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Trans-1,4-polydialkene composite rubber and preparation methods thereof

A technology for compounding rubber and polydiene, applied in the field of trans 1, can solve the problems of low trans content and low catalytic efficiency, and achieve the effect of unique performance

Active Publication Date: 2011-05-11
SHANDONG HUAJU POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-based, vanadium-based, cadmium-based and lithium-based catalytic systems have problems such as low catalytic efficiency or low trans content

Method used

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  • Trans-1,4-polydialkene composite rubber and preparation methods thereof
  • Trans-1,4-polydialkene composite rubber and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1500mL isoprene monomer, 15mmol triisobutylaluminum, 1000mL n-heptane and 0.43g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl 4 ; The mass content of titanium is 2.0%), the polymerization temperature is 30°C, and the homopolymerization time is 24h to obtain an isoprene homopolymer; 500ml of butadiene is added, the copolymerization temperature is 40°C, and the copolymerization time is 12 hours. Terminate the reaction with 500 ml of 1 wt% acidified ethanol, remove unreacted monomers, and dry to obtain 880 grams of polydiene composite rubber material. The properties of trans-1,4-polydiene composite rubber are shown in Table 1. The trans-1,4-polydiene composite rubber has good dynamic performance, and can be applied to tire tread or sidewall compound, or applied to shock-absorbing materials and the like.

Embodiment 2

[0028] The operation is the same as in Example 1, except that the homopolymerization time of isoprene is 50 h. The results are shown in Table 1.

Embodiment 3

[0030] 1500mL isoprene monomer, 17mmol triisobutylaluminum and 0.43g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl 4 ; The mass content of titanium is 2.0%), the polymerization temperature is 15°C, and the homopolymerization time is 70h to obtain an isoprene homopolymer; 500ml of butadiene is added, the copolymerization temperature is 40°C, and the copolymerization time is 20 hours. Terminate the reaction with 400ml of 1wt% acidified ethanol, remove unreacted monomers, and dry to obtain a trans-1,4-polydiene composite rubber material composed of isoprene homopolymer and isoprene copolymer .

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Abstract

The invention relates to a polydialkene composite rubber of trans-1,4- structure and preparation methods thereof. The composite rubber consists of 10 to 80 mass percent of trans-1,4-polyisoprene and 20 to 90 mass percent of trans-1,4-butadiene-isoprene copolymer, wherein over 90 percent of structural units of all dialkenes in the composite rubber have trans-1,4-structures. The first preparation method comprises the following steps of: homopolymerizing isoprene to obtain trans-1,4-polyisoprene by adopting a Ziegler-Natta catalysis system consisting of MgCl2 supported titanium and organic aluminum compound, and then adding butadiene to synthesize the trans-butadiene-isoprene copolymer. The second preparation method comprises the following steps of: adding mixed monomers of butadiene and isoprene into a polymerization device at the same time, performing copolymerization to obtain the butadiene-isoprene copolymer of the trans-1,4-structure, and continuously polymerizing the isoprene to obtain the trans-1,4-polyisoprene after the butadiene with high polymerization speed is completely consumed. The used polymerization device is a stirring reaction kettle or a screw extruder. The composite rubber has excellent performance such as low rolling resistance, low generated heat, abrasion resistance, particularly fatigue break increment resistance and the like, and is suitable for dynamically used rubber products such as tyres, vibration absorption materials and the like.

Description

technical field [0001] The invention belongs to the field of polydiene rubber materials, in particular to a method for preparing composite rubber composed of trans-1,4-polyisoprene and trans-1,4-butadiene-isoprene copolymer and The trans 1,4-structured polydiene compound rubber prepared by the method. Background technique [0002] With the increasing awareness of public safety and environmental protection, people's demand for high-performance tire compounds for automobiles is becoming more and more urgent. As a new type of rubber material, trans-1,4-structured diene polymer is famous for its excellent dynamic mechanical properties (including excellent flex resistance, low rolling resistance, low compression heat generation and wear). The application of high-performance tire compounds has gradually attracted people's attention. Compared with polymers with cis-1,4-structure, polymer materials with trans-1,4-configuration have more excellent dynamic properties. Trans-1,4-str...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08F136/08C08F236/06C08F236/08C08F4/645
Inventor 黄宝琛贺爱华姚薇邵华锋
Owner SHANDONG HUAJU POLYMER MATERIALS CO LTD
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