Abstract
The intermolecular compound of 2, 4-diamino-6-vinyl-s-triazine and isocyanuric acid was synthesized and chemical reactivity of the compound with diglycidyl ether of bisphenol A (DGEBA) was studied using infrared spectroscopy. DGEBA reacted with amino groups of 2, 4-diamino-6-vinyl-s-triazine and isocyanuric acid at the curing condition of 150°C and formed a cured compound. The reduction rate of IR absorption intensity based on epoxide was considerably larger than that of the reaction of DGEBA with 2, 4-diamino-6-vinyl-s-triazine alone.
The reduction was accelerated by the addition of imidazole compounds. It was estimated from the results of IR spectroscopy that isocyanuric acid reacted with epoxide to form an isocyanurate compound and then be converted to an oxazolidone compound on the curing process. Theintermolecular compound of 2, 4-diamino-6-ethyl-s-triazine and isocyanuric acid reacted with epoxide in the presence of imidazole compounds in a similar way as the above intermolecular compound, but the resulting compound contained an oxazolidone ring in larger amount than the product for the above intermolecular compound. The reaction of epoxide with isocyanuric acid did not take plase with the intermolecular compound of melamine and isocyanuric acid.
