| abstract |
PURPOSE: To obtain an adhesive having excellent storage stability as well as excellent adhesive strength, by blending an epoxy resin with a novel imidazole acid addition salt used a curing (accelerating) agent. n CONSTITUTION: An epoxy resin is blended with a novel imidazole acid addition salt expressed by formula I (R 1 is H, 1W18C alkyl, etc.; R 2 is H, phenyl, etc.; R 3 and R 4 are H or benzyl; n is 1 or 2) used as a curing (accelerating) agent to provide the adhesive. Further more, as the compound expressed by formula I, e.g. 2,6-dihydroxybenzoic acid addition salt of 2-phenyl-4-methyl-imidazole. The compound expressed by formula I is e.g. obtained by melting and blending an imidazole expressed by formula II with a hydroxy-benzoic acid expressed by formula III at a molar ratio of 0.7W1.3 times mol. while heating. n COPYRIGHT: (C)1989,JPO&Japio |