Thioxanthonecarboxylic acid esters, thioesters and amides

Details Thioxanthonecarboxylic acid esters, thioesters and amides Thioxanthonecarboxylic acid esters, thioesters and amides

1982-09-23

1985-03-19

Bleutge, John C.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

430922, C08F 250

Patent

active

045057940

ABSTRACT:
Thioxanthonecarboxylic acid esters, thioesters or amides of the formula I ##STR1## in which X and Z are hydrogen or one of the substituents defined in more detail in claim 1 and Y is --OR.sub.1, --SR.sub.1 or --N(R.sub.1)(R.sub.2), in which R.sub.1 is C.sub.1-24 alkyl and R.sub.2 is H or R.sub.1, are suitable, if desired together with amines, as initiators for the photopolymerization of ethylenically unsaturated compounds or for photochemical crosslinking of polyolefines. They are also used as sensitizers for photocrosslinkable polymers. They can be prepared by methods known per se, for example by cyclization of phenylthio-phthalic, -isophthalic or -terephthalic acids, which can be correspondingly substituted, and subsequent reaction with suitable alcohols, thiols or amines.

REFERENCES:
patent: 3642997 (1972-02-01), Shen et al.
patent: 3759807 (1973-09-01), Osborn et al.
patent: 3904647 (1975-09-01), Pfister et al.
patent: 3981887 (1976-09-01), Gante et al.
patent: 4097283 (1978-06-01), Asano et al.
patent: 4103015 (1978-07-01), Hodson et al.
patent: 4418138 (1983-11-01), Curtis
1972-1976 Chem. Substance Index (Chem. Abstract p. 38465cs).

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