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Production method of lithium ion battery barrier membrane homo-polypropylene special material

A technology for homopolypropylene and lithium-ion batteries, which is applied in the field of polyolefin polymerization, and can solve problems that do not involve special materials for homopolypropylene for lithium-ion electronic barrier films.

Active Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

The above-mentioned relevant patents do not involve the preparation and application of homopolypropylene special materials for lithium-ion electronic barrier films

Method used

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Embodiment Construction

[0012] According to the technical solution of the present invention, propylene polymerization is carried out under the following conditions. Main catalyst: commercially available ND-II propylene polymerization main catalyst is selected; external electron donor: D donor + T-donor (mixing ratio 1:4), the preparation concentration is 0.5mol / L, and the addition amount is 0.6L / hour; The amount of triethylaluminum added is 6.0L / hour; the hydrogenation capacity of the liquid phase reactor is 4.8NM3 / hour, the reaction temperature is 70°C, and the pressure is 30MPa; the polymerization temperature of the gas phase reactor is 80°C, the pressure is 17.0MPa, and the average polymerization load is 9.5 tons / hour Hour. The desired polypropylene powder is obtained.

[0013] The proportion of compound additives used when granulating polypropylene powder is: 1010:3114:168: calcium stearate = 1.0:0.5:1.0:0.2. The composite additives are prepared according to the production of 10 tons of polypro...

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Abstract

The invention discloses a production method of a lithium ion battery barrier membrane homo-polypropylene special material. According to the production method, a propylene polymerization catalyst with high activity and moderate hydrogen regulation sensitivity is used; a propylene polymerization activator is used as triethyl aluminium and the addition amount is controlled to be below 7.0L / hours; and an external electron donor is prepared from bicyclo-amyl dimethoxy silane and tetraethoxysilane in the molar rate of 1:1 and 1:8. In the pelleting workshop section of the special material, a stabilizing agent system consisting of main antioxygen, auxiliary antioxygen, disacidifying agent and the like is added; and a biaxially-oriented polypropylene (BOPP) membrane special material used for producing the lithium ion battery barrier membrane is finally produced, wherein the biaxially-oriented polypropylene (BOPP) membrane special material has the characteristics that the isotacticity is more than 98 percent, the melting flow rate (MFR) is controlled to be 2.8+ / -0.2g / 10min, the ash content is controlled to be 50-100ppm, the volatile matter is less than 100ppm, the oxidation induction time is more than 15min and the molecular weight distribution is controlled to be 7.0-10.0.

Description

technical field [0001] The invention relates to a production method of a special homopolypropylene material for barrier films of lithium-ion batteries, belonging to the field of polyolefin polymerization. Background technique [0002] Due to the advantages of high working voltage, low self-discharge rate, high energy density (light weight), no memory effect, long cycle life, and no pollution, lithium-ion batteries have gradually replaced traditional lead-acid batteries and nickel-cadmium batteries and become a variety of The main power supply of electronic products, in addition to being widely used in rechargeable batteries required for portable electronic products (such as mobile phones, notebook computers, camcorders, etc.), in aerospace, navigation, artificial satellites, small medical, military communication equipment and other fields It has also been applied, especially with the increasing tension of non-renewable resources such as petroleum and the improvement of envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/00C08K5/134C08K5/3492C08K5/526C08K5/098C08F110/06C08F2/02C08F4/58H01M2/16B29B9/06B29C47/92B29C48/92H01M50/403H01M50/417H01M50/489H01M50/491
CPCC08F110/06C08J5/18C08K5/098C08K5/1345C08K5/34924C08K5/526C08J2323/12C08L2203/20C08L2203/16H01M50/403C08F4/58C08F2500/15C08F2500/12C08F2500/04C08L23/12Y02P20/52Y02E60/10
Inventor 曹豫新况成承梁万军张锋周宝森王胜利薛正伟侯卫峰徐剑虹张双萍汪东华毛健康李中新
Owner CHINA PETROLEUM & CHEM CORP
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