Solution polymerized butadiene-styrene random copolymer, preparation method thereof, and applications of composite conditioning agent

A technology of random copolymer and styrene, applied in the field of polymers, can solve the problems of affecting product performance, unsuitable vinyl products, difficult to control distribution, etc., to reduce the frequency of maintenance and cleaning, difficult to gel, and improve production efficiency. Effect

Inactive Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This regulator has a strong regulating ability and is suitable for the synthesis of products with high vinyl content, but it is not suitable for the synthesis of medium and low vinyl product

Method used

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  • Solution polymerized butadiene-styrene random copolymer, preparation method thereof, and applications of composite conditioning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The polymerization kettle was deoxidized by nitrogen replacement, 3000mL cyclohexane was metered and then injected into the polymerization kettle with nitrogen pressure, then 4.08g ethyl tetrahydrofurfuryl ether and 3.5g tetramethylethylenediamine were added, and 0.6mL (concentration 0.4mol / L) Butyllithium breaks impurities. After the temperature is raised to 50°C, 75g of styrene and 225g of butadiene are mixed uniformly in a premix tank, and 2mmol of initiator butyllithium (concentration 0.04mol / L) is prepared, and then mixed The monomer and the initiator are continuously added to the polymerization kettle at the same time, and the feeding time is 30 minutes. 0.5% antioxidant, condensed with water vapor, and dried to obtain a polymer. Using gel permeation chromatography (GPC), the molecular weight of the product was measured to be 142,060 g / mol, the molecular weight distribution was 1.31, and the Mooney viscosity was 35.2. The vinyl content by HNMR was 35.8%. The gel...

Embodiment 2

[0027] According to the mode of embodiment 1, just change the consumption of adjustment, 19.08g ethyl tetrahydrofurfuryl ether and 3.5g tetramethylethylenediamine, the product records vinyl content by HNMR and is 68.1%.

Embodiment 3

[0029] According to the method of Example 1, only the type of adjustment is changed, 4.08g of ethyl tetrahydrofurfuryl ether is 4.08g of isopropyl tetrahydrofurfuryl ether and 3.5g of tetramethylethylenediamine is N,N-dimethyl Tetrahydrofurfurylamine, the product records vinyl content by HNMR and is 38.1%.

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Abstract

The invention discloses a solution polymerized butadiene-styrene random copolymer, a preparation method thereof, and applications of a composite conditioning agent. The preparation method comprises following steps: under the protection of nitrogen, alkyl tetrahydrofurfuryl ether and an amine compound are taken as the composite conditioning agent, a premixed polymer monomer of butadiene and styrene and initiator butyl lithium are delivered into a reaction kettle uniformly continuously at the same time for random copolymerization reaction; after polymerization reaction, a coupling agent is added for coupling; after coupling reaction, an antioxidant is added, an obtained product is subjected to water vapor condensation, and is dried so as to obtain the solution polymerized butadiene-styrene random copolymer. The preparation method is simple, and is capable of inhibiting generation of gel in the polymerization kettle; maintenance and cleaning frequency is reduced; production efficiency is increased; and the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a solution-polymerized butadiene-styrene random copolymer, a preparation method thereof and an application of a compound regulator, belonging to the field of macromolecules. technical background [0002] Solution-polymerized styrene-butadiene rubber (SSBR) is based on butadiene-styrene as the polymer monomer, organic lithium compound as the initiator, and polar organic compounds as the regulator of the microstructure of the polymerization chain. A random copolymer obtained by solution polymerization. Compared with ESBR, SSBR has 20-30% lower rolling resistance, 3% and 10% improvement in wet grip and wear resistance, respectively, and is the main type of rubber used in high-performance tire treads. SSBR is a general-purpose rubber with comprehensive properties between ESBR and butadiene rubber (BR). In actual use, compared with ESBR, it has the advantages of wear resistance, flex resistance, low temperature resistance, low hea...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F2/38C08F4/48C08F8/42C08F8/00
Inventor 陈移姣杨虎龙李望明周燎原宋丽莉姚琼
Owner CHINA PETROLEUM & CHEM CORP
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