Method for preparing poly(arylene ether nitrile) resin

A technology of polyarylether nitrile and resin, which is applied in the field of preparation of polyarylether nitrile resin, can solve the problems of solvent not being recovered and recycled by rectification, high reaction temperature and pressure, and limited application range of resin, etc., to overcome side effects Effects of reactions and by-products, stable performance, and easy-to-achieve production conditions

Active Publication Date: 2010-09-22
SICHUAN FEIYA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are three deficiencies in the production methods described in these patents: the one is that the reaction temperature and the reaction pressure are relatively high (the reaction temperature reaches 180~300 ℃, and the reaction pressure reaches 2~5MPa); In this purification method, the purity of the product is low due to the fact that some inorganic salt particles are still wrapped in the resin, which limits the application range of the resin; the third is that the solvent is not recycled by rectification, resulting in increased raw material costs and environmental pollution

Method used

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  • Method for preparing poly(arylene ether nitrile) resin

Examples

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Embodiment 1

[0022] According to the following molar ratio: 2,6-dichlorobenzonitrile: hydroquinone: resorcinol: anhydrous potassium carbonate: N-methylpyrrolidone: toluene=1:0.9:0.1:1.2:6:1.3 Weigh the raw materials into the reactor, heat and stir to 140°C for dehydration reaction. During the dehydration reaction, the water produced by the reaction is separated by a reflux device and toluene is refluxed; after the dehydration reaction for 2 hours, the reaction system is heated to 200°C and atmospheric pressure When the polymerization reaction occurs until the phenomenon of polymer climbing rods occurs, the diluted solution of N-methylpyrrolidone solvent is injected into the reactor until the solution viscosity is less than 2000 centipoise. The diluted solution system is sprayed into the precipitation tank containing the precipitating agent in the manner of pressure spray, and then heated and stirred, fully refluxed, and separated by a centrifuge for solid-liquid separation, and the separated...

Embodiment 2

[0026] According to the following molar ratio: 2, 6-dichlorobenzonitrile: biphenol: anhydrous potassium carbonate: N-methylpyrrolidone: toluene = 1:1:1.3:7:1.4 weigh the raw materials into the reactor During the dehydration reaction, the water produced by the reaction is separated by a reflux device and the toluene is refluxed; after the dehydration reaction for 3 hours, the reaction system is heated to 200°C and polymerized under normal pressure until the polymer When the pole climbs, the diluted solution of N-methylpyrrolidone solvent is injected into the reactor until the solution viscosity is less than 2000 centipoise. The diluted solution system is sprayed into the precipitation tank containing the precipitating agent in the manner of pressure spray, and then heated and stirred, fully refluxed, and separated by a centrifuge for solid-liquid separation, and the separated liquid is transported to the rectification tower for rectification and recovery of the solvent In order ...

Embodiment 3

[0031] According to the following molar ratio: 2,6-dichlorobenzonitrile: bisphenol A: anhydrous potassium carbonate: N-methylpyrrolidone: toluene = 1:1:1.2:6:1.3 Weigh the raw materials into the reactor , Heating and stirring to 140°C for dehydration reaction. During the dehydration reaction, the water produced by the reaction is separated by a reflux device and toluene is refluxed; after the dehydration reaction for 3 hours, the reaction system is heated to 200°C and the polymerization reaction is carried out under normal pressure until polymer creep occurs. During the rod phenomenon, the N-methylpyrrolidone solvent diluted solution injected into the reaction kettle until the solution viscosity is less than 2000 centipoise. The diluted solution system is sprayed into the precipitation tank containing the precipitating agent in the manner of pressure spray, and then heated and stirred, fully refluxed, and separated by a centrifuge for solid-liquid separation, and the separated l...

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Abstract

The invention discloses a method for preparing poly(arylene ether nitrile) resin, which belongs to the technical field of high polymer materials. The method comprises the following steps of: finishing a reaction in a reaction kettle under normal pressure under the actions of a catalyst and a dehydrating agent by taking 2,6-dichlorobenzonitrile and aromatic dicarboxylic phenol as raw materials and taking N-methyl pyrrolidone as a solvent; pressurizing and atomizing solution after dilution to a precipitating agent for precipitating; after heating, stirring and refluxing a precipitate and the precipitating agent to finish solvent extraction, performing solid-liquid separation by using a centrifugal machine; allowing liquid to enter a rectifying tower for rectifying and recovering the solvent; and drying solid after washing with boiling water to obtain the poly(arylene ether nitrile) resin of the invention. The method has the characteristics of easily implemented production conditions, and safe and environmentally-friendly production process. The poly(arylene ether nitrile) resin prepared by adopting the method of the invention has the characteristics of high purity and stable performance, and can be applied to the field of aerospace, electronics, machinery, medical treatment, chemical industry and the like.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials and relates to a preparation method of polyarylether nitrile resin Background technique [0002] Polyarylene ether nitrile is a kind of thermoplastic polymer with a nitrile group on the side chain. It is a kind of structural type with excellent comprehensive performance and developed for the needs of the national defense industry and cutting-edge technology since the 1980s. Molecular materials have high heat resistance, flame retardancy, mechanical strength, UV resistance and creep resistance, and can be widely used in aerospace, electronic packaging, machinery manufacturing, automotive parts and other fields. [0003] The domestic research of polyarylene ether nitrile began in the 1980s, mainly focusing on the research of synthesis technology and formula. The domestic invention patents for polyarylene ether nitrile resin mainly include: "A polyarylene ether nitrile and its manufacturing metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40C08G65/46
Inventor 钟家春刘孝波杨建孟凡彬赵睿
Owner SICHUAN FEIYA NEW MATERIAL
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