Dialysis membrane composed of polysaccharide ether II
First Claim
1. A dialysis membrane for hemodialysis comprising a sheet film, tubular film, or hollow fiber composed of polysaccharide ether, the polysaccharide ether having a structure given by the formula ##STR7## in which cell is the skeleton of an unmodified cellulose molecule or of a chitin molecule, each with no hydroxyl groups, s is equal to 3 when the cell is the skeleton of an unmodified cellulose molecule and 2 when the cell is the skeleton of a chitin molecule, x is the degree of etherification in the range of from 0.001 to 0.079, and R is at least one substituted or unsubstituted group selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, arylalkynyl group with 3 to 25 carbon atoms, and a radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.
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Accused Products
Abstract
A dialysis membrane for hemodialysis in the form of sheet films, tubular films, or hollow fibers is composed of a polysaccharide ether. The polysaccharide ether has a structure given by the formula ##STR1## in which cell is the skeleton of the unmodified cellulose molecule or of the chitin molecule, each with no hydroxyl groups, s is equal to 3 for the unmodified cellulose molecule and 2 for the chitin molecule, and x is the degree of etherification, which is in the range from 0.001 to 0.079, and R is an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, and/or arylalkynyl group with 3 to 25 carbon atoms, and/or the radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.
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Citations
28 Claims
- 1. A dialysis membrane for hemodialysis comprising a sheet film, tubular film, or hollow fiber composed of polysaccharide ether, the polysaccharide ether having a structure given by the formula ##STR7## in which cell is the skeleton of an unmodified cellulose molecule or of a chitin molecule, each with no hydroxyl groups, s is equal to 3 when the cell is the skeleton of an unmodified cellulose molecule and 2 when the cell is the skeleton of a chitin molecule, x is the degree of etherification in the range of from 0.001 to 0.079, and R is at least one substituted or unsubstituted group selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, arylalkynyl group with 3 to 25 carbon atoms, and a radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.
- 16. A dialysis membrane for hemodialysis comprising a sheet film, tubular film, or hollow fiber composed of polysaccharide ether, the polysaccharide ether having a structure given by the formula ##STR8## in which cell is the skeleton of an unmodified cellulose molecule or of a chitin molecule, each with no hydroxyl groups, s is equal to 3 when the cell is the skeleton of an unmodified cellulose molecule and 2 when the cell is the skeleton of a chitin molecule, x is the degree of etherification in the range of from 0.001 to 0.019, and R is at least one substituted or unsubstituted group selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, arylalkynyl group with 3 to 25 carbon atoms, and a radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.
- 22. A dialysis membrane for hemodialysis comprising a sheet film, tubular film, or hollow fiber composed of polysaccharide ether having a degree of polymerization (DP) of from 200 to 5000, the polysaccharide ether having a structure given by the formula ##STR9## in which cell is the skeleton of an unmodified cellulose molecule or of a chitin molecule, each with no hydroxyl groups, s is equal to 3 when the cell is the skeleton of an unmodified cellulose molecule and 2 when the cell is the skeleton of a chitin molecule, x is the degree of etherification in the range of from 0.001 to 0.079, and R is at least one substituted or unsubstituted group selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, arylalkynyl group with 3 to 25 carbon atoms, and a radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.
Specification