EP0880785A1 - Verfahren zur imprägnierung von elektrisch leitenden substraten - Google Patents

Verfahren zur imprägnierung von elektrisch leitenden substraten

Info

Publication number
EP0880785A1
EP0880785A1 EP96934760A EP96934760A EP0880785A1 EP 0880785 A1 EP0880785 A1 EP 0880785A1 EP 96934760 A EP96934760 A EP 96934760A EP 96934760 A EP96934760 A EP 96934760A EP 0880785 A1 EP0880785 A1 EP 0880785A1
Authority
EP
European Patent Office
Prior art keywords
impregnation
resin
resin system
temperature
comonomer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96934760A
Other languages
German (de)
English (en)
French (fr)
Inventor
Günter HEGEMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SI Group Inc
Original Assignee
Dr Beck & Co AG
Beck & Co AG Dr
Dr Beck & Co AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Beck & Co AG, Beck & Co AG Dr, Dr Beck & Co AG filed Critical Dr Beck & Co AG
Publication of EP0880785A1 publication Critical patent/EP0880785A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
    • H01B3/306—Polyimides or polyesterimides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins

Definitions

  • the process according to the invention for impregnating substrates comprises impregnating the substrate with a plastic, partially, crystalline or crystalline resin system A) which is highly viscous at room temperature, which is low-viscosity and liquid at the application temperature and which can be hardened by free radicals to form thermosets is.
  • the windings of electrical machines are usually impregnated by impregnation.
  • the purpose of this impregnation is to mechanically consolidate the
  • thermosets This impregnation is usually carried out using lacquers or resins which harden to form thermosets. Because on the one hand The requirements for the long-term thermal stability of these thermosets are very high, and on the other hand, the above-mentioned properties, in particular the electrical insulation, must also exist, there are a number of paints and resins that are tailored to the specific areas of application.
  • the unsaturated polyester resins have conquered a large space because they have considerable advantages over other thermosetting resin systems. It is thus possible to meet the required properties to a large extent by tailoring the unsaturated polyester resins to molecular dimensions, such as, for example, the selection of specific monomer units or the setting of specific molecular weights. Furthermore, the reactivity of the unsaturated polyester resins can be influenced in such a way that short and therefore inexpensive manufacturing processes for windings of electrical machines are possible.
  • the unsaturated polyester resins, in particular the unsaturated polyester imide resins have outstanding properties, particularly with regard to the requirement for long-term thermal resistance.
  • the unsaturated polyester resins are composed on the one hand of base resins consisting, for example, of alpha, beta-unsaturated dicarboxylic acids, further modifying mono-, di- and / or polycarboxylic acids, di- and / or polyols and in the case of Polyesterimde from building blocks containing hydroxyl and carboxyl groups, and also from comonomers which react with the alpha, beta-unsaturated dicarboxylic acid units of the base resin and can lead to thermosets.
  • base resins consisting, for example, of alpha, beta-unsaturated dicarboxylic acids, further modifying mono-, di- and / or polycarboxylic acids, di- and / or polyols and in the case of Polyesterimde from building blocks containing hydroxyl and carboxyl groups, and also from comonomers which react with the alpha, beta-unsaturated dicarboxylic acid units of the base resin and can lead to thermosets.
  • the preferred comonomer is styrene, which, because of its good dissolving properties, is also used to adjust the processing viscosity.
  • the comonomers mentioned are completely copolymerized during curing under suitable conditions.
  • Such a solvent-free system is referred to as an impregnating resin.
  • the impregnating lacquers the vapor pressures of the comonomers at the application temperature lead to evaporation losses, which, however, are generally lower than with solvent-containing systems (50%, based on the amount of solvent used, evaporation loss with solvent-containing impregnating lacquers, 10 to 30% evaporation loss with impregnating resins).
  • comonomers usually used are not suitable for solving these tasks, since the comonomers must be in the liquid state for reasons of the processability of the resins.
  • Such comonomers such as vinyl or allyl compounds, have liquids at room temperature and in particular Processing and curing temperatures to considerable vapor pressures, which lead to considerable evaporation losses in the comonomers.
