CN102757711A - High-temperature impregnating varnish for aviation electrical appliance as well as preparation and impregnation methods of high-temperature impregnating varnish - Google Patents
High-temperature impregnating varnish for aviation electrical appliance as well as preparation and impregnation methods of high-temperature impregnating varnish Download PDFInfo
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- CN102757711A CN102757711A CN2012102131569A CN201210213156A CN102757711A CN 102757711 A CN102757711 A CN 102757711A CN 2012102131569 A CN2012102131569 A CN 2012102131569A CN 201210213156 A CN201210213156 A CN 201210213156A CN 102757711 A CN102757711 A CN 102757711A
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Abstract
The invention belongs to the insulating treatment technology of motors and electrical appliances and relates to a high-temperature impregnating varnish for an aviation electrical appliance as well as improvements on preparation and impregnation methods. The high-temperature impregnating varnish comprises the following components in parts by mass: 100 parts of aliphatic epoxy resin, 100-130 parts of methylnadic anhydride and 1-4 parts of accelerator. The preparation method of the high-temperature impregnating varnish comprises the following steps of: preparing a choline chloride solution or an acetylcholine chloride solution; and mixing. The impregnation method comprises the following steps of: removing bubbles in advance; vacuum impregnating; wiping a residual paint; and curing. The invention provides the high-temperature impregnating varnish for the aviation electrical appliance which has good insulation performance without environmental pollution as well as the preparation and impregnation methods of the high-temperature impregnating varnish, so that the environmental pollution is avoided, and the insulation performance is improved.
Description
Technical field
The invention belongs to the insulation processing technology of motor and electrical equipment, relate to improvement air appliance impregnating varnish and preparation and dipping method.
Summary of the invention
China adopts insullac to carry out insulation processing for aviation with air appliances such as high-temperature electric machine line bag, coil blocks at present.Its shortcoming is: high-temperature insulating paint is diphenyl ether and polyimide usually; Contain high amounts of solvents in this type of insullac, in dipping and solidification process, volatilize in a large number, cause environmental pollution and operator's murder by poisoning; And stay micropore in the paint film easily, influence insulating property.Occurred afterwards adding the few solvent formula system of vinylbenzene as reactive monomer and thinner, flooding and solidification process also has cinnamic volatilization, cause environmental pollution and to operator's murder by poisoning.In fact, they all are not solvent-free paints truly.Relevant for the public reported of the solvent-free immersion paint of fire resistant epoxy, anhydride system, still, its prescription, preparation method and dipping method all are in confidential state in the world.
Summary of the invention
The objective of the invention is: the air appliance that proposes a kind of non-environmental-pollution, good insulation preformance to avoid environmental pollution, improves insulating property with high temperature impregnating varnish and preparation and dipping method.
Technical scheme of the present invention is: air appliance is used the high temperature impregnating varnish, it is characterized in that, the mass percent of its component is following: aliphatic epoxy resin: 100 parts, and the methyl carbic anhydride: 100 parts～130 parts, promotor: 1 part～4 parts; Promotor is one of following substances: Bian Ji n n dimetylaniline, chromium acetylacetonate, three-(dimethylamino methyl) phenol, choline chloride solution or Ovisot solution; The purity of above-mentioned substance is not less than technical pure.
Prepare the method for high temperature impregnating varnish as described above, it is characterized in that:
1, choline chloride solution or Ovisot formulations prepared from solutions:
1.1, when selecting choline chloride 60 for use as promotor; Ratio according to choline chloride 60: absolute ethyl alcohol=1:3～4 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
1.2, when selecting Ovisot for use as promotor; Ratio according to Ovisot: absolute ethyl alcohol=1:1～2 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
2, mix: aliphatic epoxy resin that will take by weighing in proportion and methyl carbic anhydride are put into container, add promotor then in proportion, and manual the stirring is no less than 2min, preserves subsequent use.
Use the method for high temperature impregnating varnish dipping air appliance as described above, it is characterized in that:
1, preheating baking moisture: the air appliance that will flood places baking oven preheating under 100 ℃～120 ℃ temperature, insulation 1h～2h;
2, remove bubble in advance: the high temperature impregnating varnish is put into vacuum apparatus get rid of bubble, vacuum tightness＜60Pa, the dwell time is 10min～30min;
3, dipping: air appliance is immersed in the impregnating varnish, is put into and gets rid of bubble in the vacuum apparatus, vacuum tightness＜50Pa, the dwell time is 15min～120min;
4, wipe surplus lacquer: air appliance is placed place 10min～60min on the medicated napkin, siphon away surplus lacquer, wipe surperficial surplus lacquer with medicated napkin again, with acetone absorbent cotton or silk are dripped tide at last, surperficial with absorbent cotton that drips tide or silk again with the wiping air appliance;
5, solidify: air appliance is placed baking oven, under 110 ℃～130 ℃ temperature, be incubated 3h～6h, under 180 ℃～200 ℃ temperature, be incubated 3h～6h then.
Advantage of the present invention is: the air appliance that has proposed a kind of non-environmental-pollution, good insulation preformance has been avoided environmental pollution with high temperature impregnating varnish and preparation and dipping method, has improved insulating property.
