Production of polyaspartic acid from maleic acid and ammonia

Details Production of polyaspartic acid from maleic acid and ammonia Production of polyaspartic acid from maleic acid and ammonia

1994-01-28

1994-12-13

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

525418, 525419, 525420, 528328, C08G 6900

Patent

active

053730887

ABSTRACT:
Polyaspartic acid is produced by thermal condensation of ammonium maleate derived from maleic acid and ammonia. Solid ammonium maleate in particulate form is heated to a temperature of at least about 170.degree. C. to effect thermal condensation to a polysuccinimide which is then base hydrolyzed to a polyaspartic acid salt.

REFERENCES:
patent: 5286810 (1994-02-01), Wood
patent: 5288783 (1994-02-01), Wood
patent: 5292864 (1994-03-01), Wood et al.
patent: 5296578 (1994-03-01), Koskan et al.

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