Production method for polyvinyl chloride powder for preparing baffle plate of lead acid storage battery

A technology of polyvinyl chloride powder and lead-acid battery, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of insufficient strength of the separator, poor microporous structure, damage to equipment, etc., and achieve good microporous structure. , Optimize the polymerization process, the effect of high thermal stability

Inactive Publication Date: 2010-10-06
武汉祥龙电业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the general suspension method and emulsion method polyvinyl chloride resin can be used to prepare sintered separators, due to the large particles of the suspension method polyvinyl chloride resin, there will be a large number of through holes and cracks in the product, and the strength of the separator is not enough; Although the particle size of the general-purpose emulsion method resin is small, because it is used for paste, in order to obtain good paste performance, the particle size distribution must be enlarged, resulting in poor microporous structure after sintering, low porosity, high resistance, and residues on the surface of the resin. The emulsifier is an excellent foaming agent, resulting in a large amount of acid foam when the battery is first charged, which will damage the equipment and pollute the environment

Method used

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  • Production method for polyvinyl chloride powder for preparing baffle plate of lead acid storage battery
  • Production method for polyvinyl chloride powder for preparing baffle plate of lead acid storage battery
  • Production method for polyvinyl chloride powder for preparing baffle plate of lead acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 260kg of desalted water into the polymerization kettle, start stirring, mix 160kg of vinyl chloride, 1kg of sodium lauryl sulfate, 1.5kg of sodium stearate, initial amount of 0.016kg of potassium persulfate, 0.32kg of sodium bisulfite, 0.003kg of Put copper chloride and 0.06kg sodium hydroxide into the kettle, stir at a speed of 40 rpm, polymerize at 50°C, add the remaining amount of potassium persulfate aqueous solution continuously according to the reaction rate, polymerize for 10-12 hours, when the pressure in the kettle drops When the temperature reaches 0.4 MPa, add 0.4 kg of sodium stearate, stir for 10 minutes, start to recover unreacted vinyl chloride in the kettle, and spray-dry the obtained latex to obtain a finished powdery vinyl chloride polymer. The finished product meets the requirements of the Q / GH.JS0218-91 standard. The test results are shown in Table 2.

Embodiment 2

[0032] Add 260kg of desalted water into the polymerization kettle, start stirring, and mix 160kg of vinyl chloride, 0.8kg of sodium laurate, 0.4kg of myristic acid, 1.2kg of sodium stearate, initial quantities of 0.016kg of potassium persulfate, and 0.32kg of sodium bisulfite , 0.003kg of copper chloride, 0.06kg of sodium hydroxide are put into the kettle, the stirring speed is 40 rev / min, polymerized at 50°C, and the remaining amount of potassium persulfate aqueous solution is continuously added according to the reaction rate, polymerized for 10-12 hours, when the kettle When the internal pressure drops to 0.4 MPa, add 0.4 kg of sodium laurate, stir for 10 minutes, start to recover unreacted vinyl chloride in the kettle, and spray-dry the obtained latex to obtain a finished powdery vinyl chloride polymer. The resulting finished product meets the requirements of the Q / GH.JS0218-91 standard, and the test results are shown in Table 2.

Embodiment 3

[0034] Add 260kg of desalted water in the polymerization kettle, start stirring and mix 160kg vinyl chloride, 0.8kg sodium dodecylbenzenesulfonate, 1.6kg sodium stearate, initial amount 0.016kg Potassium persulfate, 0.32kg of sodium bisulfite, 0.003kg of copper chloride, and 0.06kg of sodium hydroxide were put into the kettle. The stirring speed is 40 revolutions / min, polymerize at 50°C, continuously add the remaining amount of potassium persulfate aqueous solution according to the reaction rate, polymerize for 10-12 hours, when the pressure in the kettle drops to 0.4MPa, add 0.4kg of sodium stearate, After stirring for 10 minutes, unreacted vinyl chloride was recovered in the kettle, and the obtained latex was spray-dried to obtain a finished powdery vinyl chloride polymer. The resulting finished product meets the requirements of the Q / GH.JS0218-91 standard, and the test results are shown in Table 2.

[0035] Table 2 The performance test results of vinyl chloride powder poly...

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Abstract

The invention discloses a production method for polyvinyl chloride powder for preparing a baffle plate of a lead acid storage battery, and belongs to the field of the emulsion polymerization method of a vinyl chloride monomer. The method comprises the following steps of: adding the component materials such as the vinyl chloride monomer, an initiator, an emulsifier, a pH regulator, desalted water and the like into a polymerization kettle in proportion and performing polymerization on the materials to produce a latex polymer by using the emulsion polymerization method; adding an after-treating agent to process the latex polymer; and performing spray drying on the mixture to obtain the polyvinyl chloride powder, of which 80 percent has the particle diameter of about 33 mu m so as to ensure that the polymer has proper molecular weight and molecular weight distribution, stable molecular structure, superior powder flowability and high thermal stability. The method solves the problems of the conventional polyvinyl used for producing the baffle plate of the storage battery through the set formula for the materials of the polymerization and process optimization, so the method completely meets the requirement of the standard for producing the polyvinyl chloride powder for the baffle plate of the storage battery and provides the high-quality polyvinyl chloride powder which meets the national standard for the production of the baffle plate of the storage battery.

Description

technical field [0001] The invention discloses a polyvinyl chloride powder production method for preparing lead-acid battery separators, belonging to the field of vinyl chloride monomer emulsion polymerization methods. Background technique [0002] Lead-acid battery is a chemical power source with a wide range of uses, and the separator is one of the three main components of the battery. As an electrical equipment, the separator must have: stable chemical properties, good microporous structure, high mechanical strength, and no harmful substances to the battery. The advantages and disadvantages of these characteristics have a great influence on the function and service life of the battery. With the improvement of the battery itself, the material of the separator is constantly updated. In the 1950s, the microporous rubber separator replaced the wooden separator with poor performance. Now it is widely used as the sintered polyvinyl chloride microporous separator on the car bat...

Claims

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Application Information

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IPC IPC(8): C08F114/06C08F2/26C08J3/12H01M2/16H01M50/417H01M50/491
CPCY02E60/10
Inventor 王春生李承东周斌夏正东余俊生
Owner 武汉祥龙电业股份有限公司
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