Ultraviolet light absorbing agents and compositions and articles containing same
AssigneeGeneral Electric Company
InventorsBruce A. Ashby, Siegfried H. Schroeter
Life of this patent
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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.sub.2 (CH.sub.2).sub.n Si(R.sub.2).sub.x (OR.sub.1).sub.y ; and W is --C.sub.m H.sub.2m+1 ; where x=0, 1 or 2, y=1, 2 or 3, x+y=3, R.sub.1 =alkyl or alkanoyl having 1 to 6 carbon atoms, R.sub.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.
Claims3
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.sub.2 (CH.sub.2).sub.n Si(R.sub.2).sub.x (OR.sub.1).sub.y ;
- and
- W is --C.sub.m H.sub.2m+1 ;
- where x=0, 1 or 2, y=1, 2 or 3, x+y=3,
- R.sub.1 =alkyl or alkanoyl having 1 to 6 carbon atoms,
- R.sub.2 =alkyl having 1 to 6 carbon atoms, n=0, 1 or 2 and m=1 to 18.
Dependencies are inferred from the claim text.