FIELD: chemistry.
SUBSTANCE: microporous polyurethane elastomers are obtained from a reaction mixture which contains water as a foaming agent and an auxiliary ingredient selected from one or more of the following compounds: 1,2-trans-dichloroethylene, propyl propionate, one or more hydrocarbons having boiling point from 100 to 250°C and flash point higher than 30°C. The microporous polyurethanes have shrinkage characteristics similar to those of polyurethanes foamed with R-134a. Despite the presence of the auxiliary ingredient, the prescribed polyol component in many cases has flash point higher than 65°C and is classified as non-inflammable according to ISO 1523.
EFFECT: invention enables to replace R-134a with water without requiring different forms.
8 cl, 6 tbl, 9 ex
