| abstract |
PROBLEM TO BE SOLVED: To improve long-term storage stability of a resin composition when blended with a resin without impairing the action of the hydrazide group-containing copolymer as a resin crosslinking or curing agent. A containing copolymer is provided. A crosslinking or curing agent for a resin comprising a hydrazide group-containing copolymer represented by formula (1) as an active ingredient, and a resin composition containing the same. [Chemical 1] [Wherein, A, B and D represent a hydrogen atom or a lower alkyl group. E represents ammonium or an organic amine. l, m, n and o are as follows. 1 mol% ≦ l ≦ 99 mol%, 1 mol% ≦ m ≦ 99 mol%, 0 mol% ≦ n ≦ 98 mol%, 1 mol% ≦ o ≦ 98 mol%, l + m + n + o = 100 mol%] |