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A kind of trans-1,4-structure butadiene-isoprene copolymer rubber and its preparation method

A technology of isoprene and butadiene, applied in the field of trans-1, can solve the problems of low catalytic efficiency, low trans content and the like

Active Publication Date: 2016-04-06
QINGDAO UNIV OF SCI & TECH +1
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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 all have problems such as low catalytic efficiency or low trans content

Method used

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  • A kind of trans-1,4-structure butadiene-isoprene copolymer rubber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Add 1500mL isoprene monomer successively to a 5L reaction device, add 200ml butadiene, 15mmol triisobutylaluminum and 0.43g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl4 ; The mass content of titanium is 2.0%), the copolymerization temperature is 30° C., and the copolymerization time is 20 hours. Terminate the reaction with 500 ml of 1 wt% acidified ethanol, remove unreacted monomers, and dry to obtain 286 grams of rubber material. The characteristics are shown in Table 1. The trans-1,4-butadiene-isoprene copolymer rubber can be used in tire products, or in shock-absorbing materials and the like.

Embodiment 2

[0022] Operation is the same as in Example 1, except that the copolymerization time is 60 hours. The results are shown in Table 1.

Embodiment 3

[0024] Add 1500mL isoprene monomer, 500ml butadiene, 17mmol triisobutylaluminum and 0.8g heterogeneous Ziegler-Natta catalyst (wherein the titanium compound is selected from TiCl 4 ; The mass content of titanium is 3.0%), the polymerization temperature is 70° C., and the copolymerization time is 10 hours. Terminate the reaction with 400 ml of 1 wt% acidified ethanol, remove unreacted monomers, and dry to obtain 350 g of trans-1,4-butylene copolymer rubber material. The characteristics are shown in Table 1. The trans-1,4-butadiene-isoprene copolymer rubber can be used in tire products, or in shock-absorbing materials and the like.

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Abstract

A trans-1, 4-structured butadiene-isoprene copolymer rubber and a preparation method thereof. A Ziegler-Natta catalytic system containing MgCl2 loaded titanium and an organic aluminium compound is used to catalyze butadiene and isoprene for copolymerization synthesis of the butadiene-isoprene copolymer with trans 1, 4-structure greater than 90%; and the copolymer rubber comprises, by molar fraction, 20-99.5% of an isoprene unit and 0.5-80% of a butadiene unit. One preparation method of the trans copolymer rubber is by maintaining a feeding ratio of butadiene to isoprene, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with gradient composition at 0-90 DEG C. A second preparation method of the trans copolymer rubber is by maintaining the concentration of butadiene in reaction materials, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with relatively uniform composition at 0-90 DEG C. The trans copolymer rubber has characteristics of low heat, good abrasion resistance and excellent flex and fatigue resistant performance, and is suitable rubber products for dynamic usage.

Description

technical field [0001] The invention belongs to the field of synthetic rubber materials, in particular to a preparation method of trans-1,4-structure polydiene copolymerized rubber and the trans-1,4-structured polydiene copolymerized rubber prepared by the method. Background technique [0002] Diene polymers with trans-1,4-structure can be applied to high-performance tire compounds due to their excellent flex fatigue resistance, low rolling resistance, low compression heat generation and wear. Compared with cis-1,4-structured polymers, trans-1,4-structured polydienes, such as trans-1,4-polyisoprene (TPI), are crystalline plastics at room temperature and require By using a high number of sulfur (4-6 parts) or blending and vulcanizing with other rubbers to prepare elastomeric materials (ZL95110352.0, ZL200610043556.4, Synthetic Rubber Industry, 2001, 24 (1) 25-28, synthetic Rubber Industry 2001, 24(2) 82-86, Rubber Industry 2002, 49(3) 133-137). [0003] Copolymerization of ...

Claims

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Application Information

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