Patent US4278804A successfully refreshed from Google Patents.
US4278804A
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US
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Ultraviolet light absorbing agents and compositions and articles containing same
Assignee: General Electric Co
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Filing: 1980-05-30
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Granted: 1981-07-14
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Expires: 2000-05-30
Abstract
Abstract There are provided ultraviolet light absorbing agents of the following general formula ##STR1## wherein: X is ##STR2## Y is H or OH, Z is H, OH, OQ or OW, where at least one Z is OH if Y is H; Q is --CH 2 (CH 2 ) n Si(R 2 ) x (OR 1 ) y ; and W is --C m H 2m+1 ; where x=0, 1 or 2, y=1, 2 or 3, x+y=3, R 1 =alkyl or alkanoyl having 1 to 6 carbon atoms, R 2 =alkyl having 1 to 6 carbon atoms, n=0, 1 or 2, and m=1 to 18. Also provided are organopolysiloxane protective coating compositions containing said ultraviolet light absorbing agents having unique utility for protecting transparent plastic articles.
Inventors
- 👤 Bruce A. Ashby
- 👤 Siegfried H. Schroeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C09; C09K; C09K3/00; C08; C08K; C08K5/00; C08K5/54; C08K5/544; C08K5/5475; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08K5/541; C08K5/5415; C08K5/5419; C09D; C09D183/00; C09D183/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR11## wherein: X is ##STR12## Y is H or OH; Z is H, OH, OQ or OW, where at least one Z is OH if Y is H; Q is --CH 2 (CH 2 ) n Si(R 2 ) x (OR 1 ) y ; and W is --C m H 2m+1 ; where x=0, 1 or 2, y=1, 2 or 3, x+y=3, R 1 =alkyl or alkanoyl having 1 to 6 carbon atoms, R 2 =alkyl having 1 to 6 carbon atoms, n=0, 1 or 2 and m=1 to 18.
Claim 2
Dependent Claim
102 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR11## wherein: X is ##STR12## Y is H or OH; Z is H, OH, OQ or OW, where at least one Z is OH if Y is H; Q is --CH 2 (CH 2 ) n Si(R 2 ) x (OR 1 ) y ; and W is --C m H 2m+1 ; where x=0, 1 or 2, y=1, 2 or 3, x+y=3, R 1 =alkyl or alkanoyl having 1 to 6 carbon atoms, R 2 =alkyl having 1 to 6 carbon atoms, n=0, 1 or 2 and m=1 to 18.
Claim 3
Dependent Claim
146 words
A compound as defined in claim 1, which is selected from: ##STR13## where Q is --CH 2 Si(OCH 3 ) 3 , --CH 2 SiCH 3 (OCH 3 ) 2 , --CH 2 Si(CH 3 ) 2 (OCH 3 ), --CH 2 (CH 2 ) 2 Si(OCH 3 ) 3 , --CH 2 (CH 2 ) 2 SiCH 3 (OCH 3 ) 2 , --CH 2 (CH 2 ) 2 Si(CH 3 ) 2 (OCH 3 ), --CH 2 (CH 2 ) 2 Si(OCOCH 3 ) 3 , --CH 2 (CH 2 ) 2 SiCH 3 (OCOCH 3 ) 2 , --CH 2 (CH 2 ) 2 Si(CH 3 ) 2 (OCOCH 3 ), --CH 2 CH 2 Si(OCH 3 ) 3 , --CH 2 CH 2 SiCH 3 (OCH 3 ) 2 , or --CH 2 CH 2 Si(CH 3 ) 2 (OCH 3 ).
Claim 4
Dependent Claim
10 words
A compound as defined in claim 2 which is 4-[γ-(triethoxysilyl)propoxy]-2-hydroxybenzophenone.
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |