Patent ID: 6251963
Filing Date: 2001-06-26
Classification: B33Y,C07F,C08F,C09D

Abstract:
A photoinitiator combination comprising(a) 25-50% of by weight at least one compound of formula (I) ##STR12##R.sub.1 is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen;R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen;R.sub.3 is C.sub.1 -C.sub.20 alkyl, cyclopentyl, cyclohexyl, phenyl-C.sub.1 -C.sub.4 alkyl or a group of formula (III) ##STR13##or R.sub.3 is naphthyl, biphenylyl or an O--, S-- or N-containing 5- or 6-membered heterocyclic ring, the naphthyl, biphenylyl and O--, S-- or N-containing 5- or 6-membered heterocyclic ring radicals being unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, C.sub.1 -C.sub.4 alkylthio;R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are each independently of the others hydrogen, halogen, C.sub.1 -C.sub.20 -alkyl, cyclopentyl, cyclohexyl, C.sub.2 -C.sub.12 alkenyl, C.sub.2 -C.sub.20 alkyl interrupted by one or more non-consecutive O atoms, phenyl-C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.20 alkoxy, or phenyl that is unsubstituted or substituted by one or two C.sub.1 -C.sub.4 alkyl or/and C.sub.1 -C.sub.4 alkoxy substituents; and(b) 25-50% by weight at least one compound of formula (II) ##STR14##R.sub.1 and R.sub.2 are as defined above;R.sub.9 is C.sub.1 -C.sub.20 alkyl, cyclopentyl, cyclohexyl, phenyl-C.sub.1 -C.sub.4 alkyl, a group of formula (III), naphthyl, biphenylyl or an O--, S-- or N-containing 5- or 6-membered heterocyclic ring, the naphthyl, biphenylyl and O--, S-- or N-containing 5- or 6-membered heterocyclic ring radicals being unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, C.sub.1 -C.sub.4 -alkylthio; andR.sub.10 is C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkyl interrupted by one or more non-consecutive O atoms, C.sub.1 -C.sub.20 alkoxy, cyclopentyl, cyclohexyl, phenyl-C.sub.1 -C.sub.4 alkyl, a group of formula (III), naphthyl, biphenylyl or an O--, S-- or N-containing 5- or 6-membered heterocyclic ring, the naphthyl, biphenylyl and O--, S-- or N-containing 5- or 6-membered heterocyclic ring radicals being unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, C.sub.1 -C.sub.4 alkylthio.