| 摘要 |
Substances (I) capable of being converted into higher-molecular weight materials under the influence of a cationic catalyst, such as 1,2-epoxides, aminoplasts, vinyl monomers and prepolymers, or phenoplasts, are so converted by exposure to actinic radiation in the presence of an aryl- or aroyl- carbamoylsulfoxonium salt (II) of formula <IMAGE> where p is zero or 1, q is 1 to 4, Ar denotes an aromatic group, R6 denotes -H or group -COR9 or -CONH(CO)rR10, R7 denotes an alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aryl, or aralkyl group, R8 has the same meaning as R7 but may alternatively represent a dialkylamino group or, if R7 denotes alkyl, it may alternatively represent an arylamino group, R9 and R10 each denote a saturated or ethylenically unsaturated radical, r is zero or 1, t is 1, 2, or 3, and Zt- denotes a t-valent anion of a protic acid. Typical salts (II) are acetanilinodimethylsufoxonium hexafluorophosphate, benzoylcarbamoyldimethylsulfoxonium hexafluorophosphate, 3,4-dichloracetanilinodimethylsulfoxonium hexafluoroarsenate, 2,4-bis(dimethylsulfoxoniummethylcarbamoyl)-toluene dihexafluorophosphate, 4-methylacetanilinodimethylsulfoxonium chloride, and tris(acetanilinodimethylsulfoxonium) orthophosphate. When I is a polyepoxide or a resol, it may be photopolymerized by means of II and subsequently crosslinked by heating with a latent heat-curing agent.
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