Embodiment
Explain further details in the face of the present invention down.Air appliance is used the high temperature impregnating varnish, it is characterized in that, the mass percent of its component is following: aliphatic epoxy resin: 100 parts, and the methyl carbic anhydride: 100 parts～130 parts, promotor: 1 part～4 parts; Promotor is one of following substances: Bian Ji n n dimetylaniline, chromium acetylacetonate, three-(dimethylamino methyl) phenol, choline chloride solution or Ovisot solution; The purity of above-mentioned substance is not less than technical pure.
Prepare the method for high temperature impregnating varnish as described above, it is characterized in that:
1, choline chloride solution or Ovisot formulations prepared from solutions:
1.1, when selecting choline chloride 60 for use as promotor; Ratio according to choline chloride 60: absolute ethyl alcohol=1:3～4 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
1.2, when selecting Ovisot for use as promotor; Ratio according to Ovisot: absolute ethyl alcohol=1:1～2 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
2, mix: aliphatic epoxy resin that will take by weighing in proportion and methyl carbic anhydride are put into container, add promotor then in proportion, and manual the stirring is no less than 2min, preserves subsequent use.
Use the method for high temperature impregnating varnish dipping air appliance as described above, it is characterized in that:
1, preheating baking moisture: the air appliance that will flood places baking oven preheating under 100 ℃～120 ℃ temperature, insulation 1h～2h;
2, remove bubble in advance: the high temperature impregnating varnish is put into vacuum apparatus get rid of bubble, vacuum tightness＜60Pa, the dwell time is 10min～30min;
3, dipping: air appliance is immersed in the impregnating varnish, is put into and gets rid of bubble in the vacuum apparatus, vacuum tightness＜50Pa, the dwell time is 15min～120min;
4, wipe surplus lacquer: air appliance is placed place 10min～60min on the medicated napkin, siphon away surplus lacquer, wipe surperficial surplus lacquer with medicated napkin again, with acetone absorbent cotton or silk are dripped tide at last, surperficial with absorbent cotton that drips tide or silk again with the wiping air appliance;
5, solidify: air appliance is placed baking oven, under 110 ℃～130 ℃ temperature, be incubated 3h～6h, under 180 ℃～200 ℃ temperature, be incubated 3h～6h then.
Principle of work of the present invention is: select for use aliphatic epoxy resin as base resin, compare the advantage that traditional bisphenol A epoxide resin has two aspects: the one, and viscosity is low, need not to add thinner and reduces system viscosity, satisfies solvent-free requirement; The 2nd, there is not unsaturated link(age) in the molecular structure, Stability Analysis of Structures, thermotolerance and good electric property.Select for use the methyl carbic anhydride as solidifying agent, compare traditional methyl tetrahydro phthalic anhydride class, molecular structure is more stable, thermotolerance and good electric property.Add a certain amount of promotor in the prescription again, to regulate gelation time.The composition that contains any solvent in the prescription has hardly been avoided environmental pollution and has been solidified the micropore that stays easily in the paint film of back, has improved insulating property.
Instance 1: brushless machine line bag vacuum impregnation:
Promotor preparation: Ovisot: absolute ethyl alcohol: 1:1, mixing condition: 280r/min, 1.5h;
The impregnating varnish prescription:
Aliphatic epoxy resin: methyl carbic anhydride: promotor=100:120:4;
Vacuum impregnation condition: vacuum tightness 5Pa～45Pa, 40min;
Solidify: 120 ℃ * 6h+190 ℃ * 5h.
Instance 2: coil vacuum impregnation:
Promotor preparation: choline chloride 60: absolute ethyl alcohol: 1:4, mixing condition: 260r/min, 1h;
The impregnating varnish prescription:
Aliphatic epoxy resin: methyl Na Dike phthalic anhydride: promotor=100:120:3
Vacuum impregnation condition: vacuum tightness 4Pa～47Pa, 30min;
Solidify: 120 ℃ * 5h+180 ℃ * 4h.
Instance 3: angular displacement sensor vacuum impregnation:
Impregnating varnish prescription: aliphatic epoxy resin: methyl carbic anhydride: BDMA=100:110:3;
Vacuum impregnation condition: vacuum tightness 15Pa～48Pa, 15min;
Solidify: 120 ℃ * 6h+180 ℃ * 3h.
Above product is found through debugging, test and the final back of using; This insullac has increased the normality of machine winding and electric apparatus coil and hot and humid electrical insulation capability and physical strength, has improved thermal conductivity, reduces electric machine temperature rise; Solvent-free, the diluent free of while impregnating varnish; Solids content＞95%, the nontoxic odorlessness of bake process, environmentally safe.200 ℃ of long term operations, 220 ℃ of short-terms have satisfied design requirements.
Claims (3)
1. air appliance is used the high temperature impregnating varnish, it is characterized in that, the mass percent of its component is following: aliphatic epoxy resin: 100 parts, and the methyl carbic anhydride: 100 parts～130 parts, promotor: 1 part～4 parts; Promotor is one of following substances: Bian Ji n n dimetylaniline, chromium acetylacetonate, three-(dimethylamino methyl) phenol, choline chloride solution or Ovisot solution; The purity of above-mentioned substance is not less than technical pure.
