Thioxanthonecarboxylic acids, esters thioesters and amides with reactive functional groups and polymers prepared therefrom and having thioxanthone radicals as side chains
First Claim
1. A polymer which has a mean molecular weight of not less than 1000 and which contains, in side chains, thioxanthone groupings of the formula I'"'"' ##STR63## in which n is the number 1 or 2, X is hydrogen, halogen, --CN, --OH, --SH, --NH2, --NO2, phenylsulfonyl or alkylsulfonyl, alkyl, alkoxy, alkylthio, N,N-dialkylamino or --CO-alkyl having, in each case, 1-4C atoms in the alkyl moieties, Z is hydrogen, halogen, --OH, --SH or alkyl, alkoxy, alkylthio or N,N-dialkylamino having, in each case, 1-4C atoms in the alkyl moieties, Y is --OR1 --, --SR1 -- or --N(R2)R1 --, R1 is straight-chain or branched alkylene having a total of 2-23C atoms and 2-13C atoms in the main chain, cyclopentylene, cyclohexylene, phenylene ##STR64## or --(CH2 CH2 O)x --CH2 CH2 --, R2 is hydrogen or straight-chain or branched alkyl having a total of 1-23C atoms and 1-13C atoms in the main chain, G is --CH2 --, --CH2 CH2 --, --C(CH3)2 --, --O--, --SO2 -- or --NH-- and x is an integer from 1 to 5, the proportion of groupings of the formula I'"'"' being not less than 2 percent, based on the number of recurring structural elements in the polymer.
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Abstract
Thioxanthone carboxylic acid esters, thioesters and amides with reactive functional groups of the formula ##STR1## in which X, Y, Z, n and Q are as defined in the patent claim and Q is, for example, --OCH═CH2, --OCH2 CH═CH2, --SCH2 CH═CH2 or --NHCH2 CH═CH2 (n=1), --OH, --SH, --NH2, --COOH, --COCl or --OCO--C(R")═CH2, in which R" is methyl or hydrogen (n=2), are suitable for the preparation of polymers with thioxanthone radicals in side chains. The compounds (I) and also the polymers which can be prepared therefrom can be employed as sensitizers for photocrosslinkable polymers or as initiators, if desired in a mixture with amines, for the photopolymerization of ethylenically unsaturated compounds or for the photochemical crosslinking of polyolefines.
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Citations
5 Claims
- 1. A polymer which has a mean molecular weight of not less than 1000 and which contains, in side chains, thioxanthone groupings of the formula I'"'"' ##STR63## in which n is the number 1 or 2, X is hydrogen, halogen, --CN, --OH, --SH, --NH2, --NO2, phenylsulfonyl or alkylsulfonyl, alkyl, alkoxy, alkylthio, N,N-dialkylamino or --CO-alkyl having, in each case, 1-4C atoms in the alkyl moieties, Z is hydrogen, halogen, --OH, --SH or alkyl, alkoxy, alkylthio or N,N-dialkylamino having, in each case, 1-4C atoms in the alkyl moieties, Y is --OR1 --, --SR1 -- or --N(R2)R1 --, R1 is straight-chain or branched alkylene having a total of 2-23C atoms and 2-13C atoms in the main chain, cyclopentylene, cyclohexylene, phenylene ##STR64## or --(CH2 CH2 O)x --CH2 CH2 --, R2 is hydrogen or straight-chain or branched alkyl having a total of 1-23C atoms and 1-13C atoms in the main chain, G is --CH2 --, --CH2 CH2 --, --C(CH3)2 --, --O--, --SO2 -- or --NH-- and x is an integer from 1 to 5, the proportion of groupings of the formula I'"'"' being not less than 2 percent, based on the number of recurring structural elements in the polymer.
Specification