Title:
METHOD FOR RECOVERING SULFONIC GROUP-CONTAINING POLYMER
Document Type and Number:
Japanese Patent JP3758588
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a method for recovering a sulfonic group-containing polymer which can be used in electrolytes for primary cells, electrolytes for secondary cells, polymeric solid electrolytes for fuel cells, display elements, various sensors, signal transmission media, solid capacitors, ion-exchange membranes and the like.
SOLUTION: The method for recovering a sulfonic acid group-containing polymer comprises (1) a step of carrying out the sulfonation of a polymer in sulfuric acid having a concentration of 95.5-99.5 at a weight ratio of the polymer to the sulfuric acid of 1/5 to 1/60 and (2) a step of rendering the ratio (weight ratio) of the sulfuric acid to the water in the reaction solution after sulfonation 94/6 to 85/15 and subsequently coagulating the sulfonated polymer.
Inventors:
Koichi Onoe
Application Number:
JP2002061035A
Publication Date:
March 22, 2006
Filing Date:
March 06, 2002
Export Citation:
Assignee:
JSR CORPORATION
International Classes:
C08G65/48; C08G85/00; (IPC1-7): C08G85/00; C08G65/48
Domestic Patent References:
| JP6093114A | ||||
| JP2016126A | ||||
| JP57025328A | ||||
| JP2017571B2 |
Previous Patent: DISK REPRODUCING DEVICE AND RANDOM MUSIC SELECTION METHOD FOR DISK REPRODUCING DEVICE
Next Patent: ROTOR STRUCTURE
Next Patent: ROTOR STRUCTURE