CATIONIC BIOPOLYMERS

The invention relates to new cationic biopolymers with an average molecular weight of 800,000 to 1,200,000 Dalton, a Brookfield viscosity (1% by weight in glycolic acid) below 5,000 mPas, a degree of deacetylation of 80 to 88% and an ash content of less than 0.3% by weight which are obtained by repe...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	STENBERG, EVEN, SVENNING, RONALD, TESMANN, HOLGER, WACHTER, ROLF, OLSEN, RAGNAR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to new cationic biopolymers with an average molecular weight of 800,000 to 1,200,000 Dalton, a Brookfield viscosity (1% by weight in glycolic acid) below 5,000 mPas, a degree of deacetylation of 80 to 88% and an ash content of less than 0.3% by weight which are obtained by repeatedly subjecting crustacean shells to alternate acidic and alkaline degradation under defined conditions. Compared with known cationic biopolymers of the chitosan type, the new biopolymers form clear solutions and, at the same time, show excellent film-forming properties, despite their high molecular weight.