  • Suitable comonomers are thus solid or highly viscous at room temperature, as are the resins themselves, which are present in a highly viscous, plastic, partially crystalline or crystalline state at room temperature.
  • the objects must be impregnated at temperatures at which the resins or the mixtures of resins and comonomers are present in the low-viscosity and / or in the molten state.
  • molten resin systems in electrical insulation technology is state of the art. Such molten resin systems are used as solvent-free wire enamels, extrudable cable compounds, hot-melt adhesives or coating compounds.
  • the use of radically curing systems is the exception, since the processability of such highly reactive systems is very limited due to the unacceptably short pot life (time in which the resin is in the processable state).
  • a further object of the present invention was therefore to achieve a stabilization of the resin systems used at elevated application temperatures, without excessively long curing times and excessive curing temperatures, at which decomposition phenomena in the resins and damage to the materials to be impregnated can occur.
  • JP-A-53 05 97 91 describes polyesterimide resins with at least trihydric carboxylic acids and polyester polyols as monomer units, which are prepared with amines and other proportions of at least trihydric carboxylic acids.
  • Such polyesterimide resins are used in molten form as an insulating coating for electrically conductive substrates. The coatings have good electrical and mechanical properties. No toxic vapors are released during the coating process.
  • DE-A-26 48 351 and DE-A-26 48 352 comprise injection-moldable resin compositions which consist of 10 to 50% by weight of unsaturated polyester resin, 0.2 to 2% by weight of organic peroxide and also inert Filler exist.
  • the unsaturated polyesters are composed of the building blocks polyol, ethylenically unsaturated dicarboxylic acid and saturated dicarboxylic acid.
  • Resin compositions of this type are used for electrical or electronic components, such as insulators, housings for low and medium voltage switches, cable insulations and plugs.
  • DE-A-16 40 428 describes the use of annular bodies made of unsaturated polyester resins, which are coated with waxes to improve the blocking resistance. These annular bodies are used for the impregnation of windings in such a way that they are placed on a winding head of the winding. When heated, the unsaturated polyester resin melts, penetrates into the winding and is cured there.
  • a resin system A) is used as the impregnating resin, comprising: AI) a radical-curable thermosetting resin, A2) at least one suitable hardener and, if appropriate, accelerator, A3) optionally further comonomers and / or further polymers with ethylenically unsaturated radical-polymerizable groups, the vapor pressure of A3) being impregnated and Curing temperature is low, and A4) optionally other conventional additives,
  • the resin system A) is highly viscous, plastic, partially crystalline or crystalline at room temperature and wherein the resin system A) is converted into the low-viscosity liquid state during the impregnation process by increasing the temperature to the impregnation temperature, so that impregnation according to the known processes of Dip soaking, flooding, dip rolling, trickling or pouring, if necessary with the support of the impregnation by applying a vacuum.
  • the resin component AI is preferably selected from the group of unsaturated polyesters, unsaturated polyesterimides, bismaleimides, oligomeric diallyl phthalates, comonomer-free vinyl esters, comonomer-free vinyl ethers, comonomer-free vinyl urethanes and / or polybutadiene resins on their own or in combinations with one another.
  • the resin component AI) is particularly preferably selected from the group of unsaturated polyesters, unsaturated polyester imides and bismaleimides in combination with the resin component A3) selected from the group of oligomeric diallyl phthalates, divinylethylene urea, divinyl propylene urea, N-vinyl carbazole, N-vinyl pyrrolidone, comonomer-free vinyl esters, comonomer-free vinyl ethers, comonomer-free vinyl urethanes, vinyl- and / or allyl group-containing polyesters or mixtures thereof.
  • Hardeners A2) which are preferably used are radical-forming peroxides, in particular organic peroxides, and / or compounds which form radicals by cleaving a carbon-carbon bond.
  • the resin systems A) are particularly preferably delivered in the activated state as one-component resins, in special cases the activation can also take place immediately before the impregnation using suitable mixing metering devices.
  • the substrates to be impregnated are preferably preheated to a temperature equal to or greater than the impregnation temperature before the impregnation.
