Decolorizing polyaspartic acid polymers

Details Decolorizing polyaspartic acid polymers Decolorizing polyaspartic acid polymers

1993-04-07

1994-03-08

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

525420, 528322, 528328, 528483, C08G 6910

Patent

active

052928640

ABSTRACT:
Solutions of polymers of aspartic acid or its amine copolymers prepared by thermal condensation are reacted with a decolorizing agent selected from the group consisting of hypochlorfte, chlorine, chlorine dioxide, hydrogen peroxide, a peroxycarboxylate or ozone, sufficient in strength to effect the desired decolorization.

REFERENCES:
patent: 4363797 (1982-12-01), Jacquet et al.
patent: 5057597 (1991-10-01), Koskan
patent: 5152902 (1992-10-01), Koskan et al.
Stinson, S. Polyaspartic acid process developed. Chemical and Engineering News, Jul. 20, 1992, p. 21.
Harada, K. and Fox, S. W. Thermal polycondensation of free amino acids with polyphosphoric acid. Chemical Abstracts, vol. 63, 1965 685e.

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