1,3-conjugated diene/monovinylarene copolymer and its continuous polymerization production method

A technology of monovinylarene and conjugated diene, which is applied in the production field of 1,3-conjugated diene/monovinylarene copolymer and its continuous polymerization, and can solve the problems of high Mooney viscosity and monomer conversion rate Low continuous production efficiency, extended residence time and other issues, to achieve the effect of high Mooney viscosity

Active Publication Date: 2015-09-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the continuous polymerization in the prior art to produce 1,3-conjugated dienes / monovinylarene copolymers, in order to obtain medium vinyl content, higher molecular weight 1,3-conjugated dienes / monovinylarene copolymer, it is necessary to prolong the residence time of polymerization to increase the monomer conversion rate during polymerization, resulting in the disadvantage of low continuous production efficiency, and to provide a high monomer conversion rate during polymerization within a reasonable residence time , and the method for obtaining vinyl 1,3-conjugated diene / monovinylarene copolymer in continuous polymerization production with high Mooney viscosity of styrene-butadiene copolymer

Method used

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  • 1,3-conjugated diene/monovinylarene copolymer and its continuous polymerization production method
  • 1,3-conjugated diene/monovinylarene copolymer and its continuous polymerization production method
  • 1,3-conjugated diene/monovinylarene copolymer and its continuous polymerization production method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The continuous polymerization process was adopted in the experiment, and the reaction was carried out in two 5-liter polymerization reactors connected in series. Under the protective atmosphere of high-purity nitrogen, the pressure in the polymerization kettle is controlled at 0.7Mpa (gauge pressure), and 700g of cyclohexane and normal hexane (cyclohexane and normal hexane, weight ratio is 88:12) are added to the first kettle, and the After the jacket is warmed up to 100°C, continuously add cyclohexane and n-hexane mixed solvent and monomer in the aforementioned weight ratio of 25°C to the first kettle, and the feed rate of various reaction materials is: mixed solvent (cyclohexane and n-hexane alkanes, the weight ratio is 88:12) 3538g / h, 1,3-butadiene 669g / h, styrene 329g / h, ethyl tetrahydrofurfuryl ether 1.810g / h, n-butyllithium 0.2201g / h and 1,2-butadiene 0.2495g / h. The reaction pressure of each polymerization tank is 0.6-0.8Mpa, the reaction temperature is 125°C, an...

Embodiment 2

[0043] Using the same experimental conditions as in Example 1, the only difference is that the amount of n-butyllithium added is 0.2661g / h, and the data of the measured samples are shown in Table 1 and Table 2.

Embodiment 3

[0045] Using the same experimental conditions as in Example 1, the only difference is that the amount of 1,2-butadiene added is 0.1996 g / h. The measured data of the samples are shown in Table 1 and Table 2.

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Abstract

The invention discloses a method for producing a 1,3-conjugated diene / monovinyl aromatic hydrocarbon copolymer through continuous polymerization. The method comprises the following steps of: continuously feeding reaction materials containing monomers a, an organic solvent, alkyl tetrahydrofurfuryl ether and organic lithium into a reaction kettle, and causing the monomers a to be in contact with the organic lithium under an anion polymerization condition, thereby obtaining the copolymer, wherein the monomers a refer to monovinyl aromatic hydrocarbon and 1,3-conjugated diene, and the reaction materials further contain a gelation inhibitor 1,2-butadiene, and on the basis of the weight of the monomers a, the dosage of the 1,2-butadiene or 1-butyne is 100-250 ppm. The method has the advantages that high conversion ratio can be achieved in short polymerization stay time and the obtained copolymer is high in vinyl content and Mooney viscosity.

Description

technical field [0001] The present invention relates to 1,3-conjugated diene / monovinylarene copolymer and its continuous polymerization production method. Background technique [0002] Solution polystyrene-butadiene rubber (SSBR) is a general-purpose rubber with comprehensive properties between emulsion polystyrene-butadiene rubber (ESBR) and butadiene rubber (BR). In actual use, compared with ESBR, it has the advantages of wear resistance, flex resistance, low temperature resistance, low heat generation, and small rolling resistance; It has the advantages of high strength, tear resistance and wet skid resistance. In terms of processing performance, SSBR compound rubber has small shrinkage, smooth extruded surface, good molding fluidity, clear vulcanized rubber patterns and bright colors, and can be widely used in tire tread rubber, shoe industry and other rubber industrial products. With the development of highways, high-performance vehicles and high-performance tires, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10C08F2/38C08F2/40C08F4/48
Inventor 邰峰李传清吕万树胡保利
Owner CHINA PETROLEUM & CHEM CORP
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