Patent US3436642A successfully refreshed from Google Patents.
Patent US4229228A successfully refreshed from Google Patents.
US4229228A
Expired / Lapsed
US
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Coating composition
Assignee: Sola International Inc
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Filing: 1978-10-04
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Granted: 1980-10-21
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Expires: 1998-10-04
Abstract
Abstract A coating composition which results from hydrolyzing 35 to 70 weight percent tetraethyl orthosilicate and 60 to 20 weight percent of certain silane is useful for providing abrasion resisting coatings for plastics after curing. Optionally, up to 20 weight percent of a silane having a reactive polar site or, in the alternative, a small percentage of a surfactant may be used to provide a dyeable coated article.
Inventors
- 👤 Don H. Rotenberg
- 👤 Patricia M. Cuffe
- 👤 Bernard L. Laurin
- 👤 Peter R. Ramirez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:05
CPC Classifications
G02B1/105; C; C09; C09D; C09D183/00; C09D183/04; C09D183/06; C09D183/08; G; G02; G02B; G02B1/00; G02B1/10; G02B1/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A coating composition which is curable to provide an optically clear abrasion resistant coating, which comprises a hydrolysis product of about 35 to 45 weight percent tetraethyl orthosilicate and 55 to 45 weight percent methyltrimethoxysilane, and 5 to 15 weight percent 3-glycidoxypropyltrimethoxysilane.
Claim 2
Dependent Claim
42 words
A coating composition which is curable to provide an optically clear abrasion resistant coating, which comprises a hydrolysis product of about 35 to 45 weight percent tetraethyl orthosilicate and 55 to 45 weight percent methyltrimethoxysilane, and 5 to 15 weight percent 3-glycidoxypropyltrimethoxysilane.
Claim 3
Dependent Claim
39 words
The coating composition according to claim 1 wherein about 40 weight percent tetraethyl orthosilicate and about 50 weight percent methyltrimethoxysilane and 10 weight percent 3-glycidoxypropyltrimethoxysilane were hydrolyzed with a mixture of water, alcohol and acetic acid and then aged.
Claim 4
Dependent Claim
10 words
An ophthalmic lens coated with the composition of claim 1.
References Cited (Backward Citations)
US4024306A
Cited
US4006271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |