Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/02—Polycondensates containing more than one epoxy group per molecule
  • C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
  • C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
  • C08G59/063—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols with epihalohydrins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/02—Polycondensates containing more than one epoxy group per molecule
  • C08G59/12—Polycondensates containing more than one epoxy group per molecule of polycarboxylic acids with epihalohydrins or precursors thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
  • C08G59/22—Di-epoxy compounds
  • C08G59/24—Di-epoxy compounds carbocyclic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
  • C08G59/22—Di-epoxy compounds
  • C08G59/24—Di-epoxy compounds carbocyclic
  • C08G59/245—Di-epoxy compounds carbocyclic aromatic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
  • C08G59/32—Epoxy compounds containing three or more epoxy groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
  • C08G59/32—Epoxy compounds containing three or more epoxy groups
  • C08G59/3218—Carbocyclic compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
  • C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
  • C08G59/4014—Nitrogen containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
  • C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
  • C08G59/4078—Curing agents not provided for by the groups C08G59/42 - C08G59/66 boron containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
  • C08G59/62—Alcohols or phenols
  • C08G59/625—Hydroxyacids
  • C08G59/626—Lactones
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
  • C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
  • C08G59/72—Complexes of boron halides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
  • C08J5/248—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using pre-treated fibres
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
  • C08J5/249—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs characterised by the additives used in the prepolymer mixture
• • 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
  • H01B3/40—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 epoxy resins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/26—Layered products comprising a layer of synthetic resin characterised by the use of special additives using curing agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/15—Heterocyclic compounds having oxygen in the ring
  • C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
  • C08K5/1545—Six-membered rings

Definitions

• the invention relates to an impregnating resin mixture and its use
• the insulation system in high voltage devices e.g. Engines or generators, the task of electrically insulating components such as wires, coils or rods permanently against each other and electrically isolate against the stator core or the environment.
• the insulation is usually done in such a way that the conductor to be insulated with an insulating tape, e.g. Mica tape that is wrapped so that the effects of
• an insulating tape eg mica tape
• a mica paper which has often been prepared from a mica pulp (containing muscovite and phlogopite) by means of a binder, with a solid carrier tape, such as fabric, nonwoven or film of eg glass, rock wool, polyester or polyimide glued by means of an adhesive.
• the adhesives used are resin compositions which have a high strength at room temperature to ensure the mica and support bonding and which at elevated temperatures (60 ° C-150 ° C) become liquid. This ensures its application as a liquid adhesive at elevated temperature or in admixture with a volatile solvent.
• the adhesive After cooling or removal of the solvent, the adhesive is in a solid but flexible form and thus allows safe wrapping of the conductive part with the mica tape at Room temperature, wherein the adhesive properties of the adhesive prevent delamination of the mica paper comes from the substrate.
• the adhesive contains an epoxy resin as a resin component, which is well suited for this purpose due to its conductivity characteristics.
• the adhesive has an accelerator component which serves to initiate the curing process of the subsequently applied impregnating resin based on epoxy resin (eg anhydride curing), with only specifically selected accelerators being suitable for this, since premature curing on the mica tape, for example during storage of the Mica tape or during the impregnation had to be avoided.
• This composite is then impregnated with an impregnating resin, preferably in a vacuum pressure impregnation (VPI) process.
• an impregnating resin preferably in a vacuum pressure impregnation (VPI) process.
• VPI vacuum pressure impregnation
• Epoxy Resin Based Carboxylic Anhydrides e.g. Hexahydrophthalic anhydride (HHPA) or methylhexahydrophthalic anhydride (MHHPA), which in turn are suspected to be harmful to health, so this from the
• an impregnating resin mixture having the following composition: a) at least one epoxy resin component selected from the group of
• impregnating resin mixture contains no carboxylic acid anhydrides.
• the impregnating resin mixture according to the invention exhibits a low viscosity, which is required in particular for the VPI process and which is comparable with impregnating resin mixtures containing carboxylic anhydrides and good storage stability.
• glass transition temperatures> 120 ° C can be achieved, whereby a premature start of cure is avoided in the impregnating.
• epoxy resins one or more components selected from the group of the bisphenol A and / or F based polyepoxides and those prepared therefrom
• Advancement resins based on epoxidized halogenated bisphenols and / or epoxidized novolaks and / or polyepoxide esters based on phthalic acid, hexahydrophthalic acid or based on terephthalic acid, epoxidized
• resin components e.g. epoxidized phenol novolaks (condensation product of phenol and, for example, formaldehyde and / or glyoxal), epoxidized cresol novolaks, bisphenol A based polyepoxides (eg also bisphenol A product and tetraglycidylmethylenediamine), epoxidized halogenated bisphenols (e.g. Polyepoxides based on tetrabromobisphenol A) and / or polyepoxides based on bisphenol F and / or epoxidized novolak and / or epoxy resins based on
• Triglycidyl isocyanurates used as cyclic epoxy resins.
