Photocurable compositions containing photobleachable ionic dye c

Details Photocurable compositions containing photobleachable ionic dye c Photocurable compositions containing photobleachable ionic dye c

1987-09-18

1990-01-23

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522 50, 522 63, 427 531, 430281, 430914, 430916, 430927, C08F 800

Patent

active

048958808

ABSTRACT:
A process for coating a substrate with an essentially colorless radiation curable composition which comprises coating said substrate with a visible light sensitive composition comprising a free radical addition polymerizable or crosslinkable material and a photobleachable ionic dye-counter ion compound capable of absorbing visible light and generating free radicals; exposing said composition to light to harden said composition; and bleaching said composition to an essentially colorless state, and photohardenable compositions containing photobleachable ionic dye-counter ion compounds as photoinitiators useful in the aforesaid process.

REFERENCES:
patent: 4307182 (1981-12-01), Dalzell et al.

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