| abstract |
Isocyanate-terminated prepolymers can be cured with di- and triamino-s-triazines of formula ##STR1## where R is ##STR2## --S--R 5 ; --O--R 6 or ##STR3## where at least one of R 1 , R 2 , R 3 and R 4 is hydrogen; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are hydrogen or an optionally substituted aromatic or aliphatic group and n R' is the divalent residue of an organic diamine, the residue of an organic diisocyanate, or the residue of an organic diepoxide. |