HYBRID POLYESTER-POLYETHER POLYOLS FOR IMPROVED DEMOLD EXPANSION IN POLYURETHANE RIGID FOAMS
摘要
The present invention discloses polyester-polyether polyols suitable for blending with other polyols or other materials mutually compatible with the polyester polyols to achieve polyurethane and polyisocyanurate products. In particular the present invention discloses polyester-polyether polyols produced by the reaction of: 1) phthalic anhydride with an alcohol having a nominal functionality of 3 and a molecular weight of 90 to 500 under conditions to form a phthalic anhydride half-ester; and 2) alkoxylating the half-ester formed in step 1 to form a polyester-polyether polyol having a hydroxyl number of from 200 to 350; with the proviso when the alcohol is a polyether polyol, the polyether polyol contains at least 70 weight percent of polyoxypropylene.
申请公布号
WO2013053555(A2)
申请公布日期
2013.04.18
申请号
WO2012EP67641
申请日期
2012.09.10
申请人
DOW GLOBAL TECHNOLOGIES LLC;JIMENEZ, JORGE;SHUTOV, PAVEL L.;FELSTED, WILLIAM N., II;ROSE, MELISSA M.;MICHELETTI, DAVIDE
发明人
JIMENEZ, JORGE;SHUTOV, PAVEL L.;FELSTED, WILLIAM N., II;ROSE, MELISSA M.;MICHELETTI, DAVIDE