to claim 1 wherein the Component (A) comprises a mixture of one or more curable polydiorganosiloxane fluids and one or more solid, benzene-soluble organopolysiloxane resins.
Claim 6
Dependent Claim
40 words
An emulsion composition according to claim 1 consisting essentially of from 1 to 50 parts by weight (A); from 1 to 5 percent by weight (B), based on the weight of the emulsion; and 50 parts by weight of (C).
Claim 7
Dependent Claim
114 words
An emulsion composition according to claim 1 wherein the Component (A) comprises a polydiorganosiloxane of the formula AMe 2 SiO(Me 2 SiO) x (MeASiO) y SiMe 2 A, wherein A denotes an alkenyl radical, Me denotes the methyl radical, x has an average values of 10 or more and y has a value of from 0 to 0.1x; and an organohydrogenpolysiloxane of the formula Me 3 SiO(Me 2 SiO) m (MeHSiO) n SiMe 3 , wherein m has a value of zero or more, n has a value of two or more, and Me denotes the methyl radical, there being from 0.9 to 3.0 silicon-bonded hydrogen atoms for every alkenyl radical in the composition.
Claim 8
Dependent Claim
55 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent having an average degree of hydrolysis of from 94 to 99 mol %, as the sole emulsifying agent and (C) water.
Claim 9
Dependent Claim
55 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent having an average degree of hydrolysis of from 94 to 99 mol %, as the sole emulsifying agent and (C) water.
Claim 10
Dependent Claim
41 words
An emulsion composition according to claim 7 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an organohydrogenpolysiloxane sufficient to provide from 0.5 to 10 silicon-bonded hydrogen atoms for each of said silicon-bonded curing radicals in the composition.
Claim 11
Dependent Claim
45 words
An emulsion composition according to claim 7 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an platinum-containing catalyst sufficient to provide from 10 to 1000 parts by weight of platinum per million parts by weight of curable polydiorganosiloxane in the composition.
Claim 12
Dependent Claim
29 words
An emulsion composition according to claim 7 wherein the Component (A) comprises a mixture of one or more curable polydiorganosiloxane fluids and one or more solid, benzene-soluble organopolysiloxane resins.
Claim 13
Dependent Claim
40 words
An emulsion composition according to claim 7 consisting essentially of from 1 to 50 parts by weight (A); from 1 to 5 percent by weight (B), based on the weight of the emulsion; and 50 parts by weight of (C).
Claim 14
Dependent Claim
114 words
An emulsion composition according to claim 7 wherein the Component (A) comprises a polydiorganosiloxane of the formula AMe 2 SiO(Me 2 SiO) x (MeASiO) y SiMe 2 A, wherein A denotes an alkenyl radical, Me denotes the methyl radical, x has an average values of 10 or more and y has a value of from 0 to 0.lx; and an organohydrogenpolysiloxane of the formula Me 3 SiO(Me 2 SiO) m (MeHSiO) n SiMe 3 , wherein m has a value of zero or more, n has a value of two or more, and Me denotes the methyl radical, there being from 0.9 to 3.0 silicon-bonded hydrogen atoms for every alkenyl radical in the composition.
Claim 15
Dependent Claim
70 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent having an average degree of hydrolysis of at lease 90 mol %, as the sole emulsifying agent, and consisting of a mixture of two or more polyvinylalcohols which differ in degrees of hydrolysis; and (C) water.
Claim 16
Dependent Claim
70 words
An emulsion composition consisting essentially of: (A) a curable composition comprising an organopolysiloxane bearing silicon-bonded curing radicals selected from the group consisting of the hydroxyl radical and olefinic radicals; (B) a polyvinylalcohol emulsifying agent having an average degree of hydrolysis of at lease 90 mol %, as the sole emulsifying agent, and consisting of a mixture of two or more polyvinylalcohols which differ in degrees of hydrolysis; and (C) water.
Claim 17
Dependent Claim
41 words
An emulsion composition according to claim 13 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an organohydrogenpolysiloxane sufficient to provide from 0.5 to 10 silicon-bonded hydrogen atoms for each of said silicon-bonded curing radicals in the composition.
Claim 18
Dependent Claim
45 words
An emulsion composition according to claim 13 wherein the Component (A) comprises a curable polydiorganosiloxane and an amount of an platinum-containing catalyst sufficient to provide from 10 to 1000 parts by weight of platinum per million parts by weight of curable polydiorganosiloxane in the composition.
Claim 19
Dependent Claim
29 words
An emulsion composition according to claim 13 wherein the Component (A) comprises a mixture of one or more curable polydiorganosiloxane fluids and one or more solid benzene-soluble organopolysiloxane resins.
Claim 20
Dependent Claim
40 words
An emulsion composition according to claim 13 consisting essentially of from 1 to 50 parts by weight (A); from 1 to 5 percent by weight (B), based on the weight of the emulsion; and 50 parts by weight of (C).
Claim 21
Dependent Claim
114 words
An emulsion composition according to claim 13 wherein the Component (A) comprises a polydiorganosiloxane of the formula AMe 2 SiO(Me 2 SiO) x (MeASiO) y SiMe 2 A, wherein A denotes an alkenyl radical, Me denotes the methyl radical, x has an average values of 10 or more and y has a value of from 0 to 0.1x; and an organohydrogenpolysiloxane of the formula Me 3 SiO(Me 2 SiO) m (MeHSiO) n SiMe 3 , wherein m has a value of zero or more, n has a value of two or more, and Me denotes the methyl radical, there being from 0.9 to 3.0 silicon-bonded hydrogen atoms for every alkenyl radical in the composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |