FIELD: insulation of heat-, gas- and oil pipelines, refrigerating plants in various building projects. SUBSTANCE: described is rigid polyurethane foam by reacting polyetherpolyol mixture comprising oxypropylated saccharose, oxypropylated glycerol, oxypropylated ethylene diamine, polyisocyanate, organosilicon foam stabilizer, foaming agents, and glycidol catalyst, ratios of components is as follows, wt parts: oxypropylated saccharose, 30-50; oxypropylated glycerol, 20-30; oxypropylated ethylene diamine, 30-40; water, 1.5-3.0; organosilicon foam stabilizer, 1.2-1.8; perfluoropentane (coalant 141B). 2-15; glycidol, 3-5; polyisocyanate 200- 280. EFFECT: high strength characteristics, high heat resistance (up to 220 C) and low water absorption of rigid polyurethane foams. 1 tbl
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