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Selective hydrogenation method of conjugated diene latex

A conjugated diene and selective technology, which is applied in the field of selective hydrogenation of conjugated diene latex to achieve the effects of low usage, rapid industrialization, and less severe hydrogenation conditions

Active Publication Date: 2020-09-22
山东京博中聚新材料有限公司 +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 of conjugated diene latex
  • Selective hydrogenation method of conjugated diene latex
  • Selective hydrogenation method of conjugated diene latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Catalyst using hydrogen degassing process

[0151] A 300 mL stainless steel high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with a limited acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4 @ 100°C) of about 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. 100 ml of this latex, 0.000236 g of Hevida-Grubbs II catalyst were charged to the reactor. Then feed hydrogen to keep the system pressure at 2 MPa, and bubble at room temperature for 60 minutes to degas the latex. The temperature was raised to 110°C and the hydrogen pressure was increased to 1100 psi (7.58 MPa). After reacting for 8 hours, after the reaction, the hydrogenated NBR latex was coagulated with ethanol to obtain a HNBR copolymer. The condensate was then dissolved in MEK to analy...

Embodiment 2

[0154] Catalyst using hydrogen degassing process 2

[0155] A 300 mL stainless steel high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with a limited acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4 @ 100°C) of about 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. 100 ml of this latex, 0.000236 g of Hevida-Grubbs II catalyst were charged to the reactor. Then, hydrogen was introduced to keep the system pressure at 2MPa, and the latex was degassed by bubbling at room temperature for 30 minutes. The temperature was raised to 110°C and the hydrogen pressure was increased to 1100 psi (7.58 MPa). After reacting for 8 hours, after the reaction, the hydrogenated NBR latex was coagulated with ethanol to obtain a HNBR copolymer. The condensate was then diss...

Embodiment 3

[0158] Catalyst using hydrogen degassing process3

[0159] A 300 mL stainless steel high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A smooth butadiene-acrylonitrile polymer latex with a limited acrylonitrile content of about 33% by weight and a Mooney viscosity (ML1+4 @ 100°C) of about 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. 100 ml of this latex, 0.000236 g of Hevida-Grubbs II catalyst were charged to the reactor. Then, hydrogen was introduced to keep the system pressure at 1MPa, and the latex was degassed by bubbling at room temperature for 60 minutes. The temperature was raised to 110°C and the hydrogen pressure was increased to 1100 psi (7.58 MPa). After reacting for 8 hours, after the reaction, the hydrogenated NBR latex was coagulated with ethanol to obtain a HNBR copolymer. The condensate was then disso...

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Abstract

The invention provides a selective hydrogenation method of conjugated diene latex, which comprises: carrying out a hydrogenation reaction on conjugated diene latex and a group VIII metal compound catalyst represented by a formula (I) to obtain a hydrogenated polymer; wherein hydrogen is adopted to degas the latex before the hydrogenation reaction. According to the method, the VIII-group metal compound catalyst shown in the formula (I) is adopted to catalyze hydrogenation of the conjugated diene latex, no cocatalyst or organic solvent is used in the using process of the catalyst, and no substance except for the catalyst is used; compared with the prior art, the catalyst is high in NBR latex hydrogenation efficiency and low in catalyst usage amount; the catalyst is not harsh in hydrogenationcondition and low in temperature and pressure. Meanwhile, by controlling the degassing mode of the specific conjugated diene latex, the catalytic activity of the catalyst on the latex is high under mild temperature and pressure, the catalytic efficiency is high, and 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): C08F8/04C08F236/12C08F220/44
CPCC08F8/04C08F236/12C08F220/44
Inventor 王辉刘振学黎艳艳任学斌郭宗磊王孝海周德芳王耀伟曹峰郝福兰杜庆之佟伟超栾波马韵升
Owner 山东京博中聚新材料有限公司
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