Gelating agent for alkaline cell and alkaline cell

A gelling agent, alkaline battery technology, applied in the direction of alkaline battery electrodes, electrolyte immobilization/gelation, battery electrodes, etc., can solve problems such as insufficient satisfaction

Inactive Publication Date: 2005-05-18
SANYO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these gelling agents are not yet sufficiently satisfactory in terms of preventing zinc powder sedimentation, battery leakage, liquid squeezing of the gelling agent, and battery production efficiency.

Method used

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  • Gelating agent for alkaline cell and alkaline cell
  • Gelating agent for alkaline cell and alkaline cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0172] In a 2-liter beaker, 200 g of acrylic acid, 0.6 g of (0.3% / acrylic acid pentaerythritol triallyl ether (manufactured by Daiso), and 800 g of ion-exchanged water were added, and cooled to 8°C.

[0173] Put the acrylic acid aqueous solution into a 1.5-liter heat-insulated polymerization tank, pass nitrogen into the aqueous solution, make the dissolved oxygen in the aqueous solution reach below 0.1PPm, add 4.0g0.1% hydrogen peroxide and 4.0g0.1%L -Aqueous solution of ascorbic acid and 10% aqueous solution of 1.0 g of 2,2'-azobis(2-amidinopropane)hydrochloride (manufactured by Wako Pure Chemical Industry Co., Ltd., trade name: V-50), continue to purify the nitrogen in the aqueous solution until until aggregation begins. The polymerization started, and since the viscosity of the acrylic acid aqueous solution started to rise, the nitrogen purge was stopped, and the polymerization was carried out for 6 hours. The temperature of the aqueous acrylic acid solution was measured w...

Embodiment 2

[0181] According to Example 1, except that the amount of pentaerythritol triallyl ether added was 0.2 g (0.1% / acrylic acid), other operations were carried out in the same manner as in Example 1 to obtain the gelling agent (2) of the present invention.

Embodiment 3

[0183] To 100 g of the powder of the gelling agent (2) of the present invention obtained in Example 2, 0.1 g of ethylene glycol diglycidyl ether (manufactured by Nagase Chemicals Co., Ltd., trade name: Dynakolu) was added. (デナコ—ル) 810) and 7.9g of methanol and 2.0g of ion-exchanged water to form a mixed solution, fully mixed, the mixed powder into the circulating air drying mechanism at 130 ° C, heated for 30 minutes, and gelatinizer The surface is cross-linked to obtain the gelling agent (3) of the present invention.

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Abstract

The present invention is formed by utilizing the cross-linked polymer of acrylic acid and / or methacrylic acid and / or alkali metal salts obtained by aqueous solution polymerization method or reverse phase suspension polymer as the main constituent unit, and has the following (1 ), (2) The gelling agent for alkaline batteries and the batteries using it, the discharge continuity and impact resistance of alkaline batteries are excellent, the rolling liquid of alkaline electrolyte is good, corresponding to The high-speed filling of the liquid and the small deviation of the electrolyte filling amount can effectively mass-produce batteries with uniform quality. (1) In the concentration of 40% by weight potassium hydroxide aqueous solution, the swellable gelled particles with a particle diameter of 300 to 4000 μm contain 50% or more; The stringiness of the aqueous solution is 0-20mm.

Description

technical field [0001] The present invention relates to a gelling agent for alkaline batteries and alkaline batteries. In more detail, it relates to a gelling agent for a negative electrode alkaline battery in a gel form using a gelling agent for an alkaline battery negative electrode mainly including an alkaline electrolyte solution and zinc powder, and an alkaline battery using the gelling agent. technical background [0002] For many years, the cathode of alkaline batteries has mainly used a mixture of high-concentration alkaline electrolyte (high-concentration potassium hydroxide aqueous solution, containing zinc oxide, etc.) and zinc powder and / or zinc alloy powder, in order to prevent alkaline Zinc powder and the like in the electrolytic solution settle, and it is proposed to use a water-absorbing resin or the like having large particles in which poly(meth)acrylic acid and its salts are insolubilized by a crosslinking agent as a gelling agent. (1. Japanese Patent Publ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/06C09K3/00H01M4/02H01M4/24H01M4/62H01M6/06H01M6/08H01M6/22
CPCH01M4/02H01M4/621H01M4/622H01M6/06H01M6/08H01M6/22H01M2300/0014H01M2300/0085
Inventor 住谷隆小池正美钱谷幸雄
Owner SANYO CHEM IND LTD
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