Method of producing swellable, non-aging starch maleates, biolog

Details Method of producing swellable, non-aging starch maleates, biolog Method of producing swellable, non-aging starch maleates, biolog

1998-01-26

2000-05-16

Wilson, James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536110, 536123, 536 45, 536 48, 536 49, C08B 3104

Patent

active

060639148

ABSTRACT:
The aging of swellable starch maleates is reduced by reacting with one or more singly and/or multiply functional nucleophiles as in a Michael condensation reaction. Mixtures of mercaptoethanol and 1,2-bis-(2-mercaptoethoxy)-ethane or mixtures of sodium bisulfite and pentaerythrite-tetrakis-(2-mercaptoacetate) are preferred. The decrease of the retention capacity [SRV] in the reaction products after 100 days is preferably <10%. The products find use as biodegradable, non-aging superabsorbers.

REFERENCES:
patent: 5789570 (1998-08-01), Buccholz et al.

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