Patent ID: 6054252
Filing Date: 2000-04-25
Classification: C08F,C08L,G03F

Abstract:
A negative-acting photoimageable composition, comprising:I) a binder polymer having sufficient acid functionality to render said photoimageable composition developable in alkaline aqueous solution;II) either absent or a photopolymerizable material for said binder polymer; and,III) a photoinitiator chemical system, wherein said binder polymer comprises a backbone having between about 10 and 90 mol. % anhydride residues, said anhydride residues being half-esterified to at least about 10 mol % total of said anhydride residues with a hydroxy-functional momomer or oligomer, all or a portion of said half-esterification being with a (meth)acrylate-functional hydroxy-terminated oligomer having the formula: ##STR4## wherein (A), (B) and (C) are in any order, (A) comprises a chain formed of between about 1 and 40, linear or branched. unsubstituted or substituted, alkoxylate monomers having between about 1 and 20 carbon atoms,(B) is either absent or comprises a chain formed of between about 1 and 40, linear or branched, unsubstituted or substituted, alkoxylate monomers having between about 1 and 20 carbon atoms, the monomer composition of (B) being different than the monomer composition of (A), (A) plus (B) being formed from at least 2 monomers,(C) comprises a chain formed of between about 1 and 40, linear or branched, unsubstituted or substituted, lactone monomers having between about 2 and 21 carbon atoms.