FIELD: polymer production. SUBSTANCE: rigid polyurethane foam is prepared by interaction of polyisocyanates with compounds having at least two isocyanate-reactive hydrogen atoms in presence of non-halogenated saturated hydrocarbons as foaming agent and, if needed, special additives. More particularly, polyisocyanates interact with compound having molecular weight 150 to 15000 and bearing tertiary nitrogen atom in its molecule. EFFECT: increased solubility of non-halogenated saturated hydrocarbons in polyols resulting in simplified processing of polyols in production of rigid polyurethane foams. 8 cl, 4 ex
