A compound including at least one copper II complex of a material selected from the group of imidazole and imidazole derivatives is provided for use in a gas generant composition. The executing threads use the further register to improve execution performance and prevents the switching of execution to another thread while the internal register is in use. A polyester as a curing agent of an epoxy resin composition having an aromatic polyhydroxy coumpound residue including an aryloxycarbonyl group at the molecule of the terminal, an aromatic polyvalent hydrocarbon group residue, and bulky structure, is used.