C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 5/02 (2006.01) C07F 7/10 (2006.01) C07F 9/54 (2006.01) C08F 2/50 (2006.01) C09B 23/06 (2006.01) C09B 57/00 (2006.01) C09D 5/32 (2006.01) G03F 7/029 (2006.01)
Patent
CA 2191050
Compounds of the formula I or I' Image (I) Image (I') in which R1 and R2 independently of one another, for example, are an aromatic hydrocarbon, with the proviso that the aromatic hydrocarbon radical is substituted in at least one o-position, or R1 and R2, for example, independently of one another are C1-C20alkyl, which is substituted by R9R10R11Si; R2a is, for example, a divalent aromatic hydrocarbon radical; R3 is C1-C20alkyl which is substituted by R9R10R11Si or is an aromatic hydrocarbon; R4 is, for example, C1-C20alkyl, C3-C12cycloalkyl or phenyl-C1-C6alkyl; E is R14R15R16P or R8R8aR7N; R7, R8 and R8a and R9, R10 and R11 independently of one another are, for example, C1-C12alkyl; R14, R15 and R16 independently of one another are substituted phenyl and G is a radical which is able to form positive ions, with the proviso that, if R1, R2 and R3 are 2,4,6-trimethylphenyl, R4 is not C2-C20alkyl or C2-C8alkenyl, are suitable for use as particularly reactive photoinitiators.
Cunningham Allan Francis
Kunz Martin
Kura Hisatoshi
Ag Ciba-Geigy
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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