Patent ID: 6781015
Filing Date: 2004-08-24
Classification: C07C,C08F,G03F

Abstract:
A method for making a polymer with substantially no mutagenic leachates comprising exposing a composition which is substantially free of epoxy resin, comprising a photopolymerizable compound comprising at least one ethylenically unsaturated double bond to ultraviolet radiation in the presence of a substantially non-mutagenic photoinitiator having photoinitiation activity similar to that exhibited by 4,4â€²-bis(dimethylamino)benzophenone under similar conditions, said photoinitiator having the formula wherein:each A is independently selected from the group consisting of hydrogen, lower alkyl, cycloalkyl, aryl, lower alkanol, lower alkoxy, halogen, sulfonyl, alkylsulfonyl, trihaloalkyl, trihaloalkoxy, trihaloalkylthio, polymerizable moiety â€”(CH2)nâ€²â€”OC(O)â€”CRâ€²H&boxH;CH2, wherein nâ€² is an integer from 1 to 10 and Râ€² is H or lower alkyl, polymerizable maleimide moiety, and oligomeric moiety, with the proviso that at least one A is not lower alkyl; each R is independently selected from the group consisting of hydrogen, lower alkyl, cycloalkyl, aryl, lower alkanol, lower alkoxy, halogen, sulfonyl, alkylsulfonyl, trihaloalkyl, trihaloalkoxy, trihaloalkylthio, polymerizable moiety, and oligomeric moiety; and n is an integer from 1 to 4.