Satisfactory reactivity/possesses stability ratio the thermosetting metaplasia epoxy resin type

摘要

PURPOSE: To obtain the subject resin system having a ratio of reactivity at an elevated temperature to stability at a moderately elevated temperature by admixing an epoxy resin, a polycarboxylic acid anhydride and a specific curing accelerator. ;CONSTITUTION: There is provided a heat-curable epoxy resin system comprising (A) at least one epoxy resin, (B) at least one polycarboxylic acid anhydride and (C) a curing accelerator comprising 1,4-diazabicyclo(2.2.2)octane or a 1-14C alkyl substituted derivative of 1,4-diazabicyclo(2.2.2)octane, a part of the curing accelerator (C) being replaced by (D) a complex of a boron halide with an amine. As the D complex, there can be exemplified one represented by the formula [wherein X is an amine of H₂NR¹ or NR¹R²R³ (wherein R¹-R³ are each 1-18C alkyl, 3-18C cycloalkyl, 6-18C aralkyl, 6-18C aromatic group or the like); and Hal is F or Cl]. The abovementioned curing accelerator has a more balanced ratio of reactivity/stability than conventional curing accelerators.;COPYRIGHT: (C)1995,JPO