THIOXANTHONECARBOXYLIC ACIDS AND THIOXANTHONECARBOXYLIC ACID DERIVATIVES

摘要

Novel thioxanthonecarboxylic acids and thioxanthonecerboxylic acid derivatives of the formula I (I) in which Y is -COOH, -CO-halogen, -CN or a carboxylic acid ester, thioester or amide group and X, Z and W are as defined in the patent claim, are described, The compounds of the formula I in which Y is other than -CO-halogen are suitable as sensitisers for photo-crosslinkable polymers or as initiators for photo-polymerisation of ethylerically unsaturated compounds or for photo-chemical crosslinking of polyoleilns, The acid halides of the formula I are starting materials for the preparation of the corresponding nitriles and carboxylic acid esters, thioesters and amides.