Polyimide-epoxy type electrical insulating paint and preparation method thereof

An electrical insulation and polyimide technology, applied in the field of electrical insulating paint and its preparation, can solve the problems of low elongation, high brittleness, limited application, etc., and achieve the effects of excellent adhesion performance, moderate viscosity and convenient source.

Inactive Publication Date: 2012-08-22
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its low elongation and high brittleness, its application is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 54.8 grams (0.1 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane and 2700 milliliters of N,N-dimethylacetamide solvent were added to the reactor, After stirring and dissolving at room temperature to form a homogeneous solution, add 19.6 grams (0.2 moles) of maleic anhydride powder, stir and dissolve, continue stirring for 15 minutes, add 183.0 grams (0.5 moles) of 2,2-bis(3-amino-4 -Hydroxyphenyl) hexafluoropropane, after stirring and dissolving, add 286.0 grams (0.55 moles) of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride powder, stir at room temperature React for 1 hour, add 1500 ml of toluene, heat up to 115°C, reflux and separate water for 3 hours to obtain a maleimide-based polyimide resin solution, adjust the solid content to be in the range of 10%-15% Inside, denoted as MHPIS-15.

Embodiment 2

[0030]109.6 grams (0.2 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane and 820 milliliters of N,N-dimethylacetamide solvent were added to the reactor, After stirring and dissolving at room temperature to form a homogeneous solution, add 39.2 grams (0.4 moles) of maleic anhydride powder, stir and dissolve, continue stirring for 15 minutes, add 14.64 grams (0.04 moles) of 2,2-bis(3-amino-4 -Hydroxyphenyl) hexafluoropropane, after stirring and dissolving, add 109.2 grams (0.21 moles) of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propanedianhydride powder, stir at room temperature React for 2 hours, add 820 ml of toluene, heat up to 130°C, reflux and divide water for 5 hours to obtain a maleimide-based polyimide resin solution, adjust the solid content to make it in the range of 10%-15% Inside, denoted as MHPIS-51.

Embodiment 3

[0032] According to the weight ratio of 100:80:100:15, MHPIS-15 maleimide-based polyimide resin solution, N,N,N',N',O-pentaglycidyl-4,4'- Add diamino-4"-hydroxytriphenylmethane, N,N,N',N'-tetraglycidyl-4,4'-diaminodiphenylmethane and 2-ethyl-4-methylimidazole to the reactor , stir and mix evenly at room temperature to obtain a polyimide-epoxy electrical insulating varnish, which is designated as MHPIG-151.

[0033] According to the weight ratio of 100:80:80:10, MHPIS-15 maleimide-based polyimide resin solution, N,N,N',N',O-pentaglycidyl-4,4'- Add diamino-4"-hydroxytriphenylmethane, N,N,N',N'-tetraglycidyl-4,4'-diaminodiphenylmethane and 2-ethyl-4-methylimidazole to the reactor , stir and mix evenly at room temperature to obtain a polyimide-epoxy electrical insulating varnish, which is designated as MHPIG-152.

[0034] According to the weight ratio of 100:100:100:30, MHPIS-51 maleimide-based polyimide resin solution, N,N,N',N',O-pentaglycidyl-4,4'- Add diamino-4"-hydroxytrip...

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Abstract

The invention relates to a polyimide-epoxy type electrical insulating paint and a preparation method thereof. The polyimide-epoxy type electrical insulating paint comprises the components: a maleimide polyimide resin solution, N, N, N', N', O-5-penta-glycidyl-4,4'-diamido-4''-hydroxyl triphenylmethane, N, N, N', N'-4-tetra-glycidyl-4,4'-diamido-diphenyl methane and 2-ethyl-4- methylimidazole which have the weight ratio of 100: (80-100): (80-100):(10-30). The preparation method comprises the steps of: evenly stirring and mixing all the components at the room temperature to obtain the paint. The polyimide-epoxy type electrical insulating paint is moderate in viscosity, good in using technological efficiency, excellent in adhesive property for metal base materials (such as iron, copper, aluminium alloy, glass and ceramics), simple in preparation technology and convenient in operation and reaction raw material source; and the preparation process can be completed in general equipment and is beneficial to realization of industrial production.

Description

technical field [0001] The invention belongs to the field of electrical insulating varnish and its preparation, in particular to a polyimide-epoxy electrical insulating varnish and its preparation method. Background technique [0002] With the development of aerospace, electronic and electrical industries and the improvement of electrical and electrical technology, there is a demand for high-temperature-resistant electrical insulation materials, including electrical insulation boards, electrical insulation tapes (such as mica tapes, etc.), impregnated insulating varnishes, and electromagnetic wire varnishes. Increasingly, as the main varieties of high temperature resistant electrical insulating paint, polyamide-imide paint, polyimide paint, polyesterimide paint, silicone paint, silicone-epoxy paint, polyimide- The demand for epoxy paint, etc. is also increasing. [0003] Polyimide varnish is a kind of high-temperature-resistant electrical insulating varnish with excellent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/25
Inventor 虞鑫海陈梅芳章峰
Owner DONGHUA UNIV
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