US4309319A
Expired / Lapsed
US
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Silicone resin coating composition
Assignee: General Electric Co
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Filing: 1979-10-05
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Granted: 1982-01-05
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Expires: 1999-10-05
Abstract
Abstract A silicone resin coating composition which, when applied to a solid substrate, provides a thick abrasion resistant coating thereto, is disclosed herein. The coating composition has a basic pH in the range of from 7.1-7.8 and is prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion. A thickening agent is added to the resultant hydrolysis product.
Inventors
- 👤 Howard A. Vaughn, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:44
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; B01J35/00; B01J35/20; B01J35/23; B01J37/00; B01J37/02; B01J37/0215; B01J37/0219
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
160 words
An aqueous coating composition comprising a dispersion of colloidal silica having a particle size of from 5 to 150 millimicrons in diameter in a loweraliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 , wherein the lower-aliphatic alcohol-water solvent contains from about 20 to 75 weight percent of said lower-aliphatic alcohol component and wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, the composition further containing from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl guar gum and hydroxypropyl cellulose, said composition having a pH of 7.1 to about 7.8.
Claim 2
Dependent Claim
160 words
An aqueous coating composition comprising a dispersion of colloidal silica having a particle size of from 5 to 150 millimicrons in diameter in a loweraliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 , wherein the lower-aliphatic alcohol-water solvent contains from about 20 to 75 weight percent of said lower-aliphatic alcohol component and wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, the composition further containing from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl guar gum and hydroxypropyl cellulose, said composition having a pH of 7.1 to about 7.8.
Claim 3
Dependent Claim
19 words
A coating composition as defined in claim 1, wherein the aliphatic alcohol is a mixture of methanol and isopropanol.
Claim 4
Dependent Claim
19 words
A coating composition as defined in claim 1, wherein said partial condensate is of CH 3 Si(OH) 3 .
Claim 5
Dependent Claim
24 words
A coating composition as defined in claim 1 containing from about 0.05 to about 0.5 weight percent of a buffered latent silanol condensation catalyst.
Claim 6
Dependent Claim
14 words
A coating composition as defined in claim 4 wherein said catalyst is sodium acetate.
Claim 7
Dependent Claim
14 words
A coating composition as defined in claim 4 wherein said catalyst is tetramethylammonium acetate.
Claim 8
Dependent Claim
16 words
A coating composition as defined in claim 1 wherein the pH is 7.2 to about 7.8.
Claim 9
Dependent Claim
37 words
A coating composition as defined in claim 1 wherein the composition contains from about 10 to about 25 weight percent solids consisting essentially of 25-45 weight percent colloidal silica and 55-75 weight percent of the partial condensate.
Claim 10
Dependent Claim
19 words
A coating composition as defined in claim 8 wherein the partial condensate is of CH 3 Si(OH) 3 .
Claim 11
Dependent Claim
36 words
A coating composition as defined in claim 1 wherein the composition contains about 20% solids, the partial condensate is of CH 3 Si(OH) 3 , and the aliphatic alcohol is a mixture of methanol and isopropanol.
Claim 12
Dependent Claim
140 words
An aqueous coating composition prepared by admixing an aqueous colloidal silica dispersion having a particle size of from 5 to 150 millimicrons in diameter with a solution of an alkyltriacetoxysilane in an alkyltrialkoxysilane, maintaining the temperature of the admixture at from about 20° C. to about 30° C. for a sufficient time to reduce the reaction mixture to one liquid phase maintaining the pH of the composition in the range of from about 7.1 to about 7.8, adjusting the solids content of the reaction mixture by the addition of a lower-aliphatic alcohol thereto in an amount sufficient to provide from about 20 to 75 percent of said lower-aliphatic alcohol component and adding from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl guar gum and hydroxypropyl cellulose to the admixture.
Claim 13
Dependent Claim
140 words
An aqueous coating composition prepared by admixing an aqueous colloidal silica dispersion having a particle size of from 5 to 150 millimicrons in diameter with a solution of an alkyltriacetoxysilane in an alkyltrialkoxysilane, maintaining the temperature of the admixture at from about 20° C. to about 30° C. for a sufficient time to reduce the reaction mixture to one liquid phase maintaining the pH of the composition in the range of from about 7.1 to about 7.8, adjusting the solids content of the reaction mixture by the addition of a lower-aliphatic alcohol thereto in an amount sufficient to provide from about 20 to 75 percent of said lower-aliphatic alcohol component and adding from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl guar gum and hydroxypropyl cellulose to the admixture.
Claim 14
Dependent Claim
24 words
An aqueous coating composition as defined in claim 11 wherein said alkyltrialkoxysilane is methyltrimethoxysilane, said alkyl(triacetoxy)silane is methyl(triacetoxy)silane and said aliphatic alcohol is isopropanol.
Claim 15
Dependent Claim
34 words
An aqueous coating composition as defined in claim 12 wherein said aqueous colloidal silica dispersion has a basic pH, an average particle size of about 12 millimicrons and an alkali content of about 0.10%.
Claim 16
Dependent Claim
151 words
An aqueous coating composition comprising a dispersion of colloidal silica having a particle size of from 5 to 15 millimicrons in diameter in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 , wherein the lower-aliphatic alcohol-water solvent contains from about 20 to 75 weight percent of said lower-aliphatic alcohol component and wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, the composition further containing from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl cellulose and hydroxypropyl guar gum.
Claim 17
Dependent Claim
151 words
An aqueous coating composition comprising a dispersion of colloidal silica having a particle size of from 5 to 15 millimicrons in diameter in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 , wherein the lower-aliphatic alcohol-water solvent contains from about 20 to 75 weight percent of said lower-aliphatic alcohol component and wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, the composition further containing from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl cellulose and hydroxypropyl guar gum.
Claim 18
Dependent Claim
20 words
An aqueous coating composition as defined in claim 14 wherein the lower-aliphatic alcohol is a mixture of methanol and isopropanol.
Claim 19
Dependent Claim
18 words
An aqueous coating composition as defined in claim 14 wherein said silanol is CH 3 Si(OH) 3 .
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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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |