Flame-retardant polyurethane foam and polyol composition therefor

摘要

A polyol composition comprisingPP(a) a polyether polyol with an average molecular weight of 2,000 to 10,000, P P(b) an adduct of a carboxylic acid having not less than 8 carbon atoms with ethylene oxide or both ethylene oxide and propylene oxide andPP(c) a diol with an average molecular weight of 62 to 400, having one or more primary hydroxyl groups;PP in a ratio of (88 to 98):(2 to 8):(0 to 4) by weight is suitable for the production of flame-retardant flexible polyurethane foam and a flame- retardant flexible polyurethane foam produced by reactingP P(i) the above polyol composition withPP(ii) a polyisocyanatePPin the presence ofPP(iii) water,PP(iv) both a foam-setting agent for slab foam and a foam-setting agent for HR foamPP(v) both a metal- containing catalyst and a tertiary amine catalyst andPP (vi) a flame retardant comprising a triarylphosphatePPnot only has an excellent flame retardant effect but also causes no discoloration of the foam-covering material.