Preparation of polyaspartic acid by high temperature reaction

Details Preparation of polyaspartic acid by high temperature reaction Preparation of polyaspartic acid by high temperature reaction

1994-02-22

1994-11-22

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

525418, 525419, 525420, 525539, 528392, C08G 6900

Patent

active

053670477

ABSTRACT:
Polyaspartate, useful for inhibition of incrustations due to materials causing hardness in water and of value in detergent formulations, can be prepared by reacting maleic acid or fumaric acid in a molar ratio of 1:1-2.1 at temperatures greater than 190.degree. C., followed by conversion of the polymer formed in this reaction to a salt of polyaspartic acid by basic hydrolysis.

REFERENCES:
patent: 4839461 (1989-06-01), Boehmke
patent: 5219952 (1993-06-01), Koskan et al.
patent: 5286810 (1994-02-01), Wood
patent: 5296578 (1994-03-01), Koskan et al.

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