POLYURETHANE COMPOSITION FOR PREPARING LOW-MODULE ELASTOMERS Russian patent published in 2000 - IPC

FIELD: chemistry of polymers, more particularly preparation of low-module elastomers. SUBSTANCE: polyurethane comprises toluylene diisocyanate, oligoestertriol with molecular weight of 2000 and oligoesterdiol with molecular weight of 2000 at oligoesterdiol to oligoestertriol molar ratio from 0.05- 0.95 to 0.10:0.90 at ratio between NCO groups of diisocyanate and OH groups of mixture of oligoesters of 0.8-1.1 mole/mole. The resulting elastomers have ultimate tensile strength of 6.5-12.5 MPa, tensile elongation of 780-1250%, elasticity module during 100% deformation of 0.8-1.1 MPa and shore A hardness of 20-50 conventional units. EFFECT: improved properties of the polyurethane composition. 1 ex, 5 tbl