A thermoset epoxy composition, comprising the cured product of a thermosetting epoxy composition comprising: 100 parts by weight of an epoxy resin composition comprising one or more epoxy resins, each independently having an epoxy equivalent weight of at least 2; 30-200 parts by weight of an aromatic dianhydride curing agent of the formula
wherein T is as provided herein; and 0.1- 5 parts by weight of a heterocyclic accelerator, based on the total parts by weight of the epoxy resin composition and the aromatic dianhydride curing agent, wherein the heterocyclic accelerator comprises a substituted or unsubstituted C3-6 heterocycle comprising 1-4 ring heteroatoms, wherein each heteroatom is independently the same or different, and is nitrogen, oxygen, phosphorus, silicon, or sulfur, preferably nitrogen, oxygen, or sulfur, more preferably nitrogen, wherein the aromatic dianhydride curing agent is soluble in the epoxy resin composition, and the curable epoxy composition does not contain a monoanhydride.
                            一种热固性环氧组合物,包括一种热固性环氧组合物的固化产物,该组合物包括100 重量份的环氧
树脂组合物,其中包括一种或多种环氧
树脂,每种环氧
树脂的环氧当量至少为 2; 30-200 重量份的芳香族二酐固化剂,其式为
其中 T 如本文所述;以及 0.以环氧
树脂组合物和芳香族二酐固化剂的总重量为基准,1-5 份(按重量计)杂环
促进剂, 其中杂环
促进剂包括取代或未取代的 C3-6 杂环,该杂环包含 1-4 个环杂环原子、其中每个杂原子独立地相同或不同,并且是氮、氧、
磷、
硅或
硫,优选氮、氧或
硫,更优选氮,其中芳香族二酐固化剂可溶于环氧
树脂组合物,且可固化的环氧
树脂组合物不含单酸酐。