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Abstract

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.

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First Claim