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A kind of high cis-butadiene-isoprene block copolymer and preparation method thereof

A block copolymer and isoprene technology, applied in the field of high cis-butadiene-isoprene block copolymer and its preparation, can solve problems affecting the performance of final products

Active Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, although the butadiene-isoprene block copolymer can be obtained by stepwise feeding, usually, the obtained block copolymer is often mixed with the obtained butadiene or isoprene olefin homopolymers, the presence of these homopolymers will affect the properties of the final product
Since the properties of these homopolymers are not much different from those of block copolymers, it is currently difficult to separate them by means of extraction and other methods. The existing technology can only obtain a mixture of block copolymers and homopolymers

Method used

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  • A kind of high cis-butadiene-isoprene block copolymer and preparation method thereof
  • A kind of high cis-butadiene-isoprene block copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This example is used to illustrate the preparation method of the butadiene-isoprene block copolymer of the present invention.

[0070] (1) Prepare the catalyst. Under nitrogen protection, add 40 ml of hexane, 5 ml of 0.10 mol / L neodecanoic acid hexane solution, 2.1 ml of isoprene and 1.1 ml of 0.10 mol / L to a 200 ml glass bottle with a built-in magnetic stirring rotor. L of neodecanoic acid hexane solution, then placed in a cold water bath at 10°C, and started magnetic stirring. After 10 minutes, 26 ml of a 0.05 mol / L monochlorodiethylaluminum hexane solution was added, and 15 minutes later, 25 ml of a 0.2 mol / L triisobutylaluminum hexane solution was added. After 30 minutes, the water bath was adjusted to 20° C., and the aging was continued for 10 hours to obtain a homogeneous polymerization catalyst C1. The molar ratio of each component in the polymerization catalyst C1 is neodymium neodecanoate:triisobutylaluminum:diethylaluminum monochloride:isoprene:neodecanoic a...

Embodiment 2

[0075] This example is used to illustrate the preparation method of the butadiene-isoprene block copolymer of the present invention.

[0076] (1) Prepare the catalyst. Add 30ml of hexane, 5ml of 0.10mol / L neodecanoate hexane solution, 3.0ml of isoprene and 3.8ml of 0.10mol / L to a 200ml glass bottle with a built-in magnetic stirring rotor under nitrogen protection. hexane solution of neodecanoate, then placed in a cold water bath at 8°C, and started magnetic stirring. After 10 minutes, 32 ml of a 0.05 mol / L monochlorodiethylaluminum hexane solution was added, and after 13 minutes, 37 ml of a 0.2 mol / L triisobutylaluminum hexane solution was added. After 10 minutes, the water bath was adjusted to 30° C., and the aging was continued for 8 hours to obtain a homogeneous polymerization catalyst C2. The molar ratio of each component in the polymerization catalyst C2 is neodymium neodecanoate:triisobutylaluminum:diethylaluminum monochloride:isoprene:neodecanoic acid=1:14.8:3.2:60:0....

Embodiment 3

[0081] This example is used to illustrate the preparation method of the butadiene-isoprene block copolymer of the present invention.

[0082] (2) The first stage reaction. Add 172g of hexane and 6.79g of butadiene to a 500ml glass bottle under nitrogen protection, place them in a 60°C water bath after mixing, then add 11.3ml of polymerization catalyst C1 (the molar ratio of neodymium neodecanoate to butadiene is 4.5 ×10 -4 ). After reacting for 2.5 hours (the product of reaction temperature and reaction time is 150°C h), take out 21.68g of glue solution from the bottle, add 2ml of ethanol to terminate the reaction, and volatilize the solvent to obtain 0.79g of polybutadiene, according to the formula (2 ) to calculate the monomer conversion rate of the first stage to be 100%.

[0083] (3) The second stage reaction. Add 6.0 g of isoprene to the remaining glue in the bottle of step (2) (the molar ratio of neodymium neodecanoate in polymerization catalyst C1 to the total amoun...

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Abstract

The invention discloses a method for preparing a high cis-butadiene-isoprene block copolymer as well as the high cis-butadiene-isoprene block copolymer prepared with the method. The weight ratio of an isoprene structural unit and a butadiene structural unit is (0.11-11):1. According to the method, polymerization conditions of a first stage reaction and a second stage reaction are controlled, and the butadiene-isoprene block copolymer which doesn't contain butadiene and / or isoprene homopolymer can be prepared.

Description

technical field [0001] The invention relates to a high cis-butadiene-isoprene block copolymer and a preparation method thereof. Background technique [0002] The high-cis polybutadiene and polyisoprene obtained by the homopolymerization of butadiene and isoprene have their own characteristics: polybutadiene has high elasticity, low heat generation and Rolling resistance and excellent physical and mechanical properties such as wear resistance and low temperature resistance; polyisoprene is the rubber type closest to natural rubber in structure and performance, and has many characteristics similar to natural rubber, such as high tensile strength, Excellent elasticity, excellent wear resistance and low temperature flexibility, etc. The butadiene-isoprene copolymer is prepared by the method of copolymerization, which can combine the performance advantages of the above two homopolymers. [0003] However, when butadiene is copolymerized with isoprene, the most readily available ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F236/08C08F236/06C08F4/54C08F4/52
Inventor 赵姜维梁爱民欧阳素芳李传清张杰辛益双杨亮亮谭金枚孙伟苏肇庆
Owner CHINA PETROLEUM & CHEM CORP