DK167153B1 - IMPRESSION RESIN COMPOSITIONS AND PROCEDURES FOR INSULATING ELECTRIC WINDOWS - Google Patents
IMPRESSION RESIN COMPOSITIONS AND PROCEDURES FOR INSULATING ELECTRIC WINDOWS Download PDFInfo
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- DK167153B1 DK167153B1 DK352784A DK352784A DK167153B1 DK 167153 B1 DK167153 B1 DK 167153B1 DK 352784 A DK352784 A DK 352784A DK 352784 A DK352784 A DK 352784A DK 167153 B1 DK167153 B1 DK 167153B1
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- 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
- H01B3/42—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 polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
- H01B3/425—Non-saturated polyesters derived from polycarboxylic acids and polyhydroxy compounds, in which at least one of the two components contains aliphatic unsaturation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/04—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters
- C08F299/0478—Copolymers from unsaturated polyesters and low molecular monomers characterised by the monomers used
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- Organic Insulating Materials (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
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- Manufacture Of Motors, Generators (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
i DK 167153 B1in DK 167153 B1
Den foreliggende opfindelse angår imprægneringsharpikssammensætninger på basis af umættede polyesterharpikser og copolymeriserbare monomerer af acrylolyl- og/eller methacrylolylforbi ndel ser. Sådanne imprægneringsharpikssammensætninger anvendes til isolering af elektriske 5 viklinger f.eks. i motorer, transformatorer og generatorer.The present invention relates to impregnation resin compositions based on unsaturated polyester resins and copolymerizable monomers of acrylolyl and / or methacrylolyl compounds. Such impregnating resin compositions are used to insulate electrical windings e.g. in motors, transformers and generators.
Imprægneringsharpikssammensætninger af den i indledningen beskrevne art anvendes teknisk i stort omfang og er bl.a. beskrevet i DE-A-15 70 273 og 28 56 050. De i praksis anvendte imprægneringsharpikssammensætninger indeholder imidlertid udelukkende styren som copolymeriserbar mo-10 nomerforbindelse (såkaldt reaktivfortynder). Selv om det i de ovennævnte patentskrifter er omtalt, at også acrylolyl- og/eller methacrylolylforbindelser kan anvendes som reaktivfortyndere, gives der ingen eksempler herpå, og der findes ingen produkter i handelen, som indeholder disse reaktivfortyndere i stedet for styren. Årsagen hertil er, at imprægne-15 ringsharpikssammensætningerne har en høj viskositet, således at man har antaget, at en upåklagelig imprægnering af de elektriske viklinger ikke kunne opnås.Impregnation resin compositions of the kind described in the preamble are used to a large extent technically. described in DE-A-15 70 273 and 28 56 050. However, in practice the impregnation resin compositions used contain only styrene as a copolymerizable monomer compound (so-called reactive diluent). Although it is mentioned in the aforementioned patents that also acrylolyl and / or methacrylolyl compounds can be used as reactive thinners, no examples are given and there are no commercial products containing these reactive thinners instead of styrene. The reason for this is that the impregnating resin compositions have a high viscosity, so that it is believed that impeccable impregnation of the electric windings could not be achieved.
Anvendelsen af styren som reaktivfortynder giver ganske vist tilstrækkelig lavviskose imprægneringsharpikssammensætninger, men er all i -20 gevel forbundet med flere ulemper. Styren fordamper i betydelig grad under udhærdningen, går altså tabt. Styrentabet er af størrelsesordenen ca. 15 til 30 vægtprocent beregnet på den til imprægnering anvendte imprægneringsharpikssammensætning. Styrenlugten er overordentlig ubehagelig. Styren er ikke fysiologisk uskadeligt og hører til skadestofklasse 25 II ifølge TA-Luft (luftteknisk vejledning for Vesttyskland). Styrenhol-dige imprægneringsharpikssammensætninger har også den ulempe, at de i et vist omfang angriber trådlakisoleringen, hvilket kan medføre, at der dannes revner i trådlakisoleringen, som kan føre til betydelig forringelse af isoleringssystemet ved praktisk anvendelse, med de dertil sva-30 rende følger.The use of styrene as a reactive diluent provides sufficiently low viscous impregnation resin compositions, but all in -20 façade are associated with several disadvantages. The board evaporates to a considerable extent during the curing, so is lost. The loss of control is of the order of approx. 15 to 30% by weight based on the impregnation resin composition used for impregnation. The smell of the steering wheel is extremely unpleasant. The handlebar is not physiologically harmless and belongs to class 25 II according to TA-Luft (aeronautical guide for West Germany). Styrene-containing impregnation resin compositions also have the disadvantage that they attack the wire lacquer insulation to some extent, which can cause cracks in the wire lacquer insulation which can lead to significant deterioration of the insulation system in practical use, with the corresponding consequences.
Den foreliggende opfindelse har til formål at finde imprægneringsharpikssammensætninger, som har et mindre fordampningstab og fysiologisk ikke er mere skadelige end styrenholdige imprægneringsharpikssammensætninger, og som har en kraftigere indtrængning i viklingerne, som impræg-35 neres, og følgelig en bedre imprægneringsvirkning.The present invention has for its object to find impregnation resin compositions which have less evaporation loss and are physiologically no more harmful than styrene-containing impregnation resin compositions, and which have a stronger penetration into the coils which are impregnated and, consequently, a better impregnation effect.
Når man forsøger at fremstille imprægneringsharpikssammensætninger på basis af umættede polyesterharpikser og acrylolyl- og/eller methacrylolyl forbindelser ifølge ovennævnte DE-A-15 70 273 og 28 56 050, hvor 2 DK 167153 B1 man anvender sådanne sædvanlige forbindelser som hydroxypropylmethacry-lat (HPMA), butandioldimethacrylat (BDDMA) og neopentylglyceroldimetha-crylat (NPG-DMA) alene, viser det sig, at tilsvarende imprægneringsharpikssammensætninger udviser ubrugelige egenskaber. Det har imidlertid 5 højst overraskende vist sig, at ganske bestemte acrylater ikke alene er brugbare, men ikke har de ovennævnte ulemper ved styrenholdige imprægneringsharpikssammensætninger og derudover besidder uventede fordele, som omtales nærmere i det følgende.When attempting to prepare impregnation resin compositions based on unsaturated polyester resins and acrylolyl and / or methacrylolyl compounds of the above-mentioned DE-A-15 70 273 and 28 56 050, where such usual compounds as hydroxypropyl methacrylic are used (HP) , butanediol dimethacrylate (BDDMA) and neopentylglycerol dimethacrylate (NPG-DMA) alone, it appears that similar impregnation resin compositions exhibit useless properties. However, it has been found, most surprisingly, that very specific acrylates are not only useful, but do not have the aforementioned disadvantages of styrene-containing impregnating resin compositions and, in addition, have unexpected advantages, which are discussed in more detail below.
Den foreliggende opfindelse angår således imprægneringsharpikssam-10 mensætninger på basis af umættede polyestere og acrylolyl- og/eller me-thacrylolylforbindel ser som reaktivfortynder, som kendetegnes ved, at de som reaktivfortynder indeholder a) hexandioldiacrylat og/eller b) butandioldiacrylat, 15 og at imprægneringsharpikssammensætningernes viskositet maksimalt er 1500 mPa · s ved 25°C.The present invention thus relates to impregnation resin compositions based on unsaturated polyesters and acrylolyl and / or methacrylolyl compounds as reactive diluents, characterized in that they contain as a reactive diluent a) hexanediol diacrylate and / or b) butanediol diacrylate and 15 maximum viscosity is 1500 mPa · s at 25 ° C.
Opfindelsen angår desuden en fremgangsmåde til isolering af viklinger ved imprægnering af viklingerne med imprægneringsharpikssammensætninger, som kendetegnes ved, at der anvendes imprægner!ngsharpikssam-20 mensætninger ifølge den ovennævnte definition.The invention further relates to a method for insulating windings by impregnating the windings with impregnating resin compositions, characterized in that impregnating resin compositions are used as defined above.
Det er altså væsentligt, at der ifølge opfindelsen anvendes: a) hexandioldiacrylat (HDDA) og/eller b) butandioldiacrylat (BuDA) som acrylat.It is thus essential that the invention utilizes: a) hexanediol diacrylate (HDDA) and / or b) butanediol diacrylate (BuDA) as acrylate.
25 Acrylatmængden afpasses af fagmanden efter hvor umættet polyesteren er. Der kan anvendes et betydeligt underskud eller et lille overskud.The amount of acrylate is adjusted by the person skilled in the art to suit the unsaturated polyester. A significant deficit or small surplus can be used.
Det er imidlertid ikke nødvendigt at anvende et så stort overskud, som det sædvanligvis er med styren, da der som ovenfor omtalt fordamper betragtelige mængder styren ved udhærdningen af de imprægnerede spoler.However, it is not necessary to use as much excess as is usually the case with styrene, as, as mentioned above, considerable quantities of styrene are evaporated in the curing of the impregnated coils.
30 Selv om der som omtalt kan anvendes et underskud, er dette som regel ikke hensigtmæssigt, da alle umættethederne i den umættede polyester hensigtsmæssigt bør tværbindes v.h.a. acrylatet og methacrylatet. Da fordampningstabet ved anvendelse af imprægneringsharpikssammensætninger ifølge opfindelsen som regel højst udgør 5 vægtprocent, for det meste 35 højst 2 vægtprocent, af de nævnte acrylater, beregnet på den mængde, som er nødvendig til fuldstændig tværbinding af umættethederne, foretrækkes det, at imprægneringsharpikssammensætningerne ifølge opfindelsen ikke indeholder et overskud af acrylat og methacrylat, som er større end 5 DK 167153 B1 3 vægtprocent, fortrinsvis 2 vægtprocent, som ovenfor defineret. Når der anvendes et underskud bør dette af de ovenfor angivne årsager ikke være under 10 vægtprocent, fortrinsvis ikke under 5 vægtprocent, svarende til ovennævnte definition.Although, as discussed above, a deficit can be used, this is usually not appropriate, since all the unsaturations of the unsaturated polyester should be suitably crosslinked by the acrylate and the methacrylate. Since the evaporation loss using impregnating resin compositions of the invention is usually at most 5% by weight, usually 35 at most 2% by weight, of the said acrylates, calculated on the amount needed to completely crosslink the unsaturation resins, it is preferable that the impregnation resin compositions not be contains an excess of acrylate and methacrylate greater than 5% by weight, preferably 2% by weight, as defined above. When a deficit is used, for the reasons stated above, this should not be less than 10% by weight, preferably not less than 5% by weight, corresponding to the above definition.
5 Et yderligere væsentligt kendetegn ved imprægneringsharpikssammen sætninger ifølge opfindelsen er, at deres viskositet ved 25°C maksimalt er 1500 mPa · s. Det drejer sig herved om viskositeter, som ligger betragteligt over viskositeterne for i handelen værende imprægneringsharpikssammensætninger på basis af styren som reaktivfortynder. Disse har 10 som regel en viskositet i området ca. 100 til 500 mPa · s. Det er for fagfolk overordentligt overraskende, at der med så høje viskositer, som imprægneringsharpikssammensætninger ifølge opfindelsen kan have, kan opnås en upåklagelig indtrægning mellem viklingerne, hvorved de mekaniske og elektriske egenskaber i isolationssystemet svarer til teknikkens 15 standpunkt eller er bedre end de egenskaber, som kan opnås med styren-holdige imprægneringsharpikssammensætninger ifølge teknikkens standpunkt.A further essential feature of the impregnating resin compositions of the invention is that their viscosity at a maximum of 2500 C is 1500 mPa · s. These are viscosities which are significantly above the viscosities of commercially available impregnated resin based reactants. These typically have a viscosity in the range of approx. It is extremely surprising to those skilled in the art that with such high viscosities as the impregnating resin compositions of the invention may have, impeccable penetration between the windings can be achieved, whereby the mechanical and electrical properties of the insulation system correspond to the prior art or is superior to the properties obtainable with styrene-containing impregnating resin compositions of the prior art.
I en foretrukken udførelsesform af opfindelsen indeholder imprægneringsharpikssammensætningerne yderligere 20 c) hydroxypropylmethacrylat (HPMA) og/eller d) butandiolmonoacrylat (BDMA), og det i mængder på indtil ca. 10 vægtprocent, beregnet på den samlede mængde acrylat og methacrylat. Ved tilsætning af disse mono(meth)acryla-ter sænkes viskositen, isoleringens øvrige egenskaber forbedres dog næp-25 pe. Mængden af disse mono(meth)acrylater bør derfor holdes lavest muligt, hensigtmæssigt under 5 vægtprocent. Med en mængde på mere end 1 vægtprocent kan der allerede opnås en mærkbar formindskelse af viskositeten.In a preferred embodiment of the invention, the impregnating resin compositions further comprise c) hydroxypropyl methacrylate (HPMA) and / or d) butanediol monoacrylate (BDMA), and in amounts up to ca. 10% by weight, based on the total amount of acrylate and methacrylate. By adding these mono (meth) acrylates, the viscosity is lowered, but the other properties of the insulation are hardly improved. The amount of these mono (meth) acrylates should therefore be kept as low as possible, conveniently below 5% by weight. With an amount of more than 1% by weight, a noticeable decrease in viscosity can already be achieved.
Overraskende er det imidlertid ikke muligt at få imprægneringshar-30 pikssammensætninger med brugbare eller i forhold til teknikkens standpunkt overlegne egenskaber ved kun at benytte acrylaterne c) og/eller d).Surprisingly, however, it is not possible to obtain impregnating resin compositions having useful or superior properties in the prior art, using only acrylates c) and / or d).
I en anden udførelsesform ifølge opfindelsen indeholder imprægneringsharpikssammensætningerne yderligere tri(meth)acrylater hensigtsmæs-35 sigt i samme mængder, som blev omtalt ovenfor for monoacrylaterne. Tilsætningen af disse triacrylater har den overraskende virkning, at de mekaniske egenskaber, f.eks. sammenbagningstallet efter DIN 46448 for den udhærdede imprægneringsharpikssammensætning, forbedres. Egnede tri- 4 DK 167153 B1 (meth)acrylater er pentaerythrittriacrylat, pentaerythrittrimethacrylat, tri methylolpropantri aery1 at, tri methylolpropantri methacrylat.In another embodiment of the invention, the impregnating resin compositions additionally contain tri (meth) acrylates suitably in the same amounts discussed above for the monoacrylates. The addition of these triacrylates has the surprising effect that the mechanical properties, e.g. the baking number according to DIN 46448 for the cured impregnation resin composition is improved. Suitable tri- 4 DK 167153 B1 (meth) acrylates are pentaerythritite triacrylate, pentaerythritite trimethacrylate, tri methylolpropantri arylate, tri methylolpropantri methacrylate.
Imprægneringsharpikssammensætningerne ifølge opfindelsen kan som umættede polyesterharpikser indeholde de kendte til dette formål an-5 vendte forbindelser, især de såkaldte imidholdige umættede polyestere, som er beskrevet i DE-A-15 70 273, 17 70 386 og 28 56 050. Der kan imidlertid også anvendes såkaldte imidfrie polyestere, som har været kendt i årtier. Disse umættede polyestere er kondensationsprodukter af polyva-lente carboxylsyrer, polyvalente alkoholer, og - når de er imidholdige -10 forbindelser, som indeholder aminogrupper evt. med en del monofunktio-nelle forbindelser. Eksempler på polyvalente carboxyl syrer er dicarbo-xylsyrer, som malein- eller fumarsyre, citraconcyre, itakonsyre evt. i blanding med mættede eller aromatiske carboxylsyrer som rav- eller adi-pinsyre, phthalsyre, isophthalsyre, terephthalsyre og lignende, samt 15 tetrahydrophthalsyre, endomethylentetrahydrophthalsyre og de tilsvarende helt eller delvist halogenerede forbindelser (med flammehæmmende egenskaber). Eksempler på forbindelser med forskellige funktionelle grupper er citronsyre, monoethanolamin, aminoethancarboxylsyre samt de tilsvarende aminoalkohol er eller aminocarboxylsyrer, som indeholder 3 eller 4 20 CH2-grupper. Syrerne kan anvendes i form af estere, halvestere eller anhydrider. Som forbindelser med hydroxylgrupper kan principielt ligeledes anvendes forbindelser, som anvendes til fremstilling af polyestere ifølge teknikkens standpunkt. Egnede dioler er f.eks. glykol, neopentyl-glykol, propylglykol. Polyoler med 3 eller 4 hydroxylgrupper er eksem-25 pelvis glycerin, trimethylolpropan, trimethylolethan, pentaerythrit, di-pentaerythrit, trishydroxyethylisocyanurat. De imidholdige umættede polyestere indeholder hensigtsmæssigt indkondenseret tetrahydrophthalsyre eller anhydrid deraf, som sammen med aminogrupper danner en 5-leddet imidring. Polyesteren kan som kædeafbryder også indeholde monofunktio-30 nelle carboxylsyrer, alkoholer og/eller aminer. Den kan også indeholde mættede og umættede olier f.eks. hydroxyfunktionelle olier, som ricinusolie eller carboxyfunktionelle olier, som maleinatolie.The impregnating resin compositions of the invention may contain as unsaturated polyester resins the known compounds used for this purpose, in particular the so-called imide-containing unsaturated polyesters described in DE-A-15 70 273, 17 70 386 and 28 56 050. However, are used so-called imide-free polyesters, which have been known for decades. These unsaturated polyesters are condensation products of polyhydric carboxylic acids, polyhydric alcohols, and - when imide-containing - 10 compounds containing amino groups, optionally. with some monofunctional compounds. Examples of polyhydric carboxylic acids are dicarboxylic acids, such as maleic or fumaric acid, citraconic acid, itaconic acid or the like. in admixture with saturated or aromatic carboxylic acids such as succinic or adipic acid, phthalic acid, isophthalic acid, terephthalic acid and the like, as well as tetrahydrophthalic acid, endomethylenetetrahydrophthalic acid and the corresponding fully or partially halogenated compounds (with flame retardant properties). Examples of compounds with various functional groups are citric acid, monoethanolamine, aminoethanecarboxylic acid, and the corresponding amino alcohols or aminocarboxylic acids containing 3 or 4 CH2 groups. The acids can be used in the form of esters, semesters or anhydrides. As compounds with hydroxyl groups, in principle, compounds which are used for preparing polyesters according to the prior art can also be used. Suitable diols are e.g. glycol, neopentyl glycol, propyl glycol. Polyols having 3 or 4 hydroxyl groups are, for example, glycerine, trimethylolpropane, trimethylolethane, pentaerythritis, dipentaerythritis, trishydroxyethyl isocyanurate. The imidated unsaturated polyesters suitably contain condensed tetrahydrophthalic acid or anhydride thereof which together with amino groups forms a 5-membered imidation. The polyester may also contain, as a chain switch, monofunctional carboxylic acids, alcohols and / or amines. It may also contain saturated and unsaturated oils e.g. hydroxy-functional oils, such as castor oil or carboxy-functional oils, such as maleate oil.
Imprægneringsharpikssammensætningerne ifølge opfindelsen kan ydermere indeholde sædvanlige tilsætningsstoffer, som pigmenter, fyldstof-35 fer, plastificerende bestanddele, katalysatorer (f.eks. peroxider), acceleratorer (f.eks. metalsalte), stabilisatorer (f.eks. hydroquinon, benzoquinon), således som det også omtales i den ovennævnte litteratur.Further, the impregnating resin compositions of the invention may contain usual additives such as pigments, fillers, plasticizers, catalysts (e.g. peroxides), accelerators (e.g. metal salts), stabilizers (e.g. hydroquinone, benzoquinone), thus as also mentioned in the above literature.
Imprægneringsharpikssammensætninger ifølge opfindelsen kan også in- 5 DK 167153 B1 deholde små mængder styren eller allylforbindelser, som di allylphthalat til opnåelse af særlige virkninger, idet disse mængder ikke overstiger 10 vægtprocent, beregnet på vægten af acrylater, som indeholdes i im-prægneri ngsharpi kssammensætni ngerne.Impregnating resin compositions of the invention may also contain small amounts of styrene or allyl compounds such as di allyl phthalate to obtain special effects, these amounts not exceeding 10% by weight, based on the weight of acrylates contained in impregnating resin coatings. .
5 Anvendelsen af imprægneringsharpikssammensætninger til imprægnering af elektriske viklinger kan f.eks. ske på følgende måde:The use of impregnating resin compositions for impregnating electrical windings may e.g. is done as follows:
Neddypn i ngs i mprægneri ngDepth in ngs in impregnation
Ved denne fremgangsmåde neddyppes godset, som skal imprægneres, i 10 imprægneringsharpiksen i en ved forforsøg fastlagt tid eller trækkes gennem imprægneringsharpiksen ved en gennemløbsfremgangsmåde. Derefter sker hærdning af imprægneringsharpiksen i en kammer- eller gennemløbsovn i løbet af 1 til 5 timer ved 120 til 170°C.In this method, the goods to be impregnated are immersed in the impregnating resin for a predetermined time or drawn through the impregnating resin by a through process. Thereafter, the impregnation resin is cured in a chamber or pass-through furnace within 1 to 5 hours at 120 to 170 ° C.
15 Vakuumimprægnering15 Vacuum impregnation
Ved anvendelse af denne fremgangsmåde anbringes godset, som skal imprægneres, i en vakuumbeholder, og denne evakueres.Using this method, the goods to be impregnated are placed in a vacuum container and evacuated.
Når det ønskede vakuum er nået, føres imprægneringsmidlet til vakuumkedlen fra en lagerbeholder. Afgørende for imprægneringskvaliteten er 20 ikke en meget langvarig opretholdelse af vakuumet, men ventilationstidens længde, da imprægneringsmidlet indtrykkes i de tilbageværende hulrum v.h.a. det ved brydning af vakuumet opståede tryk.When the desired vacuum is reached, the impregnating agent is fed to the vacuum boiler from a storage container. Crucial to the impregnation quality is not a very long-term maintenance of the vacuum, but the length of the ventilation time, as the impregnating agent is pressed into the remaining voids by means of a vacuum. the pressure created by breaking the vacuum.
For at opnå hurtigere tider kan også overtryk anvendes efter undertrykket. Kun til ganske få emner, som er meget svære at imprægnere, 25 er vakuum-trykfremgangsmåden uundgåelig.For faster times, overpressure can also be used after suppression. Only for very few items that are very difficult to impregnate, is the vacuum printing process inevitable.
Hærdningen sker som beskrevet under neddypningsfremgangsmåden.The curing takes place as described in the immersion process.
Dryppeimprægnering I modsætning til de ovenfor beskrevne fremgangsmåder neddyppes em-30 nerne ikke i imprægneringsmidlet ved dryppeimprægnering, men midlet påføres v.h.a. dyser på den roterende vikling.Drip impregnation Contrary to the methods described above, the blanks are not immersed in the impregnating agent by drip impregnation, but the agent is applied by means of drip water. nozzles on the rotating winding.
For med sikkerhed at opnå en god indtrængning af harpikserne er det nødvendigt at forvarme objekterne, som skal imprægneres. Dette kan udføres ved induktiv opvarmning eller ved opvarmning i en foran indskudt 35 ovn. Da harpiksen, som skal anvendes her, udviser ganske korte geltider (ca. 5 til 8 min. ved 100°C mod mindst 14 min. ved 100°C for imprægneringsharpikser), må temperaturen ved drypningsforløbet ikke overstige 95eC for at forhindre en for tidlig gelering af harpiksen i renden. Der- DK 167153 B1 6 næst opvarmes de stadig roterende emner videre til ca. 130° og udhærder i løbet af 15 til 30 min., alt efter hvorledes harpiksen er indstillet.In order to achieve a good penetration of the resins, it is necessary to preheat the objects to be impregnated. This can be done by inductive heating or by heating in a pre-inserted oven. Since the resin to be used here exhibits very short gel times (about 5 to 8 minutes at 100 ° C versus at least 14 minutes at 100 ° C for impregnating resins), the temperature of the drip course should not exceed 95 ° C to prevent premature gelation of the resin in the gutter. Next, the still rotating blanks are further heated to approx. 130 ° and cures over 15 to 30 minutes, depending on how the resin is set.
Neddypninqsimprægnering med efterfølgende roterende udhærdning 5 Denne fremgangsmåde anvendes hovedsagligt ved store stærkt belaste de rotorer og statorer. Emnerne neddyppes som sædvanligt i imprægneringsmidlet (evt. under vakuum) og trækkes dernæst på roterende stationer eller valser gennem hærdeovnen. Hærdningen sker i løbet af 2 til 6 timer ved 120 til 170*C.Submersible Impregnation with Subsequent Rotary Curing 5 This method is mainly used for large, heavily loaded rotors and stators. The blanks are immersed as usual in the impregnating agent (possibly under vacuum) and then drawn on rotating stations or rollers through the curing oven. The curing takes place over 2 to 6 hours at 120 to 170 ° C.
1010
Fremstil!ingseksempler for umættede polyestere (UP)Preparation Examples for Unsaturated Polyesters (UP)
Fremstil!inqseksempel 1 I en reaktionsbeholder, som er udstyret med termometer, omrører og 15 kondensator opvarmes 2.325 g ricinusolie og 600 g maleinsyreanhydrid til 130eC under omrøring og tilledning af inert gas og holdes dernæst ved 130eC i 2 timer. På denne måde opnås et forprodukt, som anvendes på den i det efterfølgende beskrevne måde.Preparation Example 1 In a reaction vessel equipped with a thermometer, stirrer and condenser, 2,325 g of castor oil and 600 g of maleic anhydride are heated to 130 ° C with stirring and feeding of inert gas and then kept at 130 ° C for 2 hours. In this way, a precursor is obtained which is used in the manner described below.
I en 2 liters trehal set kolbe, som er udstyret med termometer, om-20 rører, kappe (tysk: Auskreiser) og kondensator, fyldes først 150 g mono-ethanolamin og 100 ml xylen, og der tilsættes portionsvist 372 g tetra-hydrophthalsyreanhydrid på en sådan måde, at den eksoterme reaktion forbliver under kontrol. Dernæst opvarmes til 165°C og kondenseres til et syretal < 3 under xylen-tilbagesvaling. Nu tilsættes 73 g maleinsyrean-25 hydrid, 819 g forprodukt og 60 ml xylen, og der opvarmes til 185-190eC under omrøring og xylen-tilbagesvaling. Når der nås et syretal på ca.In a 2 liter three-neck flask equipped with a thermometer, stirrer, sheath (German: Auskreis) and condenser, 150 g of mono-ethanolamine and 100 ml of xylene are first charged, and 372 g of tetrahydrophthalic anhydride are added portionwise. in such a way that the exothermic reaction remains under control. Next, heat to 165 ° C and condense to an acid number <3 under xylene reflux. Now 73 g of maleic anhydride, 819 g of pre-product and 60 ml of xylene are added and heated to 185-190 ° C with stirring and xylene reflux. When an acid number of approx.
15, afbrydes polykondensationen, og mediet (xylen) destilleres af i vakuum.15, the polycondensation is interrupted and the medium (xylene) distilled off in vacuo.
30 Fremstil!ingseksempel 2Preparation Example 2
Bestanddele; Mængde (g):components; Quantity (g):
Neopentylglykol 426Neopentylglycol 426
Propylenglykol 90 35 Isophthalsyre 424Propylene Glycol 90 35 Isophthalic Acid 424
Maleinsyreanhydrid 248Maleic anhydride 248
Xylen 114Xylene 114
Hydroquinon 0,14 7 DK 167153 B1 I en 4 liters trehal set slibkolbe, som er udstyret med omrører, termometer,vandudskiller og kondensator, fyldes neopentylglykol og pro-pylenglykol, og der opvarmes til 100°C under tilledning af inert gas. Nu tilsættes isophthalsyre, og der opvarmes til 210°C under omrøring. Det 5 ved reaktionen fremkommne vand destilleres af og opsamles i udskilleren.Hydroquinone 0.14 7 DK 167153 B1 In a 4 liter three-neck grinding flask equipped with stirrer, thermometer, water separator and condenser, neopentylglycol and propylene glycol are charged and heated to 100 ° C under inert gas. Now isophthalic acid is added and heated to 210 ° C with stirring. The water produced by the reaction is distilled off and collected in the separator.
Når et syretal på ca. 9 opnås, afbrydes forestringsreaktionen, reaktionsproduktet afkøles til 140°C, maleinsyreanhydrid og xylen tilsættes efter hinanden, og der opvarmes igen til 210°C. Reaktionsblandingen holdes ved 210eC under xylen-tilbagesvaling, indtil et syretal på 16,5 10 nås. Dernæst destilleres xylenen af i vakuum, der afkøles til 160eC, og hydroquinon (stabilisator) tilsættes. Polyesterharpiksen har et syretal på 15,0 og en viskositet på 800 mPa · s målt som 60% opløsning i cyclo-hexanon ved 25'C.When an acid number of approx. 9 is obtained, the esterification reaction is stopped, the reaction product is cooled to 140 ° C, maleic anhydride and xylene are added successively and heated again to 210 ° C. The reaction mixture is kept at 210 ° C under xylene reflux until an acid number of 16.5 10 is reached. Next, the xylene is distilled off in vacuo which is cooled to 160 ° C and hydroquinone (stabilizer) is added. The polyester resin has an acid number of 15.0 and a viscosity of 800 mPa · s measured as 60% solution in cyclohexanone at 25 ° C.