  • the substrates to be impregnated are preheated, for example, by means of electrical heat, induction heating, microwave radiation or infrared radiation.
  • the substrates are preferably impregnated by dipping, flooding, dipping rolling, trickling or pouring, the impregnation being carried out in a vacuum in which the components AI) to A4) still have a negligibly low vapor pressure.
  • the substrate can remain immersed until the resin system A) has gelated in the substrate.
  • the resin systems After impregnation with the resin systems, the resin systems are cured at a temperature which is above the temperature of the resin melt and which is generated, for example, by means of heat, induction heating, microwave radiation, infrared radiation or a conventional heating furnace passage, where appropriate surface drying is supported by the action of high-energy radiation, such as UV or electron radiation.
  • high-energy radiation such as UV or electron radiation.
  • unsaturated polyester resins which may contain building blocks containing imide groups, bismaleimide resins, oligomeric diallyl phthalates, comonomer-free vinyl esters, comonomer-free vinyl ethers, comonomer-free vinyl urethanes and / or polybutadiene resins.
  • Unsaturated polyester resins are known. Unsaturated polyester resins containing imide groups are described, for example, in DE-A-15 70 273, DE-A-17 20 323 and DE-A-24 60 768.
  • building blocks of the unsaturated polyester resins are, for example: polyols containing polymerizable double bonds, such as glycerol monoallyl ether, trimethylolpropane monoallyl ether and pentaerythritol mono- and diallyl ether, and polymerizable double bonds containing polycarboxylic acids or their anhydrides, such as fumaric acid, such as fumaric acid, such as fumaric acid, such as fumaric acid, such as fumaric acid, such as fumaric acid and preferably maleic acid or maleic anhydride and monocarboxylic acids containing polymerizable double bonds, such as, for example, acrylic and / or methacrylic acid.
  • polyols containing polymerizable double bonds such as glycerol monoallyl ether, trimethylolpropane monoallyl ether and pentaerythritol mono- and diallyl ether
  • polycarboxylic acids or their anhydrides such as fumaric
  • a part of the unsaturated dicarboxylic acid can be replaced by saturated dicarboxylic acids such as adipic acid, perhydrogenated isophthalic acid, phthalic acid, phthalic anhydride and / or dimerized fatty acids to modify the properties of the unsaturated polyester resins .
  • saturated dicarboxylic acids such as adipic acid, perhydrogenated isophthalic acid, phthalic acid, phthalic anhydride and / or dimerized fatty acids to modify the properties of the unsaturated polyester resins .
  • Suitable components A3) copolymerizable with the unsaturated polyesters or imide group-containing polyesters AI) are, for example: diallyl phthalate prepolymers, divinylethylene urea, divinyl propylene urea, N-vinyl carbazole, N-vinyl pyrrolidone, comonomer-free vinyl esters, comonomer-free vinyl ethers, co-monomer-free vinyl urethanes and polyesters that
  • Contain vinyl or allyl groups and which differ from AI) such as, for example, polyester composed of saturated and / or unsaturated polycarboxylic acids with pentaerythritol mono-, di- and / or triallyl ether and optionally modifying glycols
  • the copolymerizable components A3) have such low vapor pressures at the impregnation and curing temperatures that no significant immissions can take place.
  • Any low molecular weight bismaleimides can be used as bismaleimide component AI).
  • Bismaleinimides of the formula I are advantageously used
  • radical R1 denotes an aliphatic, cycloaliphatic, araliphatic or aromatic radical and the radicals mentioned optionally further functional groups, such as ether, ester, amide, carbamate, keto, sulfone or hydroxyl groups can have.
  • Rl is preferably a straight-chain alkylene radical having 2 to 20, in particular 2 to 10, carbon atoms or a 4,4'-diphenylmethane, 2,4-tolylene, 1,3- or 1,4-phenylene radical.
  • Suitable bismaleimides are, for example, ethylene bismaleimide, butylene bismaleimide, hexamethylene bismaleimide, 4,4'-diphenylmethane bismaleimide, 2,4, -tolylene bismaleimide and 1,3-phenylene bismaleimide or mixtures thereof.
  • Suitable components A3) copolymerizable with the bismaleimides AI) are, for example: oligomeric diallyl phthalates, divinyl ethylene urea, divinyl propylene urea, N-vinyl carbazole, comonomer-free vinyl esters, comonomer-free vinyl ethers, comonomer-free vinyl urethanes and polyesters which contain vinyl or allyl groups and which differ from AI), such as, for example, composed of saturated and / or unsaturated polycarboxylic acids with pentaerythritol mono-, di- and / or triallyl ether and optionally modifying glycols as monomer units.
  • the copoly At the impregnating and curing temperatures, merisable components A3) have such low vapor pressures that no significant immissions can take place.
  • component AI can be used alone or in a mixture with other components listed under AI): oligomeric diallyl phthalates, comonomer-free vinyl esters, comonomer-free vinyl ethers, comonomer-free vinyl urethanes and / or polybutadiene resins.
  • hardener A2 Depending on the resin system A, known peroxides with suitable decomposition temperatures or compounds which decompose thermally with the formation of carbon radicals can be used as hardener A2). If necessary, additional compounds are present that accelerate the decay of the radical formers. It is essential to the invention that the hardener A2) only produce a significant free-radical stream above the impregnation temperatures, which causes the resin system A) to harden.
  • peroxides A2) which only undergo significant decomposition into radicals above the impregnation temperature are commercially available organic peroxides, such as tert-butyl perbenzoate, tert-butyl perisononanoate or tert-butyl peroctoate, or peroxides in combination with accelerators , such as benzoyl peroxide in combination with tertiary amines or peresters with cobalt salts of organic acids.
  • hardeners A2) which decompose to form carbon radicals include benzopinacol, substituted succinic acid derivatives and preferably silyl ether-substituted ethylene glycols, as described, for example, in DE-A-26 32 294.
  • Such silyl ethers according to DE-A-26 32 294 sometimes decompose into radicals and only at higher temperatures are in some cases largely stable in the resin system A) to be polymerized, even at temperatures above 80 degrees C.
  • the resin systems A) can contain, as part of component A4), stabilizers known per se for compounds which can be polymerized by free radicals, such as, for example, quinones, hydroquinones, sterically hindered phenols and / or sterically hindered amines and nitroverts bonds.
  • stabilizers known per se for compounds which can be polymerized by free radicals such as, for example, quinones, hydroquinones, sterically hindered phenols and / or sterically hindered amines and nitroverts bonds.
  • processing aids for coating resins which are customary per se such as, for example, surface-active and surface-active substances for improving the flow and penetration, additives which influence viscosity, such as pyrogenic silica or bentonite, may be present as further constituents of component A4) which may be present. as well as mineral or organic fillers
  • the substrates for example the windings of electrical machines, are impregnated with the resin systems A) according to the invention, consisting of components AI), A2) and optionally A3) and A4), in the melt of A) at temperatures which are below the curing temperature.
  • the processing times of the resin systems A) are such that impregnation is possible using the methods of the prior art.
  • Such impregnation processes are, for example: - Soaking the substrate to be impregnated, which may be preheated, by immersing it in the melt of the resin system A), dwelling the substrate to be impregnated in the melt until the resin melt has reached all points to be impregnated, if necessary, until for gelling the resin that has penetrated into the substrate, dipping and dripping the impregnated substrate and then curing the absorbed resin system A), the heating of the object with current heat in the immersed state not having to be interrupted, so that heat conduction occurs Heat losses in the winding can be compensated for or the dwell time until any gelation under resin can be shortened by increasing the winding temperature during immersion,
  • Resin system A) is flooded in such a way that there is sufficient impregnation of the substrate, then draining the melt of resin system A) / if necessary until the resin which has penetrated into the substrate gels, allowing the substrate to drip off and then curing the debris Substrate-absorbed melt of the resin system A), the heating of the object with current heat in the immersed state does not have to be interrupted, so that heat losses occurring in the winding due to heat conduction can be compensated for or by increasing the winding temperature during immersion the dwell time until possible gels under resin can be shortened,
  • the optionally preheated substrate being rolled in such a way through the activated melt of the resin system A) that, in the case of windings of electrical machines as the substrate, only the winding and the part carrying the winding of the substrate are covered by the melt of the resin system A) until the winding has been adequately impregnated and then the melt absorbed by the substrate (from the winding) is cured, preferably with rotation, the object being heated with electricity during the rolling does not have to be interrupted, so that heat losses occurring in the winding due to heat conduction can be compensated for or the dwell time until any gelation under resin can be shortened by increasing the winding temperature during rolling.
  • the impregnation processes mentioned above can preferably be carried out in a vacuum or alternately between vacuum and overpressure.
  • the substrates can be preheated, for example, by means of electrical heat (heating by electrical resistance), induction heating, microwave or infrared heating and by passage through a conventional heating furnace.
  • the curing of the resin system A) adhering to the substrate after impregnation can take place, for example, as in the preheating of the substrates by means of current heating, induction heating, microwave or infrared heating, and by passage through a conventional heating oven, the curing being counter to the substrate surface ⁇ can also be supported by additional radiation, for example IR, UV or electron radiation.
  • An unsaturated polyesterimide AI) according to Example 2 of DE-C-24 60 768 from maleic anhydride, neopentyl glycol, trishydroxy isocyanurate and the reaction product of tetrahydrophthalic anhydride and monoethanolamine is with 10 wt .-%, based on the resin system A), diallyl phthalate oligomer A3 ) (Type Ftalidap 27, manufacturer Alusuisse) mixed in the melt. 2% by weight, based on the resin system A), of benzopanolsilyl ether (type initiator BK, manufacturer Bayer AG) are mixed in as hardener A2).
  • the resin system A) has an almost firm consistency at room temperature and a viscosity of 1300 mPas at 80 degrees C.
  • the pot life of the resin system A) is 210 minutes at 80 degrees C, the gelling time at 140 degrees C 27 minutes.
  • the stator of an electric motor which was preheated to 120 degrees C in the heating furnace, is slowly immersed in the molten resin system A) heated to 80 degrees C. The stator remains in the melted resin system A) until no more bubbles rise.
  • the stator is then slowly replaced, about 2 minutes are allowed to drip off and then the resin system A) is cured by heating in the oven at 160 ° C. for 30 minutes. After hardening, the winding of the stator is sufficiently solidified. After sawing up the winding, the stator shows sufficient impregnation.
  • the mass loss determined thermogravimetrically when heating in the TGA apparatus to 160 degrees C in 10 minutes and maintaining the temperature at 160 degrees C for 30 minutes is 3.4% by weight, based on the resin system A) .
  • the unsaturated polyester ester imide AI) according to Example 1 is mixed with a polyester A3), which was prepared from 2 moles of pentaerythritol triallyl ether, 4 moles of adipic acid and 3 moles of pentaerythritol diallyl ether by melt condensation, in a ratio of 2: 1 and with 2% by weight to the resin system A), mixed according to Example 1.
  • the mixture has a plastic consistency at room temperature and a viscosity of 570 mPas at 100 degrees Celsius.
  • the pot life of resin system A) with 1% by weight, based on resin system A), of tert-butyl perbenzoate as additional hardener component A2) is 210 minutes at 100 degrees C, the gelling time at 160 degrees C 10 minutes.
  • the stator of an electric motor which in the Was preheated to 120 degrees C, slowly immersed.
  • the stator remains in the molten resin system A) until no more bubbles rise. Thereafter, the stator is slowly immersed, about 2 minutes are allowed to drip off and then the resin system A) is cured by heating in the oven to 160 ° C. for 30 minutes.
  • the winding of the stator After hardening, the winding of the stator is sufficiently solidified. After sawing up the winding, the stator shows sufficient impregnation.
  • the mass loss determined thermogravimetrically when heating in the TGA apparatus to 160 degrees C in 10 minutes and maintaining the temperature at 160 degrees for 30 minutes is 2.3% by weight, based on the resin system A).
  • a monomer-free vinyl ester Al) (type Palatal A430-01, monomer-free, manufacturer BASF AG), which is solid at room temperature and has a viscosity of 500 mPas at 100 degrees C, is melted in the storage container of a conventional trickling system. After mixing 1% by weight, based on the entire resin system A), of tert-butyl perbenzoate as hardener A2) with a conventional mixing metering head, the resin system A) thus prepared is instilled onto an anchor, the winding of which is passed through Electricity heat had been heated to 140 degrees C. The resin system A) is cured at 140 degrees C for 15 minutes. After hardening, the winding is sufficiently solidified.
  • thermo-gravimetrically determined mass loss when heating up in the TGA apparatus to 140 degrees C in 10 minutes and shaving The temperature at 140 ° C. for 15 minutes is 1.4% by weight, based on the resin system A).

