Polysaccharide and a method of producing it
US5378832A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 20, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Jul 20, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/829
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention provides a polymer comprising a polysaccharide having excellent water absorption properties, moisture absorption properties, moisture retention properties and thickening properties. Said polysaccharide has the following properties: (A) the principal constituents of the sugar composition are rhamnose, fucose, glucose and glucuronic acid which are present in a molar ratio of (1-4):2:(1-8):(1-4); (B) elemental analysis (wt %): PA2 C: 36 .+-.3 PA2 H: 7 .+-.1 PA2 O: 56 .+-.4, PA2 containing 9-13% of crystalline water PA1 (C) solubility: PA2 slightly soluble in water; soluble in alkalies; insoluble in methanol, ethanol and acetone; PA1 (D) UV absorption spectrum: PA1 no absorption detected at 280 nm characteristic of proteins (peptides) or at 260 nm characteristic of nucleic acids; and PA1 (E) IR absorption spectrum: PA2 an absorption pattern characteristic of polysaccharides is observed near 800-1200.sup.-i Said polysaccharide is produced by a fermentation method using a natural medium or a synthetic medium of Alcaligenes microorganism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.