Selective hydrogenation method for conjugated diene latex

A conjugated diene, selective technology, applied in the field of selective hydrogenation of conjugated diene latex, to achieve the effect of low temperature and pressure, high catalytic activity, and high hydrogenation efficiency

Active Publication Date: 2020-03-06
QINGDAO UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, both routes are bottlenecked in achieving fast hydrogenation reaction rates, high conversions and eliminating gel formation

Method used

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  • Selective hydrogenation method for conjugated diene latex
  • Selective hydrogenation method for conjugated diene latex
  • Selective hydrogenation method for conjugated diene latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0161] Heveda-Grubbs II Catalyst

[0162] A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with an acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4@100°C) of 55 was used. The solids content of the latex was 23.6% by weight. The average diameter of the polymer particles in the latex is about 88 nm. The reactor was charged with 50ml of latex, 0.00212g of Hevida-Grubbs II, and then 50ml of latex was added. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, raise the temperature to 90°C, raise the hydrogen pressure to 1000psi (6.89MPa), and react for 3h. A...

Embodiment 2

[0165] Heveda-Grubbs II Catalyst

[0166]A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with an acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4@100°C) of 55 was used. The solids content of the latex was 23.6% by weight. The average diameter of the polymer particles in the latex is about 88 nm. The reactor was charged with 50ml of latex, 0.000236g of Hevida-Grubbs II, and then 50ml of latex. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, raise the temperature to 90°C, raise the hydrogen pressure to 1000psi (6.89MPa), and react for 6h. After the r...

Embodiment 3

[0169] Heveda-Grubbs II Catalyst

[0170] A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with an acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4@100°C) of 55 was used. The solids content of the latex was 23.6% by weight. The average diameter of the polymer particles in the latex is about 88 nm. The reactor was charged with 50ml of latex, 0.000118g of Hevida-Grubbs II, and then 50ml of latex. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, raise the temperature to 90°C, raise the hydrogen pressure to 1000psi (6.89MPa), and react for 12h. After the...

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Abstract

The invention provides a selective hydrogenation method for conjugated diene latex. The method comprises the step of subjecting the conjugated diene latex to a hydrogenation reaction with a compound catalyst of metal of a family VIII represented by a formula (I) shown in the description, thereby obtaining a hydrogenated polymer. According to the method, latex hydrogenation of the conjugated dienelatex is catalyzed by employing the compound catalyst of the metal of the family VIII represented by the formula (I); during the use of the catalyst, no cocatalyst and no organic solvent are employed,and no substance except for the catalyst is employed; compared with the prior art, the method has the advantages that the catalyst has high hydrogenation efficiency to NBR latex, and the consumptionof the catalyst is low; and hydrogenation conditions of the catalyst are not harsh, the temperature and pressure are not high, the catalyst has high catalyzing activity to the latex under the condition of moderate temperature and pressure, and thus, realization of rapid industrialization is facilitated.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for selectively hydrogenating conjugated diene latex. Background technique [0002] The research and development of hydrogenated diene-based rubber products mainly refers to obtaining rubber products with required properties through formula design and subsequent processing methods according to the application environment of rubber parts. At present, whether in the laboratory or in industrial production, there are mainly three ways to prepare hydrogenated diene-based rubber. Hydrogenated parent diene-based unsaturated polymers, such as nitrile rubber prepared by polymerization of acrylonitrile and butadiene (also known as is NBR), is well known, taking NBR as an example as follows. [0003] (1) Acrylonitrile-ethylene copolymerization method. In the ethylene-acrylonitrile copolymerization reaction, since there is a large difference in the reactivity ratio of acrylonitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/02
CPCC08C19/02
Inventor 王辉马韵升黎艳艳栾波王耀伟任学斌刘振学周德芳曹峰郭宗磊郝福兰佟伟超杜庆之
Owner QINGDAO UNIV OF SCI & TECH
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