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1-butene/ethylene/advanced alpha-olefin terpolymer as well as preparation method and application thereof

An olefin terpolymer and olefin polymerization technology, applied in the polymer field, can solve the problem of high flexural modulus

Inactive Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] WO1999 / 045043 discloses the stereospecific MgCl 2 1-butene polymer with high crystallinity and broad molecular weight distribution obtained under the action of supported catalyst, which has a molecular weight distribution (MWD) of 6 or higher, but its flexural modulus is too high

Method used

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  • 1-butene/ethylene/advanced alpha-olefin terpolymer as well as preparation method and application thereof
  • 1-butene/ethylene/advanced alpha-olefin terpolymer as well as preparation method and application thereof
  • 1-butene/ethylene/advanced alpha-olefin terpolymer as well as preparation method and application thereof

Examples

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preparation example Construction

[0022] The preparation method of 1-butene / ethylene / higher α-olefin terpolymer provided by the invention comprises:

[0023] Mode (1): 1-butene, ethylene and a monomer mixture of higher α-olefins are subjected to olefin polymerization in the presence of a Ziegler-Natta catalyst system, and the monomer mixture contains 50-99mol% of 1-butane Olefin, 0.1-30mol% ethylene and 0.1-20mol% higher α-olefin, the conditions of the olefin polymerization reaction make the obtained 1-butene / ethylene / higher α-olefin terpolymer at 190 ℃, 2.16kg The melt index is 0.5-100g / 10min, and the molecular weight distribution index is 4-10;

[0024] Mode (2): The monomer mixture of 1-butene, ethylene and higher α-olefins is carried out in different reactors for olefin polymerization in the presence of Ziegler-Natta catalyst system, and after the olefin polymerization is completed, each reaction The reaction products in the reactor are mixed; the corresponding monomer mixtures in different reactors each ...

Embodiment 1

[0054] The polymerization reaction is carried out by bulk polymerization method, and the air and trace water in the polymerization reactor are removed in advance at 75°C. Add 10mgMgCl to a 5L high-pressure stainless steel polymerization reactor 2 / TiCl 4 Loaded Ziegler-Natta catalyst, 4ml concentration of 1mol / L triethylaluminum and 3ml concentration of 0.2mol / L cyclohexylmethyldimethoxysilane, feed partial pressure of 0.1MPa of hydrogen, a small amount of The liquid phase 1-butene is added to the reactor, and then the monomers 1-butene, 1-hexene and ethylene are introduced into the reactor under the mass flow meter, and the monomer molar ratio is 1-butene: ethylene : 1-hexene is 97:1:2. Stirring was carried out at a stirring speed of 500 rpm, and the reaction was carried out at a polymerization temperature of 75° C. for 1 h. After the reaction was completed, the remaining reaction monomers were discharged to terminate the reaction, and the analysis results of the obtained ...

Embodiment 2

[0056] The catalyst used in embodiment 2, polymerization process conditions and auxiliary agent formula are identical with embodiment 1. The difference from Example 1 is that the molar feed ratio of 1-butene, ethylene and 1-hexene is 88:2:10, and the analysis results of the obtained polymer are listed in Table 1.

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Abstract

The invention relates to the field of polymers, in particular to a 1-butene / ethylene / advanced alpha-olefin terpolymer as well as a preparation method and application thereof. The 1-butene / ethylene / advanced alpha-olefin terpolymer contains 50 to 99 mol% of 1-butene derived units, 0.1 to 30 mol% of ethylene derived units and 0.1 to 20 mol% of advanced alpha-olefin derived units, wherein the advancedalpha-olefin has a carbon atom number of 5 or more, and the 1-butene / ethylene / advanced alpha-olefin terpolymer has a melt index of 0.5-100 g / 10 min and a molecular weight distribution index of 4-10 at 190 DEG C under 2.16 kg. The 1-butene / ethylene / advanced alpha-olefin terpolymer can reduce the initial sealing temperature of polyolefin and improve the stripping capacity of polyolefin, and has great advantages in the aspects of cast films, blown films and the like.

Description

technical field [0001] The invention belongs to the field of polymers, and more specifically relates to a 1-butene / ethylene / higher alpha-olefin terpolymer and its preparation method and application. Background technique [0002] 1-Butene copolymer can be used in a wide range of applications due to its excellent pressure resistance, creep resistance, impact resistance and elastic properties, and can be used in the fields of pipes, pipe fittings, films and adhesives. Changing the type and content of the comonomer in the 1-butene copolymer can improve its physical properties and processing performance, and expand the application range of the 1-butene polymer. 1-butene copolymers with low comonomer content generally have good advantages in pressure resistance, creep resistance, impact strength, etc. 1-butene copolymers with high comonomer content are often used as other olefins or polymers Components of a blend of materials that adjust specific properties of the material, such ...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/08C08F210/14C08J5/18C08L23/20
CPCC08F210/16C08F210/08C08J5/18C08J2323/20C08F210/14C08F210/02C08F2500/12C08F2500/26
Inventor 毕福勇宋文波陈明刘振杰斯维
Owner CHINA PETROLEUM & CHEM CORP
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