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Nanometer modified polyimide and preparation system and method of nanometer modified polyimide

A polyimide, nano-modification technology, applied in the field of nano-modified polyimide and its preparation system and preparation, can solve the problems of small molecular weight, poor control of processing parameters, and influence on dianhydride reactivity, etc., to achieve Increased voltage resistance, convenient preparation method, and the effect of reducing viscosity

Inactive Publication Date: 2017-09-08
苏州中亚芯能新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in the preparation process of polyimide, due to the strong complexation between dianhydride and polar solvent, the reactivity of dianhydride is affected, and the existence of trace water in the solvent makes it form a trace homogeneous Pyrellitic acid acts as a polymerization inhibitor, so that the molecular weight is very small, and some processing parameters are not well grasped, resulting in unqualified parameters of the prepared polyimide film

Method used

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  • Nanometer modified polyimide and preparation system and method of nanometer modified polyimide
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  • Nanometer modified polyimide and preparation system and method of nanometer modified polyimide

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preparation example Construction

[0042] A polyimide preparation method of the above system, comprising the following steps: preparation of polyimide solution and preparation of polyimide film;

[0043] S1: In a polar solvent, add pyromellitic dianhydride to dimethylacetamide in batches and react at normal temperature and pressure. The pyromellitic dianhydride is added at least three times to generate high-molecular-weight polyphthalein Amino acid solution, and adding titanium dioxide and barium metaoxide;

[0044] S2: Dry the solid PAA film to remove the solvent, heat treatment in vacuum or inert medium slowly continuously or stepwise to higher than 300°C;

[0045] The reaction formula is:

[0046]

[0047] Preferably, the ratio of pyromellitic dianhydride to biphenyl ether diamine is 1.020˜1.030:1.

[0048] Preferably, the polar solvent includes dimethylformamide or dimethylacetamide or N-methylpyrrolidone or pyridoxine or dimethyl sulfoxide.

[0049] Preferably, in S2, the polyamic acid (PAA) solution...

Embodiment 1

[0058] A nano-modified polyimide, comprising the following components: 10 parts of polyimide, 5 parts of benzophenone tetracarboxylic anhydride, 6 parts of 4,4'-oxidized dianiline, 3 parts of end-capping agent, and 5 parts of titanium dioxide and 6 parts of barium oxide, the blocking agent can be norbornenyl monoethyl ester or norbornenyl monomethyl ester, and the present embodiment selects norbornenyl monoethyl ester.

Embodiment 2

[0060] A nano-modified polyimide, comprising the following components: 12 parts of polyimide, 7 parts of benzophenone tetracarboxylic anhydride, 8 parts of 4,4'-dianiline oxide, 4 parts of end-capping agent, and 8 parts of titanium dioxide And 15 parts of barium oxide, the blocking agent can be norbornenyl monoethyl ester or norbornenyl monomethyl ester, and the present embodiment selects norbornenyl monoethyl ester.

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Abstract

The invention provides nanometer modified polyimide and a preparation system and method of the nanometer modified polyimide. The preparation system comprises a solution preparation system and a thin film preparation system, wherein the solution preparation system comprises a reaction kettle which is provided with two liquid inlets, and the liquid inlets are communicated with a dianhydride solvent tank and a diamine solvent tank respectively; the thin film preparation system comprises an imidization furnace, a winding machine and a film-drawing mechanism, and a defoaming tank is communicated with the film-drawing mechanism through a slobbering nozzle. The preparation method comprises the following steps of preparing a polyimide solution and preparing a polyimide thin film. Solid dianhydride is added into a polar solution of diamine by several times, a lot of diamine molecules are made to attack the surface of the suspending dianhydride, a polymerization reaction is quickly conducted, so that the situation that the ratio of the dianhydride to the diamine is destroyed due to the consumption caused by complexation of the dianhydride and the solvents is avoided, and a high-concentration and stable PAA solution is generated. When the polyimide thin film prepared by using the method is used, the parameters are qualified, and the quality of the finished product is excellent.

Description

technical field [0001] The invention relates to the field of new materials, in particular to nano-modified polyimide and its preparation system and preparation method. Background technique [0002] Polyimide film has high heat resistance and high electrical insulation, and even a thin film can satisfy the rigidity, heat resistance, and electrical insulation required for use. Therefore, polyimide films are widely used in industrial fields such as electrical insulation films, diaphragm heat, and base films for flexible circuit substrates. In addition, polyimide films have also been used in solar cell substrates and the like in recent years. [0003] In the prior art, in the preparation process of polyimide, due to the strong complexation between dianhydride and polar solvent, the reactivity of dianhydride is affected, and the existence of trace water in the solvent makes it form a trace homogeneous Pyrellitic acid acts as a polymerization inhibitor, so that the molecular wei...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08G73/12C08K3/22C08J5/18
CPCC08L79/085C08G73/126C08J5/18C08J2379/08C08J2479/08C08K2003/2241C08L79/08C08L2201/08C08L2203/16C08L2205/02C08K3/22C08K3/18
Inventor 王利泉
Owner 苏州中亚芯能新材料科技有限公司