US4372835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silane-functionalized ultraviolet screen precursors
Assignee: General Electric Co
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Filing: 1982-01-28
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Granted: 1983-02-08
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Expires: 2002-01-28
Abstract
Abstract Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R 1 is C 1 -C 6 alkyl, R 2 is C 1 -C 6 alkyl or C 2 -C 6 alkanoyl, R 3 is hydrogen or C 1 -C 6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding α-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.
Inventors
- 👤 Rack H. Chung
- 👤 William D. Kray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C09; C09D; C09D4/00; C08J2483/00; Y; Y10; Y10S; Y10S522/00; Y10S522/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A radiation curable coating composition comprising: (A) 100 parts by weight of an acid hydrolysis product of an alkoxy-functional silane; (B) 10 to 1,000 parts by weight of (i) an acryloxy-functional silane; (ii) a glycidoxy-functional silane; or (iii) a mixture of (i) and (ii); (C) a catalytic amount of a photoinitiator; and (D) from 2 to 15 parts by weight of a silane-functionalized ultraviolet agent precursor compound selected from compounds of the formulae: ##STR14## (iv) a mixture of any of the foregoing, wherein R is ##STR15## R 1 is C 1 -C 6 alkyl, R 2 is C 1 -C 6 alkyl or C 2 -C 5 alkanoyl, R 3 is hydrogen or C 1 -C 6 alkoxyl, x is 0, 1 or 2, y is 1, 2 or 3, and x+y=3.
Claim 2
Dependent Claim
132 words
A radiation curable coating composition comprising: (A) 100 parts by weight of an acid hydrolysis product of an alkoxy-functional silane; (B) 10 to 1,000 parts by weight of (i) an acryloxy-functional silane; (ii) a glycidoxy-functional silane; or (iii) a mixture of (i) and (ii); (C) a catalytic amount of a photoinitiator; and (D) from 2 to 15 parts by weight of a silane-functionalized ultraviolet agent precursor compound selected from compounds of the formulae: ##STR14## (iv) a mixture of any of the foregoing, wherein R is ##STR15## R 1 is C 1 -C 6 alkyl, R 2 is C 1 -C 6 alkyl or C 2 -C 5 alkanoyl, R 3 is hydrogen or C 1 -C 6 alkoxyl, x is 0, 1 or 2, y is 1, 2 or 3, and x+y=3.
Claim 3
Dependent Claim
57 words
A solid substrate having at least one surface coated with the composition as defined in claim 1, said coating composition having been cured on said surface of said solid substrate by ultraviolet radiation in an amount effective to cross-link components (A) and (B) and then to substantially completely convert component (D) to an active ultraviolet screening agent.
Claim 4
Dependent Claim
14 words
A solid substrate as defined in claim 2 which comprises a transparent aromatic polycarbonate.
Claim 5
Dependent Claim
13 words
A solid substrate as defined in claim 3 which comprises poly(bisphenol A carbonate).
Claim 6
Dependent Claim
21 words
A radiation curable coating composition as defined in claim 1 wherein the ultraviolet agent precursor compound is of the formula: ##STR16##
Claim 7
Dependent Claim
34 words
A radiation curable coating composition as defined in claim 1 wherein the ultraviolet agent precursor compound is of the formula: ##STR17## wherein R 2 is --CH 3 , or --CH 2 CH 3 .
Claim 8
Dependent Claim
33 words
A radiation curable coating composition as defined in claim 1 wherein the ultraviolet light precursor compound is of the formula: ##STR18## wherein R 2 is --CH 3 or --CH 2 CH 3 .
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |