Novel starch ether derivatives, a method for the preparation the

Details Novel starch ether derivatives, a method for the preparation the Novel starch ether derivatives, a method for the preparation the

1980-01-10

1981-04-07

Schofer, Joseph L.

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

Organic compounds

Carbohydrates or derivatives

106210, 162175, 536 34, 536 50, 536106, 536109, 536110, 536111, C08B 3108, C08B 3110, C08B 3114, D21H 328

Patent

active

042607388

ABSTRACT:
Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes.

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patent: 4166173 (1979-08-01), Wurzburg et al.
patent: 4167621 (1979-09-01), Tessler

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