Preparation method for butadiene rubber

A technology of butadiene rubber and butadiene, which is applied in the field of butadiene rubber and its preparation, can solve the problems of easy hanging on the wall and poor cold flow of raw rubber, and achieve the goal of reducing molecular weight, improving cold flow of raw rubber, and low molecular weight Effect

Inactive Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technologies all have the defects of easy hanging on the wall during production and poor cold flow of raw rubber.

Method used

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  • Preparation method for butadiene rubber
  • Preparation method for butadiene rubber
  • Preparation method for butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 5L polymerization kettle that has been vacuum pumped and replaced three times with high-purity nitrogen, 350g of butadiene, 6.8g of liquid polybutadiene (the mass content of 1,2-structure is 72%, and the number average molecular weight is 1.24 ×10 4 , molecular weight distribution 1.78) and 2250g hexane were mixed uniformly in the polymerization kettle, and then the catalyst aging solution 1) was added, Ni / Bd=1×10 -4 , at 50°C, the pressure is 0.25MPa, and the polymerization reaction is 5h; after the polymerization is completed, 100ml of 2,6-di-tert-butylhydroquinone ethanol solution with a mass concentration of 3% by weight is added to terminate the reaction, and the polymer gel is obtained. liquid. The polymer glue was precipitated, washed, and dried to obtain 343 g of branched nickel-based butadiene rubber. The properties of the obtained branched nickel-based butadiene rubber are listed in Table 1.

Embodiment 2

[0037] Adopt the same method as Example 1 to prepare branched nickel-based butadiene rubber, the difference is that, based on the amount of butadiene, the amount of liquid polybutadiene is 1% by weight, and the catalyst is a catalyst aging liquid 2), at 45°C, the pressure is 0.2MPa, and the polymerization reaction is 4h, the properties of the obtained branched nickel-based butadiene rubber are listed in Table 1.

Embodiment 3

[0039] Adopt the same method as Example 1 to prepare branched nickel-based butadiene rubber, the difference is that based on the amount of butadiene, the amount of liquid polybutadiene is 10% by weight, and the catalyst is catalyst aging Solution 3), at 30°C, pressure 0.4MPa, polymerization reaction 6h, the properties of the obtained branched nickel-based butadiene rubber are listed in Table 1.

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Abstract

The invention provides a preparation method for butadiene rubber, belonging to the field of synthesis of polymers. The preparation method is characterized in that butadiene and a branching agent undergo polymerization in an organic solvent in the presence of a nickel-series catalyst, wherein the branching agent is liquid polybutadiene. Compared with nickel-series butadiene rubber prepared in the prior art, the branched nickel-series butadiene rubber prepared in the invention has a larger application scope since the butadiene rubber liquid has low viscosity and is not prone to adhesion on wallsand the raw butadiene rubber has improved cold flow properties and good processing performance; and when the branched nickel-series butadiene rubber prepared in the invention is applied to preparation of vulcanized rubber, the prepared vulcanized rubber has good mechanical properties.

Description

technical field [0001] A butadiene rubber and a preparation method thereof belong to the field of polymer synthesis. Background technique [0002] Butadiene rubber has the advantages of high elasticity, low heat generation, low temperature resistance, low rolling resistance, flex resistance, wear resistance, water resistance, etc. The polymerization process is easy to operate, and the raw materials are cheap and easy to obtain, so it is widely used in tires and belts. , rubber hose, rubber shoes and other manufacturing industries. The traditional way to adjust the branching degree of nickel-based butadiene rubber is to change the amount of organic nickel in the catalyst component and the polymerization temperature to achieve. In the prior art, under the catalyst system of organic nickel compound-organoaluminum compound-BF3 compound, the branching degree of nickel-based butadiene rubber is adjusted by changing the type and amount of main and co-catalysts in the catalyst, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08F236/06C08F4/70
CPCC08F4/7098C08F279/02C08F236/06
Inventor 华静陈兆辉徐玲焦胜成耿洁婷李海强薛美玉贾凤玲徐海兵徐璇胡程鹏蒋秀荣
Owner CHINA PETROLEUM & CHEM CORP
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