• cyclic epoxy resins the diepoxides of cycloaliphatic esters of dicarboxylic acids, e.g.
• the epoxy equivalent of all these resins is preferably 100 to 2000 g / eq.
• the impregnating resin mixture according to the invention contains lactones.
• Epoxy resin blends containing lactones are known in the art.
• US 3,294,743 and US 3,382,210 disclose corresponding mixtures.
• the mixtures disclosed therein contain as a curing catalyst
• Carboxylic anhydrides and / or BF 3 CompJexe have been found that the Use of BF3 complexes in the VPI process is not suitable because it cures at lower temperatures and thus already in the impregnating bath. Furthermore, should be dispensed with the use of carboxylic anhydrides for the above reasons.
• lactones are meant heterocyclic compounds which contain within the molecule an ester bond, i. H. an oxygen bridge directly at the same
• the lactones also include derivatives whose lactone ring is unsaturated or contains other heteroatoms.
• Preferably used lactone is the ⁇ -caprolactone due to its commercial availability.
• the lactones act at a concentration of 2 to 30 wt.% In the
• Copolymerization built into the polymer network and thus can not develop volatile polluted substances.
• the impregnating resin mixture according to the invention contains from 2 to 30% by weight of lactones. At ⁇ 2% by weight, the viscosity for processing is still too high, at proportions> 30% by weight of lactone is the
• TG Glass transition temperature of the mixture too low.
• Particularly preferred is the use of 5 to 20 wt.% Lactone, since in this case an optimal adjustment between viscosity and glass transition temperature of the mixture and also the vapor pressure of the lactone is achieved.
• the impregnating resin mixture according to the invention contains the
• BCl 3 and / or BCl 3 complexes have the advantages, in particular with regard to other boron halide complexes known from the prior art, such as BF 3 compounds, that they have a sufficient latency.
• BF 3 compounds boron halide complexes known from the prior art, such as BF 3 compounds.
• the reactivity of, for example, BF 3 compounds is too high, in particular for the VPI process, so that the usual temperatures prevailing there would lead to the impregnation bath becomes unstable and a uniform impregnation process is disturbed due to incipient hardening in the impregnating bath.
• imidazoles have the advantage that they can advantageously be low and thus efficiently metered (preferably between 0.2 and 4% by weight) and nevertheless bring about an excellent glass transition temperature (Tg), which corresponds to the
• Cured resin gives the desired network density.
• Unsubstituted or substituted alkyl or else phenylimidazoles can be used as imidazoles. Examples which may be mentioned are 2-methylimidazole, 2-ethyl-4-methylimidazole, the use of unsubstituted 2-phenylimidazole being particularly preferred.
• the concentration of BCl 3 and / or BCl 3 complexes and / or a compound from the group of imidazoles is preferably from 0.2 to 8% by weight, again preferably from BCl 3 and / or BCl 3 complexes from 0.5 to 6 Wt.%, And - as already mentioned, especially with imidazoles preferred - 0.2 and 4 wt.% Based on the sum of
• Epoxy resin components The concentration depends on the combination of the epoxy resin components used and the selection of BCl 3 and / or BCl 3 complexes and / or a compound from the group of imidazoles.
• the impregnating resin mixture according to the invention may optionally contain other additives, e.g. Processing aids or wetting agents used to control surface tension.
• processing aids or wetting agents used to control surface tension.
• hardening ingredients such as e.g. Polyols such as Polypropyleneglycole for flexibilization but wholly on the
• the advantage of the impregnating resin mixture according to the invention is that the viscosity is optimally adjusted by the addition of the lactone acting as a reactive diluent although resin and a hardening component are present in the blend at processing temperatures of 40 to 80 ° C. At the same time, it was possible to dispense with the use of hazardous substances such as carboxylic anhydrides. It is thus a stable at higher temperatures
• the impregnating resin mixture according to the invention should preferably be used for the insulation of medium and high-voltage devices, in particular generators and motors. It can generally be for any
• Impregnation method are used, however, the use in the VPI method is preferred.
• the impregnating resin mixture according to the invention is used as impregnating resin, wherein the conductor to be insulated can be wrapped with or without insulating tape.
• the impregnating resin mixture according to the invention for coating fibers, fabrics, layers, knitted fabrics and. ⁇ .
