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Homogeneous catalyst for preparing trans-1,4-polyisoprene polymer, its preparation method and application

A technology of polyisoprene and homogeneous catalyst, applied in the field of catalysts, can solve the problems of uneven polymerization in polymerization reaction, difficult to control and control the production process, etc., and achieve the effects of reducing maintenance frequency, improving production efficiency, and stably conveying

Active Publication Date: 2022-05-10
青岛竣翔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of uneven polymerization and difficult regulation of the production process in the prior art, the invention provides a homogeneous catalyst for preparing trans-1,4-polyisoprene polymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation of embodiment 1 homogeneous catalyst

[0020] Under the protection of nitrogen, the supported titanium-based catalyst TiCl with a molar ratio of 1:1:1 4 / MgCl 2 , AlR 3 The alkylaluminum cocatalyst tripropylaluminum and the polyisoprene polymer are sequentially added into the reaction vessel, and reacted at 0°C for 240 minutes to obtain a homogeneous catalyst; the number average molecular weight of the polyisoprene polymer is 1000 , the mass fraction of cis-1,4-polyisoprene in the polyisoprene polymer is 35%, and the obtained homogeneous catalyst has a room temperature viscosity of 10 pa.s.

Embodiment 2

[0021] The preparation of embodiment 2 homogeneous catalyst

[0022] Under the protection of nitrogen, the supported titanium-based catalyst TiCl with a molar ratio of 1:10:50 4 / MgCl 2 , AlR 3 The alkylaluminum cocatalyst triethylaluminum and the polyisoprene polymer are sequentially added into the reaction vessel, and reacted at 60° C. for 10 minutes to obtain a homogeneous catalyst; the number average molecular weight of the polyisoprene polymer is 10,000 , the mass fraction of cis-1,4-polyisoprene in the polyisoprene polymer is 60%, and the viscosity of the obtained homogeneous catalyst at room temperature is 105 pa.s.

Embodiment 3

[0023] Preparation of embodiment 3 homogeneous catalyst

[0024] Under the protection of nitrogen, the supported titanium-based catalyst TiCl with a molar ratio of 1:5:25 4 / MgCl 2 , AlR 3 The alkylaluminum cocatalyst triisobutylaluminum and the polyisoprene polymer are sequentially added into the reaction vessel, and reacted for 120 min at 30° C. to obtain a homogeneous catalyst; the number average molecular weight of the polyisoprene polymer is 5000, the mass fraction of cis-1,4-polyisoprene in the polyisoprene polymer is 80%, and the room temperature viscosity of the obtained homogeneous catalyst is 45 pa.s.

[0025]The viscosity of the homogeneous catalyst prepared in Examples 1-3 is suitable. In the preparation process of the homogeneous catalyst, if the addition of polyisoprene polymer is too low, only a paste-like solid mixture containing a large amount of powder can be obtained. The amount of pentadiene polymer was too low to obtain a liquid phase catalyst at all. ...

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Abstract

The invention belongs to the technical field of catalysts for synthesizing trans-1,4-polyisoprene polymers, and discloses a homogeneous catalyst for preparing trans-1,4-polyisoprene polymers, a preparation method and application thereof. The homogeneous catalysts include supported titanium catalysts, AlR 3 Alkyl aluminum cocatalyst and polyisoprene polymer; wherein, the AlR 3 R in the alkylaluminum cocatalyst is C 1 -C 6 The number average molecular weight of the polyisoprene polymer is 1000-10000, and the mass fraction of cis-1,4-polyisoprene in the polyisoprene polymer is not less than 30 %. The homogeneous catalyst of the present invention is a liquid phase catalyst, which avoids problems such as uneven polymerization caused by difficult dispersion of solids, difficult control of polymerization reactions, and large differences in product technical indicators during industrial production and polymerization.

Description

technical field [0001] The invention relates to a catalyst for synthesizing trans-1,4-polyisoprene polymer, in particular to a homogeneous catalyst for preparing trans-1,4-polyisoprene polymer, its preparation method and application. Background technique [0002] Trans-1,4-polyisoprene is a crystalline material that exhibits high modulus and high tensile strength. At present, the polymerization method of trans-1,4-polyisoprene is usually solution polymerization There are two types of polymerization and bulk polymerization. Solution polymerization is convenient for heat transfer and production process control, but the solvent content in the reaction system is as high as 90%, which directly leads to long post-treatment process, many devices, high energy consumption, and brings a lot of environmental protection and safety. aspects of pressure. Although bulk polymerization can perfectly make up for the shortcomings of solution polymerization, such as long process, many devices,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/08C08F4/649C08F4/646C08F2/02
CPCC08F136/08C08F2/02C08F4/649C08F4/646C08F2500/03
Inventor 王萌张杰郑雷臧晓燕荣先超王鸿飞李寿蒲诚勇
Owner 青岛竣翔科技有限公司
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