Polyimide coating with high-temperature resistance and preparation method thereof

A technology of polyimide and polyimide resin, which is applied in the field of high-temperature-resistant polyimide coatings and its preparation, can solve the problem that the heat-resistant grade cannot reach high-temperature resistance, and the qualification rate and reliability of devices cannot be guaranteed and other issues to achieve the effect of low cost, easy adjustment, and convenient source

Inactive Publication Date: 2011-10-19
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) Interlayer insulating dielectric material: Although deposited silicon dioxide can also be used as an interlayer insulating dielectric material for a monolithic integrated circuit multilayer structure, for this structure, due to the influence of metal edges and interlayer connection via holes , so that the qualification rate and reliability of the device cannot be guaranteed
However, its heat resistance level is not as high as high temperature resistance
[0012] Developed countries such as Europe and the United States attach great importance to the research and development of high-temperature resistant electromagnetic wire paint. For example, the American PHELPSDODGE company and the German HERBERTS company have successfully developed 200-grade corona-resistant electromagnetic wire paint, which has been successfully applied to AC-DC-AC. The coils of traction motors are being manufactured, and satisfactory technical results have been obtained, but there is no electromagnetic wire paint product with a higher heat resistance level available

Method used

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  • Polyimide coating with high-temperature resistance and preparation method thereof
  • Polyimide coating with high-temperature resistance and preparation method thereof
  • Polyimide coating with high-temperature resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 15.20 grams (0.1 moles) of 3,5-diaminobenzoic acid, 2.92 grams (0.01 moles) of 1,3-bis(3-aminophenoxy)benzene and 220 milliliters of N-methyl-2-pyrrolidone strongly polar Put the aprotic organic solvent into the reaction kettle, at room temperature, after stirring and dissolving completely, add 32.34 grams (0.11 moles) of aromatic dibasic acid anhydride powder of 3,3',4,4'-tetracarboxylic biphenyl dianhydride, at room temperature After stirring and reacting for 1.5-2 hours, a homogeneous transparent viscous resin solution was obtained; 44 ml of toluene azeotropic dehydrating agent was added, and after azeotropic reflux and water separation for 4-5 hours, 70 ml of azeotropic dehydrating agent and Part of the strong polar aprotic organic solvent to obtain a reactive polyimide resin solution with a solid content of 20%-25%, denoted as BPI206; take out a small amount of resin solution, remove the solvent, and dry to obtain a dry reactive polyimide resin solution Polyimide r...

Embodiment 2

[0050] 1.52 grams (0.01 moles) of 3,5-diaminobenzoic acid, 29.20 grams (0.1 moles) of 1,3-bis(3-aminophenoxy)benzene and 350 milliliters of N,N-dimethylacetamide were strongly polarized Put the neutral aprotic organic solvent into the reaction kettle, at room temperature, after stirring and dissolving completely, add 34.10 grams (0.11 moles) of aromatic dibasic acid anhydride powder of 3,3',4,4'-tetracarboxylic diphenyl ether dianhydride After stirring and reacting at room temperature for 1.5-2 hours, a homogeneous transparent viscous resin solution was obtained; 35 ml of xylene azeotropic dehydrating agent was added, and after azeotropic reflux and water separation for 4-5 hours, 180 ml of azeotropic dehydrating agent and some strong polar aprotic organic solvents to obtain a reactive polyimide resin solution with a solid content of 20%-25%, which is denoted as OPI240; a small amount of resin solution is taken out, the solvent is removed, and dried to obtain a dry Reactive po...

Embodiment 3

[0057] 15.20 grams (0.1 moles) of 3,5-diaminobenzoic acid, 29.20 grams (0.1 moles) of 1,3-bis(3-aminophenoxy)benzene, 50 milliliters of N-methyl-2-pyrrolidone and 450 milliliters N,N-Dimethylacetamide strong polar aprotic organic solvent is put into the reaction kettle, after stirring and dissolving completely at room temperature, add 31.00 g (0.1 mole) of 3,3',4,4'-tetracarboxylic dicarboxylic acid Phenyl ether dianhydride and 52.05 grams (0.1 mole) of 2,2-bis[4-(3,4-dicarboxyphenoxy) phenyl] propane dianhydride aromatic dibasic anhydride powder, stirring reaction at room temperature for 1.5- After 2 hours, obtain a homogeneous transparent viscous resin solution; add 25 milliliters of xylene and 50 milliliters of toluene azeotropic dehydrating agent, after azeotropic reflux and water separation reaction for 4-5 hours, separate 125 milliliters of azeotropic dehydrating agent and Part of the strong polar aprotic organic solvent to obtain a reactive polyimide resin solution with...

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Abstract

The invention relates to a polyimide coating with high-temperature resistance and a preparation method thereof. The polyimide coating is prepared from the following raw materials: a reactable polyimide resin solution, N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dimethyl diphenylmethane, dicyandiamide, nanoscale inorganic powder and an organic solvent. The preparation method comprises the following steps: mixing the first four components, heating the mixture to 80 DEG C, stirring to react for 0.5-1 hour, adding the organic solvent and uniformly stirring to obtain the polyimide coating. In the invention, the raw material resin has easily controlled molecular weight and easily adjusted molecular structure, thus favoring the preparation of the high-temperature-resistant polyimide coating with ideal performance; the preparation method has moderate reaction conditions, is performed under normal pressure and is simple to operate; and the preparation method has convenient raw material sources and low cost and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of polyimide coatings, in particular to a high-temperature-resistant polyimide coating and a preparation method thereof. Background technique [0002] With the development of aerospace, electronic and electrical industries and the improvement of electrical and electrical technology, the demand for high-temperature-resistant polyimide coatings is increasing. As the main variety of high-temperature-resistant polyimide coatings, polyamide-imide The demand for coatings, fluorine-containing polyimide coatings, fluorosilicon polyimide coatings, polyesterimide coatings, etc. is also increasing. [0003] Polyimide coatings have good application prospects in ship shells, missile cones, optical fibers, household appliances, power cables, communication cables, electromagnetic wires, semiconductor silicon chips, non-stick pans, and electrical insulating paints. [0004] The resin department of Ciba-Geigy company has de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D7/12
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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