Phosphonomethylated chitosans

Details Phosphonomethylated chitosans Phosphonomethylated chitosans

1995-11-21

1998-07-07

Fonda, Kathleen K.

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

Organic compounds

Carbohydrates or derivatives

536124, 2521861, 2521881, C08B 3708, C11D 3395

Patent

active

057770913

ABSTRACT:
Phosophonomethylated chitosans containing repeating units of formula ##STR1## wherein R.sub.1 is hydrogen or a radical of formula ##STR2## R.sub.2 is a radical of formula (1a), X.sub.1 and X.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.5 alkyl or an alkali metal ion or ammonium ion and n is 50 to 4000, have versatile utilities as sequestrants, stabilizers for bleaching agents as well as humectants in cosmetic compositions.

REFERENCES:
patent: 3288846 (1966-11-01), Irani et al.
patent: 3879376 (1975-04-01), Vanlerberghe
patent: 5646271 (1997-07-01), Stehlin et al.
Redmore, J. Org. Chem. vol. 43, No. 5 (1978), 992-7.

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