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.
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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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