abstract |
A cross-linking agent comprising a compound having at least two acyclic acid anhydride groups, represented by general formula (I) wherein R represents a C₂-C₅₀ monovalent hydrocarbon group and R' represents a C₂-C₅₀ divalent hydrocarbon group, provided that both R and R' may contain ether, urethane or ester linkage; and n represents an integer of 1 to 500. A curable composition comprising (A) at least one resin component selected from the group consisting of (i) a resin having at least one epoxy group and at least one hydroxyl group per molecule, (ii) a resin mixture comprising a resin having at least two epoxy groups per molecule and another resin having at least two hydroxyl groups per molecule and (iii) a resin having at least two epoxy groups per molecule, and (B) the above cross-linking agent. |