Method of preparing stable condensation products by solvent extr

Details Method of preparing stable condensation products by solvent extr Method of preparing stable condensation products by solvent extr

1974-08-05

1976-06-08

Raymond, Richard L.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260 25AJ, 260 25AR, 260 457P, 260927R, 260978, 260983, 260989, 260990, C07F 909, C07F 940

Patent

active

039623742

ABSTRACT:
Products which are phosphorus containing oligomers having ##EQU1## linkages between phosphorus atoms and which are obtained by the self-condensation of .beta.-haloalkyl esters of pentavalent phosphorus acids or by the condensation of these esters with an alkyl ester of a pentavalent phosphorus acid are extracted with an inert organic solvent. The soluble portion of said products after recovery from the solvent can be incorporated in a polyurethane foam formulation to give a foam which will have less scorching than a foam containing the original condensation product that has not been extracted.

REFERENCES:
patent: 3641202 (1972-02-01), Biranowski et al.
patent: 3822327 (1974-07-01), Weil
patent: 3855359 (1974-12-01), Weil

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