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Synthetic star-line blended solution-polymerized styrene-butadiene rubber and preparation method thereof

A solution-polymerized styrene-butadiene rubber and blending technology, which is applied in the field of polymer synthesis, can solve problems such as difficult promotion and easy deactivation

Active Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this multifunctional organoalkali metal initiator is easy to deactivate and is difficult to popularize in practical applications.

Method used

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  • Synthetic star-line blended solution-polymerized styrene-butadiene rubber and preparation method thereof
  • Synthetic star-line blended solution-polymerized styrene-butadiene rubber and preparation method thereof
  • Synthetic star-line blended solution-polymerized styrene-butadiene rubber and preparation method thereof

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specific Embodiment approach

[0041] According to another preferred embodiment, the method further includes: performing a termination reaction on the reaction system obtained after step (2). The present invention is not particularly limited to the specific operation of the termination reaction, and various conventional methods in the art can be used to perform the termination reaction, for example, it can be terminated by introducing an appropriate amount of isopropanol into the system.

[0042] Preferably, the anti-aging agent is selected from at least one of the anti-aging agent 1520, the anti-aging agent 1076, the anti-aging agent 1010 and the anti-aging agent 264.

[0043] According to the present invention, the dosage of the anti-aging agent can be the conventional dosage in this field. For example, based on the weight of the solution-polymerized styrene-butadiene rubber, the amount of the anti-aging agent may be 0.005-2 wt%, preferably 0.1-0.5 wt%.

[0044] According to the present invention, after ...

Embodiment 1

[0058] Under nitrogen protection, add mixed solvent (cyclohexane and normal hexane, weight ratio is 88:12) 2500g, styrene 93g, 1ml ethyl tetrahydrofurfuryl ether, butadiene 280g, The temperature of the system was raised to 45° C., and 20 ml of n-butyl lithium solution was added (the concentration of n-butyl lithium was 0.1437 mol / L). The reaction reached a peak temperature of 98° C. in 8 minutes, and the reaction pressure was 0.35 MPa. After reaching the peak temperature for 5 minutes, the conversion rate reached 100% by sampling and the reaction pressure was 0.25 MPa. After reacting for 15 minutes, add silicon tetrachloride solution 2ml (0.043mol / L) and epichlorohydrin solution in the reactor 10ml (0.072mol / L) to continue the reaction, after 10 minutes of reaction, add 0.5ml isopropanol to terminate. After stirring for 15 minutes, 3.0 g of antioxidant 264 was added.

[0059] After the glue is condensed by water vapor, it is dried by an open mill to obtain a polymerized prod...

Embodiment 2

[0062] Under nitrogen protection, add mixed solvent (cyclohexane and normal hexane, weight ratio is 85:15) 2500g, styrene 73g, 1ml ethyl tetrahydrofurfuryl ether, butadiene 300g, The temperature of the system was raised to 50° C., and 20 ml of n-butyl lithium solution was added (the concentration of n-butyl lithium was 0.1437 mol / L). The reaction reached a peak temperature of 98° C. in 7 minutes, and the reaction pressure was 0.35 MPa. After reaching the peak temperature for 5 minutes, the conversion rate reached 100% by sampling and the reaction pressure was 0.25MPa. After another 15 minutes of reaction, 3.4ml (0.043mol / L) of silicon tetrachloride solution and epichlorohydrin were added in the reactor. Solution 8ml (0.072mol / L) continued to react, and after 10 minutes of reaction, 0.5ml of isopropanol was added to terminate. After stirring for 15 minutes, 3.0 g of antioxidant 264 was added.

[0063] After the glue is condensed by water vapor, it is dried by an open mill to ...

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Abstract

The invention relates to the field of polymer synthesis, and discloses a method for synthesizing star-line blended solution-polymerized styrene-butadiene rubber. The method comprises the following steps: (1) in the presence of an inert solvent and an organic lithium initiator, carrying out polymerization reaction on a styrene monomer and a butadiene monomer until the conversion rate of the butadiene monomer and the conversion rate of the styrene monomer both reach 95% or above; and (2) contacting the reaction system obtained in the step (1) with an additive containing a coupling agent, whereinthe additive optionally contains an anti-aging agent, the coupling agent is a mixed coupling agent containing a star-shaped coupling agent and a linear coupling agent, and in the mixed coupling agent, the content molar ratio of the star-shaped coupling agent to the linear coupling agent is 1:(1.2-20). According to the method, the solution-polymerized styrene-butadiene rubber with three-peak molecular weight distribution can be obtained, so that the processability of the solution polymerized styrene-butadiene rubber is improved.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a method for synthesizing star-line blended solution-polymerized styrene-butadiene rubber and the solution-polymerized styrene-butadiene rubber prepared by the method. Background technique [0002] Tire products have developed from bias tires to radial tires, and then to high-performance radial tires and green radial tires. There are also higher and higher requirements for performance, which require low rolling resistance for energy saving and high requirements. Excellent anti-wet skid performance to ensure vehicle safety, but also requires good wear resistance and other comprehensive properties. [0003] According to the specific performance requirements of synthetic rubber for tires, the most commonly used method is to couple tires. The coupling agent generally used is a halide containing tin or silicon atoms. The GPC of star polymers synthesized by these methods The spectrum ...

Claims

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Application Information

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IPC IPC(8): C08C19/25C08F236/10C08F212/08C08J3/24
CPCC08C19/25C08F236/10C08J3/24C08J2309/06C08F212/08Y02T10/86
Inventor 徐炜王雪王世朝王妮妮吕万树康新贺鲁文平
Owner CHINA PETROLEUM & CHEM CORP
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