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US4436924A Expired / Lapsed US ⏱️ 0.0 years remaining

Ultraviolet light absorbing agents and compositions and articles containing same

Assignee: General Electric Co
•
Filing: 1982-09-23
•
Granted: 1984-03-13
•
Expires: 2002-09-23
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Abstract

Abstract There are provided ultraviolet light absorbing agents of the following general formula ##STR1## wherein: ##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. This invention relates to new, improved ultraviolet light absorbing agents, as well as to articles primed and thereafter coated with compositions containing such agents. The novel compounds of this invention are silanolreactive alkoxysilyl- or alkanoyloxysilylalkyl ether adducts of aromatic ultraviolet absorbing agents.

Inventors

  • 👤 Bruce A. Ashby
  • 👤 Siegfried H. Schroeter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 06:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; C08K5/5419; 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; C09; C09D; C09D183/00; C09D183/04

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 87 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR11## wherein ##STR12## Y is OH; Z is H, OH, OQ or OW; 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 87 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR11## wherein ##STR12## Y is OH; Z is H, OH, OQ or OW; 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 94 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR13## wherein: ##STR14## Y is H; Z is H, OH, OQ or OW, where at least one Z is OH; 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 4
Dependent Claim 94 words
An ultraviolet light absorbing agent, comprising a compound having the formula: ##STR13## wherein: ##STR14## Y is H; Z is H, OH, OQ or OW, where at least one Z is OH; 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 5
Dependent Claim 11 words
A compound as defined in claim 2, wherein Z is OH.

References Cited (Backward Citations)

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US3489781A Cited
USRE27281E Cited
US3395116A Cited
US3708225A Cited
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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) 1987-03-13 1987-09-12 1988-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-03-13 1991-09-12 1992-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-03-13 1995-09-12 1996-03-13 $7700.00 Window Closed / Lapsed

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