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Polybutadiene grafted isoprene rubber and preparation method thereof, vulcanizate and rubber compound

A technology of polybutadiene and isoprene rubber, which is applied in the field of polybutadiene grafted isoprene rubber and its preparation, vulcanized rubber and mixed rubber, which can solve the problems of unfavorable heat transfer, unfavorable cold flow of raw rubber, and rubber Problems such as high liquid viscosity

Active Publication Date: 2014-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the progress of the industrialization of isoprene rubber, people in the industry also discovered some disadvantages of rare earth isoprene rubber, such as the excessive viscosity of the glue solution in the late stage of the polymerization reaction, which is not conducive to the heat transfer of the system and the transportation of the glue solution, and the viscosity of the raw rubber. Cold flow is not conducive to storage and transportation and other disadvantages

Method used

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  • Polybutadiene grafted isoprene rubber and preparation method thereof, vulcanizate and rubber compound
  • Polybutadiene grafted isoprene rubber and preparation method thereof, vulcanizate and rubber compound

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preparation example Construction

[0024] The preparation method of polybutadiene grafted isoprene rubber provided by the invention comprises the following steps:

[0025] (1) In the presence of the first catalyst, butadiene is polymerized in the first organic solvent, the conditions of the polymerization reaction are such that the number average molecular weight is 2000-10000, preferably 3000-7500, and the molecular weight distribution is 2-3 polybutadiene, and 80-95 mole % of said polybutadiene contains conjugated double bonds;

[0026] (2) In the presence of a second catalyst, the polybutadiene obtained in step (1) is contacted with isoprene in a second organic solvent, and the contact conditions are such that the polybutadiene and isoprene The diene is copolymerized to obtain a number average molecular weight of 2×10 5 -5×10 5 , preferably 3×10 5 -4×10 5 , a polybutadiene grafted isoprene rubber with a molecular weight distribution of 3-4; based on the total weight of the polybutadiene and isoprene, the...

preparation example 1

[0062] This preparation example is used to illustrate the nickel-based catalyst provided by the present invention and its preparation method.

[0063] Under nitrogen protection at 10 °C, 0.3 mol nickel naphthenate (purchased from Shanghai Minghuan Chemical Co., Ltd., the same below), 3 mol sesquiethyl aluminum chloride, 0.45 mol N-methylpyrrolidone (NMP) and 2L of hexane was mixed evenly in a dry aging tank and aged for half an hour to obtain a nickel-based catalyst with a concentration of 0.15 mol / L (calculated as nickel element).

preparation example 2

[0065] This preparation example is used to illustrate the neodymium-based catalyst provided by the present invention and its preparation method.

[0066] Under nitrogen protection, mix 180ml of 0.05mol / L hexane solution of neodymium neodecanoate, 45ml (0.45mol) isoprene and 1kg of hexane, and adjust the temperature to 10°C, add 34ml of A hexane solution of 0.8mol / L diethylaluminum chloride was aged for 15 minutes; after adding 50ml of a hexane solution of triisobutylaluminum with a concentration of 2mol / L, the aging was continued for 24h to obtain a concentration of 0.005mol / L (calculated as neodymium element) neodymium-based catalyst.

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Abstract

The invention provides a polybutadiene grafted isoprene rubber and a preparation method thereof / the polybutadiene grafted isoprene rubber prepared by using the method, and a rubber compound and a vulcanizate prepared by using the polybutadiene grafted isoprene rubber. The polybutadiene grafted isoprene rubber comprises, on the basis of the total weight of the polybutadiene grafted isoprene rubber, 0.5 to 8 wt% of a butadiene constitutional unit and 92 to 99.5 wt% of an isoprene constitutional unit; the polybutadiene grafted isoprene rubber has number-average molecular weight of 2 * 10<5> to 5 * 10<5>, molecular weight distribution of 3 to 4, a branching factor of 0.5 to 0.98 and cis-1,4 structure content of 95 to 99 wt%. The polybutadiene grafted isoprene rubber provided by the invention has excellent mechanical properties and good processability. Moreover, the preparation method is simple and easily controllable, can highly efficiently and accurately control the composition and molecular weight of a prepared polymer and has good industrial application prospects.

Description

technical field [0001] The present invention relates to a kind of polybutadiene grafted isoprene rubber, a kind of preparation method of polybutadiene grafted isoprene rubber and the polybutadiene grafted isoprene rubber and vulcanized rubber and the mixture prepared by the method Rubber mixing. Background technique [0002] In recent years, with the rapid development of my country's automobile industry and highway construction, the demand for natural rubber has continued to rise. However, most parts of our country are located in the subtropical zone, with insufficient natural rubber resources and limited development space. Therefore, realizing the industrialization of synthetic natural rubber has become a hot spot that industry people pay attention to in recent years. Since the microstructure and mechanical properties of rare earth isoprene rubber are most similar to natural rubber, it can partially or even completely replace natural rubber in rubber products using natura...

Claims

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Application Information

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IPC IPC(8): C08F279/02C08F236/08C08L51/04
CPCC08F279/02C08F236/02C08F136/06C08F4/70C08F36/04C08J3/24C08L9/00C08F253/00C08F279/00C08L51/04
Inventor 孙伟张杰李传清赵姜维杨亮亮辛益双谭金枚欧阳素芳于国柱
Owner CHINA PETROLEUM & CHEM CORP
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