Preparation of salt of polyaspartic acid by high temperature rea

Details Preparation of salt of polyaspartic acid by high temperature rea Preparation of salt of polyaspartic acid by high temperature rea

1993-01-21

1994-02-22

Anderson, Harold D.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525419, 525420, 525539, 528363, 528392, C08G 6900

Patent

active

052887839

ABSTRACT:
Polyaspartate, useful or 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 170.degree. C., followed by conversion of the polymer formed in this reaction to a salt of polyaspartic acid by basic hydrolysis.

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patent: 5077597 (1991-10-01), Koskan
patent: 5152902 (1992-10-01), Koskan et al.
Dessaignes, Quartley Journal of The Chemical Society of London, vol. 3, reprinted Jun. 1950, Translation of Comp. Rendu XXX, 324.
Frankel et al. J. Org. Chem., 16, 1513, Jun. 1951, Synthesis of polyaspartic acid.
Kovacs et al. J. Org. Chem. 25, 1084, Jun. 1961, Chemical Studies of polyaspartic acids.
Harada et al. Origins Prebiol. systems Their Mol. Matrices, Proc. Conf Wakulla Springs, Fla., 289, Jun. 1963, Abstract.
Sarig et al., The use of polymers for retardation of scale formation, Natl. Counc. Res. Dev. (Rep.) (Isr.), 150, Jun. 1977.

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