WATER-SOLUBLE CARBOXYMETHYLAZOMETHYNE DERIVATIVES OF CELLULOSE AND METHOD OF PREPARATION THEREOF Russian patent published in 2001 - IPC

FIELD: paper-and-pulp industry. SUBSTANCE: watersoluble biologically-active carboxymethylazomethyne derivatives of cellulose with general formula of repeating unit: C₆H_8-xO_5-4-(NR)_y(CH₂COOH)_x, wherein x>0.13, y>0, x+y<3, are prepared by interaction of hydroxycellulose (oxidized group level no higher than 29%) with water- or organic solvent-soluble amino compound with general formula NH₂-R, wherein R residue is selected from 5- amino-1,2,4-triazole, alpha-aminopyridine, aminobenzene, and alphaaminosuccinic acid, to produce azomethyne derivatives, which are then subjected to carboxymethylation. EFFECT: achieved production of biologically-active cellulose derivatives with degree of substitution 5-6 for azomethynes and near 14 for carboxymethyls. 21 cl, 1 tbl, 6 ex