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Butadiene-isoprene co-polymer rubber and preparation method thereof

A technology of isoprene and butadiene, which is applied in the field of butadiene-isoprene copolymer rubber and its preparation, can solve the problems of difficult to use at low temperature, loss of elasticity, poor elasticity, etc.

Active Publication Date: 2014-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the glass transition temperature of general-purpose butadiene rubber (polybutadiene) is as low as -106°C, but it completely loses its elasticity at -60°C, and its vulcanized rubber has a tensile and cold resistance coefficient of almost 0, so it is difficult to use in low temperature occasions
The glass transition temperature of natural rubber is -65°C, and the tensile and cold resistance coefficient of vulcanized rubber at -60°C is 0.25, and the elasticity is also poor

Method used

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  • Butadiene-isoprene co-polymer rubber and preparation method thereof
  • Butadiene-isoprene co-polymer rubber and preparation method thereof
  • Butadiene-isoprene co-polymer rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This example is used to illustrate the preparation method of the butadiene-isoprene copolymer rubber of the present invention.

[0072] (1) Catalyst preparation. Under the protection of nitrogen, add 4000ml hexane, 50ml concentration of 0.50mol / L neodymium neodecanoate solution, 56g butadiene and 1g neodecanoic acid to the dry aging kettle; then add 150ml concentration of 0.5mol / L Chlorodiethylaluminum solution, aged at 10°C for 15 minutes; then added 270ml of triisobutylaluminum solution with a concentration of 1.14mol / L, and continued to age at 10°C for 30h to obtain a homogeneous catalyst C1 . The molar ratio of each component in C1 is neodymium neodecanoate: triisobutylaluminum: diethylaluminum monochloride: butadiene: neodecanoic acid=1:12.3:3.0:41:0.23.

[0073] (2) Butadiene-isoprene copolymerization. Under the protection of nitrogen, add 2000g hexane, 125g butadiene, 125g isoprene and 85ml catalyst C1 to the polymerization kettle at 20°C, in which neodecanoat...

Embodiment 2

[0076] This example is used to illustrate the preparation method of the butadiene-isoprene copolymer rubber of the present invention.

[0077](1) Catalyst preparation. Under the protection of nitrogen, add 3500ml hexane, 100ml concentration of 0.23mol / L neodymium neodecanoate solution, 90g isoprene and 3g neodecanoic acid to the dry aging kettle and mix; then add 160ml concentration of 0.5mol / L L of diethylaluminum chloride solution, aged at 5°C for 13 minutes; then added 600ml of triisobutylaluminum solution with a concentration of 0.75mol / L, and continued to age at 5°C for 48h to obtain a homogeneous catalyst C2. The molar ratio of each component in C2 is neodymium neodecanoate: triisobutylaluminum: diethylaluminum monochloride: isoprene: neodecanoic acid=1:19.6:3.5:58:0.76.

[0078] (2) Butadiene-isoprene copolymerization. Under nitrogen protection, 2000g hexane, 200g butadiene, 50g isoprene and 120ml catalyst C2 were sequentially added to the polymerization kettle at -1...

Embodiment 3

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

[0082] (1) Catalyst preparation. Add 4000ml of hexane, 50ml of concentration of 0.50mol / L neodymium neodecanoate solution, 70g of butadiene and 1.8g of neodecanoic acid to the dry aging kettle under nitrogen protection; then add 150ml of concentration of 0.5mol / L L of diethylaluminum chloride solution, aged at 10°C for 15 minutes; then added 270ml of triisobutylaluminum solution with a concentration of 1.14mol / L, and aged at 10°C for 30h to obtain a homogeneous catalyst C3. The molar ratio of each component in C3 is neodecanoic acid neodymium: triisobutylaluminum: diethylaluminum monochloride: butadiene: neodecanoic acid = 1: 12.3: 3.0: 52: 0.42.

[0083] (2) Butadiene-isoprene copolymerization. Under the protection of nitrogen, add 2000g hexane, 200g butadiene, 55g isoprene and 100ml catalyst C3 to the polymerization kettle at 20°C, in whi...

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Abstract

The invention provides a butadiene-isoprene co-polymer rubber which contains butadiene structure units and isoprene structure units, wherein a molar ratio of the butadiene structure units to the isoprene structure units is 0.06-4:1. Content of cis-1,4 structures is not less than 98% by more in the butadiene structure units. The content of cis-1,4 structures is not less than 98% by more and the content of trans-1,4 structures is 0% by more in the isoprene structure units. All the isoprene structure units are bonded in a head-tail manner. The invention also provided a preparation method of the butadiene-isoprene co-polymer rubber and the butadiene-isoprene co-polymer rubber prepared through the preparation method. The butadiene-isoprene co-polymer rubber is high in regularity so that the co-polymer rubber has a more excellent low-temperature performance.

Description

technical field [0001] The invention relates to a butadiene-isoprene copolymer rubber and a preparation method thereof. Background technique [0002] Natural rubber is the rubber with the best comprehensive performance among all rubbers, which is largely due to its extremely high regularity. In addition to a small amount of small molecules such as proteins and phospholipids in natural rubber, the vast majority (generally accounting for 92-95%) is polyisoprene. The polyisoprene macromolecular chain in natural rubber has a very high degree of regularity, which is mainly reflected in: (1) the structural units are all cis-1,4-structures, and do not contain trans-type 1,4-structures, 3,4- -structure or 1,2-structure; (2) All structural units are bonded head-to-tail, and there is no head-to-head or tail-to-tail bond. Since the polyisoprene macromolecular chains in natural rubber have a high degree of regularity, the macromolecular chains are oriented along the stress direction t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/06C08F236/08C08F4/52
Inventor 欧阳素芳张杰赵姜维李传清谭金枚孙伟杨亮亮辛益双
Owner CHINA PETROLEUM & CHEM CORP
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