POLYURETHANE COMPOSITION Russian patent published in 2002 - IPC

FIELD: polymer materials. SUBSTANCE: invention relates to cast polyurethane elastomers and can be used in manufacture of tires and other rubber products operated within a wide temperature range under heavy- duty alternating loadings. Composition contains polyetherdiol based on mixture of polyoxyteramethylene glycol, polyethylene glycol adipate, and diethylene glycol at their molar ratio (0.72-0.595):(0.18-0.27):(0.1-0.15), respectively, 2,4-toluylene diisocyanate and 3,3'-dichloro-4,4'-diaminodiphenylmethane. Elastomers prepared according to invention show high physicomechanical characteristics: stretching strength, tear resistance, relative elongation, and hardiness 92-95 relative units. EFFECT: improved quality of elastomers. 2 tbl, 16 ex