Chemistry of carbon compounds – Dipeptides – e.g. – aspartame – anserine – carnosine – etc.
Patent
1976-03-11
1977-03-15
Raymond, Richard L.
Chemistry of carbon compounds
Dipeptides, e.g., aspartame, anserine, carnosine, etc.
260 25AJ, 260 25AR, 260978, 260983, C07F 908
Patent
active
040124630
ABSTRACT:
The neutralization of products which are phosphorus containing oligomers having ##STR1## linkages between phosphorus atoms and which are obtained by the self-condensation of .beta.-halo-alkyl esters of pentavalent phosphorus acids or by the condensation of these esters with an alkyl ester of a pentavalent phosphorus acid is accomplished by reaction with an alkylene oxide, either alone or in combination with water or an alcohol having the formula ROH where R is a C.sub.1 -C.sub.20 alkyl group, and is enhanced by heating the products with a Lewis acid to promote alcoholysis reactions between labile groups contained therein and structures formed by alkylene oxide neutralization of free acid groups. The stabilized product formed by this process gives a better cure when incorporated in a polyurethane foam.
REFERENCES:
patent: 3641202 (1972-02-01), Biranowski et al.
patent: 3822327 (1974-07-01), Weil
Brokke Mervin E.
Honig Milton L.
Jaffe Fred
Shim Kyung S.
Walsh Edward N.
Fennelly Richard P.
Raymond Richard L.
Stauffer Chemical Company
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