| abstract |
A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula <IMAGE> wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH3 and/or C2H5 and/or C3H7, X denotes specified functional groups, R'' is H or R, Z corresponds to the following groups of atoms: SR'', SO3H and salts thereof, SO-R, SONR''2, SO2-R, SO2NR''2, SO2H and salts thereof, F, Cl, Br, I, NR''2, PR''2, PO3H2 and salts thereof, PO2H(OR), PO(OR)2, PO2HR'' and salts thereof, POR''(OR) and POR''2, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and z=0.01 to 0.45. A process for preparation of the cellulose derivatives is also disclosed. |