INITIATOR SYSTEM FOR RADIATION CURABLE COMPOSITIONS, RADIATION CURABLE COMPOSITIONS CONTAINING SUCH AN INITIATOR SYSTEM, A PROCESS FOR CURING SAID COMPOSITIONS AND PRODUCTS COVERED THEREWITH

摘要

In the initiator system are incorporated:
a) a photoinitiator, with the exception of a compound of the formula:

wherein R1 = H or an alkyl group, an alkenyl group, a cycloalkyl or cycloalkenyl group; an aryl group, a furfuryl group or the group

where Y represents a methyl group and Z an alkyl group or Y and Z together form a 1,3- or 1,4-alkylene group having 3 to 4 carbon atoms; R2 = an alkyl group or alkenyl group, a cycloalkyl group or cycloalkenyl group, an alkaryl grup 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 saturated or nearly saturated.
The initiator system cures rapidly and has good storage stability.