METHOD FOR PREPARING RIGID URETHANE-MODIFIED FOAM POLYISOCYANURATES

摘要

FIELD: organic chemistry, chemical technology. ^ SUBSTANCE: invention relates to a method for synthesis of rigid urethane-modified foam polyisocyanurates. Method involves reaction of organic polyisocyanate with polyfunctional component possessing reaction capacity with respect to isocyanate groups at isocyanate index in the range from 150 to 450%. Reaction is carried out in the presence of carboxylic acid, water foam forming agent and/or hydrocarbon, and/or fluorohydrocarbon and metal salt as a trimerization catalyst taken in the amount in the range from 0.5 to 5 wt.-% as measured for the composition possessing reaction capacity with respect to isocyanate groups. Invention provides design of system providing good conversion degree to isocyanurate and obtaining good refractoriness. ^ EFFECT: improved method of synthesis. ^ 12 cl, 3 tbl, 10 ex