METHOD OF PREPARING STABLE CONDENSATION PRODUCTS USING AN ALCOHOL-ALKYLENE OXIDE TREATMENT AND PRODUCTS THEREFROM

摘要

METHOD OF PREPARING STABLE CONDENSATION PRODUCTS USING AN ALCOHOL-ALKYLENE OXIDE TREATMENT AND PRODUCTS THEREFROM Products which are phosphorus containing oligomers having linkages between phosphorus atoms and which are obtained by the self-condensation of .beta.-haloalkyl esters of pentavalent phosphorus acids or by condensation of these esters with an alkyl ester of a pentavalent phosphorus acid are treated with an alcohol having the formula ROH wherein R is a C1-C20 alkyl group or a substituted alkyl group and then with an alkylene oxide for a period of time after residual acidity has been neutralized, e.g., by treatment with an alkylene oxide, which is sufficient to enable the alcohol and the alkylene oxide to act upon labile groups contained in the condensed product and to neutralize any further acidity generated by the opening of such groups. The stabilized product formed by this process when incorporated in a polyurethane foam gives a foam having superior green strength to a foam containing a condensed oligomer which is not so treated.