Patent ID: 6329123
Filing Date: 2001-12-11
Classification: C08G,C08L,G03F,Y10S

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) an addition-polymerizable non-gaseous .alpha.,.beta.-ethylenically unsaturated compound(s) capable of forming a high polymer by free-radical initiated chain-propagating addition polymerization; andIII) a radiation-sensitive free-radical generating photoinitiator chemical system activatable by actinic radiation to initiate chain-propagating addition polymerization of the addition-polymerizable material, wherein all or a portion of said component II) comprises a (meth)acrylate functional urethane oligomer having the formula:T--I--(--P'--I--).sub.q --Twhere I at each independent occurrence is a radical of the formula: ##STR13##where R is a polyvalent aliphatic, cycloaliphatic, or aromatic hydrocarbon group; T at each independent occurrence is selected from a (meth)acrylate-functional radical of the formula: ##STR14##where R.sup.1 is a hydrogen atom or a methyl group, A, B and E are in the order given or in any order, A is an alkylene oxide group of the formula: --[--(CH.sub.2).sub.n --O--]-- where n is an integer from 1 to 20 and x is an integer from 1 to 40, B is an alkylene oxide group of the formula: --[--(CH.sub.2).sub.n1 --O--]-- where n1 is an integer from 1 to 20 and y is an integer from 0 to 40 with the alkylene oxide group of B being different from that of A, and A plus B being formed from at least 2 alkylene oxide groups, and E is a ring-opened lactam group of the formula: ##STR15##where n2 is an integer from 1 to 20 and R.sup.2 is a hydrogen atom or a C.sub.1-18 alkyl radical, or E is a mixture of the ring-opened lactam group and a ring-opened lactone group of formula: ##STR16##where n2 is as defined above and z is an integer from 1 to 40; P is of the formula: --[O--G--]-- where G is of the formula: --(A).sub.s1 --(B).sub.s2 --(E).sub.s3 --(D).sub.f --(W).sub.k --(J).sub.u --(B).sub.s4 --(A).sub.s5 -- where A, B, E and R are defined above, f is 0 or 1, k is 0 or 1 and u is 0 or 1, D is a diester functional alkoxy radical of the formula: ##STR17##where t is an integer from 1 to 40, W is a radical of the formula: ##STR18##where V is an acidic group selected from --COOH, --SO.sub.3 H, and PO.sub.3 HR.sup.2 where R.sup.2 is a hydrogen atom or a C.sub.1-18 alkyl radical, J is an ester functional alkyl radical of the formula: ##STR19##where t1 is an integer from 1 to 6, and, with the proviso that if f+k+u=0, then .SIGMA.s.sub.1 . . . s.sub.5 must be .gtoreq.1.