5-sulfonyl-substituted benzotriazole UV-absorbers
First Claim
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1. A compound of formula I, II or III ##STR8## wherein R1 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or phenylalkyl of 7 to 15 carbon atoms,R2 is straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or phenylalkyl of 7 to 15 carbon atoms;
- said alkyl substituted by one or more --OH, --OR4 or --NH2 groups where R4 is alkyl of 1 to 12 carbon atoms;
n is 1;
R5 is --OR6 or --NH2 ;
R6 is hydrogen or alkyl of 1 to 24 carbon atoms;
or said alkyl substituted by one or more --OH groups;
or --OR6 is --(OCH2 CH2)w OH or --(OCH2 CH2)w OR21 where w is 1 to 12 and R21 is alkyl of 1 to 12 carbon atoms,R3 is alkyl of 8 to 18 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms,L is --SO-- or --SO2 --, andT is --SO--, --SO2 --, --SO--E--SO-- or --SO2 --E--SO2 --,where E is alkylene of 2 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, or alkylene interrupted or terminated by cyclohexylene of 8 to 12 carbon atoms.
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Abstract
2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a sulfoxide or sulfone group exhibit enhanced absorption in the near visible range (over 350 nm) allowing said compounds to be particularly effective in protecting polymer systems which are prone to degradation caused by actinic irradiation with wavelengths over 350 nm.
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Citations
4 Claims
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1. A compound of formula I, II or III ##STR8## wherein R1 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or phenylalkyl of 7 to 15 carbon atoms,
R2 is straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms or phenylalkyl of 7 to 15 carbon atoms; - said alkyl substituted by one or more --OH, --OR4 or --NH2 groups where R4 is alkyl of 1 to 12 carbon atoms;
n is 1;
R5 is --OR6 or --NH2 ;
R6 is hydrogen or alkyl of 1 to 24 carbon atoms;
or said alkyl substituted by one or more --OH groups;
or --OR6 is --(OCH2 CH2)w OH or --(OCH2 CH2)w OR21 where w is 1 to 12 and R21 is alkyl of 1 to 12 carbon atoms,R3 is alkyl of 8 to 18 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms, L is --SO-- or --SO2 --, and T is --SO--, --SO2 --, --SO--E--SO-- or --SO2 --E--SO2 --, where E is alkylene of 2 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, or alkylene interrupted or terminated by cyclohexylene of 8 to 12 carbon atoms. - View Dependent Claims (2, 3, 4)
- said alkyl substituted by one or more --OH, --OR4 or --NH2 groups where R4 is alkyl of 1 to 12 carbon atoms;
Specification