METHOD FOR PREPARING POLYMER-POLYOL, POLYOL DISPERSED COMPOSITION, ELASTIC URETHANE FOAM AND MOLDED ARTICLE Russian patent published in 2005 - IPC

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing polymer-polyol involving carrying out two stages at increased temperature and pressure. On the first stage polyester of mixture of polyesters of molecular mass 2000-6000 Da and the primary hydroxyl content 40-80% is mixed with a monomer in the reactor volume in laminar regimen. Catalyst is added to the prepared mixture moving in turbulent regimen in tube packing of external contour, and flow is recovered into reactor wherein adduct is prepared at stirring and under conditions of laminar regimen. On the second stage a monomer and catalyst are added to the prepared adduct moving in turbulent regimen in tube packing of external contour of reactor and after mixing in turbulent regimen is fed into reactor wherein under mixing conditions polymer-polyol is prepared. Monomer is taken among the group including styrene, α-methylstyrene, butadiene, acrylonitrile, acrylate, vinylidene chloride or their mixture. Also, invention relates to the polyol dispersed composition, elastic urethane foam and the molded article. Invention provides preparing polymer-polyol with stable sizes of polymeric particles and the le odor-free polyol composition and urethane foam and the molded article with the enhanced carrying capacity.

EFFECT: improved preparing method.

6 cl, 3 tbl, 8 ex