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A process for improving the mixing uniformity of bisphenol A-type cyanate ester monomers

A type of cyanate ester and uniformity technology, which is applied in the process field of improving the blending uniformity of bisphenol A type cyanate ester monomers, and can solve the problem that the uniformity and monomer quality of bisphenol A type Cyanate ester resin production quality and other issues, to achieve good adsorption, improve the effect of impurity removal efficiency

Active Publication Date: 2022-02-18
YANGZHOU TECHIA MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing blending method is through simple physical blending. It is difficult to achieve the uniformity of blending by physical blending. The inhomogeneity of monomer quality directly affects the quality of bisphenol A cyanate resin. production quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A process for improving the blending uniformity of bisphenol A type cyanate monomers, comprising the steps of:

[0042] The first step is to dissolve the bisphenol A cyanate monomer produced in different batches in acetone at the same time according to the ratio of solid to liquid 1g: 20mL, and stir well to form a monomer mixture;

[0043] The second step is to add modified chitosan to the above-mentioned monomer mixture according to the solid-liquid ratio of 1g: 10mL, first pump the negative pressure to -0.04Mpa, stir at room temperature for 25min, then restore the pressure and raise the temperature to 80°C and continue stirring for 110min , filter while hot with a ceramic membrane, and collect the filtrate;

[0044] Stirring at room temperature under negative pressure conditions mainly achieves the physical adsorption of chitosan. Chitosan itself is an adsorbent. Negative pressure conditions can improve the adsorption efficiency of chitosan and adsorb sodium sulfate i...

Embodiment 2

[0049] A process for improving the blending uniformity of bisphenol A type cyanate monomers, comprising the steps of:

[0050] The first step is to dissolve the bisphenol A cyanate monomer produced in different batches in acetone at the same time according to the ratio of solid to liquid: 1g: 25mL, and stir well to form a monomer mixture;

[0051] The second step is to add modified chitosan to the above-mentioned monomer mixture according to the solid-to-liquid ratio of 1g: 10mL, first pump the negative pressure to -0.04Mpa, stir at room temperature for 28min, then restore the pressure and raise the temperature to 83°C and continue stirring for 115min , filter while hot with a ceramic membrane, and collect the filtrate;

[0052] Stirring at room temperature under negative pressure conditions mainly achieves the physical adsorption of chitosan. Chitosan itself is an adsorbent. Negative pressure conditions can improve the adsorption efficiency of chitosan and adsorb sodium sulfa...

Embodiment 3

[0057] A process for improving the blending uniformity of bisphenol A type cyanate monomers, comprising the steps of:

[0058] The first step is to dissolve the bisphenol A cyanate monomer produced in different batches in acetone at the same time according to the ratio of solid to liquid: 1g: 30mL, and stir well to form a monomer mixture;

[0059] The second step is to add modified chitosan to the above-mentioned monomer mixture according to the solid-to-liquid ratio of 1g: 10mL, first pump the negative pressure to -0.04Mpa, stir at room temperature for 30min, then restore the pressure and raise the temperature to 85°C and continue stirring for 120min , filter while hot with a ceramic membrane, and collect the filtrate;

[0060] Stirring at room temperature under negative pressure conditions mainly achieves the physical adsorption of chitosan. Chitosan itself is an adsorbent. Negative pressure conditions can improve the adsorption efficiency of chitosan and adsorb sodium sulfa...

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Abstract

The invention discloses a process for improving the blending uniformity of bisphenol A cyanate monomers, which comprises the following steps: the first step is dissolving bisphenol A cyanate monomers in acetone to form a monomer mixture liquid; the second step, adding modified chitosan to the monomer mixture for processing; the third step, using supercritical carbon dioxide to process the filtrate; the fourth step, crystallization process; the fifth step, scraping the formed Crystals. The present invention treats the monomer mixed liquid by adopting modified chitosan, not only can remove sodium sulfate, triethylamine, dichloromethane impurities insoluble in acetone by physical adsorption, but also can remove unreacted cyanogen halide by chemical adsorption , Monofunctional cyanate impurities that have not been completely cyanated to obtain a purified monomer solution; then supercritical carbon dioxide is used to treat the monomer solution and then crystallize, which can promote the formation of regular crystals and increase the concentration of cyanic acid from the crystal form. The uniformity of the ester monomer is easy to open up the market.

Description

technical field [0001] The invention belongs to the technical field of cyanate ester resin production, and in particular relates to a process for improving the blending uniformity of bisphenol A type cyanate ester monomers. Background technique [0002] Cyanate resin is a new type of high-performance thermosetting resin, which has outstanding electrical properties, and has excellent dielectric properties and dielectric loss values ​​in a wide frequency range. The basic raw material of materials and aerospace structural materials, cyanate ester resin has been recognized as one of the most competitive resin qualities in the 21st century. Cyanate ester resins include bisphenol A type, dicyclopentadiene type, bisphenol E type, phenolic type, bisphenol M type, etc. Among them, bisphenol A type cyanate resin has excellent cost performance and mature synthesis process , High heat resistance characteristics. [0003] In the production process of bisphenol A cyanate resin, the qual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C261/02C08B37/08
CPCC07C261/02C08B37/003Y02P20/54
Inventor 季静静吕嘉木朱芝峰邵家伟
Owner YANGZHOU TECHIA MATERIAL CO LTD
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