Process for the preparation of graft polymer dispersions and...

Details Process for the preparation of graft polymer dispersions and... Process for the preparation of graft polymer dispersions and...

C - Chemistry, Metallurgy

08

F

400/3025, 403/41

C08F 283/06 (2006.01) C08F 291/08 (2006.01) C08F 299/02 (2006.01) C08G 18/63 (2006.01)

Patent

CA 1268877

1289-3 PROCESS FOR THE PREPARATION OF GRAFT POLYMER DISPERSIONS AND FLAME-RETARDANT POLYURETHANE FOAMS Abstract of the Disclosure Graft polymer dispersions in polyoxyalkylene poly- ether polyols are employed together with flame retardant compounds to prepare flame retardant polyurethane foams. The polymer dispersions employ less than 0.1 mole of induced unsaturation per mole of polyol mixture. Processes for the preparation of these polymer dispersions employ fumarate derived polyetherester polyols or polyetherester polyols prepared by reacting a polyoxyalkylene polyether polyol with a compound selected from the group consisting of maleic acid, maleic anhydride and fumaric acid and an alkylene oxide in the presence of salts and oxides of divalent metals. The polymer dispersions are prepared in the presence of a reaction modera- tor and employ 50 weight percent or more of acrylonitrile.

521514

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