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Industrial production method of polypropylene resin for battery diaphragm

A technology of polypropylene resin and production method, which is applied in the production of bulk chemicals, battery components, circuits, etc., can solve the problems of insufficient fluidity and unseen polypropylene resin, and achieve easy control of the production process and low unit volume Effect of high production capacity and low ash and chloride content

Pending Publication Date: 2021-06-01
SHAANXI YANCHANG CHINACOAL YULIN ENERGY CHEM
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Problems solved by technology

Chinese patent CN111019026A adopts the batch bulk polymerization method, and the polymerization reaction is carried out in a tank reactor. The isotacticity of the polypropylene resin product is above 98.8%, the melt index is 0.3-2.1g / 10min, and the fluidity is insufficient.
[0006] At present, there is no report on the production of polypropylene resin for low-ash battery separators developed by Sinopec's second-generation loop pipe process equipment

Method used

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the examples, which are only used to explain the present invention, rather than limit the protection scope of the present invention.

[0033] (1) Industrial production method of low ash polypropylene resin product

[0034] 1. Overview of production methods

[0035] The invention adopts the production process of the liquid-phase bulk polymerization method, the polymerization reaction is carried out in a tubular reactor, and the polypropylene resin with the property of the battery diaphragm is produced by using the ultra-high activity catalyst (HCAT) for the first time. The HCAT catalyst that the present invention adopts belongs to the titanium series catalyst of non-o-phthalic internal electron donor, and the main characteristic of catalytic polymerization reaction is ultra-high activity (the reason of high activity is just that it contains internal electron donor, compares o-phthalic int...

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Abstract

The invention discloses an industrial production method of polypropylene resin for a battery diaphragm. In a double-ring-tube reactor, an HCAT catalyst is used for producing polypropylene powder, the polypropylene powder and a resin additive are subjected to melt extrusion granulation, the obtained polypropylene resin product has the characteristics of high isotacticity and low ash content, and the product is mainly used as a battery diaphragm raw material and is applied to the lithium ion battery industry.

Description

technical field [0001] The invention relates to a film polypropylene material, in particular to an industrialized production method of polypropylene resin for a battery separator. Background technique [0002] Due to its high energy density, long cycle life, light weight, small size, and other advantages, lithium-ion batteries are safe, reliable, and can be quickly charged and discharged. The demand for high-energy and high-power power supplies has grown significantly. The market huge. At present, lithium-ion batteries are mainly used in electronic products such as mobile phones, notebook computers, and tablet computers. With the development of new energy technologies such as electric vehicles, the application range of lithium-ion batteries continues to expand, and the demand for diaphragm materials has further increased. In the structure of lithium-ion batteries, the separator is one of the key inner components. The main function of the diaphragm is to separate the posit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/649C08F2/01H01M50/417
CPCC08F110/06C08F4/6491C08F2/01Y02P20/52
Inventor 刘升李国军汪涛赵建光田元智荣超高杰王溆天段青国
Owner SHAANXI YANCHANG CHINACOAL YULIN ENERGY CHEM
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