POLYMERS FROM INTERMEDIATES OBTAINED FROM HYDROGEN-CYANIDE

This paper presents results of an experimental program in which several compounds obtained from hydrogen cyanide and cyanogen have been used to make new polyamides of high performance. The 1- and 2-methyl-1,2,3-triazole-4,5-dicarbonyl chlorides have been polarized interfacially to form high-melting polyamides of good heat stability. Interfacial polymerization of 1-methylimidazole-4,5-dicarbonyl chloride and trans-2,5-dimethylpiperazine has given a polyamide that is water-soluble. The 2,6- and 2,3-pyrazinedicarbonyl chlorides have been similarly converted to high-melting polyamides. 2,6-Dicyano-3,5-dipiperazinylpyrazine has been prepared from tetracyanopyrazine and piperazine and reacted with toluene diisocyanate to form a strong, stiff polyurea.