FIELD: polymeric compounds. SUBSTANCE: method involves interaction of prepolymer with isocyanate diamines taken from the group involving 4,4′-methylene -bis- (2,5-dichloro-6- ethylaniline), 4,4′-methylene -bis- (3-chloro-2,6- diethylaniline), 4,4′-methylene -bis- (5-chloro-2-methyl -6-isopropylaniline), 4,4′-methylene -bis-(3- chloro-2-methyl -6-isopropylaniline), 4,4′-methylene -bis-(3-chloro -2,6-di-sec. -butylaniline), 4,4′-methylene -bis-(5-chloro -2-methyl-6- sec.-butylaniline) and 4,4′-methylene -bis-(5-chloro -2-methyl-6-ethylaniline). Lengtheners were added to reaction as a single by conventional method used for polyurethane production. Method is used for producing noncarcinogenic and nonmutagenic polyurethanes containing urea-groups in chain. EFFECT: improved method of synthesis. 2 tbl
