Initiator system for radiation curable compositions,...

Details Initiator system for radiation curable compositions,... Initiator system for radiation curable compositions,...

C - Chemistry, Metallurgy

08

J

252/121, 402/263

C08J 3/28 (2006.01) C08F 2/50 (2006.01)

Patent

CA 1169043

ABSTRACT A new initiator system for radiation curable compositions is disclosed. In said system there are incorporated : a) a photoinitiator, with the exception of a compound of the formula: Image where R1 =H or an alkyl group, an alkenyl group, a cycloalkyl or cycloalkenyl group, an aryl group, a furfuryl group or the group Image where Y represents a methyl group and 2 an alkyl group or Y and Z together form a 1,3- or 1,4- alkylene group having 3 or 4 carbon atoms; R2 = an alkyl group or alkenyl group, a cycloalkyl group or cycloalkenyl group, an alkaryl group or a furfuryl group; R3 and R4 may be the same or different and represent a hydrogen, a chlorine or a bromine atom or a phenyl group, an alkyl group or alkoxy group, or a dialkyl amino group; b) a synergistic amount of a Na, K and/or Li-salt of an organic acid having at least 4 carbon atoms which is compatible with the curable compositions, and c) a solvent for component b in such an amount that the solution of salt b in the curable compositions is just about sturated or nearly saturated. The initiator system cures rapidly and has good storage stability.

374043

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