METHOD FOR PRODUCING CARBOXYMETHYL CELLULOSE OR ITS SALT AND BINDER FOR ELECTRODE

Japanese Patent JP2017149901

A

PROBLEM TO BE SOLVED: To provide carboxymethyl cellulose or its salt which suppresses a defect on an electrode surface such as a pin hole when used as a binder for an electrode of a nonaqueous electrolyte secondary battery and has excellent capacity retention of a battery using the same.SOLUTION: There is provided a method for producing carboxymethyl cellulose or its salt which comprises: an alkali cellulose-forming step (step 1) of reacting cellulose with an alkali in the presence of a mixed solvent containing water and an organic solvent; an etherification step (step 2) of reacting the resulting alkali cellulose with an etherifying agent; a purification step (step 3) of washing and drying the resulting reaction mixture; and a pulverizing step (step 4) of pulverizing the resulting purified material, wherein the step 1 is carried out for a reaction time of 60 minutes or more and 120 minutes or less under conditions of a pH of 9 or more and a reaction temperature of 5°C or more and 25°C or less.SELECTED DRAWING: None

KAKUBARI RYO
SANUKI ATSUSHI

JP2016035815A

August 31, 2017

February 26, 2016

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DAI ICHI KOGYO SEIYAKU CO LTD

C08B11/12; C08B1/08; H01M4/62

JP2002536507A	2002-10-29
JPS6296501A	1987-05-06
JPS62246901A	1987-10-28
JP2013114959A	2013-06-10
JP2005108833A	2005-04-21

WO2010061871A1

2010-06-03

Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita
Ariyoshi Yasuomi
Ryu Maesawa
Tamako Tsutada

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