FIELD: chemistry.
SUBSTANCE: claimed invention relates to method of obtaining rigid polyurethane foam plastic, including (a) obtaining reaction mixture, and b) creation for reaction mixture such of such conditions that reaction mixture expands and is solidified with formation of rigid polyurethane foam plastic. Reaction mixture contains, at least, (1) mixture of initiated with amine polyol, which has average functionality from 3.3 to 4.0 and hydroxyl equivalent weight from 75 to 560, which is a product of interaction of, at least, one C2-C4 alkylene oxide with, at least, one initiating orthocyclohexanediamine compound, and , at least, one simple polyester polyol, which has average functionality from 4.5 to 7.0 and hydroxyl equivalent weight from 100 to 175, on condition that said mixture contains, at least, 5 wt % from mixture of polyols of said initiated with amine polyol, (2) water in amount from 0.5 to 3.5 wt fractions, per 100 wt fractions, polyols, (3) at least, one foaming agent, which is hydrocarbon, hydrofluorocarbon, hydrochlorofluorocarbon, fluorocarbon, dialkyl ester of fluorine-substituted dialkyl ester in amount from 10 to 40 wt fractions per 100 wt fractions, polyols, and (4) at least, one polyisocyanate.
EFFECT: obtaining rigid polyurethane foam plastic, which possesses excellent heat-insulating properties (ie low-k-factor) and characteristics of solidifying (ie low index of fluidity and short time of.
7 cl, 13 ex, 7 tbl
