US4368236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone resin coating compositions
Assignee: General Electric Co
•
Filing: 1981-07-16
•
Granted: 1983-01-11
•
Expires: 2001-07-16
Abstract
Abstract An improved silicone resin abrasion resistant coating composition is provided, the coating composition having a pH in the range of from 6.8-7.8 and prepared by hydrolyzing an alkyltrialkoxysilane or aryltrialkoxysilane in an aqueous colloidal silica dispersion and adding thereto a small amount of an ultraviolet light absorbing compound, such as 2,4-dihydroxybenzophenone, to the hydrolysis product.
Inventors
- 👤 Robert B. Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C09D183/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
A solid substrate having at least one surface coated with an aqueous coating composition comprising in intimate admixture: (a) 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 , wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, wherein at least 70 weight percent of the silanol is CH 3 Si(OH) 3 ; and (b) a small amount of an ultraviolet light absorbing compound, said composition containing 10 to 50 weight percent solids, said solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, and wherein said composition has a pH of from 6.8 to 7.8.
Claim 2
Dependent Claim
131 words
A solid substrate having at least one surface coated with an aqueous coating composition comprising in intimate admixture: (a) 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 , wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, wherein at least 70 weight percent of the silanol is CH 3 Si(OH) 3 ; and (b) a small amount of an ultraviolet light absorbing compound, said composition containing 10 to 50 weight percent solids, said solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, and wherein said composition has a pH of from 6.8 to 7.8.
Claim 3
Dependent Claim
18 words
An article as defined in claim 1 wherein the solid substrate is comprised of a synthetic organic polymer.
Claim 4
Dependent Claim
14 words
An article as defined in claim 2 wherein said polymer is a transparent polymer.
Claim 5
Dependent Claim
13 words
An article as defined in claim 3 wherein said polymer is a polycarbonate.
Claim 6
Dependent Claim
12 words
An article as defined in claim 4 wherein said polycarbonate is transparent.
Claim 7
Dependent Claim
14 words
An article as defined in claim 4 wherein said polycarbonate is a poly(bisphenol-A carbonate).
Claim 8
Dependent Claim
22 words
An article as defined in claim 1 wherein the aqueous coating composition has been cured on said surface of said solid substrate.
Claim 9
Dependent Claim
27 words
An article as defined in claim 1 wherein said surface has been primed with a thermosetting acrylic emulsion prior to being coated with said aqueous coating composition.
Claim 10
Dependent Claim
25 words
An article as defined in claim 8 wherein said aqueous coating composition has been aged and contains a small amount of a polysiloxane polyether copolymer.
Claim 11
Dependent Claim
22 words
An article as defined in claim 9 wherein the ultraviolet light absorber in said aqueous coating composition is a substituted hydroxy benzophenone.
Claim 12
Dependent Claim
13 words
An article as defined in claim 10 wherein said substituted hydroxybenzophenone is 2,4-dihydroxybenzophenone.
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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |