Copolymers of polyaspartic acid

Details Copolymers of polyaspartic acid Copolymers of polyaspartic acid

1995-01-17

1995-11-14

Dodson, Shelley A.

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

Synthetic resins

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

525418, 525419, 525420, 525421, 525422, 528328, 528332, 528335, 528345, 528363, C08G 6948

Patent

active

054667607

ABSTRACT:
Higher molecular weight copolymers of polyaspartic acid which are suitable for the inhibition of scale deposition may be obtained by reacting maleic acid and ammonia in a stoichiometric excess, with a diamine or a triamine, at 120.degree.-350.degree. C., preferably 180.degree.-300.degree. C., and then converting the copolymer of polysuccinimide formed to a salt of a copolymer of polyaspartic acid by hydrolysis with a hydroxide.

REFERENCES:
patent: 5292858 (1994-03-01), Wood
patent: 5357004 (1994-10-01), Carlton et al.
patent: 5391642 (1995-02-01), Wood

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