Photoinitiator compositions containing disulfides and photoharde

Details Photoinitiator compositions containing disulfides and photoharde Photoinitiator compositions containing disulfides and photoharde

1991-11-19

1993-07-27

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430281, 430920, 522 25, 522 26, 522 27, 522 54, G03C 173, G03F 7031

Patent

active

052309827

ABSTRACT:
A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound, an ionic dye/reactive counter ion complex capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of the polymerizable or crosslinkable compound, and a disulfide represented by the structure ##STR1## wherein X is selected from the group consisting of S and O except in a specific case in which the disulfide is derived from one or more tetrazolyl groups; n represents 0 or 1; A represents the residue of the ring containing the N, C and X atoms, the ring containing five or six members and, in addition, said ring members may be fused to an aromatic ring; and R.sup.5 is an aromatic radical selected from the group consisting of (i) phenyl, (ii) benzothiazolyl, (iii) benzoxazolyl, (iv) tetrazolyl, (v) pyridinyl, (vi) pyrimidinyl, (vii) thiazolyl, (viii) oxazolyl, (ix) quinazolinyl, and (x) thiadiazolyl, each of which may have a substituent on one or more C or N atoms of the ring.

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