Conjugated diene/monovinyl aromatic hydrocarbon copolymer and continuous polymerization production method thereof as well as and oil-extended rubber and preparation method thereof

A monovinyl aromatic hydrocarbon and conjugated diene technology, which is applied in the production of conjugated diene/monovinyl aromatic hydrocarbon copolymer and its continuous polymerization, and the fields of oil-extended rubber and preparation thereof, can solve the problem of narrow molecular weight distribution and processing performance. Poor and other problems

Active Publication Date: 2013-10-30
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 shortcomings of narrow molecular weight distribution and poor processability in 1,3-conjugated diene/monovinylarene copolymers in the pri

Method used

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  • Conjugated diene/monovinyl aromatic hydrocarbon copolymer and continuous polymerization production method thereof as well as and oil-extended rubber and preparation method thereof
  • Conjugated diene/monovinyl aromatic hydrocarbon copolymer and continuous polymerization production method thereof as well as and oil-extended rubber and preparation method thereof
  • Conjugated diene/monovinyl aromatic hydrocarbon copolymer and continuous polymerization production method thereof as well as and oil-extended rubber and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0036] According to the preparation method of the oil-extended rubber of the present invention, the method comprises mixing and contacting the copolymer with the extender oil, wherein, based on the total amount of the oil-extended rubber, the amount of the copolymer used is 66-80% by weight, so The amount of the extender oil is 20-34% by weight, wherein the copolymer is the 1,3-conjugated diene / monovinylarene copolymer prepared by the method of the present invention.

[0037] According to the preparation method of the oil-extended rubber of the present invention, the present invention has no special requirements on the conditions for mixing and contacting the copolymer and the extending oil. The copolymer solution after polymerization of the present invention can be mixed with the extender oil in a continuous contact manner, or the copolymer solution can be mixed with the extender oil in a discontinuous contact manner. Preferably, the copolymer solution after polymerization of...

Embodiment 1

[0049] 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 tank is controlled at 0.7MPa (gauge pressure), and a mixed solvent of 700g of cyclohexane and n-hexane (cyclohexane and n-hexane, the weight ratio is 88:12) is added to the first tank. , after heating up to 100°C through the jacket, continuously add 35°C mixed solvent of cyclohexane and n-hexane (hexanaphthene and n-hexane, weight ratio is 88:12) and monomers to the first kettle, various reactions The feed rate of raw materials is: cyclohexane and n-hexane (hexanaphthene and n-hexane, weight ratio is 88: 12) 3538g / h, 1,3-butadiene 669g / h, styrene 329g / h, ethyl 2.268g / h of tetrahydrofurfuryl ether, 0.2201g / h of n-butyllithium and 0.1996g / h of 1,2-butadiene. The reaction pressure of each polymerization tank is 0.6-0.80Mpa...

Embodiment 2

[0051] Using the same experimental conditions as in Example 1, the only difference is that the feed rate of 1,2-butadiene is 0.1497 g / h. The data of styrene-butadiene copolymer and oil-extended rubber are shown in Table 1 and Table 2.

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Abstract

The invention relates to a 1,3-conjugated diene/monovinyl aromatic hydrocarbon copolymer and a continuous polymerization production method thereof. The method comprises the following steps of: continuously feeding reaction materials containing monomers a, an organic solvent, 1,2-butadiene, alkyl tetrahydrofurfuryl ether and organic lithium into a reaction kettle, and polymerizing the monomers a for 30-270 minutes under the conditions of a reaction temperature in the range from 130 to 150 DEG C and reaction pressure in the range from 0.5 to 0.9 MPa, thereby obtaining the copolymer, wherein the monomers a refer to monovinyl aromatic hydrocarbon and conjugated diene, and on the basis of the weight of the monomers a, the dosage of the 1,2-butadiene is 75-225 ppm. The copolymer obtained by the method provided by the invention has high vinyl content, high molecular weight distribution and high Mooney viscosity, and rational gel content. The invention also relates to oil-extended rubber and a preparation method thereof. The oil-extended rubber provided by the invention is suitable for subsequent processing.

Description

technical field [0001] The present invention relates to a conjugated diene / monovinylarene copolymer and its continuous polymerization production method, oil-extended rubber and its preparation 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-perfo...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F2/38C08F2/40C08F4/48C08L9/06
Inventor 邰峰李传清吕万树胡保利
Owner CHINA PETROLEUM & CHEM CORP
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