Modified cellulose for biocompatible dialysis membranes IV and process for preparation thereof

摘要

A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## 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 CH.sub.3 and/or C. sub.2 H. sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, Z corresponds to the following groups of atoms: SR", SO.sub.3 H and salts thereof, SO-R, SONR".sub.2, SO.sub.2 -R, SO.sub.2 NR".sub.2, SO.sub.2 H and salts thereof, F, Cl, Br, I, NR".sub.2, PR".sub. 2, PO.sub. 3 H.sub.2 and salts thereof, PO.sub.2 H(OR), PO(OR).sub.2, PO. sub.2 HR" and salts thereof, POR"(OR) and POR".sub.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.