Aminobenzophenones and photopolymerizable compositions including the same

A substantially non-mutagenic photopolymerizable composition which is substantially free of epoxy resin and comprising a photopolymerizable compound and a substantially non-mutagenic photoinitiator having photoinitiation activity similar to that exhibited by 4,4′-bis(dimethylamino)benzophenone under similar conditions, said photoinitiator having the formula

• 6
• 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 —(CH2)n′—OC(O)—CR′H═CH2, wherein n′ is an integer from 1 to 10 and R′ is H or lower alkyl, polymerizable maleimide moiety, and oligomeric moiety, with the proviso that no more than three A are the same 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.