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Chemically Coating (AREA)
  • Electrodes Of Semiconductors (AREA)
  • Polymerisation Methods In General (AREA)
  • Reinforced Plastic Materials (AREA)
  • Insulating Of Coils (AREA)
  • Organic Insulating Materials (AREA)
EP96934760A 1995-11-15 1996-10-19 Verfahren zur imprägnierung von elektrisch leitenden substraten Withdrawn EP0880785A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1995142564 DE19542564A1 (de) 1995-11-15 1995-11-15 Verfahren zur Imprägnierung von elektrisch leitenden Substraten
DE19542564 1995-11-15
PCT/EP1996/004552 WO1997018567A1 (de) 1995-11-15 1996-10-19 Verfahren zur imprägnierung von elektrisch leitenden substraten

Publications (1)

Publication Number Publication Date
EP0880785A1 true EP0880785A1 (de) 1998-12-02

Family

ID=7777522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934760A Withdrawn EP0880785A1 (de) 1995-11-15 1996-10-19 Verfahren zur imprägnierung von elektrisch leitenden substraten

Country Status (10)

Country Link
EP (1) EP0880785A1 (enrdf_load_stackoverflow)
JP (1) JP2000500289A (enrdf_load_stackoverflow)
BR (1) BR9611459A (enrdf_load_stackoverflow)
CA (1) CA2237765A1 (enrdf_load_stackoverflow)
DE (1) DE19542564A1 (enrdf_load_stackoverflow)
HR (1) HRP960540A2 (enrdf_load_stackoverflow)
PL (1) PL326654A1 (enrdf_load_stackoverflow)
TW (1) TW319719B (enrdf_load_stackoverflow)
WO (1) WO1997018567A1 (enrdf_load_stackoverflow)
YU (1) YU60196A (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648133A1 (de) * 1996-11-21 1998-05-28 Beck & Co Ag Dr Verfahren zur Tränkung von Bauteilen
DE19648134A1 (de) * 1996-11-21 1998-05-28 Beck & Co Ag Dr Verfahren zur Tränkung von Bauteilen
DE19711410A1 (de) 1997-03-19 1998-09-24 Beck & Co Ag Dr Tränk-, Verguß- und Überzugsmassen für elektrotechnische und/oder elektronische Bauteile sowie für Trägermaterialien für flächige Isolierstoffe
JP3917520B2 (ja) 2001-01-09 2007-05-23 ブラック アンド デッカー インク 熱伝導性プラスチックでコーティングされた電機子を有する電気モータ
US6946758B2 (en) 2001-01-09 2005-09-20 Black & Decker Inc. Dynamoelectric machine having encapsulated coil structure with one or more of phase change additives, insert molded features and insulated pinion
US7096566B2 (en) 2001-01-09 2006-08-29 Black & Decker Inc. Method for making an encapsulated coil structure
US7814641B2 (en) 2001-01-09 2010-10-19 Black & Decker Inc. Method of forming a power tool
FR2910012B1 (fr) * 2006-12-15 2009-03-06 Cray Valley S A Sa Resines polyesters insatures fonctionnalises par imides cycloaliphatiques insaturees, pour revetements et compositions de moulage
DE102009045200B4 (de) * 2009-09-30 2021-02-11 Inter-Consult Gmbh Verfahren und Vorrichtung zum Bearbeiten von Bauteilen elektrischer Maschinen
JP5500358B2 (ja) * 2010-04-22 2014-05-21 日立化成株式会社 電気絶縁用樹脂組成物及びこの組成物を用いた電気機器
DE202010017440U1 (de) * 2010-11-12 2011-11-10 Gottlob Thumm Maschinenbau Gmbh Imprägnieranlage mit einer Reinigungsvorrichtung
DE102010060515B4 (de) * 2010-11-12 2016-01-21 Gottlob Thumm Maschinenbau Gmbh Imprägnieranlage mit einer Reinigungvorrichtung
DE102011078592B4 (de) * 2011-07-04 2013-07-25 Siemens Aktiengesellschaft Supraleitende Spulenanordnung und Verfahren zu deren Herstellung
DE102011052518A1 (de) * 2011-08-09 2013-02-14 Elantas Gmbh Lösemittelfreie Drahtlackzusammensetzung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221360A (ja) * 1983-05-31 1984-12-12 Mitsubishi Electric Corp 不飽和ポリエステルワニス組成物
US4554470A (en) * 1984-06-08 1985-11-19 Westinghouse Electric Corp. Polybutadiene VPI resin
JPH03105902A (ja) * 1989-09-20 1991-05-02 Hitachi Ltd 超電導コイル
JP2964530B2 (ja) * 1990-03-20 1999-10-18 日本曹達株式会社 硬化性樹脂組成物
DE4140738A1 (de) * 1991-12-11 1993-06-17 Herberts Gmbh Haertbare masse, verfahren zu deren herstellung und deren verwendung zur fixierung von wickelguetern
DE4331086A1 (de) * 1993-09-11 1995-03-16 Herberts Gmbh Verfahren zur Fixierung von Wickelgütern mit radikalisch polymerisierbaren Massen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9718567A1 *

