Patent ID: 6566516
Filing Date: 2003-05-20
Classification: C08B

Abstract:
A process for producing a high purity polysaccharide containing a hydrophobic group, comprisinga first process step of producing an isocyanate group-containing hydrophobic compound, wherein one mole of a hydroxyl group-containing hydrocarbon having 12-50 carbon atoms or of a sterol is reacted with a diisocyanate represented by OCNâ€”R1â€”NCO, in which R1 is a hydrocarbyl of 1-50 carbon atoms, a second process step of producing the polysaccharide containing a hydrophobic group composed of the hydrocarbon group of 12-50 carbon atoms or of the steryl group, wherein the isocyanate group-containing hydrophobic compound obtained in the first process step is reacted with one or more polysaccharides, and a third process step of purifying the reaction product in the second process step with a solvent based on a ketone.