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High molecular weight polyisoprene rubber and preparation method thereof

A polyisoprene and rubber technology, applied in the field of iron-based post-transition metal catalyst compositions, can solve the problems of limited application and low molecular weight of polyisoprene, and achieve good wet skid resistance and low heat generation Effect

Active Publication Date: 2013-09-11
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular weight of polyisoprene synthesized by the above research is not high (≤50000), which greatly limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 5.2 mg of ferric chloride complex (C1), 1000 mL of isoprene monomer, 124 mg of triphenyl phosphate, 1000 mL of toluene, 13.7 mg of sesquichloride ethyl aluminum, the polymerization temperature was 40°C, and the polymerization time was 24 h. Terminate the reaction with 200 mL of 0.1% hydrochloride ethanol, wash 3 times to remove the aluminum agent and unreacted monomer, and vacuum dry to obtain 350 grams of polyisoprene rubber material, of which the cis-1,4-structure accounts for 30mol%. The 3,4-structure accounts for 60 mol%, the anti-1,4-structure accounts for 10 mol%, the molecular weight is 381 000 g / mol, and the molecular weight distribution is 3.27.

Embodiment 2

[0028] Add 67.9 mg of ferric bromide complex (C2), 100 mL of isoprene monomer, 62 mg of triphenyl phosphate and 85.5 mg of triethylaluminum to a 300 mL polymerization kettle in sequence. The polymerization temperature is 10°C. The time is 24 hours. Terminate the reaction with 200 mL of 0.1 wt% ethanol hydrochloride, wash 3 times to remove the solvent and unreacted monomer, and dry in vacuum to obtain 3 g of polyisoprene rubber material, in which the cis-1,4-structure accounts for 60 mol%. The 3,4-structure accounts for 10mol%, the anti-1,4-structure accounts for 30mol%, the weight average molecular weight is 27000 g / mol, and the molecular weight distribution is 2.28.

Embodiment 3

[0030] Add 84.8 mg of iron iodide complex (C3), 100 mL of isoprene monomer, 6.2 g of triphenyl phosphate, 1000 mL of solvent xylene and 311 mg of triisobutylaluminum into a 3 L polymerization kettle in sequence, and polymerize The temperature was 90°C and the polymerization time was 10 min. Terminate the reaction with 200 mL of 0.1 wt% ethanol hydrochloride, wash 3 times to remove the solvent and unreacted monomer, and dry in vacuum to obtain 2.1 g of polyisoprene rubber material, in which the cis-1,4-structure accounts for 33 mol%. The 3,4-structure accounts for 17mol%, the anti-1,4-structure accounts for 50mol%, the weight average molecular weight is 210000 g / mol, and the molecular weight distribution is 4.57.

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Abstract

The invention discloses high molecular weight polyisoprene rubber which simultaneously contains a 3,4-strucure, a cis-1,4 structure and a trans-4,4 structure, as well as a preparation method of the high molecular weight polyisoprene rubber and an adopted iron post-transition metal catalyst composition. The polyisoprene rubber disclosed by the invention has the characteristics of not only being good in slipper resistance, but also being low in generated heat, and is in particular suitable for a high-performance tyre and other rubber products. The catalyst system disclosed by the invention is insensitive to water, oxygen gas, carbon dioxide and the like, and gentle in experimental operation conditions.

Description

technical field [0001] The invention belongs to the field of polydiene rubber materials, and more specifically relates to a polydiene compound with a high molecular weight simultaneously containing 3,4-structure), cis-1,4-structure) and trans-1,4-structure Pentadiene rubber, a preparation method thereof, and an iron-based late-transition metal catalyst composition used. Background technique [0002] The late-transition metal catalysts that appeared in the 1990s showed high catalytic activity, and the catalytic cost was sometimes even lower than that of Ziegler-Natta catalysts, showing good potential for industrial applications [Coordination Chemistry Reviews (2010) , 254: 661-676]. It exhibits the characteristics of Lewis acid, has good tolerance to polar groups, and provides the possibility for industrial production of functional polyolefin products. 一些中国发明专利介绍了后过渡金属催化剂的制备(200710064961.9; 200910078174.9;200910078595.1;201210325646.8; 01118568.6 03153153.9;200410005634...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/08C08F4/70
Inventor 贺爱华姜秀波孙文华刘晨光邵华锋王日国
Owner QINGDAO UNIV OF SCI & TECH
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