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Polyimide composite film for special cable and preparation method thereof

A technology of polyimide film and polyimide, which is applied in the direction of coating, etc., can solve the problems of interfacial bonding force regulation, processing difficulty, easy peeling, etc., and achieve good interface bonding, coating uniformity and compactness improvement , the effect of comprehensive performance

Pending Publication Date: 2021-12-24
WUXI SHUNXUAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyimide / fluorine resin cable wrapping composite film is widely used in the fields of high temperature resistant cables for ships and aerospace because of its excellent properties such as temperature resistance, hydrolysis resistance, acid and alkali resistance, chemical corrosion resistance, weather resistance, and insulation. However, at this stage, such products are completely dependent on imports from the United States, and the country is still unable to break through the technical barriers, which makes the research and development of domestic high-tech equipment subject to others and affects the healthy development of domestic related industries.
The problems existing in the prior art mainly contain three aspects, one is that domestic high-modulus and high-strength polyimide films are difficult to develop, resulting in poor mechanical strength of the composite film; PTFE) resin is difficult to process, and it is difficult to coat the surface of polyimide film (PI) uniformly and densely; the third is the control of interfacial binding force, and the extremely low surface energy of PTFE makes it easy to peel off after combining with PI

Method used

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  • Polyimide composite film for special cable and preparation method thereof
  • Polyimide composite film for special cable and preparation method thereof
  • Polyimide composite film for special cable and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The polyimide film for preparing polyimide composite film for special cables is composed of aromatic diamine and aromatic dianhydride, and the aromatic diamine is p-phenylenediamine (p-PD) and 4,4'- Diaminodiphenyl ether (ODA), wherein the amount of p-phenylenediamine is 70% of the total molar amount of aromatic diamines, and the amount of 4,4'-diaminodiphenyl ether is 30% of the total molar amount of aromatic diamines. %; Aromatic dianhydrides are pyromellitic dianhydride (PMDA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA), wherein the amount of pyromellitic dianhydride is The amount of 3,3',4,4'-biphenyltetracarboxylic dianhydride is 70% of the total molar amount of aromatic dianhydride; aromatic diamine and aromatic dianhydride The molar ratio is 1:0.999; the solvent is N,N-dimethylacetamide (DMAC), and the dosage is 80% of the total mass of aromatic diamine and aromatic dianhydride.

[0027] The preparation method of above-mentioned polyimide film, co...

Embodiment 2

[0031] The polyimide film for preparing polyimide composite film for special cables is composed of aromatic diamine and aromatic dianhydride, and the aromatic diamine is p-phenylenediamine (p-PD) and 4,4'- Diaminodiphenyl ether (ODA), wherein the amount of p-phenylenediamine is 50% of the total molar amount of aromatic diamines, and the amount of 4,4'-diaminodiphenyl ether is 50% of the total molar amount of aromatic diamines 50%; aromatic dianhydrides are pyromellitic dianhydride (PMDA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA), and the amount of pyromellitic dianhydride The amount of 3,3',4,4'-biphenyltetracarboxylic dianhydride is 50% of the total molar amount of aromatic dianhydride; the amount of aromatic diamine and aromatic di The anhydride molar ratio is 1:0.999; the solvent is N,N-dimethylacetamide (DMAC), and the dosage is 80% of the total mass of the aromatic diamine and the aromatic dianhydride.

[0032] The preparation method of above-mentioned p...

Embodiment 3

[0036] Polyimide film for preparing polyimide composite film for special cables, composed of aromatic diamine and aromatic dianhydride, aromatic diamine is 4,4'-diaminodiphenyl ether (ODA); aromatic The family dianhydrides are pyromellitic dianhydride (PMDA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA), wherein, the amount of pyromellitic dianhydride is aromatic di 50% of the total molar anhydride, the consumption of 3,3',4,4'-biphenyltetracarboxylic dianhydride is 50% of the total molar aromatic dianhydride; the molar ratio of aromatic diamine to aromatic dianhydride is 1:0.999; the solvent is N,N-dimethylformamide (DMF), and the dosage is 80% of the total mass of aromatic diamine and aromatic dianhydride.

[0037] The preparation method of above-mentioned polyimide film, comprises the following steps:

[0038] (1) 4,4'-diaminodiphenyl ether (ODA) was stirred and dissolved in the organic solvent N,N-dimethylformamide (DMF), and then added aromatic dianhydride pyr...

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Abstract

The invention discloses a polyimide composite film for a special cable and a preparation method thereof, and belongs to the technical field of polyimide films. The preparation method of the composite film specifically comprises the following steps: (1) dissolving aromatic diamine in an organic solvent, uniformly mixing, and then adding aromatic dianhydride for reaction; (2) when the viscosity of the reaction liquid is 60000-80000cp, stably producing a polyimide film on a production line; and (3) compounding the polyimide film prepared in the step (2) with a fluororesin layer to prepare the polyimide composite film for the special cable. The polyimide film has excellent strength and elongation at break, and the composite film obtained by compounding the polyimide film with the fluororesin layer has arc resistance time of more than 8 h, hydrolysis resistance time of more than 4000 h, low water absorption and low water content, has more excellent performance, and can ensure safe use of cables under extreme conditions.

Description

technical field [0001] The invention belongs to the technical field of polyimide films, and in particular relates to a polyimide composite film for special cables and a preparation method thereof. Background technique [0002] Polyimide / fluorine resin cable wrapping composite film is widely used in the fields of high temperature resistant cables for ships and aerospace because of its excellent properties such as temperature resistance, hydrolysis resistance, acid and alkali resistance, chemical corrosion resistance, weather resistance, and insulation. However, at this stage, such products are completely dependent on imports from the United States, and the country is still unable to break through the technical barriers, which makes the research and development of domestic high-tech equipment subject to others and affects the healthy development of domestic related industries. The problems existing in the prior art mainly contain three aspects, one is that domestic high-modulu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C08G73/10C08L79/08
CPCC08J7/042C08J5/18C08G73/1071C08G73/1007C08J2379/08C08J2427/18
Inventor 刘宸宇肖超贝润鑫韩春香蒋俊超杨明唐泽
Owner WUXI SHUNXUAN NEW MATERIALS