Preparation method of high modulus and high impact polypropylene resin
A high-impact polypropylene and polypropylene resin technology, applied in the field of polymer materials, can solve the problems of low modulus and achieve the effects of good rigidity and toughness balance, improved modulus, and simple preparation methods
Inactive Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The preparation method of the present invention is simple, and the obtained polypropylene resin has good heat resistance, rigidity and toughness, especially a good balance of rigidity and toughness, and solves the problem of low modulus
Method used
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Embodiment 1～3
[0016] Examples The characteristics of the impact-resistant polypropylene resin are shown in Table 1. The impact polypropylene resin is mixed with additives such as antioxidant, acid neutralizer and nucleating agent, and then granulated by melt extrusion.
[0017] The antioxidant in this example uses tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester and tris(2,4-di-tert-butylphenyl)phosphite The mixture, the ratio of the two is 1:2, the acid neutralizer is calcium stearate, and the nucleating agent is Milliken's new Narsil nucleating agent. The ratio of impact polypropylene resin to antioxidant, acid neutralizer and nucleating agent is 100:0.20:0.06:0.1.
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Abstract
Belonging to the field of polymer technology, the invention in particular relates to a preparation method of high modulus and high impact polypropylene resin. The method specifically includes the steps of: firstly, conducting propylene homopolymerization in a reactor to obtain homo-polypropylene; then subjecting the homo-polypropylene, propylene and ethylene to multiphase copolymerization in a gasphase reactor to obtain anti-impact polypropylene resin; and finally, mixing the anti-impact polypropylene resin, an antioxidant, an acid neutralizer and a nucleating agent and performing granulationso as to obtain the high modulus and high impact polypropylene resin. Specifically, the nucleating agent is a Milliken novel Narsil nucleating agent. The high modulus and high impact polypropylene resin obtained by the method provided by the invention has the advantages of good heat resistance, rigidity and toughness, especially good rigidity-toughness balance, and is especially suitable for application in automobile interior and exterior decoration modified matrixes.
Description
technical field [0001] The invention relates to the technical field of polymer materials, and relates to a preparation method of high modulus and high impact polypropylene resin. Background technique [0002] Homopolypropylene has high isotacticity and good molecular chain regularity, so it has good rigidity and heat resistance, but poor toughness. The method of gas phase copolymerization is used to produce impact polypropylene, so as to improve the toughness of polypropylene. Gas-phase copolymerization of polypropylene: firstly, propylene homopolymerization is carried out in the reactor to obtain homopolypropylene, and then the homopolymerized polypropylene enters the gas-phase reactor, and at the same time, propylene and ethylene are added to the gas-phase reactor for copolymerization. The final impact polypropylene resin is mainly composed of homopolypropylene, ethylene-propylene rubber and a small amount of ethylene-propylene crystallizable copolymer. The ethylene-propy...
Claims
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IPC IPC(8): C08L23/12C08L23/14C08K5/134C08K5/526C08K5/098C08F110/06C08F210/16C08F210/06C08F2/34
CPCC08F2/34C08F110/06C08F210/06C08F210/16C08L23/12C08L2201/08C08L2205/24C08L2308/00C08F210/02C08L23/14C08K5/1345C08K5/526C08K5/098
Inventor 张锋周浩单国荣杨丽丁彬红
Owner CHINA PETROLEUM & CHEM CORP
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