Indican and suspensions and gels thereof and their uses

Details Indican and suspensions and gels thereof and their uses Indican and suspensions and gels thereof and their uses

1980-02-29

1982-07-06

Bernstein, Hiram

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

Organic compounds

Carbohydrates or derivatives

435101, C12P 1904

Patent

active

043384323

ABSTRACT:
Indican, a polysaccharide comprising (1.fwdarw.3) glucose, (1.fwdarw.4) mannose, (1.fwdarw.4) rhamnose and (1.fwdarw.3 or 4) -0-(1-carboxyethyl)-rhamnose units in a molar ratio of about 2:1:1-2:1 respectively; containing 12-15% by weight acetyl units; [.alpha.]D.sup.20 about -61.degree.; having principle absorption bands in the infra red band at 3390, 1735, 1615, 1375, 1250 and 1050 cm.sup.-1 ; a solubility of at least 1% by weight in methanol and in ethylene glycol, and an inherent viscosity of about 33.5 dl/g. has useful thixotropic properties and provides a method of modifying the viscosity of a liquid by incorporating indican therein. The liquid may be aqueous or organic solvent-based. Thickened and stabilized products and a method of preparing indican by culture of an indican-producing microorganism are also provided.

REFERENCES:
Chem. Abs., v. 86, 1977, 86:41229.

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