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US 5,532,112 AGranted
Coreactive photoinitators
AssigneeCiba-Geigy Corporation
InventorsManfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans L. Hirsch
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Abstract
Compounds of the formula RG--A--IN wherein IN is a photoinitiator basic structure A is a spacer group and RG is a functional reactive group can be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
Claims1
A process for photopolymerizing a radiation curable system by attaching a photoinitiator of the formula:
- RG--A--IN
- in which
- IN is of the formula ##STR35## , wherein
- R is CR.sub.3 R.sub.4 R.sub.5,
- R.sub.3, R.sub.4 in each case independently of one another are H,C.sub.1 -C.sub.12 alkyl,C.sub.1-C.sub.12 alkoxy, phenyl or together form C.sub.2 -C.sub.6 alkylene,
- R.sub.5 is -OR.sub.7,
- R.sub.7 H or C.sub.1 -C.sub.6 alkyl,
- A is a spacer group Z[(CH.sub.2).sub.o Y].sub.n -[(CH.sub.2).sub.m X].sub.l, wherein
- X is --O--,
- Y is --O--,--NH--or --O--CO--,
- Z is a single bond, --NH--, --NHCO--or--CONH--,
- l is 1
- m is an integer from 1 to 4,
- o is an integer from 0 to 4,
- n is 1, if Y is --O--CO-- and
- n is an integer from 0 to 4, if Y is --O-- or --NH--,
- RG is (R.sub.e).sub.3 Si--or N.sub.3 -- and
- R.sub.e is C.sub.1 -C.sub.12 alkoxy,
- directly to a substrate with the reactive group RG by heating, applying at least one ethylenically unsaturated compound and subjecting said radiation curable system to activating radiation with wavelengths from 250-500 nm.
16 more elements
Dependencies are inferred from the claim text.