POLYSACCHARIDE CHEMICAL MODIFICATION METHOD Russian patent published in 2010 - IPC C08B37/00 C08B15/00 

FIELD: chemistry.

SUBSTANCE: when realising the method, a polysaccharide component is at least once mechanically processed in a roller device, where at least its two neighbouring rollers are rotated in mutually opposite directions at different speeds and before and/or during which the polysaccharide component is mixed with a modifying agent. This method can be used to chemically modify typical representatives of polysaccharides such as pectins, locust bean gum, guar gum and alginates using modifying agents in form of epoxides, alkylhalogenides, chloroacetic acid, chloroacetates, halogen hydrins, mono-and dialkyl sulphates, ammonia, primary and secondary alkyl- and arylamines, acrylic acid and its esters, arylamide, maleynamide acid derivarives, carboxylic acids, acyl chlorides, carboxylic acid anhydrides and mixtures of these compounds. Mechanical processing can be carried out in a multi-roller device, repeating between one and three times if necessary. Each two neighbouring rollers are preferably rotated at speeds which normally differ by 200%. Polysaccharides which are exclusively, uniformly mechanically modified using said method are preferably used as thickeners, gelling agents, emulsifiers, food additives, cosmetic additives and fibre article and hair-care agents.

EFFECT: possibility of uniform and simultaneous reproducible chemical modification of polysaccharides while almost completely avoiding the need to use toxic and environmentally hazardous solvents and auxiliary substances.

14 cl, 1 dwg, 4 ex