Acylphosphine oxide compounds

Abstract

Abstract Acylphosphine oxide compounds of the general formula ##STR1## where R 1 is alkyl, cyclohexyl, cyclopentyl, aryl which is unsubstituted or substituted by halogen, alkyl or alkoxy, or an S-containing or N-containing five-membered or six-membered heterocyclic radical, R 2 has one of the meanings of R 1 (but R 1 and R 2 may be identical or different), or is alkoxy, aryloxy or aralkoxy, or R 1 and R 2 together from a ring, and R 3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, a cycloaliphatic radical of 3 to 12 carbon atoms, phenyl or naphthyl which are alkyl-, alkoxy- or thioalkoxy-substituted, or an S-containing or N-containing five-membered or six-membered heterocyclic radical, and may contain additional functional groups, or is the group ##STR2## where R 1 and R 2 have the above meanings and X is phenyl or an aliphatic or cycloaliphatic divalent radical of 2 to 6 carbon atoms, and one or more of the radicals R 1 to R 3 may be olefinically unsaturated, a process for the preparation of these acylphosphine oxide compounds from acid halides of the general formula ##STR3## where X is chlorine or bromine, and a phosphine of the general formula ##STR4## and the use of the acylphosphine oxides as photoinitiators in photopolymerizable compositions.

Inventors

• 👤 Peter Lechtken
• 👤 Ingolf Buethe
• 👤 Anton Hesse

Bibliographic Details