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A kind of method for preparing isoprene polymer

A technology of isoprene and polymers, applied in the field of preparing isoprene polymers, can solve the problems of raw rubber strength, low yield strength, low tensile strength, poor stiffness, tensile strength of vulcanized rubber, and tensile stress tearing at constant elongation Strength, high temperature strength, wear resistance and low fatigue life

Active Publication Date: 2019-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, isoprene rubber is lower than natural rubber in terms of raw rubber strength, yield strength, and tensile strength, and has poor stiffness and easy deformation; the tensile strength, modulus stress, tear strength, high temperature strength, and wear resistance of vulcanized rubber Performance and fatigue life are also lower than natural rubber

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  • A kind of method for preparing isoprene polymer

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preparation example Construction

[0020] In the preparation method of isoprene polymer provided by the present invention, the synthetic components of the titanium-based catalyst are fed continuously into the catalyst configuration kettle for reaction aging, and then enter the polymerization kettle in a continuous manner to prepare isoprene vinyl polymers. The catalyst is a product obtained by contacting an alkylaluminum, an electron donor and a titanium halide in a solvent, and the contacted product is a suspension. Since the synthesis components of the titanium-based catalyst are reacted and aged by adopting the continuous feeding method of the present invention, the average particle diameter of the solid particles in the obtained suspension is smaller and the dispersion is more uniform.

[0021] It should be noted that, according to the known content in the art, in the titanium-based catalyst, the titanium halide, the alkylaluminum and the electron donor may undergo group exchange in the suspension and / or c...

Embodiment 1

[0047] This example is used to illustrate the preparation of the isoprene polymer provided by the present invention.

[0048] Under nitrogen protection, triisobutylaluminum (purchased from Yanshan Petrochemical Rubber Factory) was formulated into 0.05mol / L hexane solution; diphenyl ether (purchased from Alpha Aisha Chemical Reagent Company) was formulated into 0.02mol / L hexane solution; Titanium tetrachloride (purchased from Tianjin Guangfu Chemical Reagent Co., Ltd.) was prepared into a 0.05mol / L hexane solution.

[0049] Mix the prepared triisobutylaluminum hexane solution and diphenyl ether hexane solution at -30°C according to the molar ratio of diphenyl ether to triisobutylaluminum at 0.5, and place at -30°C Maintained for 20 minutes to obtain a mixed solution.

[0050] Under mechanical stirring at 200 rpm, at a temperature of -30°C, the above mixed solution and 0.24 L / h titanium tetrachloride hexane solution (titanium tetrachloride and triisobutyl The base aluminum mol...

Embodiment 2

[0053] This example is used to illustrate the preparation of the isoprene polymer provided by the present invention.

[0054] Under nitrogen protection, triisobutylaluminum (purchased from Yanshan Petrochemical Rubber Factory) was formulated into 0.1mol / L hexane solution; diphenyl ether (purchased from Alpha Aisha Chemical Reagent Company) was formulated into 0.05mol / L hexane solution; Titanium tetrachloride (purchased from Tianjin Guangfu Chemical Reagent Co., Ltd.) was prepared into a 0.1mol / L hexane solution.

[0055] Mix the prepared triisobutylaluminum hexane solution and diphenyl ether hexane solution at -30°C according to the molar ratio of diphenyl ether to triisobutylaluminum at 0.5, and place at -30°C Maintained for 20 minutes to obtain a mixed solution.

[0056] Under the mechanical stirring of 200 rpm, at the temperature of -30 ° C, the above mixed solution and 0.12 L / h titanium tetrachloride hexane solution (titanium tetrachloride and triisobutyl The base aluminum...

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Abstract

The invention discloses a method for preparing an isoprene polymer. The method comprises the following steps: under preparation conditions of a titanium catalyst and with stirring, a solution containing titanium halide and solutions which respectively or simultaneously contain alkylaluminium and an electron donor are continuously injected into a catalyst configuration kettle to react and age, and the titanium catalyst obtained by the reaction is led out from the catalyst configuration kettle in a continuous lead-out way and sent into a polyreactor; and under solution polymerization conditions, an isoprene monomer in materials containing the isoprene monomer, the titanium catalyst and a solvent undergoes continuous solution polymerization. By the method for preparation of the isoprene polymer, polyisoprene with higher content of cis-1,4-isoprene structure and lower gel content can be synthesized.

Description

technical field [0001] The present invention relates to a process for the preparation of isoprene polymers. Background technique [0002] Cis-1,4-polyisoprene (isoprene rubber) is a stereoregular elastomer formed by stereospecific polymerization of isoprene monomer under the action of a catalyst. Its chemical structure is very similar to natural rubber, and it is used in many fields similar to natural rubber, such as tires, mechanical products, footwear, seals, adhesives, medical supplies, etc. It can replace natural rubber, so it is commonly known as synthetic natural rubber. It is the third largest type of general-purpose synthetic rubber in the world after styrene-butadiene rubber and butadiene rubber. [0003] During World War II, the supply of natural rubber was in short supply, especially in the United States, which prompted the development of synthetic isoprene rubber. The industrial production of isoprene rubber generally adopts the solution polymerization method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/08C08F4/642
Inventor 吕鹏飞王超谭金枚于浩董新民李传清徐林苏肇庆
Owner CHINA PETROLEUM & CHEM CORP