Preparation of polycationic polysaccharides by site selective re

Details Preparation of polycationic polysaccharides by site selective re Preparation of polycationic polysaccharides by site selective re

1989-10-31

1991-02-12

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536 187, 536120, C08B 3700

Patent

active

049925369

ABSTRACT:
Polycationic polysaccharide derivatives containing more than one cationic substituent per substituted hydroxyl group are prepared by a site selective reaction of a cationic polysaccharide derivative with a suitable cationic reagent at a pH from 7.0 to 9.0. Suitable reagents include cationic alkyl, aryl, alkaryl, cycloaliphatic, or heterocyclic amines, and polymer thereof, which selectively react with a cationic substituent rather than a hydroxyl group of the cationic polysaccharide derivative. The polycationic polysaccharide derivatives prepared from these reagents are useful in the manufacture of paper.

REFERENCES:
patent: 3930877 (1976-01-01), Aitken
patent: 4129722 (1978-12-01), Iovine et al.
patent: 4281109 (1981-07-01), Jarowenko et al.
patent: 4452978 (1984-06-01), Eastman
patent: 4785087 (1988-11-01), Stober et al.

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