Visible photosensitizers for photopolymerizable compositions

Details Visible photosensitizers for photopolymerizable compositions Visible photosensitizers for photopolymerizable compositions

1992-11-10

1993-10-26

RoDee, Christopher D.

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, 430920, 430922, 430923, 430924, 430 2, 522 26, 522 28, G03C 172, G03F 7031

Patent

active

052565203

ABSTRACT:
Photopolymerizable compositions containing photoinitiator systems that absorb in the visible are disclosed. The photopolymerizable compositions contain at least one ethylenically unsaturated monomer capable of free radical initiated addition polymerization and a photoinitiator system capable of being activated by actinic radiation. The photoinitiator system comprises a hexaarylbisimidazole, a chain transfer agent, and a sensitizer given by the formulae A or B wherein X and R.sub.1 -R.sub.13 are as defined herein. ##STR1##

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R. Lemke, Arylidene Isophorones: Preparation and Properties of a Halocromic Polymethine System, Chem. Ber. 103, 1168-1170 (1970).
G. Kabas, The Condensation of Aromatic Aldehydes with Isophorone, Tetrahedron, 22, 1213-1218 (1966).

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