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Active phthalimide epoxy solvent-free dripping impregnating varnish and preparation method thereof

A phthalimide epoxy type and phthalimide technology, which is applied in the field of solvent-free dripping paint and its preparation, can solve the problems of inability to repeat tests or verify performance, undisclosed components or chemical structures, etc., and achieve low cost , The effect of continuous and dense paint film and less pinholes

Inactive Publication Date: 2010-12-22
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its specific composition or chemical structure is not disclosed, and it is impossible for even those skilled in the art to conduct repeated tests or verify its performance.

Method used

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  • Active phthalimide epoxy solvent-free dripping impregnating varnish and preparation method thereof
  • Active phthalimide epoxy solvent-free dripping impregnating varnish and preparation method thereof
  • Active phthalimide epoxy solvent-free dripping impregnating varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Under a nitrogen atmosphere, a strong electrode of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane dibasic primary amine and 1120 grams of N,N-dimethylformamide was mixed with 366.3 grams (1.0 mole). Add 192.0 g (1.0 mol) of trimellitic anhydride powder after stirring and dissolving at room temperature, stir and react at room temperature for 2 hours, add 448 g of toluene, heat to reflux state, azeotropically divide water and stir After reacting for 3 hours, separate the toluene, add 2240 g of ethanol, stir at high speed, precipitate solid powder, filter and dry to obtain 538.7 g of active phthalimide with a yield of 99.7%.

[0052] Get 150.0 grams of the above active phthalimide, 150.0 grams of N, N, N', N'-tetraglycidyl-4,4'-diaminodiphenylmethane (YAG80, epoxy value 0.81) and 200.0 grams of bis Epoxy resin of phenol A diglycidyl ether (E-51, epoxy value 0.51), active toughening agent of 10.0 grams of amino-terminated polyetherimide and 15.0 grams of carboxyl-termin...

Embodiment 2

[0062] Under a nitrogen atmosphere, 180.0 grams (0.9 moles) of 4,4'-diaminodiphenyl ether and 21.6 grams (0.1 moles) of 3,3'-diamino-4,4'-dihydroxybiphenyl dibasic primary amines And 1180 grams of N, the strong polar aprotic organic solvent of N-dimethylacetamide is added in the reaction kettle, after stirring and dissolving at room temperature, add the trimellitic anhydride powder of 192.0 grams (1.0 mole), after stirring and reacting at room temperature for 2 hours, add 472 grams of toluene, heated to reflux state, azeotropic water separation and stirring reaction for 3 hours, then separated toluene, added 2360 grams of ethanol, stirred at a high speed, precipitated solid powder, filtered, dried to obtain 374.8 grams of active phthalimide , the yield was 99.8%.

[0063] Get 100.0 grams of the above active phthalimide, 100.0 grams of N, N, N', N'-tetraglycidyl-4,4'-diaminodiphenylmethane (YAG80, epoxy value 0.81), 150.0 grams of N , N, O-triglycidyl-4-aminophenol (APG-90, ep...

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Abstract

The invention relates to an active phthalimide epoxy solvent-free dripping impregnating varnish and a preparation method thereof. The varnish has the following components: 10wt%-15wt% of active phthalimide, 35wt%-45wt% of epoxy resin, 5wt%-10wt% of active toughening agent, 5wt%-10wt% of curing agent, 20wt%-45wt% of active diluent. The preparation method comprises the preparation of the active phthalimide and the solvent-free dripping impregnating varnish. The preparation features simple process and low cost and contributes to the realization of industrialized production; in addition, the solvent-free dripping impregnating varnish enjoys excellent comprehensive property, fine manufacturability and cohesiveness, excellent heat resistance and hydrophobicity, thus enjoying bright application prospect in fields such as motors of electric tools, small electric machine and the like.

Description

technical field [0001] The invention belongs to the field of solvent-free dripping varnish and its preparation, in particular to an active phthalimide epoxy type solvent-free dripping varnish and a preparation method thereof. Background technique [0002] Solvent-free paint dripping is a new motor insulation treatment technology. Compared with ordinary immersion technology, it can significantly increase the amount of paint hanging on the motor windings, reduce the temperature rise of the motor, greatly shorten the dipping and drying cycle, and reduce the performance of insulation treatment. In recent years, it has been widely used in the production of small motors, micro-holding motors, electric tools, and household appliance motors. In the development of drip immersion technology, different methods such as vertical drip immersion, inclined drip immersion and horizontal drip immersion have appeared. In the initial stage, vertical dripping and inclined dripping are the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D163/02C09D163/04C09D7/12
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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