A kind of low molecular weight trans-1,4-polydiene copolymer and its preparation method and application

A low molecular weight, polydiene technology, used in transportation and packaging, tire parts, vehicle components, etc., to solve problems such as no-commodity production and application reports

Active Publication Date: 2017-07-25
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no commercial production and application report of low molecular weight trans-1,4-polydiene copolymer

Method used

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  • A kind of low molecular weight trans-1,4-polydiene copolymer and its preparation method and application
  • A kind of low molecular weight trans-1,4-polydiene copolymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 4Kg isoprene monomer, 0.229Kg butadiene monomer, 125mmol triisobutylaluminum, 4.5g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl 4 The mass content of titanium is 2.0%), polymerization temperature is 30 ℃, and hydrogen pressure is 1.2Mpa, and polymerization time is 48h, terminates reaction with ethanol 500ml, removes unreacted monomer, and drying has obtained 1Kg low molecular weight trans-butanedi Alkene-polydiene copolymers. The physical properties of the low molecular weight trans-butadiene-isoprene copolymer are shown in Table 1.

Embodiment 2

[0030] Operation is the same as in Example 1, except that the addition of butadiene is 0.097Kg. The results are shown in Table 1.

Embodiment 3

[0032] Add 4Kg isoprene monomer, 0.142Kg butadiene monomer, 60mmol triisobutylaluminum, 4g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl4; The mass content of titanium is 2.0%), the polymerization temperature is 60 ℃, the hydrogen pressure is 1.4Mpa, the polymerization time is 48h, terminates the reaction with ethanol 500ml, removes unreacted monomer, and drying obtains 1.4Kg low molecular weight trans-butanediol Alkene-polydiene copolymers. The physical properties of the low molecular weight trans-butadiene-isoprene copolymer are shown in Table 1.

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Abstract

The invention discloses a trans-1,4-polydiene copolymer having a low molecular weight, and a preparation method and a use thereof. The weight average molecular weight of the copolymer is 2000-150000, the content of the trans-1,4-structure is greater than 90%, and the copolymer is composed of 0.1-99.9mol% of a butadiene unit and 0.1-99.9mol% of an isoprene unit. The trans-1,4-polydiene copolymer having a low molecular weight is prepared through solution copolymerization or body copolymerization by adopting a Ziegler-Natta catalytic system composed of MgCl2 supported titanium and an organic aluminum compound and adopting hydrogen as a molecular weight adjusting agent. The relative molecular weight of the copolymer having a low molecular weight is controlled by adjusting the pressure of hydrogen, and the copolymerization composition and the sequence distribution of the copolymer having a low molecular weight are controlled by adjusting the kinds, proportions and copolymerization conditions of copolymerization monomers. The trans-structured copolymer having a low molecular weight can improve the processability of a rubber compound, improve the wear resistances and the fatigue crack increase resistance of rubber products and reduces the rolling resistances and the heat generation of the products, and can be used in dynamic use rubber products used for tires, damping materials and the like as green operation oil.

Description

technical field [0001] The invention belongs to the field of synthesis and application of polydiene rubber, in particular to a synthesis method of low molecular weight trans-1,4-polydiene copolymer and a low molecular weight trans 1,4-structured polydiene copolymer prepared by the method. Olefin copolymers and uses thereof. Background technique [0002] Relatively low molecular weight cis-1,4-polybutadiene and polyisoprene have been patented and commercialized. For example, Chinese patent (publication number CN101608003, authorized publication number CN101492514B) has reported the method for preparing medium and low molecular weight liquid polyisoprene rubber using a rare earth catalyst, and the cis-1,4 The structure content is >89%, the weight average molecular weight is 5000-120000, and the molecular weight distribution index is 1.1-6. Chinese patents (publication number CN1266857, publication number CN101812151A) report the synthesis of cis-1,4-polybutadiene with low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/08C08F236/06C08F4/645C08F2/06C08F2/02C08L7/00C08L9/00B60C1/00
Inventor 贺爱华王日国姚薇刘晨光邵华锋
Owner QINGDAO UNIV OF SCI & TECH
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