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Production method of special polyvinyl chloride resin for battery separator with medium and high degree of polymerization

A technology of polyvinyl chloride resin and battery separator, which is applied in the field of special materials for battery separators, can solve the problems of low yield, low strength, and low quality of separators, and achieves reasonable production technology and formula, and uniform particles. , the effect of particle size distribution concentration

Active Publication Date: 2011-12-28
天津渤化化工发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyvinyl chloride resin widely used at present, due to the relatively backward technology and formula, the resin used for the partition has low strength and low material yield, and at the same time, there are individual large particles in the resin, which affect the uniformity of the gap of the partition. Reduce the quality of the partition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 7.5m to the polymerization kettle 3 desalinated water, 4.5m 3 Vinyl chloride monomer, 10kg of methyl cellulose, 1.8kg of ammonium bicarbonate, 3.5L of neodecanoic acid-2,4,4-trimethylpentyl peroxide were added to the polymerization kettle, stirring at 210rpm, 45°C Polymerization reaction was carried out at 1 hour and 20 minutes, and the stirring speed was transferred to 165rpm to continue the reaction to 10.5 hours, and 0.002kg of acetone thiocarbamate and 0.003m 3 Organosiloxane emulsion. The polyvinyl chloride suspension slurry can be obtained. After the slurry is air-lifted, centrifuged, air-dried, cyclone-dried and bag-dust removed, the finished polyvinyl chloride resin product specially used for battery separators with medium and high polymerization degrees can be obtained. The finished product is tested by adopting the national standard, and the results are shown in Table 1.

Embodiment 2

[0034] Add 7.5m to the polymerization kettle 3 desalinated water, 4.5m 3 Vinyl chloride monomer, 5kg of carboxymethyl cellulose, 5kg of methyl cellulose, 4.5L of ammonium carbonate solution, and 3.0L of diisobutyl peroxide were added to the polymerization kettle, and the polymerization was carried out at a stirring speed of 210rpm and 46°C. Reaction, when reacting for 1 hour and 10 minutes, the stirring speed was adjusted to 155rpm and continued to react for 9.5 hours, adding 0.002kg acetone thiocarbamate and 0.003m 3 Organosiloxane emulsion. The polyvinyl chloride suspension slurry can be obtained. After the slurry is air-lifted, centrifuged, air-dried, cyclone-dried and bag-dust removed, the finished polyvinyl chloride resin product specially used for battery separators with medium and high polymerization degrees can be obtained. The finished product is tested by adopting the national standard, and the results are shown in Table 1.

Embodiment 3

[0036] Add 7.5m to the polymerization kettle 3 desalinated water, 4.5m 3 Vinyl chloride monomer, 5kg of methylcellulose and 5kg of ethylcellulose, 5kg of sodium carbonate, 1.5L of neodecanoic acid-2,4,4-trimethylpentyl peroxide and 2.2L of diisoperoxide Add butyl fat into the polymerization kettle, and carry out the polymerization reaction at 230rpm stirring speed and 48°C. After 1 hour and 15 hours of reaction, adjust the stirring speed to 115rpm and continue the reaction for 8.0 hours, add 0.002kg acetone thiocarbamate and 0.003m 3 Organosiloxane emulsion. The polyvinyl chloride suspension slurry can be obtained. After the slurry is air-lifted, centrifuged, air-dried, cyclone-dried and bag-dust removed, the finished polyvinyl chloride resin product specially used for battery separators with medium and high polymerization degrees can be obtained. The finished product is tested and its results are shown in Table 1.

[0037] Table 1:

[0038] Example

[0039] The ...

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PUM

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Abstract

The invention relates to a method for producing a polyvinyl chloride resin special for battery separators with medium-high polymerization degree. The method comprises the following steps of: adding demineralized water, vinyl chloride, a dispersing agent, an initiating agent, a pH regulator and an assistant into a sealed polymerizing pot to perform polymerization reaction at the temperature of between 38 and 44 DEG C at a stirring speed of between 60 and 240rpm; adjusting the stirring speed to be 0.56 to 0.8 time the original stirring speed when the polymerization conversion rate is between 8 and 20 percent, and adding a termination agent to stop the polymerization reaction when the polymerization pressure is reduced by 0.31 to 0.35MPa, wherein the reaction time is between 7 and 11 hours; and performing gas stripping, centrifugation, steam flow drying and cyclone drying on the slurry, and allowing the slurry to pass through a bag-type dust collector to obtain a finished product, namely the polyvinyl chloride resin special for the battery separators with the medium-high polymerization degree. The resin has relatively high polymerization degree, moderate resin structure porosity, less than 40 mu m of the mean grain size of resin grains, concentrated size distribution, uniform and regular grains, 18 to 30g / 100g of absorptivity, and 0.38 to 0.50g / ml of apparent density.

Description

technical field [0001] The invention relates to a special material for storage battery separators, in particular to a storage battery separator made of polyvinyl chloride. Background technique [0002] The storage battery is a chemical power source widely used in various sectors of the national economy. The separator is an important component of the storage battery, and its quality has a great impact on the starting performance, capacity, life, and self-discharge performance of the storage battery. With the continuous improvement of batteries, the separators are also constantly being remodeled. The materials of battery separators are gradually developed from wood, paper, rubber, and sintered polyvinyl chloride separators, and their performance is gradually improved. In order to meet the needs of my country's battery industry, it is necessary to develop high-quality special materials for battery separators. Use our company's PVC material test production base to develop and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/20H01M2/16H01M50/414
CPCY02E60/10
Inventor 崔玉霞田爱娟王志东赵金喜
Owner 天津渤化化工发展有限公司