Method for manufacturing a foam ru00ecgida polyurethane by reaction of an poliisocianato and a polyol in the presence of a urethane catalyst, a blowing agent,Optionally including water, a surfactant agent and silicone based polyurethane foam and composition of ru00ecgida

摘要

Method for manufacturing a foam ru00ecgida polyurethane by reaction of an poliisocianato and a polyol in the presence of a urethane catalyst, a blowing agent,Optionally including water, a surfactant agent and silicone, polyurethane foam and composition of ru00ecgida ".This is a method for the manufacture of rigid polyurethane foam using an agent expansion of C4 or C5 hydrocarbon, or mixtures of such hydrocarbons.An agent, surfactant and silicone based copolymer comprising a polyether polisiloxano represented by the following formula: (CH ~ 3 ~) ~ 3 ~ - Si - 0 - (Si (CH ~ 3 ~) ~ 2 ~ - 0) ~ x ~ - (Si (CH ~ 3 ~) (R) 0) ~ y ~ Si(CH ~ 3 ~) ~ 3 ~ where r = (CH ~ 2 ~) ~ 3 ~ - 0 - (- CH - CH ~ 2 ~ ~ 2 ~ - 0) ~ ~ - (CH ~ 2 ~ - CH (CH ~ 3 ~) ~ B ~ r) 39, 39, and when R 39 39 is h, (CH ~ 2 ~)Ch ~ 3 ~ or C (o) m ~ 3 ~; X + y + 2 is 60 to 130; and X / y is 5 - 14; Z is 0 to 4; the total molecular weight of surfactant agent, based on the formula, 7000 30.000 g / mol,% by weight of siloxane in the copolymer is 32 to 70% by weight, the average molecular weight of blend (blend average molecular weight - bamw) part of the polyether is 450 to 1000 g / mol,And% by mol of ethylene oxide in polyether is 70 to 100% by mol.