Preparation method of isoprene rubber

A technology of isoprene rubber and isoprene, which is applied in the field of preparation of isoprene rubber, can solve problems such as poor performance of isoprene rubber and difficulty in glue transportation

Active Publication Date: 2013-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of difficulty in glue transportation and the poor performance of the obtained isoprene rubber when the existing method is used to produce pol

Method used

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  • Preparation method of isoprene rubber
  • Preparation method of isoprene rubber

Examples

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Effect test

Embodiment 1

[0041] This example is used to illustrate the preparation of the isoprene rubber provided by the present invention.

[0042] according to figure 2 The polymerization reaction device shown is for the preparation of isoprene rubber, wherein, the capacity of all polymerization reaction tanks is 5L. With the flow rate of isoprene monomer at 0.93L / h, the flow rate of n-hexane at 5L / h, the n-hexane solution of neodymium catalyst (the concentration of catalyst is 0.5×10 -2mol / L) is passed into the first kettle 5 with a flow velocity of 0.29L / h. Based on the total weight of the isoprene monomer, n-hexane and catalyst, the total content of isoprene monomer and isoprene rubber in the first kettle 5 is 15.3% by weight. After 48 minutes of polymerization in the first kettle 5, the conversion rate of isoprene monomer was 58%, and the first supplementary solvent device 9 between the first kettle 5 and the second kettle 6 was opened. Adjust the frequency of the metering pump to be 28Hz, ...

Embodiment 2

[0047] This example is used to illustrate the preparation of the isoprene rubber provided by the present invention.

[0048] according to figure 2 The polymerization reaction device shown is for the preparation of isoprene rubber, wherein, the capacity of all polymerization reaction tanks is 5L. With the flow rate of isoprene monomer at 1.1L / h, the flow rate of n-hexane at 4.9L / h, the n-hexane solution of neodymium catalyst (the concentration of catalyst is 0.6×10 -2 mol / L) is passed into the first kettle 5 with a flow velocity of 0.278L / h. Based on the total weight of the isoprene monomer, n-hexane and catalyst, the total content of isoprene monomer and isoprene rubber in the first kettle 5 is 17.3% by weight. After 47.8 minutes of polymerization in the first kettle 5, the conversion rate of isoprene monomer was 60%, and the first additional solvent addition device 9 between the first kettle 5 and the second kettle 6 was opened. Adjust the frequency of the metering pump t...

Embodiment 3

[0053] This example is used to illustrate the preparation of the isoprene rubber provided by the present invention.

[0054] according to figure 2 The polymerization reaction device shown is for the preparation of isoprene rubber, wherein, the capacity of all polymerization reaction tanks is 5L. With the flow rate of isoprene monomer at 1.05L / h, the flow rate of n-hexane at 3.62L / h, the n-hexane solution of neodymium catalyst (the concentration of catalyst is 0.5×10 -2 mol / L) is passed into the first kettle 5 with a flow velocity of 0.33L / h. Based on the total weight of the isoprene monomer, n-hexane and catalyst, the total content of isoprene monomer and isoprene rubber in the first kettle 5 is 21% by weight. After 60 minutes of polymerization in the first kettle 5, the conversion rate of isoprene monomer was 60%, and the first additional solvent addition device 9 between the first kettle 5 and the second kettle 6 was opened. Adjust the frequency of the metering pump to b...

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Abstract

The invention provides a preparation method of isoprene rubber. The method comprises the step of reacting an isoprene monomer with a catalyst in the presence of organic solvents under the condition of polymerization reaction and is characterized in that reaction is carried out by multiple stages, wherein the multiple stages include a first reaction stage and reaction stages after the first reaction stage. The method also comprises the step of replenishing the organic solvents to a polymerization reaction system in at least one reaction stage after the first reaction stage. By adopting the method to prepare the isoprene rubber, not only are the production and transport convenient to stabilize but also the isoprene rubber with excellent properties can be obtained.

Description

technical field [0001] The invention relates to a preparation method of isoprene rubber. Background technique [0002] Industrialized commodity isoprene rubber is similar in structure to natural rubber, has excellent raw rubber strength and vulcanized rubber properties, and can meet the development needs of tires in terms of high speed, energy saving, safety and environmental protection. The production of rare earth isoprene rubber is mainly obtained by continuous solution polymerization using rare earth as a catalyst. In order to realize continuous industrial production, a polymerization reactor is generally composed of several polymerization reactors connected in series, and the final conversion rate of isoprene monomer reaches about 90%. Due to the large heat release of isoprene monomer in the polymerization process, the viscosity of isoprene rubber glue is also very large, which limits the single concentration of isoprene rubber in the production process. The single co...

Claims

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Application Information

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IPC IPC(8): C08F136/08C08F2/01C08F2/06
Inventor 张杰李传清于国柱辛益双杨亮亮谭金枚欧阳素芳赵姜维孙伟徐林梁爱民
Owner CHINA PETROLEUM & CHEM CORP
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