| abstract |
The invention relates to acylphosphine compounds, processes for their preparation and their use. The acylphosphine compounds have the general formula in which R 'represents an alkyl radical, a cycloalkyl radical, an optionally substituted phenyl or naphthyl radical or a heterocyclic ring; R 1 has the meaning of R ', where R' and R 2 can be identical or different from one another or R 1 and R 2 are linked to form a ring, R 3 is an at least disubstituted phenyl, naphthyl, pyridyl, Furyl, pyrrolyl or thienyl radical, which has at least at the two carbon atoms adjacent to the point of attachment to the carbonyl group the substituents A and B, which may be the same or different and represent alkyl, alkoxy or alkylthio radicals, cycloalkyl radicals, phenyl radicals or halogen atoms or R 3 for grouping stands, where the radicals C and D have the same meaning as A and B.n n n They can be prepared from acid halide and phosphide or silylphosphine and used as photoinitiators in photopolymerizable compositions. |