Thermosetting resin and its production

摘要

A thermosetting resin which is a linear copolymer having a molecular weight of 10,000 to 1,000,000 and a glass transition point of -30 DEG to +80 DEG C., obtained by polymerizing in an aqueous medium a monomer mixture comprising (1) 0.1 to 50% by weight of at least one polymerizable monomer having an ampho-ionic structure, selected from the group consisting of (i) compounds representable by the formula: [I] wherein R1 is a hydrogen atom or a methyl group, R2 and R3 are each, the same or different, a C1-C6 alkyl group, A is O or NH, m1 and n1 are each, the same or different, an integer of 1 to 12 and X(-) is SO3(-), SO4(-) or CO2(-) and (ii) compounds representable by either one of the formulae: [II] and [III] wherein R4 is a hydrogen atom or a methyl group, R5 is a hydrogen atom or a C1-C3 alkyl group, m2 is an integer of 0 to 6 and n2 is an integer of 1 to 6, and A and X- are as defined above, (2) 0.5 to 70% by weight of at least one polymerizable monomer containing a reactive amide group, representable by the formula: [IV] wherein R6 is a hydrogen atom or a methyl group and R7 is a hydrogen atom or a C1-C4 alkyl group and (3) 1 to 99.4% by weight of at least one of other polymerizable monomers.