| abstract |
Substances (I), such as 1,2-epoxides, aminoplasts, vinyl monomers or prepolymers or phenoplasts, which can be converted into higher molecular weight substances under the influence of a cationic catalyst are converted by exposure to actinic radiation in the presence of a sulfoxonium salt (11) of the formula wherein p represents zero or 1, R 6 represents an arylene or aralkylene group, R 7 represents -H or a group of the formula R 'represents an alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl group, R 9 has the same meaning as R 8 , but can also represent a dialkylamino group or, if R 8 represents an alkyl group, an arylamino group "R 10 and R" independently of one another have the same meaning as R 8 , but can also each stand for -H, r is 1, 2 or 3, Z r- denotes an r-valued anion of a protonic acid and q at p = zero means zero or for p = 1 stands for zero or 1.n n n Typical compounds II are dimethylphenylsulfoxonium hexafluorophosphate and perchlorate, dimethylphenacylsulfoxonium hexafluorophosphate and chloride, dodecylmethylbenzylsulfoxonium hexafluorophosphate and 1,4-bis- (1-oxo-2-idimethylsulfoxonium) -luoro-ethyl-benzo-etheno-ethyl-azo.n n n If I is a polyepoxide or a resol, it can be photopolymerized by means of 11 and then crosslinked by heating with a latent hot hardener. |