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Terminal-modified solution-polymerized butylbenzene copolymer and preparation method and application thereof

A solution-polymerized styrene-butadiene and end-group modification technology, applied in the direction of rolling resistance optimization, road transportation emission reduction, etc., can solve the problems of the production line not running normally and continuously, reducing the rolling hysteresis of tires, and the surface of the rubber compound being not smooth, etc. Achieving good dynamic mechanical properties, speeding up the "powder eating" performance, and the effects of easy control of the reaction

Active Publication Date: 2014-09-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of the prior art that the mixing effect of solution-polymerized styrene-butadiene rubber and white carbon black is not good, the production efficiency is low, the surface of the mixed rubber is not smooth, there are cracks, and even the end is broken, which causes the production line to fail to run normally and continuously. The purpose is to provide a solution-polymerized styrene-butadiene copolymer with polar carboxyl groups and amine groups at both ends of the molecular chain. This polymer is used for tire tread rubber, and has a good bonding effect with white carbon black, and enhances the strength and wear resistance of vulcanized rubber. Durability, shear resistance, reduced hysteresis, reduced heat build-up and drag when the tire is rolling

Method used

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  • Terminal-modified solution-polymerized butylbenzene copolymer and preparation method and application thereof
  • Terminal-modified solution-polymerized butylbenzene copolymer and preparation method and application thereof
  • Terminal-modified solution-polymerized butylbenzene copolymer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Under the protection of nitrogen in a clean and dry 150mL two-hole horn bottle, add 2.5g of dimethylamine to the other hole of the horn bottle with a syringe at a room temperature of 10°C, and then add 112.2mL of 0.5mol / L n-butyllithium , After shaking for 20 minutes, the reaction was complete, and the concentration of lithium dimethylamide was 0.48mol / L at this time.

Embodiment 2

[0064] Under the protection of nitrogen in a clean and dry 150mL two-hole horn bottle, add 5.1g of diisopropylamine to the other hole of the horn bottle with a syringe at room temperature 32°C, and then add 0.5mol / L n-butyllithium 103mL, the reaction was complete after shaking for 25min, and the concentration of lithium diisopropylamide was 0.47mol / L at this time.

Embodiment 3

[0066] Under the protection of nitrogen in a clean and dry 150mL two-hole horn bottle, add 8.05g of bis-(trimethylsilyl)amine to the other hole of the horn bottle with a syringe at a room temperature of 40°C, and then add 0.5mol / L 105mL of n-butyllithium was used, and the reaction was complete after shaking for 30 minutes. At this time, the concentration of bis-(trimethylsilyl)amide lithium was 0.44mol / L.

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Abstract

The invention discloses a terminal-modified solution-polymerized butylbenzene copolymer and a preparation method and application thereof; terminals of the terminal-modified solution-polymerized butylbenzene copolymer comprise amino group and carboxy group; the preparation method is as follows: reacting a secondary amine with butyl lithium to prepare an active amino lithium compound; adding the prepared active amino lithium compound and a polymerization monomer into a reaction kettle filled with a solvent for initiation of polymerization reaction; after the polymerization reaction is completed, adding an anhydride for end capping reaction, after the end capping reaction is completed, adding a dilute acid solution for acidification to obtain the terminal-modified solution-polymerized butylbenzene copolymer. The active amino lithium compound prepared by reaction of the secondary amine and the butyl lithium can be used as an initiation agent with the structure regulation function in preparation of high branched butylbenzene copolymer containing terminal amino group; the preparation method has the advantages of simple operation and mild condition; the prepared polymer can be used in tire tread glue, is good in white carbon black bonding effect, can enhance strength, wear resistance and shear resistance of vulcanized rubber, reduces tire rolling hysteresis quality, reduces heat generation and resistance, and can be widely used in tire tread glue materials.

Description

technical field [0001] The invention relates to a terminal-modified solution-polymerized styrene-butadiene copolymer, a preparation method thereof and the application of secondary amine compounds; it belongs to the field of modification of modified styrene-butadiene rubber. Background technique [0002] Styrene and conjugated diene can be directionally polymerized into random or block copolymers in a solvent under the initiation of butyllithium. This material is especially suitable for thermoplastic elastomers or used in the manufacture of tires. However, the mixing effect of the prepared solution-polymerized styrene-butadiene rubber and white carbon black is not good, the production efficiency is low, the surface of the mixed rubber is not smooth, there are cracks, and even the end is broken, resulting in the normal and continuous operation of the production line. [0003] The commonly used butyllithium-initiated linear styrene and conjugated diene polymers have a non-polar...

Claims

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Application Information

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IPC IPC(8): C08F279/04C08F236/10C08F8/46C08F8/32C08F8/00C08F4/48C08L13/00C08K3/36
CPCY02T10/86
Inventor 张建国梁红文李望明
Owner CHINA PETROLEUM & CHEM CORP
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