Process for preparing polysuccinimide by high temperature reacti

Details Process for preparing polysuccinimide by high temperature reacti Process for preparing polysuccinimide by high temperature reacti

Filed on

1994-12-16

Date issued

1997-03-11

Examiner

Mosley, Terressa

Patent Class

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

SubClass

Synthetic resins

SubSubClass

From carboxylic acid or derivative thereof

Other Related Categories

525418, 525419, 525420, 525539, 528392, C08G 6344, C08G 6702

Type

Patent

Status

active

Patent number

056102674

Description

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 malic acid, maleic acid or fumaric acid with ammonia, in a molar ratio of 1:1-2.1 at temperatures greater than 140.degree. C., followed by conversion of the polysuccinimide formed in this reaction to a salt of polyaspartic acid by basic hydrolysis.

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Patent Abstracts of Japan, vol. 010, No. 056 (C-331) 6 Mar. 1986 & JP-A-60 197 646 (Nippon Shokubai Kagaku Kogyo KK) 7 Oct. 1985 *abstract*.

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