Method of preparing stable condensation products using a water-a

Details Method of preparing stable condensation products using a water-a Method of preparing stable condensation products using a water-a

1974-05-28

1976-05-25

Raymond, Richard L.

Chemistry of carbon compounds

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

260 25AJ, 260 25AR, 260978, 260983, C07F 908

Patent

active

039594149

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 the condensation of these esters with alkyl esters of a pentavalent phosphorus acid are treated after residual acidity has been neutralized, e.g., with an alkylene oxide, with water and then with an alkylene oxide for a period of time which is sufficient to enable the water to open labile groups contained in the product and the alkylene oxide to neutralize any further acidity generated by the opening of such groups. The stabilized product formed by this process when incorporated to a polyurethane foam gives a foam having superior green strength to a polyurethane foam which is not treated in accordance with the invention.

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

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