Patent ID: 6770686
Filing Date: 2004-08-03
Classification: C08G,C09D,G03F

Abstract:
Photocationic initiator combination comprising(a) at least one 2,4,6-triarylpyrylium salt of the general formula (I) wherein Xâˆ’ denotes a non-nucleophilic anion and Ar1, Ar2 and Ar3 independently of one another in each case denote a phenyl group of the general formula (II) or a biphenyl group of the general formula (III), wherein R1 to R8 independently of one another in each case denote hydrogen or an alkyl or alkoxy group with 1 to 12 carbon atoms, and(b) at least one electron donor that forms cations under the action of light in the presence of the aforementioned 2,4,6-triarylpyrylium salt, wherein the electron donor is (i) a combination of an aromatic olefin and an aromatic carbonyl compound with in each case at least two unsubstituted phenyl groups or C1-C12-alkyl or C1-C12- alkoxy substituted phenyl groups and/or (ii) a radical forming peroxy or azo compound.