Borate coinitiators for photopolymerization

Details Borate coinitiators for photopolymerization Borate coinitiators for photopolymerization

1996-11-21

1999-09-14

Baxter, Janet

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430325, 430914, 430916, 522 7, 522 6, G03C 500, C08F 246

Patent

active

059521520

ABSTRACT:
Compounds of the formula I or I' ##STR1## in which R.sub.1 and R.sub.2 independently of one another, for example, are an aromatic hydrocarbon, with the proviso that the aromatic hydrocarbon radical is substituted in at least one o-position, or R.sub.1 and R.sub.2, for example, independently of one another are C.sub.1 -C.sub.20 alkyl, which is substituted by R.sub.9 R.sub.10 R.sub.11 Si; R.sub.2a is, for example, a divalent aromatic hydrocarbon radical; R.sub.3 is C.sub.1 -C.sub.20 alkyl which is substituted by R.sub.9 R.sub.10 R.sub.11 Si or is an aromatic hydrocarbon; R.sub.4 is, for example, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.12 cycloalkyl or phenyl-C.sub.1 -C.sub.6 alkyl; E is R.sub.14 R.sub.15 R.sub.16 P or R.sub.8 R.sub.8a R.sub.7 N; R.sub.7, R.sub.8 and R.sub.8a and R.sub.9, R.sub.10 and R.sub.11 independently of one another are, for example, C.sub.1 -C.sub.12 alkyl; R.sub.14, R.sub.15 and R.sub.16 independently of one another are substituted phenyl and G is a radical which is able to form positive ions, with the proviso that, if R.sub.1, R.sub.2 and R.sub.3 are 2,4,6-trimethylphenyl, R.sub.4 is not C.sub.2 -C.sub.20 alkyl or C.sub.2 -C.sub.8 alkenyl, are suitable for use as particularly reactive photoinitiators.

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