| 摘要 |
A crosslinking agent or a curing agent for resins, the agent containing as an active component a polyacrylic hydrazide having an average molecular weight of 10,000 to 150,000, a hydrazide conversion ratio of at least 30% and 85 or more hydrazide groups in one molecule and a polyacrylic hydrazide having an average molecular weight of 20,000 to 30,000 and 50,000 to 150,000. |
