Production process of film and column for cation chromatography

Patent metadata

Field	Value
Publication number	US-9579629-B2
Application number	US-201414299589-A
Country	US
Kind code	B2
Filing date	Jun 9, 2014
Priority date	Sep 11, 2002
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

One object of the present invention is to produce a weakly acidic cation exchanger under mild conditions. Another object of the present invention is to produce a more firm weakly acidic cation exchange film. Still another object of the present invention is to provide a weakly acidic cation exchanger capable of realizing high-level separation of monovalent cation and simultaneously analyzing monovalent cation and divalent cation and also provide a chromatography column using the ion exchanger. In the production method of a weakly acidic cation exchanger of the invention, a solvent incapable of dissolving a polymer having a double bond within the molecule is used and the weakly acidic cation exchanger is produced by polymerization at temperature of 100° C. or less.

First claim

What is claimed is:

1. A film production process comprising the following steps (1) and (2):
Step (1):
a step of coating a polymer having a double bond within the molecule on an organic porous support,
wherein:
the polymer having a double bond within the molecule is an unsaturated carboxylic acid-diene monomer copolymer and/or an unsaturated carboxylic anhydride-diene monomer copolymer,
and
the organic porous support is selected from the group consisting of polystyrene gel, poly(meth)acrylate gel and polyvinyl alcohol gel,

Step (2):
a step of placing the support coated with the polymer in a solvent incapable of dissolving the polymer coated, to cause a crosslinking reaction of the double bond within the molecule in the presence of radical polymerization initiators and thereby form a film.

2. The film production process as claimed in claim 1 , wherein the organic porous support is a polyvinyl alcohol gel.

3. The film production process as claimed in claim 1 , wherein the coating method is dispersing the support in a solvent having dissolved therein the polymer having the double bond and then drying or removing the solvent.

4. The film production process as claimed in claim 1 , wherein:
the organic porous support is a plate, and
the coating method is dipping the support in a solvent having dissolved therein the polymer having the double bond and then drying the solvent.

5. The film production process as claimed in claim 1 , wherein:
the organic porous support is a porous spherical fine particle, and
the coating method is dispersing the support in a solvent having dissolved therein the polymer having the double bond and then removing the solvent.

6. The film production process as claimed in claim 2 , wherein:
the organic porous support is a porous spherical fine particle, and
the coating method is dispersing the support in a solvent having dissolved therein the polymer having the double bond and then removing the solvent.

Assignees

• Showa Denko Kk

Inventors

• Okada Yoshiji

Classifications

• B01J47/016

  Modification or after-treatment of ion-exchangers · CPC title

• B01J39/07

  in the weakly acidic form · CPC title

• G01N30/482

  Physics · mapped topic

• B01J47/006

  Operations & Transport · mapped topic

• Y10T428/31504

  Composite [nonstructural laminate] · CPC title