15 Eksempel 1Example 1
Til den ifølge fremstillingseksempel 1 opnåede remanens sættes ved 50°C 2,30 g toluhydroquinon og ved ca. 100eC 850 g af en blanding af he-xandioldiacrylat og hydroxypropylmethacrylat i forholdet 95:5. Den opnåede acryliske opløsning har ved et faststofindhold på 60% en viskositet 20 på 630 mPa · s ved 25eC og et syretal på 10. (Den således opnåede opløsning kaldes acrylopløsning A).To the residue obtained according to Preparative Example 1, 2.30 g of toluhydroquinone are added at 50 ° C and at ca. 100eC 850 g of a mixture of hexane diol diacrylate and hydroxypropyl methacrylate in the ratio 95: 5. The acrylic solution obtained at a solids content of 60% has a viscosity 20 of 630 mPa · s at 25 ° C and an acid number of 10. (The solution thus obtained is called acrylic solution A).
Uafhængigt heraf sættes 830 g af en blanding af hexandioldiacrylat og hydroxypropylmethacrylat i et forhold på 95:5 til den ifølge fremstillingseksempel 2 opnåede remanens. Den opnåede acryliske opløsning 25 har ved et faststofindhold på 55% en viskositet på 1550 mPa · s ved 25*0 og et syretal på 15. (Den således opnåede opløsning kaldes acrylopløs-ning B).Independently, 830 g of a mixture of hexanediol diacrylate and hydroxypropyl methacrylate are added in a ratio of 95: 5 to the residue obtained in Preparative Example 2. The obtained acrylic solution 25 at a solids content of 55% has a viscosity of 1550 mPa · s at 25 * 0 and an acid number of 15. (The solution thus obtained is called acrylic solution B).
I en blandebeholder, som er udstyret med en omrører, fyldes først 660 g acrylopløsning A. Dernæst tilsættes 330 g acrylopløsning B under 30 omrøring. Der omrøres til blandingen er fuldstændig homogen. Den således opnåede imprægneringsharpikssammensætning har ved et faststofindhold på 58% en viskositet på 800 mPa · s ved 25°C. Den anvendes til imprægnering af elektriske emner med viklinger og giver efter udhærdning i løbet af 3 timer ved 130°C isoleringsovertræk med udmærkede mekaniske og elektriske 35 egenskaber.In a mixing vessel equipped with a stirrer, 660 g of acrylic solution A. is first charged. Next, 330 g of acrylic solution B is added under stirring. Stir until the mixture is completely homogeneous. The impregnated resin composition thus obtained has a viscosity of 800 mPa · s at 25 ° C at a solids content of 58%. It is used for impregnating electrical workpieces with windings and after curing for 3 hours at 130 ° C insulating coatings with excellent mechanical and electrical properties.
DK 167153 B1 8DK 167153 B1 8
Afprøvning ifølge DIN 46448 og 53505:Testing according to DIN 46448 and 53505:
Geltid med 2% t-butylperbenzoat (50%) ved 100°C: 10,0 minGel time with 2% t-butyl perbenzoate (50%) at 100 ° C: 10.0 min
Sammenbagningstal ved 155°C: 3,5Cookie number at 155 ° C: 3.5
Viskositet ved 25°C: 800 mPa · s 5 Shore-D-hårdhed: 63 ± 2 Hærdning i tykt lag overside: 111 inderside: 111Viscosity at 25 ° C: 800 mPa · s 5 Shore-D hardness: 63 ± 2 Curing in thick layer upper surface: 111 inside: 111
Eksempel 2 10 I en blandebeholder, som er udstyret med en omrører, fyldes først 500 g acrylopløsning A. Dernæst tilsættes 500 g acrylopløsning B under omrøring. Der omrøres til blandingen er fuldstændig homogen. Den således opnåede imprægneringsharpikssammensætning har ved et faststofindhold på 58% en viskositet på 1100 mPa · s ved 25°C. Den anvendes til imprægne-15 ring af elektriske emner med viklinger og giver efter udhærdning i løbet af 3 timer ved 130eC isoleringsovertræk med udmærkede mekaniske og elektriske egenskaber.Example 2 10 In a mixing vessel equipped with a stirrer, first fill 500 g of acrylic solution A. Then 500 g of acrylic solution B is added with stirring. Stir until the mixture is completely homogeneous. The impregnated resin composition thus obtained has a viscosity of 1100 mPa · s at 25 ° C at a solids content of 58%. It is used for impregnating electrical workpieces with windings and after curing for 3 hours at 130 ° C insulation coatings with excellent mechanical and electrical properties.
Afprøvning ifølge DIN 46448 og 53505:Testing according to DIN 46448 and 53505:
Geltid med 2% t-butylperbenzoat (50%) ved 100eC: 9,0 min 20 Sammenbagningstal ved 155eC: 3,7Gel time with 2% t-butyl perbenzoate (50%) at 100 ° C: 9.0 min.
