Solvent-free impregnating varnish and preparation method thereof
A technology of solvent-free dipping paint and film-forming agent, which is applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve the problems of insufficient temperature resistance and toughness, and achieve good moisture resistance, high adhesion, Good electrical insulation performance
Inactive Publication Date: 2013-11-06
马鞍山采石矶涂料有限公司
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AI Technical Summary
Problems solved by technology
However, the temperature resistance grade and toughness of the cured product of this system are insufficient, so it is necessary to modify the epoxy anhydride impregnation paint system, and the cured product of the impregnation paint system can meet the requirements of temperature resistance grade and mechanical properties at the same time
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] A solvent-free dipping varnish made from the following raw materials (kg) in parts by weight:
[0014] Unsaturated polyester resin 60, aniline formaldehyde resin 26, E-12 epoxy resin 12, sodium benzoate 2, catechol 1, maleic anhydride 8, propylene glycol 12, aluminum nitride 8, silicon carbide 2, tert-butyl Hydrogen peroxide 2, acrylonitrile 3, isoprene 7, zinc cyanurate 2, zinc oxide 2, ditetradecyl alcohol ester 4, film former 5.
[0015] The film-forming agent is made of the following raw materials in parts by weight: silane coupling agent KH550 4, 582-2 amino resin 16, polyisobutylene 4, cobalt naphthenate 2, isopropyl distearoyloxyaluminate Ester 2, ditetradecyl alcohol ester 5, aluminum nitride 2, nano attapulgite 2, epoxy soybean oil 4, morpholine 2;
[0016] The preparation method is as follows: mixing various materials, heating to 105-110 DEG C, stirring and reacting for 2-3 hours, and grinding to remove slag.
[0017] The preparation method of solvent-free d...
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Abstract
A solvent-free impregnating varnish and a preparation method thereof are disclosed. The varnish is characterized by being composed of following raw materials in parts by weight: 55 to 60 parts of unsaturated polyester resin, 23 to 26 parts of aniline formaldehyde resin, 12 to 14 parts of E-12 epoxy resin, 1 to 2 parts of sodium benzoate, 1 to 2 parts of catechol, 6 to 8 parts of maleic anhydride, 10 to 12 parts of propylene glycol, 6 to 8 parts of aluminium nitride, 1 to 2 parts of silicon carbide, 2 to 3 parts of tert-butyl hydroperoxide, 3 to 4 parts of acrylonitrile, 6 to 7 parts of isoprene, 1 to 2 parts of cyanuric acid zinc, 1 to 2 parts of zinc oxide, 3 to 4 parts of double tetradecene alcohol ester, and 4 to 5 parts of film forming agent. The solvent-free impregnating varnish has the advantages of excellent electrical performance, high mechanic strength, good damp resistance, low curing temperature, high cohesiveness, and good storage stability.
Description
technical field [0001] The invention belongs to the field of insulating materials, and relates to an impregnating varnish, in particular to a solvent-free impregnating varnish and a preparation method thereof. Background technique [0002] Pressure impregnation is generally used in the production of motors, transformers, and wires. The workpiece is pre-baked to remove moisture and then cooled, placed in a vacuum environment to remove internal air and volatiles, relying on the gravity of the paint liquid in the vacuum and applying a certain pressure to make the paint liquid quickly penetrate and fill the inner layer of the insulating structure. This process produces a continuous, dense, pinhole-free paint film. [0003] The existing impregnating paint is made of epoxy resin as the main resin and acid anhydride as the curing agent. However, the temperature resistance grade and toughness of the cured product of this system are insufficient, and the epoxy anhydride impregnatio...
Claims
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IPC IPC(8): C09D167/06C09D161/22C09D161/20C09D163/02C09D135/00C09D7/12C09D5/25C08F222/06C08F236/12C08F220/44
Inventor 曹忠富
Owner 马鞍山采石矶涂料有限公司