Patent US5577022A successfully refreshed from Google Patents.
US3976497A
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Paint compositions
Assignee: Dow Silicones Corp
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Filing: 1974-06-25
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Granted: 1976-08-24
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Expires: 1994-06-25
Abstract
Abstract Pigments are incorporated in an acidic dispersion of colloidal silica and hydroxylated silsesquioxane in an alcohol-water medium to provide paint compositions.
Inventors
- 👤 Harold A. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
127 words
A paint composition comprising a pigment carried in a vehicle consisting essentially of a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said vehicle containing 10 to 60 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, said vehicle containing sufficient acid to provide a pH in the range of 3.0 to 6.0.
Claim 2
Dependent Claim
127 words
A paint composition comprising a pigment carried in a vehicle consisting essentially of a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) 3 in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said vehicle containing 10 to 60 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, said vehicle containing sufficient acid to provide a pH in the range of 3.0 to 6.0.
Claim 3
Dependent Claim
31 words
A paint composition in accordance with claim 1 wherein the acid is a water-miscible organic acid selected from the group consisting of acetic acid, formic acid, propanoic acid and maleic acid.
Claim 4
Dependent Claim
15 words
A paint composition in accordance with claim 2 wherein the organic acid is acetic acid.
Claim 5
Dependent Claim
38 words
A paint composition in accordance with claim 2 in which the alcohol in the alcohol-water cosolvent is present in an amount in the range of 20 to 75 weight percent based on the total weight of the cosolvent.
Claim 6
Dependent Claim
20 words
A paint composition in accordance with claim 4 in which at least 50 weight percent of the alcohol is isopropanol.
Claim 7
Dependent Claim
29 words
A paint composition in accordance with claim 2 including from 0.05 to 1.5 weight percent, based on the weight of the vehicle, of a buffered latent silanol condensation catalyst.
Claim 8
Dependent Claim
20 words
A paint composition in accordance with claim 6 wherein the catalyst is an alkali metal salt of a carboxylic acid.
Claim 9
Dependent Claim
14 words
A paint composition in accordance with claim 7 wherein the catalyst is sodium acetate.
Claim 10
Dependent Claim
20 words
A paint composition in accordance with claim 6 wherein the catalyst is a quaternary ammonium salt of a carboxylic acid.
Claim 11
Dependent Claim
84 words
A paint composition in accordance with claim 1 wherein the vehicle contains 25 to 40 weight percent solids, the colloidal silica is of a 50 to 60 millimicron-diameter particle size, the partial condensate of CH 3 Si(OH 3 ) 3 being present in an amount in the range of 35 to 55 weight percent of the total solids in a cosolvent of methanol, isopropanol and water; said alcohols being present in amount in the range of 30 to 60 weight percent of the cosolvent.
Claim 12
Dependent Claim
33 words
A paint composition in accordance with claim 1 wherein the pigment is present in an amount in the range of from 1 to 200 parts by weight per 100 parts of said vehicle.
Claim 13
Dependent Claim
32 words
A point composition in accordance with claim 11 wherein the pigment is present in an amount in the range of 20 to 150 parts by weight per 100 parts of said vehicle.
Claim 14
Dependent Claim
17 words
A paint composition in accordance with claim 12 wherein the pigment is a solid inorganic particulate material.
Claim 15
Dependent Claim
14 words
A paint composition in accordance with claim 13 wherein the pigment comprises titanium dioxide.
Claim 16
Dependent Claim
19 words
A paint composition in accordance with claim 14 wherein the pigment comprises a mixture of titanium dioxide and mica.
Claim 17
Dependent Claim
16 words
A solid substrate having at least one surface coated with the paint composition of claim 1.
Claim 18
Dependent Claim
25 words
An article in accordance with claim 16 wherein the paint composition has been cured to form a binder matrix of RSiO 3/2 and colloidal silica.
Claim 19
Dependent Claim
20 words
An article in accordance with claim 17 wherein the silsesquioxane portion of the binder is CH 3 SiO 3/2 .
Claim 20
Dependent Claim
22 words
An article in accordance with claim 18 wherein the CH 3 SiO 3/2 comprises 35 to 55 weight percent of the binder.
Claim 21
Dependent Claim
14 words
An article in accordance with claim 17 wherein the pigment comprises TiO 2 .
Claim 22
Dependent Claim
12 words
An article in accordance with claim 17 wherein the substrate is metal.
Claim 23
Dependent Claim
14 words
An article in accordance with claim 17 wherein the solid substrate is mineral aggregate.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |