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A kind of method for synthesizing solution-polymerized butadiene rubber

A technology for dissolving butyl pentamethylene rubber and butadiene, which is applied in the field of polymer synthesis, can solve the problems of cumbersome preparation process, complex catalytic system, and no large-scale products, and achieve simple production process, low production cost and high production cost. The effect of wear characteristics

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned catalytic system is complex and the preparation process is cumbersome
Therefore, no large-scale products have come out

Method used

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  • A kind of method for synthesizing solution-polymerized butadiene rubber

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Experimental program
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Effect test

Embodiment 1

[0054] Under nitrogen protection, add mixed solvent (cyclohexane and n-hexane, weight ratio is 88:12) 2500g, isoprene 75g, butadiene 136g successively in 5 liters of polymerization kettles, be warming up to 45 ℃, add normal 20 ml of butyllithium solution (the concentration of n-butyllithium is 0.1437 mol / L). After 15 minutes of the reaction, the peak temperature of 89°C was reached, and the reaction pressure at this time was 0.2 MPa. Then 164g of butadiene was slowly fed into the polymerization kettle, and the feeding speed was controlled so that the 164g of butadiene was added within 30 minutes, and then reacted for 15 minutes, and the conversion rate of raw material monomers was 100% by sampling and testing. Then, 11 ml (0.043 mol / L) of silicon tetrachloride solution was added into the reaction kettle to continue the reaction. After 10 minutes of reaction, 0.5 ml of isopropanol was added to terminate the reaction. After stirring for 15 minutes, 3.0 g of anti-aging agent 2,6...

Embodiment 2

[0057] Under nitrogen protection, add mixed solvent (cyclohexane and n-hexane, weight ratio is 85:15) 2500g, isoprene 67g, butadiene 122.4g successively to 5 liters of polymerization kettle, be warming up to 50 ℃, add 20 ml of n-butyllithium solution (the concentration of n-butyllithium is 0.1437 mol / L). After 15 minutes of reaction, the peak temperature of 90°C was reached, and the reaction pressure at this time was 0.2 MPa. Then 183.6g of butadiene was slowly fed into the polymerization kettle, and the feeding speed was controlled so that the 183.6g of butadiene was added within 25 minutes, and then reacted for 15 minutes, and the conversion rate of the raw material monomers was 100% by sampling and testing. . Then, 11 ml (0.043 mol / L) of silicon tetrachloride solution was added into the reaction kettle to continue the reaction. After 10 minutes of reaction, 0.5 ml of isopropanol was added to terminate the reaction. After stirring for 15 minutes, 3.0 g of an antioxidant 2,...

Embodiment 3

[0060] Under nitrogen protection, add mixed solvent (cyclohexane and n-hexane, the weight ratio is 90:10) 2500g, isoprene 56g, butadiene 105g successively to 5 liters of polymerization kettle, be warming up to 40 ℃, add normal 20 ml of butyllithium solution (the concentration of n-butyllithium is 0.1437 mol / L). After 15 minutes of reaction, the peak temperature of 92°C was reached, and the reaction pressure at this time was 0.2 MPa. Then 211g of butadiene was slowly fed into the polymerization kettle, and the feeding speed was controlled so that the 211g of butadiene was added within 35 minutes, and then reacted for 15 minutes, and the conversion rate of the raw material monomers was all reached 100% by sampling and testing. Then, 11 ml (0.043 mol / L) of silicon tetrachloride solution was added into the reaction kettle to continue the reaction. After 10 minutes of reaction, 0.5 ml of isopropanol was added to terminate the reaction. After stirring for 15 minutes, 3.0 g of an an...

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Abstract

The invention relates to the field of polymer synthesis, and discloses a method for synthesizing solution-polymerized butadiene rubber. The method comprises: (1) at an initiation temperature of (30-60) ° C The first material formed with a part of the butadiene monomer is contacted with the organolithium initiator to carry out the first batch polymerization reaction to obtain the second material; (2) when the temperature of the first batch polymerization reaction reaches the first temperature, The remaining butadiene monomer is added to the second material to carry out the second batch polymerization reaction, the first temperature is less than or equal to the peak temperature of the first batch polymerization reaction, and the first temperature is the same as the first batch polymerization reaction. The difference between the peak temperatures for a batch polymerization reaction is 0°C-3°C. The present invention can obtain the solution-polymerized butadiene rubber with high wear resistance without adding a regulator or carrying out a polymerization reaction at a high temperature.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a method for synthesizing solution-polymerized butadiene rubber. Background technique [0002] With the continuous development of expressways, increasing the speed of automobiles and reducing the energy consumption of automobiles have become the development goals of the automobile industry. [0003] It is particularly important to reduce the rolling resistance of tires and improve the traction performance on wet and dry roads. The development and application of new synthetic rubbers are of great significance to the development of high-performance tires. [0004] Butadiene rubber is a copolymerization product of butadiene and isoprene, and it is a synthetic rubber that has not yet been industrialized in my country. [0005] Butadiene rubber not only has excellent low temperature resistance, fatigue resistance and tear resistance, but also has good dynamic mechanical properties, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/06C08F236/08C08F2/00C08K5/13
CPCC08F236/06C08K5/13C08F2400/02C08F236/08C08F2/00Y02T10/86
Inventor 徐炜王雪徐林呼振鹏王世朝王妮妮周微频
Owner CHINA PETROLEUM & CHEM CORP