Viskositet ved 25eC: 1100 mPa · sViscosity at 25 ° C: 1100 mPa · s
Shore-D-hårdhed: 65 ± 2 Hærdning i tykt lag overside: 221 inderside: 121Shore-D hardness: 65 ± 2 Curing in thick layer upper surface: 221 inside: 121
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3325943 | 1983-07-19 | ||
| DE3325943A DE3325943C1 (en) | 1983-07-19 | 1983-07-19 | Resin compounds and their use for the insulation of electrical windings |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK352784D0 DK352784D0 (en) | 1984-07-18 |
| DK352784A DK352784A (en) | 1985-01-20 |
| DK167153B1 true DK167153B1 (en) | 1993-09-06 |
Family
ID=6204319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK352784A DK167153B1 (en) | 1983-07-19 | 1984-07-18 | IMPRESSION RESIN COMPOSITIONS AND PROCEDURES FOR INSULATING ELECTRIC WINDOWS |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0134513B1 (en) |
| JP (1) | JPS6038416A (en) |
| AT (1) | ATE48046T1 (en) |
| DE (2) | DE3325943C1 (en) |
| DK (1) | DK167153B1 (en) |
| FI (1) | FI842885A (en) |
| NO (1) | NO161227C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623329B2 (en) * | 1984-11-12 | 1994-03-30 | 株式会社明電舍 | Insulating paint composition |
| DE4022235A1 (en) * | 1990-07-12 | 1992-01-16 | Herberts Gmbh | METHOD FOR FIXING WRAPPED GOODS AND USE OF RADICALLY POLYMERIZABLE MEASURES HERE |
| DE4022234A1 (en) * | 1990-07-12 | 1992-01-16 | Herberts Gmbh | METHOD FOR THE PRODUCTION OF PROTECTIVE, AUXILIARY AND INSULATING MATERIALS ON A FIBER BASE, FOR ELECTRICAL PURPOSES AND OPTICAL LADDER USING IMPREGNABLE DIMENSIONS THAT ARE CURRENT BY ENERGY RADIATION |
| DE4131337A1 (en) * | 1991-02-02 | 1992-08-06 | Huels Chemische Werke Ag | FORMATS CONTAINING NATURAL FIBERS ON THE BASIS OF UNSATURATED POLYESTER RESINS AND FORM COPPERS OBTAINED THEREFROM |
| DE4217955A1 (en) * | 1992-05-30 | 1993-12-02 | Basf Ag | Styrene-free polyester resins |
| DE4331086A1 (en) * | 1993-09-11 | 1995-03-16 | Herberts Gmbh | Process for the fixation of wound goods with radically polymerizable masses |
| DE19707492A1 (en) * | 1997-02-25 | 1998-08-27 | Beck & Co Ag Dr | Process for coating moldings with polyester resin compositions or solutions |
| WO2001038453A1 (en) | 1999-11-23 | 2001-05-31 | SCHÜMANN SASOL GmbH | Dynamic latent heat accumulator |
| JP3998612B2 (en) * | 2003-08-19 | 2007-10-31 | ミネベア株式会社 | Impregnation and curing winding, impregnation and curing method therefor, impregnation and curing system, impregnation and curing apparatus, varnish coating apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1564091A1 (en) * | 1966-10-25 | 1970-04-16 | Herberts & Co Gmbh Dr Kurt | Melt impregnation of windings of electrical conductors |
| US3655823A (en) * | 1969-11-06 | 1972-04-11 | Ppg Industries Inc | Novel mixtures of acrylic monomers and polyester resins |
| CA992239A (en) * | 1970-09-17 | 1976-06-29 | Ppg Industries, Inc. | Mixture of acrylic monomers and polyesters |
| GB1357012A (en) * | 1970-10-09 | 1974-06-19 | Herbig Haarhaus Herbol Werke | Manufacture of films and coatings cured by exposure to ionizing radiation |
-
1983
- 1983-07-19 DE DE3325943A patent/DE3325943C1/en not_active Expired
-
1984
- 1984-07-17 DE DE8484108373T patent/DE3480506D1/en not_active Expired
- 1984-07-17 AT AT84108373T patent/ATE48046T1/en not_active IP Right Cessation
- 1984-07-17 EP EP84108373A patent/EP0134513B1/en not_active Expired
- 1984-07-17 JP JP59147035A patent/JPS6038416A/en active Granted
- 1984-07-18 FI FI842885A patent/FI842885A/en not_active Application Discontinuation
- 1984-07-18 DK DK352784A patent/DK167153B1/en not_active IP Right Cessation
- 1984-07-18 NO NO842936A patent/NO161227C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6038416A (en) | 1985-02-28 |
| NO161227C (en) | 1989-07-19 |
| DK352784D0 (en) | 1984-07-18 |
| EP0134513A1 (en) | 1985-03-20 |
| ATE48046T1 (en) | 1989-12-15 |
| EP0134513B1 (en) | 1989-11-15 |
| DE3480506D1 (en) | 1989-12-21 |
| DK352784A (en) | 1985-01-20 |
| NO842936L (en) | 1985-01-21 |
| JPH054965B2 (en) | 1993-01-21 |
| FI842885A (en) | 1985-01-20 |
| DE3325943C1 (en) | 1985-02-21 |
| NO161227B (en) | 1989-04-10 |
| FI842885A0 (en) | 1984-07-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |