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US 5,288,917 AGranted
Liquid photoinitiator mixtures
AssigneeCiba-Geigy Corporation
InventorsGodwin Berner, Franciszek Sitek, Rinaldo Husler
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Abstract
Liquid highly active photoinitiators are obtained by dissolving a solid photoinitiator of the titanocene type in liquid photoinitiators of the acetal or ketal type. The liquid mixtures have a long dark storage stability.
Claims2
A compound of the formula I ##STR14## in which Ar.sup.1 and Ar.sup.2 are independently of each other phenyl or C.sub.1 -C.sub.4 -alkyl- or halogen-substituted phenyl,
- R.sup.1 is a group of the formula --CH.sub.2 CH.sub.2 O].sub.m (C.sub.10 -C.sub.16 -alkyl) or --CH.sub.2 CH.sub.2 O).sub.m C.sub.6 H.sub.4 --(C.sub.7 -C.sub.10 -alkyl), in which m is a value from 2-20, and
- R.sup.2 is C.sub.1 -C.sub.4 -alkyl or has the meaning given for R.sup.1.
Dependencies are inferred from the claim text.