US4315046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for securing primerless adhesion of silicone resin coating composition to cast acrylics
Assignee: General Electric Co
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Filing: 1980-07-17
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Granted: 1982-02-09
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Expires: 2000-07-17
Abstract
Abstract Neutral to basic silicone resin abrasion resistant coating compositions can be adherently secured to cast acrylic plastic substrates without a primer if the substrate is provided with a wash coat of glacial acetic acid shortly before being coated with said silicone resin composition.
Inventors
- 👤 Robert B. Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:06
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05D3/00; B05D3/10; B05D3/101; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2333/00; C08J2483/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
In process for forming an adherent, abrasion-resistant coating on unprimed cast acrylic substrate, the steps comprising: (i) applying to said substrate a wash coating of glacial acetic acid and draining said wash coating for from 2 to 5 minutes. (ii) thereafter applying a coating composition comprising a dispersion of colloidal silica in an 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, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 40% solids, said solids consisting essentially of 10 to 70 weight % colloidal silica and 30 to 90 weight % of the partial condensate and wherein said composition has a pH of from 7.1 to about 7.8.
Claim 2
Dependent Claim
144 words
In process for forming an adherent, abrasion-resistant coating on unprimed cast acrylic substrate, the steps comprising: (i) applying to said substrate a wash coating of glacial acetic acid and draining said wash coating for from 2 to 5 minutes. (ii) thereafter applying a coating composition comprising a dispersion of colloidal silica in an 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, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 , said composition containing 10 to 40% solids, said solids consisting essentially of 10 to 70 weight % colloidal silica and 30 to 90 weight % of the partial condensate and wherein said composition has a pH of from 7.1 to about 7.8.
Claim 3
Dependent Claim
20 words
A process is defined in claim 1 wherein said composition also includes a small amount of a polysiloxane polyether copolymer.
Claim 4
Dependent Claim
14 words
A process defined in claim 1 wherein said coating is cured on the substrate.
Claim 5
Dependent Claim
31 words
A process as defined in claim 1 wherein said aqueous coating composition contains about 20% solids, the partial condensate is of CH 3 Si(OH) 3 and the aliphatic alcohol is methanol.
Claim 6
Dependent Claim
17 words
A process as defined in claim 1 wherein the pH is from about 7.2 to about 7.8.
Claim 7
Dependent Claim
33 words
A process as defined in claim 2 wherein said polysiloxane polyether copolymer is present in an amount of from about 2.5 to about 15% by weight of the total solids of the composition.
Claim 8
Dependent Claim
14 words
A process as defined in claim 1 wherein said cast acrylic substrate is transparent.
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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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |