PROCESS FOR PREPARING ELASTOMERS Russian patent published in 1994 - IPC

FIELD: manufacture of sealants, coatings and foundry products. SUBSTANCE: when preparing elastomers, the product of reaction of liquid oligomers having reactive groups and a diisocyanate in a 1.0: (3.4-4.0) molar ratio respectively is treated with a mixture of a liquid diene oligomers having end hydrozide or hydrazone groups and an aromatic diamine in a (0.2-1.0): (1.2-2. ) molar ratio respectively. The curing operation is accomplished in a mold 20-2 C for 21 hr. EFFECT: improved quality of elastomers. 12 tbl