Ketocoumarins as photoinitiators and photosensitizers in printing inks and coatings

摘要

A series of novel ketocoumarin photoinitiators are disclosed for use in radiation curing.

主权项

1. A compound of formula (I): where: R is an alkyl or alkoxy substituents; A=—CH2—R1—(CH2)n—[O(CHR2CHR3)a]y—, where
n=0 or 1a=1 to 2R1=—C═O or —CH(OH)—y=0 to 10,one of R2 and R3 represents a hydrogen atom and the other represents a hydrogen atom, methyl group or ethyl group; Q is a residue selected from the group consisting of: monohydroxy compounds having from 1 to 6 hydroxy groups, polyhydroxy compounds having from 1 to 6 hydroxy groups, and C2-C12 polyalkylene glycols in which the alkylene part has from 2 to 12 carbon atoms; and x is an integer from 1 to 6.