Patent US4177315A successfully refreshed from Google Patents.
US4177315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated Polymeric substrates
Assignee: EIDP Inc
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Filing: 1978-06-16
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Granted: 1979-12-04
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Expires: 1998-06-16
Abstract
Abstract Abrasion resistant coatings of silica and a partially polymerized organic silanol of the formula RSi(OH) 3 having rapid cure times are obtained when the pH of the composition is maintained at greater than 6.0, and preferably 6.2 or greater.
Inventors
- 👤 Richard W. Ubersax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:16
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/05; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
A polymeric film substrate coated to a thickness of about from 1 to 20 microns with a rapidly curing composition comprising (a) about from 5 to 50 weight percent solids, the solids comprising about from 10 to 70 weight percent silica and about from 90 to 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH) 3 , wherein R is selected from methyl and up to about 40% of a radical selected from the group consisting of vinyl, phenyl, γ-glycidoxypropyl, and γ-methacryloxypropyl, and (b) about from 95 to 50 weight percent solvent, the solvent comprising about from 10 to 90 weight percent water and about from 90 to 10 weight percent lower aliphatic alcohol, the coating composition having a pH of about from 6.2 to 6.5.
Claim 2
Dependent Claim
131 words
A polymeric film substrate coated to a thickness of about from 1 to 20 microns with a rapidly curing composition comprising (a) about from 5 to 50 weight percent solids, the solids comprising about from 10 to 70 weight percent silica and about from 90 to 30 weight percent of a partially polymerized organic silanol of the general formula RSi(OH) 3 , wherein R is selected from methyl and up to about 40% of a radical selected from the group consisting of vinyl, phenyl, γ-glycidoxypropyl, and γ-methacryloxypropyl, and (b) about from 95 to 50 weight percent solvent, the solvent comprising about from 10 to 90 weight percent water and about from 90 to 10 weight percent lower aliphatic alcohol, the coating composition having a pH of about from 6.2 to 6.5.
Claim 3
Dependent Claim
14 words
A coated article of claim 1 wherein the substrate consists essentially of polyethylene terephthalate.
Claim 4
Dependent Claim
14 words
A coated article of claim 1 wherein the substrate consists essentially of polymethylmethacrylate sheeting.
Claim 5
Dependent Claim
14 words
A coated article of claim 1 wherein the substrate consists essentially of polycarbonate sheeting.
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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |