Water-soluble photoinitiators

Details Water-soluble photoinitiators Water-soluble photoinitiators

1986-10-10

1989-04-25

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430919, 430921, 430923, 522 34, 522 55, 522 57, 522 65, 522 66, 522 68, G03C 500, G03C 168

Patent

active

048247650

ABSTRACT:
Substituted dibenzalketones useful as water-soluble photoinitiators have the formula: ##STR1## wherein R.sup.1 and R.sup.2 are 4, alkyl or, taken together, an aliphatic ring, n=0 or an integer and R.sup.3 and R.sup.4 either are both water-solubilizing groups (a) --X(CH.sub.2).sub.m N.sup.+ R.sup.5.sub.3, (b) --X(CH.sub.2).sub.m COO.sup.- M or (c) --X(CH.sub.2).sub.m SO.sup.-.sub.3 M.sub.5 or one is such a group and the other is (d) a group --NR.sup.5.sub.2, X is --CH.sub.2 --, --O-- or --S--, R.sup.5 is an alkyl group, M is H.sup.+ or a metal cation and m=0. Such a photoinitiator compound is associated with a polymerizable compound in an aqueous photopolymerizable composition.

REFERENCES:
patent: 3600436 (1971-08-01), Kuhn et al.
patent: 4290870 (1981-09-01), Kondoh et al.
patent: 4576975 (1986-03-01), Reilly, Jr.

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