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Method for preparing hydrogenated diene-based nano-emulsion and application of gemini surfactant

A Gemini Surface, Nanoemulsion Technology Applied in the Field of Hydrogenated Diene-Based Nanolatex Particles

Pending Publication Date: 2019-12-06
王辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, both approaches suffer from shortcomings in order to obtain fast hydrogenation reaction rates, high conversions and eliminate gel formation

Method used

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  • Method for preparing hydrogenated diene-based nano-emulsion and application of gemini surfactant
  • Method for preparing hydrogenated diene-based nano-emulsion and application of gemini surfactant
  • Method for preparing hydrogenated diene-based nano-emulsion and application of gemini surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0231] NBR preparation

[0232] Conditions and procedures were the same as described in Comparative Example 1, except that a redox initiator system was used. The redox system includes 0.2 parts of di-tert-butyl hydroperoxide, 0.1 parts of ferrous sulfate and 0.2 parts of sodium formaldehyde sulfoxylate. The redox system replaces 1 part of KPS in Example 1. The reaction temperature was 15°C. The average diameter of the polymer particles in the latex is about 16 nm.

[0233] Hydrogenation operation

[0234] The hydrogenation operation was consistent with the use of 0.0378g catalyst RhCl (TPPMS) in Comparative Example 1 3 . The difference is that 0.378g of cocatalyst triphenylphosphine is used more, and the added amount of triphenylphosphine is 0.378g.

[0235] The results showed that after 8 hours, the degree of hydrogenation reached 95%. No gel was produced and the resulting polymer was dissolved in methyl ethyl ketone.

Embodiment 2

[0237] NBR preparation

[0238] Conditions and procedures were the same as described in Comparative Example 1. The average diameter of the polymer particles in the latex is about 18 nm.

[0239] Hydrogenation operation

[0240] The hydrogenation operation is consistent with Comparative Example 1, the difference is that 0.0098g catalyst RhCl (TPPMS) is used 3 and 0.378 g of cocatalyst triphenylphosphine.

[0241] The results showed that after 10 hours, the degree of hydrogenation reached 85%. No gel was produced and the resulting polymer was dissolved in methyl ethyl ketone.

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Abstract

The invention discloses a method for preparing a hydrogenated diene-based nano-emulsion and application of a gemini surfactant. The method for preparing the hydrogenated diene-based nano-emulsion comprises the following steps: (1) carrying out a polymerization reaction on a diene monomer and a copolymerizable monomer in the presence of a polymerization initiator and a gemini surfactant so as to obtain a diene-based unsaturated polymer nano-emulsion; and (2) carrying out a hydrogenation reaction on the diene-based unsaturated polymer nano-emulsion and hydrogen in an aqueous medium containing the gemini surfactant, a water-insoluble rhodium metal catalyst and a water-insoluble cocatalyst so as to obtain the hydrogenated diene-based nano-emulsion. According to the invention, the diene-based nano-emulsion with a particle size of less than 20 nm can be effectively prepared by using the method; and selective hydrogenation of a diene-based polymer latex can be effectively realized at a high speed without usage of any organic solvent, and no problem in gelation occurs.

Description

technical field [0001] The invention belongs to the field of hydrogenated diene-based nano latex particles, specifically, the invention relates to a method for preparing hydrogenated diene-based nano-emulsions and the use of gemini surfactants 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 laboratory or industrial production, there are mainly three ways to prepare hydrogenated diene-based rubber, diene-based unsaturated polymers, such as nitrile rubber (also known as NBR) prepared by polymerization of acrylonitrile and butadiene. ), 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...

Claims

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Application Information

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IPC IPC(8): C08F236/12C08F8/04
CPCC08F8/04C08F236/12
Inventor 王辉
Owner 王辉
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