• From organic or inorganic materials, such as aramid, polyamide, polyester, glass, stone, metal or carbon for the production of corresponding composites in various processes such as RTM, SMC, filament winding is used for example in the
• Impregnating resin mixture for producing an insulation of a conductor to be insulated for a method comprising the following steps is used:
• composition comprising at least one epoxy resin component or novolak, the novolak having a molecular weight of from 250 to 1000 g / mol, and b ) BCl 3 and / or BCl 3 complexes and / or a compound selected from the group of imidazoles and c) optionally contains further additives,
• Impregnating resin mixture comprising the following constituents: d) at least one epoxy resin component selected from the group of the bisphenol A and / or F-based polyepoxides and advancement resins prepared therefrom, based on epoxidized halogenated bisphenols and / or epoxidized novolaks and / or polyepoxide esters on the basis of phthalic acid, hexahydrophthalic acid or based on terephthalic acid, epoxidized polyaddition products of dicyclopentadiene and phenol or cycloaliphatic compounds, e) as reactive diluent 2 to 30 wt.% Lactones based on the sum of the epoxy resin components and f) optionally further additives, wherein the composition of the insulating tape and the
• Impregnating resin mixture has no carboxylic acid anhydrides.
• the composition used according to the invention for the method is used as an adhesive between the non-conductive material, preferably mica, on the reinforcing layer, ie the carrier tape, which is preferably formed from a woven, knitted fabric or film made of glass and / or rock wool and / or polyimides and / or polyester and / or quartz applied in a conventional manner by means of spraying, brushing or doctoring.
• the insulating tape contains 5 to 20 wt.% Of the composition based on the total mass (carrier tape, non-conductive material, adhesive).
• the epoxy resins used for the insulating tape composition are known from the prior art, which in turn preferably already for the
• Impregnating resin mixture mentioned polymers namely one or more
• Epoxy resin components selected from the group of the polyepoxides based on bisphenol A and / or F and advancement resins produced therefrom, based on epoxidized halogenated bisphenols and / or epoxidized novolaks and / or polyepoxide esters based on phthalic acid, hexahydrophthalic acid or on the basis of Terephthalic acid, epoxidized polyaddition products of dicyclopentadiene and phenol or cycloaliphatic compounds can be used.
• novolaks instead of epoxy resin components for the production of the mica tape.
• These are known from the prior art. They are prepared by condensation of a substituted or unsubstituted phenol with an aldehyde, wherein the obtained novolak a
• novolaks used according to the invention are e.g. under the name Bakelite * PH 8505 (product of Hexion GmbH).
• Impregnating resin mixture located epoxy resin can be used.
• the composition of the insulating tape for the inventive use BCl 3 and / or BCl 3 complexes and / or a compound selected from the group of imidazoles, preferably 1 to 30 wt.%, Again preferably 3 to 30 wt.%, Based on the mass of the epoxy resin component or of the novolak.
• Compounds cause the start of the homopolymerization of the impregnating resin mixture and accelerate the curing process of all impregnated layers, whereby the curing time can be optimized.
• composition of the insulating tape may optionally contain further additives, such as e.g. Processing aids (e.g., solvents such as e.g.
• the composition advantageously contains by way of example 50-90% by weight of an epoxy resin component or a novolak, 1-30% by weight of BCl 3 and / or BCl 3 complexes and / or a compound selected from the group of imidazoles and 0-49% by weight. % other additives, based on the total mass of all components of the
• the insulating tape coated with the composition is wound around the conductor to be insulated.
• Impregnating process soaked in the heated (about 40-80 ° C) impregnating resin mixture the a) at least one epoxy resin selected from the group of polyepoxides based on bisphenol A and / or F and advancement resins produced therefrom, based on epoxidized
• Epoxy resin component, lactones and additives are also used.
• the combination of the insulating tape comprising at least one epoxy resin component or a novolak and BCl 3 and / or BCl 3 complexes and / or a compound selected from the group of imidazoles with the impregnating resin, the at least one Epoxidharzkomponente and as Reaktiwerschreibner 2 to 30
• Wt.% Lactones contains, for a process for the preparation for the isolation of a conductor can be dispensed with the use of health hazardous carboxylic acid anhydrides.
• the impregnating resin mixture has the desired viscosity and latency to ensure a good impregnation of the wound with the insulating tape conductor.
• step (III) is carried out under vacuum (VPI method), whereby an almost complete impregnation of the composite of the wound with insulating tape conductor is ensured with the impregnating resin mixture. After impregnation usually completes a cure in one
• Drying oven in a temperature range of 80 oC to 180 oC, depending on the impregnating resin used.
• Table 2 shows that the viscosity of the mixture at 40 ° C with BF 3 -lsopropylamin within 7 days increases significantly more than the viscosity of the mixture at 40 ° C with BCl 3 - dimethyloctylamine.
• impregnating resin mixtures with BCl 3 -dimethyloctylamine have a significantly lower viscosity over a long period of time than mixtures with BF 3 -isopropylamine, which, although containing resin and hardener, brings about an advantage in terms of storage stability of the impregnating resin mixture.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
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• Engineering & Computer Science (AREA)
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• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Organic Insulating Materials (AREA)
• Epoxy Resins (AREA)
• Insulating Bodies (AREA)
• Reinforced Plastic Materials (AREA)

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