2. prepare the method for high temperature impregnating varnish as claimed in claim 1, it is characterized in that:
2.1, choline chloride solution or Ovisot formulations prepared from solutions:
2.1.1, when selecting choline chloride 60 for use as promotor; Ratio according to choline chloride 60: absolute ethyl alcohol=1:3～4 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
2.1.2, when selecting Ovisot for use as promotor; Ratio according to Ovisot: absolute ethyl alcohol=1:1～2 takes by weighing raw material; Then above-mentioned raw materials being put into the reaction kettle that has stirring mechanism stirs; The stirrer rotating speed is 200r/min～300r/min, pours out behind stirring 1h～2h, and it is subsequent use to bottle;
2.2, mix: the aliphatic epoxy resin that will take by weighing in proportion and methyl carbic anhydride are put into container, add promotor then in proportion, and manual stirring is no less than 2min, preserves subsequent use.
3. use the method for high temperature impregnating varnish dipping air appliance as claimed in claim 1, it is characterized in that:
3.1, preheating baking moisture: the air appliance that will flood places baking oven preheating under 100 ℃～120 ℃ temperature, is incubated 1h～2h;
3.2, remove bubble in advance: the high temperature impregnating varnish is put into vacuum apparatus gets rid of bubble, vacuum tightness＜60Pa, the dwell time is 10min～30min;
3.3, the dipping: air appliance is immersed in the impregnating varnish, is put into and gets rid of bubble in the vacuum apparatus, vacuum tightness＜50Pa, the dwell time is 15min～120min;
3.4, wipe surplus lacquer: air appliance is placed places 10min～60min on the medicated napkin, siphon away surplus lacquer, wipe surperficial surplus lacquer with medicated napkin again, with acetone absorbent cotton or silk are dripped tide at last, surperficial with absorbent cotton that drips tide or silk again with the wiping air appliance;
3.5, solidify: air appliance is placed baking oven, under 110 ℃～130 ℃ temperature, is incubated 3h～6h, under 180 ℃～200 ℃ temperature, be incubated 3h～6h then.
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| CN2012102131569A CN102757711A (en) | 2012-06-26 | 2012-06-26 | High-temperature impregnating varnish for aviation electrical appliance as well as preparation and impregnation methods of high-temperature impregnating varnish |
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| CN2012102131569A CN102757711A (en) | 2012-06-26 | 2012-06-26 | High-temperature impregnating varnish for aviation electrical appliance as well as preparation and impregnation methods of high-temperature impregnating varnish |
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Cited By (5)
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| CN103525147A (en) * | 2013-10-25 | 2014-01-22 | 安徽文峰电子科技集团有限公司 | Composite impregnating varnish as well as preparation method thereof |
| CN103555136A (en) * | 2013-10-25 | 2014-02-05 | 安徽文峰电子科技集团有限公司 | Epoxy impregnating varnish and preparation method thereof |
| CN104356861A (en) * | 2014-11-10 | 2015-02-18 | 兴化市兴成铜业有限公司 | Composition for inner laminated insulating film of screening can and screening can inner laminating method |
| CN104868666A (en) * | 2015-04-30 | 2015-08-26 | 株洲南车机电科技有限公司 | Primary insulation processing method for linear motor for rail traffic vehicle |
| CN116285217A (en) * | 2022-09-23 | 2023-06-23 | 丹阳市沃德立电工材料有限公司 | High-performance environment-friendly high-temperature-resistant impregnating resin and preparation method thereof |
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| CN101699586A (en) * | 2009-10-22 | 2010-04-28 | 四川泛华航空仪表电器厂 | Insulated impregnating process for high-frequency transformers |
| CN101921529A (en) * | 2010-08-18 | 2010-12-22 | 东华大学 | Heat-resistant solvent-free immersion paint and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103525147A (en) * | 2013-10-25 | 2014-01-22 | 安徽文峰电子科技集团有限公司 | Composite impregnating varnish as well as preparation method thereof |
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| CN104356861A (en) * | 2014-11-10 | 2015-02-18 | 兴化市兴成铜业有限公司 | Composition for inner laminated insulating film of screening can and screening can inner laminating method |
| CN104868666A (en) * | 2015-04-30 | 2015-08-26 | 株洲南车机电科技有限公司 | Primary insulation processing method for linear motor for rail traffic vehicle |
| CN104868666B (en) * | 2015-04-30 | 2018-01-09 | 株洲南车机电科技有限公司 | A kind of insulating treatment method for rail traffic vehicles linear electric motor primary |
| CN116285217A (en) * | 2022-09-23 | 2023-06-23 | 丹阳市沃德立电工材料有限公司 | High-performance environment-friendly high-temperature-resistant impregnating resin and preparation method thereof |
| CN116285217B (en) * | 2022-09-23 | 2024-02-20 | 丹阳市沃德立电工材料有限公司 | High-performance environment-friendly high-temperature-resistant impregnating resin and preparation method thereof |
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Application publication date: 20121031 |