US4159206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherable, abrasion resistant coating composition, method, and coated articles
Assignee: Rohm and Haas Co
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Filing: 1977-03-18
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Granted: 1979-06-26
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Expires: 1997-03-18
Abstract
Abstract A weatherable coating composition, especially for imparting abrasion resistance to thermoplastic substrates, comprising about 30-50 parts by weight of a colloidal silica and about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4. A method of applying the coating composition to a substrate and coated articles are also disclosed.
Inventors
- 👤 David C. Armbruster
- 👤 William F. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C08; C08K; C08K3/00; C08K3/34; C08K3/36; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
A weatherable abrasion-resistant coating composition comprising (A) about 30 to 50 parts by weight colloidal silica, and (B) about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane, wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4.
Claim 2
Dependent Claim
49 words
A weatherable abrasion-resistant coating composition comprising (A) about 30 to 50 parts by weight colloidal silica, and (B) about 50 to 70 parts by weight of a mixture of (i) dialkyldialkoxysilane and (ii) alkyl trialkoxysilane, wherein the weight ratio of (i) to (ii) is about 1:19 to about 1:4.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the silanes are partially hydrolyzed to silanols.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the colloidal silica has a particle size of about 50 to 400 millimicrons.
Claim 5
Dependent Claim
9 words
The composition of claim 1 further including condensation catalyst.
Claim 6
Dependent Claim
8 words
The composition of claim 1 further including water.
Claim 7
Dependent Claim
8 words
The composition of claim 1 in a solvent.
Claim 8
Dependent Claim
11 words
The composition of claim 6 wherein the solvent is an alcohol.
Claim 9
Dependent Claim
14 words
The composition of claim 1 further including a weak acid as a hydrolyzing agent.
Claim 10
Dependent Claim
13 words
The composition of claim 1 wherein the hydrolyzing agent is glacial acetic acid.
Claim 11
Dependent Claim
24 words
The composition of claim 1 wherein the dialkyldiakoxysilane is dimethyldimethoxysilane, the alkyl trialkoxysilane is methyl trimethoxysilane, further including glacial acetic acid as hydrolyzing agent.
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) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |