Oxime ester photoinitiators

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 409/14 (2006.01) B41C 1/00 (2006.01) B41N 1/12 (2006.01) C07D 209/86 (2006.01) C07D 335/16 (2006.01) C08F 2/50 (2006.01) G03F 7/031 (2006.01) G02B 5/20 (2006.01) G11B 7/244 (2006.01)

Patent

CA 2684931

Compounds of the formula (I), wherein A1 is formula (II); A2 is formula (III); A3 is formula (IV); A4 is formula (V); w, x, y and z independently of each other are an integer from 0-4, provided that the sum of x+y+z is an integer from 2-4, corresponding to the valency of Q; M1, M2, M3 and M4 for example are a direct bond, CO or O; Y for example is a direct bond or S; Q is a (x+y)-valent linking group; R1 is for example hydrogen, C1-C20alkyl or phenyl or naphthyl; R2 and R"2 for example are is hydrogen or C1-C20alkyl; R3, R4, R'3, R'4, R"3 and R"4 for example are hydrogen, halogen, phenyl, or C1-C20alkyl; and R24 is for example a direct bond; exhibit an unexpectedly good performance in photopolymerization reactions.

L'invention concerne des composés représentés par la formule (I), dans laquelle A1 est la formule (II); A2 est la formule (III); A3 est la formule (IV); A4 est la formule (V); w, x, y et z sont indépendamment un entier compris entre 0 et 4, à condition que la somme de x + y + z soit un entier compris entre 2 et 4, correspondant à la valence de Q; M1, M2, M3 et M4 sont par exemple une liaison directe, CO ou O; Y est par exemple une liaison directe ou S; Q est un groupe de liaison à valence (x+y); R1 est par exemple hydrogène, C1-C20 alkyle, phényle ou naphtyle; R2 et R'2 sont par exemple hydrogène ou C1-C20alkyle; R3, R4, R'3, R'4, R'3 et R'4 sont par exemple hydrogène, halogène, phényle, ou C1-C20 alkyle; et R24 est par exemple une liaison directe. Ces composés présentent une efficacité étonnamment bonne dans des réactions de photopolymérisation.

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