Also Published As

Publication number Publication date
WO1997018567A1 (de) 1997-05-22
HRP960540A2 (en) 1997-12-31
JP2000500289A (ja) 2000-01-11
BR9611459A (pt) 1999-02-17
DE19542564A1 (de) 1997-05-22
YU60196A (sh) 1998-08-14
CA2237765A1 (en) 1997-05-22
TW319719B (enrdf_load_stackoverflow) 1997-11-11
PL326654A1 (en) 1998-10-12

Similar Documents

Publication Publication Date Title
WO1997018567A1 (de) Verfahren zur imprägnierung von elektrisch leitenden substraten
EP0643467B2 (de) Verfahren zur Fixierung von Wickelgütern mit radikalisch polymerisierbaren Massen
US4581293A (en) Coating powder
US6908692B1 (en) Coating composition for metallic conductors and coating method using same
EP1300439A1 (de) Füllstoff für die Verwendung in elektrischen Feststoff-Isolatoren
CN101821817A (zh) 聚合物混凝土电绝缘体系
CH362133A (de) Elektrischer Isolationskörper und Verfahren zu seiner Herstellung
DE1690494A1 (de) Wetterbestaendiger elektrischer Isolator
DE112014000568B4 (de) Zusammensetzung zum Fixieren von bewickelten Gegenständen, Verfahren zu deren Herstellung, Verfahren zum Fixieren von bewickelten Gegenständen und bewickelter Gegenstand
EP0968501B1 (de) Tränk-, verguss- und überzugsmassen für elektrotechnische und/oder elektronische bauteile sowie für trägermaterialien für flächige isolierstoffe
CN113278109B (zh) 低挥发高性能环保型绝缘树脂及其制备方法
DE19600149A1 (de) Tränk-, Verguß- und Überzugsmassen
EP1753820B1 (de) Tränkharzformulierung
PL194825B1 (pl) Sposób wytwarzania impregnowalnej, zawierającej wbudowany przyspieszacz, taśmy drobnomikowej dla izolacji głównej w wirującej maszynie wysokonapięciowej
DE19811333A1 (de) Für metallische Leiter geeignete Beschichtungszusammensetzung
EP1716580B1 (de) Verfahren zur herstellung von beschichteten elektrischen drähten
EP1122282B1 (de) Emissionarme Elektroisoliermassen
JPH05304040A (ja) 電気機器の製造法
EP2663598B1 (de) Tränkharzformulierung für elektrische wicklungen
JPS58160308A (ja) 熱硬化性樹脂組成物
DE19813315A1 (de) Verfahren zum Fixieren von Wickelgütern
DE19707478A1 (de) Tränk- und Überzugspolyeserharzlösungen und deren Verwendung
CH696992A5 (de) Imprägniertes Glimmerband.
DE19939759A1 (de) Schmelzharze und ihre Verwendung
JPS58160373A (ja) 電気絶縁用ポリエステル系樹脂組成物

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980706

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHENECTADY INTERNATIONAL, INC.

17Q First examination report despatched

Effective date: 19991210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010410