Patent US5148159A successfully refreshed from Google Patents.
US4170690A
Expired / Lapsed
US
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Process of coating weatherable, abrasion resistant coating and coated articles
Assignee: Rohm and Haas Co
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Filing: 1977-12-12
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Granted: 1979-10-09
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Expires: 1997-12-12
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
2026-10-31 06:48
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
A method of making a weatherable abrasion-resistant coated substrate comprising adding a dilute acid hydrolyzing agent and a condensation catalyst to a composition comprising (A) about 30-50 parts by weight colloidal silica, and (B) about 50-70 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; and applying the resultant colloidal suspension to a substrate, then curing at a temperature of about 70°-160° C.
Claim 2
Independent Claim
81 words
A method of making a weatherable abrasion-resistant coated substrate comprising adding a dilute acid hydrolyzing agent and a condensation catalyst to a composition comprising (A) about 30-50 parts by weight colloidal silica, and (B) about 50-70 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; and applying the resultant colloidal suspension to a substrate, then curing at a temperature of about 70°-160° C.
Claim 3
Dependent Claim
50 words
An article comprising a substrate coated with a cured composition comprising (A) about 30-50 parts by weight colloidal silica, and (B) about 50-70 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 4
Dependent Claim
50 words
An article comprising a substrate coated with a cured composition comprising (A) about 30-50 parts by weight colloidal silica, and (B) about 50-70 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 5
Dependent Claim
13 words
An article in accordance with claim 2 wherein the substrate is a thermosplastic.
Claim 6
Dependent Claim
12 words
An article in accordance with claim 5 wherein the thermoplastic is acrylic.
Claim 7
Dependent Claim
11 words
An article in accordance with claim 3 wherein the thermoplastic polycarbonate.
Claim 8
Dependent Claim
14 words
An article in accordance with claim 3 wherein the thermoplastic is cellulose acetate butyrate.
Claim 9
Dependent Claim
15 words
A method in accordance with claim 1 wherein the silanes are partially hydrolyzed to silanols.
Claim 10
Dependent Claim
21 words
A method in accordance with claim 1 wherein the colloidal silica has a particle size of about 50 to 400 millimicrons.
Claim 11
Dependent Claim
11 words
A method in accordance with claim 1 further including condensation catalysts.
Claim 12
Dependent Claim
10 words
A method in accordance with claim 1 further including water.
Claim 13
Dependent Claim
11 words
A method in accordance with claim 1 further including a solvent.
Claim 14
Dependent Claim
13 words
A method in accordance with claim 11 wherein the solvent in an alcohol.
Claim 15
Dependent Claim
16 words
A method in accordance with claim 1 further including a weak acid as a hydrolyzing agent.
Claim 16
Dependent Claim
14 words
Method in accordance with claim 1 wherein the hydrolyzing agent is glacial acetic acid.
Claim 17
Dependent Claim
24 words
Method in accordance with claim 1 wherein the dialkyl dialkoxy silane is dimethyl dimethoxy silane and the alkyl trialkoxy silane is methyl trimethoxy silane.
Claim 18
Dependent Claim
27 words
An article comprising the weatherable abrasion-resistant coated substrate made in accordance with the method of claim 1, 7, 8, 9, 10, 11, 12, 13, 14, or 15.
Claim 19
Dependent Claim
15 words
An article in accordance with claim 16 wherein the substrate is either acrylic or polycarbonate.
Claim 20
Dependent Claim
13 words
A method in accordance with claim 1 wherein the substrate is a thermoplastic.
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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |