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Method for preparing nickel series low-mooney high cis-1,4-polybutadiene rubber

A technology of polybutadiene rubber and low Mooney, which is applied in the field of preparation of low Mooney and high cis-polybutadiene rubber, and can solve the problems of polybutadiene molecular weight reduction, polymer strength decline, Affect polymer tensile strength and other issues to achieve the effect of low gel content and high tensile strength

Inactive Publication Date: 2013-06-26
万达集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The molecular weight of the polymer directly affects the tensile strength of the polymer. Generally, the decrease of the molecular weight of the polymer will reduce the tensile strength of the polymer.
The disadvantage of the low molecular weight polybutadiene prepared by the above-mentioned technology is that the polybutadiene molecular weight is reduced while causing the decline of the polymer strength, and all published patents have no reports on how to improve the strength of the low Mooney butadiene rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1.3-butadiene was batch-wise polymerized with a 50-degree polymerization kettle equipped with ribbon stirring, jacket, temperature and pressure indicators. First wash the kettle with clean raffinate oil, and press nitrogen to remove the raffinate oil from the washing kettle. Under the protection of nitrogen, add 282.5 parts of raffinate oil and 54 parts of butadiene to the polymerization kettle, stir evenly, and add naphthene Nitric acid 0.0102mol, triisobutylaluminum 0.235mol, boron trifluoride etherate complex 0.0286mol, isooctyl alcohol 0.0304mol, divinylbenzene 0.122mol, polymerize 3 small experiments at 80°C, add ethanol , anti-aging agent, take out the glue solution, cook it with water steam, and dry it with a hot drum to obtain the product of the present invention.

[0061] Diene conversion rate was 91.4%. The reaction conditions and product test results are shown in Table 1.

Embodiment 2

[0063] Use butene-1 instead of isooctyl alcohol, add 3.7mol of 1-butene, 0.118mol of nickel naphthenate, 0.384mol of triisobutylaluminum, and 0.0358mol of boron trifluoride etherate complex into 54 parts of butadiene , and the conversion rate was 90.2%. All the other are with embodiment 1.

Embodiment 3

[0065] Replace iso-octanol with m-cresol, add 0.0494mol of m-cresol, and the conversion rate of butadiene is 90.8%. All the other are with embodiment 1.

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PUM

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Abstract

The invention provides a method for preparing nickel series low-mooney high cis-1,4-polybutadiene rubber. A solution polymerization reaction is performed by 1,3-butadiene in a polymerization solvent. The preparation method has the beneficial effect that a low-mooney cis rubber with the mooney viscosity between 25 and 40 can be prepared stably, and the prepared low-mooney cis rubber can be kept in a higher tensile strength, achieves the same strength as that of butadiene rubber with mooney viscosity between 40 and 50, and has a low gel content which is less than 0.5 percent.

Description

technical field [0001] The invention belongs to the synthetic field of rubber, and relates to a preparation method of 1,4-polybutadiene rubber with low Mooney value and high cis-type. Background technique [0002] The preparation process of high-cis 1,4-polybutadiene rubber (abbreviated as butadiene rubber) generally adopts solution polymerization method, using cobalt, titanium, nickel, and rare earth as catalyst systems to make 1,3-butadiene Alkene (referred to as Bd) polymerization, the nickel-based catalyst used in industrial production is -Ni-AL-B three-way catalyst, Ni refers to nickel carboxylate salts such as nickel naphthenate, nickel acetate, nickel octanoate, etc., AL refers to triisobutyl Aluminum or triethylaluminum, B refers to boron trifluoride diethyl ether complex or boron trifluoride butyl ether complex, and the polymerization solvent is saturated aliphatic hydrocarbon, aromatic hydrocarbon, cycloalkane or their mixture in liquid state during polymerization,...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F4/70C08F2/38
Inventor 尚吉永王朝文郝玉杰谢丰鸣李景亮
Owner 万达集团股份有限公司
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