Photopolymerizable composition with acylphosphine sulfide photoi

Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy

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20415918, 20415924, 430910, 430921, 546 21, 548412, 549 5, 549 6, 549216, 568 15, C08F 250

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active

045226938

ABSTRACT:
Acylphosphine sulfides of the formula ##STR1## where R.sup.1 is alkyl, cycloalkyl or an unsubstituted or substituted phenyl, naphthyl or heterocyclic radical; R.sup.2 has the meaning of R.sup.1 and can be identical to or different from R.sup.1, or is alkoxy, unsubstituted or substituted phenoxy or phenoxyalkyl, or R.sup.1 or R.sup.2 are linked together to form a ring, which may contain further alkyl substituents and fused-on benzene rings; R.sup.3 is alkyl, a cycloaliphatic radical, substituted phenyl, an unsubstituted or substituted naphthyl or heterocyclic radical or the group ##STR2## where X is unsubstituted or substituted phenylene or an aliphatic or cycloaliphatic divalent radical; and where one or more of R.sup.1, R.sup.2 and R.sup.3 may be olefinically unsaturated.
These acylphosphine sulfides can be prepared from acylphosphines and sulfur and can be used as photoinitiators in photopolymerizable compositions.

REFERENCES:
patent: 3399213 (1968-08-01), Osborne
"Spectroscopic", Osaki et al., Bull. Chem. Soc., Japan 1973, 46(6), 1803-1806.
Calvert et al., "Photo Chemistry", Wiley & Sons 1966, pp. 488-492.

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