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Title:
BINDING AGENT FOR POSITIVE ELECTRODE OF ALKALINE BATTERY AND ALKALINE BATTERY
Document Type and Number:
Japanese Patent JP2011258545
Kind Code:
A
Abstract:

To provide a binding agent for a positive electrode of an alkaline battery and an alkaline battery using the same, which are excellent in maintaining discharge characteristics (a discharge amount and a discharge time) over a long term.

A binding agent (E) for a positive electrode of an alkaline battery includes: a cross-linked polymer (B) in which a water soluble vinyl monomer (a1) and/or a vinyl monomer (a2) and a hydrolytic cross-linking agent (b) are essential constituent monomers; and a cross-linked polymer (C) in which (a1) and/or (a2) and non-hydrolytic cross-linking agent (c) are essential constituent monomers. A weight ratio of (B) to (C) is 0.1-100. The binding agent satisfies the following requirement (1) and requirement (2): requirement (1) is that an absorption ratio of 40 wt.% potassium hydroxide aqueous solution by (E) is 5-80 g/g; and requirement (2) is that a mixture of 98 pts.wt. of 40 wt.% potassium hydroxide aqueous solution and 2 pts.wt. of (E) is agitated to be prepared and is left standing at 25°C for 24 hours, and viscosity (25°C) of the resulting compound (D) is 1-100 Pa s.


Inventors:
MATSUMOTO YOSHIMASA
KOBAYASHI YUKA
Application Number:
JP2011000104340
Publication Date:
December 22, 2011
Filing Date:
May 09, 2011
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD
International Classes:
H01M4/62; H01M6/08
Domestic Patent References:
JP2004071446A2004-03-04
JP2006108078A2006-04-20



 
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