Production method of 1-hexene copolymerized linear polyethylene resin

A technology for copolymerizing linear polyethylene resin with hexene, applied in the field of polymer material composition, can solve problems such as difficulty in meeting performance requirements, and achieve the effects of satisfying performance requirements, improving performance and low flexural modulus

Active Publication Date: 2019-03-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN201580036176.5 discloses a cast membrane module layer exhibiting excellent adhesion properties, the melt flow rate of the patented product is only 1.98-2.16g / 10 minutes, it is difficult to meet the current requirements for its performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of production method of 1-hexene copolymerized linear polyethylene resin, comprises the following steps:

[0022] (1) On the Unipol polyethylene process unit, ethylene, hydrogen, and 1-hexene are used as raw materials, and Ziegler-Natta Ti-based catalysts are used to react in a gas-phase fluidized bed reactor to control the reaction in the reactor The pressure is 1.8MPa, the reaction temperature is 80°C, the partial pressure of ethylene is 0.72MPa, the partial pressure ratio of hydrogen / ethylene is 0.65, and the partial pressure ratio of 1-hexene / ethylene is 0.25, and the copolymer powder is obtained;

[0023] (2) Add 0.03% antioxidant 1076, 0.04% antioxidant 168, and 0.15% heat stabilizer to the copolymer powder prepared in step (1), granulate the material, and dry the material to obtain 1-hexene copolymer Linear polyethylene resin.

Embodiment 2

[0025] A kind of production method of 1-hexene copolymerized linear polyethylene resin, comprises the following steps:

[0026] (1) On the Unipol polyethylene process unit, ethylene, hydrogen, and 1-hexene are used as raw materials, and Ziegler-Natta Ti-based catalysts are used to react in a gas-phase fluidized bed reactor to control the reaction in the reactor The pressure is 2.0MPa, the reaction temperature is 80°C, the ethylene partial pressure is 0.75MPa, the hydrogen / ethylene partial pressure ratio is 0.68, and the 1-hexene / ethylene partial pressure ratio is 0.3 to obtain the copolymer powder;

[0027] (2) Add 0.05% antioxidant 1076, 0.06% antioxidant 168, and 0.10% heat stabilizer to the copolymer powder prepared in step (1), granulate the material, and dry the material to obtain 1-hexene copolymer Linear polyethylene resin.

Embodiment 3

[0029] A kind of production method of 1-hexene copolymerized linear polyethylene resin, comprises the following steps:

[0030] (1) On the Unipol polyethylene process unit, ethylene, hydrogen, and 1-hexene are used as raw materials, and Ziegler-Natta Ti-based catalysts are used to react in a gas-phase fluidized bed reactor to control the reaction in the reactor The pressure is 1.8MPa, the reaction temperature is 85°C, the ethylene partial pressure is 0.78MPa, the hydrogen / ethylene partial pressure ratio is 0.7, and the 1-hexene / ethylene partial pressure ratio is 0.32 to obtain the copolymer powder;

[0031] (2) Add 0.02% antioxidant 1076, 0.08% antioxidant 168, and 0.05% heat stabilizer to the copolymer powder prepared in step (1), granulate the material, and dry the material to obtain 1-hexene copolymer Linear polyethylene resin.

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Abstract

The invention discloses a production method of 1-hexene copolymerized linear polyethylene resin. The method includes the steps of: (1) on a Unipol polyethylene process unit, taking ethylene, hydrogenand 1-hexene as the raw materials, using a Ziegler-Natta Ti based catalyst, carrying out reaction in a gas-phase fluidized bed reactor to obtain copolymer powder; and (2) adding an antioxidant and heat stabilizer into the copolymer powder obtained by step (1), conducting material granulation and drying, thus obtaining the 1-hexene copolymerized linear polyethylene resin. The 1-hexene copolymerizedlinear polyethylene resin prepared by the method provided by the invention has high quality stability, and greatly improved performance compared with the copolymers produced by the existing technology, especially higher melt flow index, tensile breaking strength, tensile elongation at break, tensile yield strength, tensile yield elongation and other data, and lower bending modulus, is very suitable for application to automobile fenders, and can effectively meet the ever-increasing performance requirements for polyethylene.

Description

technical field [0001] The invention relates to the technical field of polymer material compositions, in particular to a production method of 1-hexene copolymerized linear polyethylene resin. Background technique [0002] Polyethylene is an important synthetic resin with a wide range of uses. In the process of producing high-density polyethylene or linear low-density polyethylene, by adding unsaturated olefin comonomers with more than 3 carbon atoms to copolymerize with ethylene, this can reduce the density of the polymer, thereby controlling the melt flow of the product Index (MIR), improve machinability and heat resistance. The higher the carbon number of the comonomer, the better the overall performance of the polymer. At present, there are mainly three types of PE comonomers: C4 (1-butene), C6 (1-hexene) and C8 (1-octene). Among them, butene copolymerized polyethylene is the PE variety with the largest production volume in the world, and 1-hexene copolymerized polyeth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/134C08K5/526C08K5/098C08F210/16
CPCC08F210/16C08K5/098C08K5/1345C08K5/526C08F210/14C08F2500/12C08F2500/18C08L23/0815Y02P20/52
Inventor 许敏蔡伟梁胜彪李静静邵磊山彭叶岑静芸柒兵文王碧琼
Owner CHINA PETROLEUM & CHEM CORP
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