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Polybutadiene rubber, preparation method of polybutadiene rubber and oil-extended rubber

A technology of polybutadiene rubber and oil-extended rubber, which is applied in the field of polybutadiene rubber, can solve the problem of incomplete conversion of monomers, and achieve the effect of wide molecular weight distribution and good rubber processing performance

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has the problem of incomplete monomer conversion at high temperatures.

Method used

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  • Polybutadiene rubber, preparation method of polybutadiene rubber and oil-extended rubber
  • Polybutadiene rubber, preparation method of polybutadiene rubber and oil-extended rubber
  • Polybutadiene rubber, preparation method of polybutadiene rubber and oil-extended rubber

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preparation example Construction

[0018] The preparation method of polybutadiene rubber provided by the present invention comprises: under anion polymerization condition, 1,3-butadiene, solvent and polarity regulator are from the first kettle of the continuous polymerization reaction device that comprises a plurality of serial reaction kettles Introduce continuously, and carry out continuous polymerization in each still of described continuous polymerization reactor successively, wherein, this method also comprises initiator from described first still and at least one reaction still after described first still is introduced, and The temperature of anionic polymerization is controlled at 90-150°C.

[0019] According to the present invention, as long as the initiator is introduced from the first tank and at least one reaction tank after the first tank at a polymerization temperature of 90-150° C., the conversion rate of the monomer can be increased and the polymer yield can be increased. Molecular weight distrib...

Embodiment 1

[0052] This embodiment is used to illustrate the polybutadiene rubber provided by the present invention and its preparation method.

[0053] The polymerization reaction was carried out in three 5-liter polymerization reactors connected in series. Under the protective atmosphere of high-purity nitrogen, the residence time of materials in a single tank is 15 minutes, the reaction temperature in the polymerization tank is controlled at 130±1°C, and the pressure is controlled at 0.8±0.05MPa (gauge pressure). The feed rate of each reaction material at the bottom of the first kettle is: mixed solvent (a mixture of cyclohexane and n-hexane with a weight ratio of 88:12) 11544g / h, 1,3-butadiene 3256g / h, n-butyl Lithium 0.776g / h, ethyl tetrahydrofurfuryl ether 5.77g / h and 1,2-butadiene 0.98g / h. Add n-butyl lithium to the bottom of the third kettle at 0.041 g / h. A terminator isopropanol was added at 0.77 g / h at the outlet of the third kettle to terminate the reaction, and an anti-aging...

Embodiment 2

[0058] This embodiment is used to illustrate the polybutadiene rubber provided by the present invention and its preparation method.

[0059]The polymerization reaction was carried out in three 5-liter polymerization reactors connected in series. Under the protective atmosphere of high-purity nitrogen, the residence time of materials in a single tank is 20 minutes, the reaction temperature in the polymerization tank is controlled at 120±1°C, and the pressure is controlled at 0.7±0.05MPa (gauge pressure). The feed rate of each reaction material at the bottom of the first kettle is: raffinate 9435g / h, 1,3-butadiene 1665g / h, n-butyllithium 0.254g / h, ethyl tetrahydrofurfuryl ether 4.72g / h h and 1,2-butadiene 0.5g / h. Add n-butyllithium to the bottom of the third kettle at 0.05 g / h. A terminator isopropanol was added at 0.28 g / h at the outlet of the third kettle to terminate the reaction, and an anti-aging agent Irganox1520 of 0.2% by monomer weight was added to obtain a polybutadi...

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Abstract

The invention provides polybutadiene rubber, a preparation method of the polybutadiene rubber, the polybutadiene rubber prepared with the method and oil-extended rubber. The preparation method of the polybutadiene rubber comprises steps as follows: under the anionic polymerization condition, 1,3-butadiene, a solvent and a polarity modifier are continuously introduced into a first kettle of a continuous polymerization reaction device comprising a plurality of serially-connected reaction kettles, and continuous polymerization is performed in all kettles of the continuous polymerization reaction device sequentially; an initiator is introduced into the first kettle and at least one reaction kettle behind the first kettle, and the anionic polymerization temperature is controlled to range from 90 DEG C to 150 DEG C. With the adoption of the preparation method of the polybutadiene rubber, the monomer conversion rate can be increased, and MVBR (medium-vinyl polybutadiene rubber) with wider molecular weight distribution can be obtained.

Description

technical field [0001] The invention relates to a polybutadiene rubber, a preparation method of the polybutadiene rubber, a polybutadiene rubber prepared by the method and an oil-extended rubber. Background technique [0002] Medium vinyl polybutadiene rubber (MVBR) refers to polybutadiene rubber with a vinyl content of 35-55% by weight. Using n-butyllithium (n-BuLi) as an initiator, adopting a polar structure regulation system, and carrying out anionic polymerization of butadiene in a non-polar solvent, it is possible to prepare a medium with a 1,2-structure content of 35-55% by weight Vinyl polybutadiene rubber. Since the MVBR molecular chain contains more vinyl groups and the saturation of the main chain is low, MVBR has the advantages of good wet skid resistance, heat aging resistance, and fast relaxation. Oil-extended MVBR is filled with cheaper extender oils such as petroleum fractions, which can not only increase production and reduce costs, but also improve the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/06C08F2/40C08F2/38C08L9/00
Inventor 吕万树徐林董新民李传清解希铭吕鹏飞胡保利邰峰赵晓冬
Owner CHINA PETROLEUM & CHEM CORP
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