Patent ID: 7531580

Claim:
A process for producing a gasket molding material applicable to an automatic coating robot, consisting of a UV-curable liquid polyurethane resin having a viscosity (25°) of 150,000-1,000,000 mPa·s, which comprises subjecting (A) a polycarbonatediol having a molecular weight of 500-5,000, (B) a trifunctional alcohol, and (C) a diisocyanate to reaction in the presence of (D) a (meth)acrylate compound represented by the general formula CH 2 ═CRCO(OC n H 2n ) p R′ (where R is a hydrogen atom or a methyl group, R′ is a hydrogen atom, an alkoxyl group, or a phenoxy group, n is an integer of 1-12, and p is an integer of 1-5), or the general formula CH 2 ═CRCO(OC m H 2m ) q OCOCR═CH 2 (where R is a hydrogen atom or a methyl group, m is an integer of 2-12, and q is an integer of 1-14), and (E) a di(meth)acrylate compound of alkylene glycol whose alkylene group is substituted by a lower alkyl group having 1 to 5 carbon atoms, and by adding (F) a hydroxyl group-containing (meth)acrylate to the resulting solution of urethane oligomers in (meth)acrylate, thereby carrying out terminal (meth)acrylating reaction of the urethane oligomers.