Polymeric membrane having maleic anhydride residues

• US 4,407,975 A
• Filed: 02/26/1982
• Issued: 10/04/1983
• Est. Priority Date: 05/22/1981
• Status: Expired due to Fees

• Current Assignee: Agency of Industrial Science & Technology
• Original Assignee: Agency for Industrial Science and Technology
• Inventors: Yamaguchi, Tomohiko
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Kulkosky, Peter F.
• Application Number:
  US06/352,863
• Time in Patent Office: 585 Days
• Field of Search: 521/27, 521/28, 525/225
• US Class Current: 521/27
• CPC Class Codes: B01D 71/40 Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
• CPC Class Codes: B01D 71/403 Polymers based on the polymerisation of maleic acid or derivatives thereof
• CPC Class Codes: C08J 2333/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08J 3/24 Crosslinking, e.g. vulcanising, of macromolecules mechanical aspects B29C35/00; crosslinking agents C08K
• CPC Class Codes: C08J 5/2231 based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds
• CPC Class Codes: C12N 11/087 Acrylic polymers

Abstract

A polymeric membrane having maleic anhydride residues which comprises a blend of a maleic anhydride copolymer and a support polymer, said blend being partially cross-linked with a bifunctional cross-linking reagent. When hydrolyzed, this membrane turns into an ion exchange membrane or a membrane on which an enzyme is immobilized.

Claims

1. A polymeric membrane having maleic anhydride residues which comprise a blend of (1) a copolymer of maleic anhydride and an olefin or vinyl monomer and (2) a polyalkyl methacrylate, said blend being partially cross-linked with a bifunctional cross-linking reagent and being prepared by dissolving and mixing said copolymer and polyalkyl methacrylate in an organic solvent together with said bifunctional cross-linking reagent and thereafter removing the organic solvent.

2. A polymeric membrane as claimed in claim 1, wherein the bifunctional cross-linking reagent is a diamine or diol.

3. A polymeric membrane as claimed in claim 1, wherein the maleic anhydride copolymer and the support polymer are blended at a ratio of 10-30 :

70-90 (by weight).

4. A polymeric membrane as claimed in claim 1, wherein the quantity of the bifunctional cross-linking reagent is from 1/20 to 1/5 equivalent of maleic anhydride residues.

5. A polymeric membrane as claimed in any one of claims 1 to 4, wherein the maleic anhydride residues are connected to amino groups.

6. A polymeric membrane as claimed in any one of claims 1 to 4, wherein the maleic anhydride residues are connected to an enzyme.

7. A polymeric membrane as claimed in any one of claims 1 to 4, wherein the maleic anhydride residues are connected to an enzyme immobilizing compound selected from the group consisting of acid azide, imide ester, aldehyde, acid chloride, isocyanate, and isothiocyanate.

8. A polymeric membrane as claimed in claim 7, wherein the enzyme immobilizing compound is further connected to an enzyme.