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Stiffened polypropylene resin and preparation method thereof

A polypropylene resin and propylene technology, applied in the field of stiffened polypropylene resin and its preparation, can solve the problems of unsatisfactory rigidity of impact-resistant polypropylene, achieve enhanced stereospecificity, excellent rigidity and impact resistance, and improve crystallization performance effect

Inactive Publication Date: 2017-10-03
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a rigid polypropylene resin and its preparation method to solve the technical problem of unsatisfactory rigidity in the production of low-melt propylene impact-resistant polypropylene in the prior art

Method used

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  • Stiffened polypropylene resin and preparation method thereof
  • Stiffened polypropylene resin and preparation method thereof
  • Stiffened polypropylene resin and preparation method thereof

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[0022] In the prior art, although the rigidity and toughness of polypropylene resin can meet the needs of downstream users, its rigidity and impact resistance cannot meet the growing needs of users with the expansion of automotive applications and plastic blending fields. In view of the above technical problems, according to a typical embodiment of the present invention, a method for preparing rigidified polypropylene resin is provided. The preparation method comprises the following steps: ethylene and propylene are polymerized by a gas-phase hydrogenation method under the catalysis of a Ziegler-Natta catalyst, and a stiffening nucleating agent is added in the powder granulation stage to prepare a stiffening Polypropylene resin; wherein, the internal electron donor of the Ziegler-Natta catalyst is a diether internal electron donor.

[0023] In the above preparation method provided by the present invention, ethylene and propylene are catalyzed by a Ziegler-Natta catalyst to pre...

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Abstract

The invention provides stiffened polypropylene resin and a preparation method thereof. The preparation method comprises that ethylene and propylene undergo a polymerization reaction under catalysis of a Ziegler-Natta catalyst by a gas phase hydrogen regulation method, and a stiffening nucleating agent is used in the powder granulation stage so that the stiffened polypropylene resin is obtained, wherein the internal electron donor of the Ziegler-Natta catalyst is a diether-type internal electron donor. The internal electron donor can improve the catalytic activity and stereospecificity of the catalyst, improve polymer isotacticity, reduce xylene soluble content of polypropylene resin and improve polypropylene resin rigidity. In the extrusion granulation in the later period, the stiffening nucleating agent is used, can refine the grains, can improve the crystallization properties of the resin and can enhance rigidity.

Description

technical field [0001] The invention relates to the technical field of polypropylene material preparation, in particular to a reinforced polypropylene resin and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the automobile industry, high-speed trains, construction industry, electronic telecommunications industry and the high performance of polypropylene products, the output and demand of polypropylene have increased significantly, becoming the fastest growing general-purpose plastic in the past ten years. [0003] At present, low-flow impact-resistant resins made of ethylene-propylene copolymers are usually used. Although the rigidity and toughness of the above-mentioned resins basically meet the needs of downstream users, with the expansion of the field of automotive applications and plastic blending, the rigidity of the above-mentioned resins And impact resistance puts forward higher demands. [0004] Based on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08F210/16C08F4/649C08F4/646C08F2/34C08K5/5317
CPCC08F210/06C08K5/5317C08L2205/24C08F210/16C08F2500/12C08F4/6494C08F4/6465C08F2/34Y02P20/52
Inventor 刘义王鹤鸣杜善明吴国祥高文刚郭晓东王俊武王勇韩李旺杨廷杰
Owner CHNA ENERGY INVESTMENT CORP LTD
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