Aspartic acid copolymers and their preparation

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528328, 528332, 528335, 528345, 525418, 525419, 525420, C08G 6948

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active

RE0362344

ABSTRACT:
Aspartic acid precursors such as mono and diammonium maleate, maleamic acid, ammonium maleamate, ammonium malate and mixtures of these and other precursors are copolycondensed thermally with a variety of mono, di and multifunctional monomers containing amino, hydroxyl and carboxyl functional groups. The resulting condensation copolymers and terpolymers contain succinimide units derived from aspartic acid precursors, condensed amide and ester linkages. Hydrolysis of the polysuccinimide copolymers and terpolymers with alkali, alkaline earth and ammonium hydroxide produces aspartic acid copolymer and terpolymer salts.

REFERENCES:
patent: 2306918 (1942-12-01), Weiss et al.
patent: 3846380 (1974-11-01), Fujimoto et al.
patent: 5292858 (1994-03-01), Wood
patent: 5357004 (1994-10-01), Calton et al.
patent: 5408028 (1995-04-01), Wood et al.

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