EP4047620A1 - Système d'isolation comportant une matière isolante solide et une résine d'imprégnation - Google Patents

Système d'isolation comportant une matière isolante solide et une résine d'imprégnation Download PDF

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Publication number
EP4047620A1
EP4047620A1 EP21158485.9A EP21158485A EP4047620A1 EP 4047620 A1 EP4047620 A1 EP 4047620A1 EP 21158485 A EP21158485 A EP 21158485A EP 4047620 A1 EP4047620 A1 EP 4047620A1
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EP
European Patent Office
Prior art keywords
copolymer
polyetherimide
insulation
blend
insulation system
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.)
Pending
Application number
EP21158485.9A
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German (de)
English (en)
Inventor
Steffen Lang
Marek Maleika
Niels Müller
Florian Schemmel
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.)
Siemens AG
Siemens Mobility GmbH
Original Assignee
Siemens AG
Siemens Mobility GmbH
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 Siemens AG, Siemens Mobility GmbH filed Critical Siemens AG
Priority to EP21158485.9A priority Critical patent/EP4047620A1/fr
Priority to CN202280016421.6A priority patent/CN116982121A/zh
Priority to PCT/EP2022/053682 priority patent/WO2022175268A1/fr
Priority to EP22706788.1A priority patent/EP4272230A1/fr
Priority to US18/547,263 priority patent/US20240153668A1/en
Publication of EP4047620A1 publication Critical patent/EP4047620A1/fr
Pending legal-status Critical Current

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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
    • H01B3/307—Other macromolecular compounds
    • 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
    • H01B3/40—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
    • 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
    • H01B3/427—Polyethers
    • 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
    • H01B3/46—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 silicones

Definitions

  • the invention generally relates to the field of insulating electrical conductors against partial discharge in the medium and high voltage range.
  • the invention relates to an insulation system for an electrical machine, in particular a rotating electrical machine such as an electric motor and/or a generator.
  • Electrical machines such as motors and generators in the medium and high voltage range, have electrical conductors, a main insulation and a laminated stator core.
  • the purpose of the main insulation is to electrically insulate the conductors from each other, from the stator core and from the environment.
  • so-called "treeing" channels can form in the main insulation due to electrical partial discharges TEs. Electrical breakdown through the main insulation can occur as a result of the "treeing" channels.
  • electrical discharges do not necessarily occur during operation, so that there is no need for a barrier against partial discharges.
  • “Medium and high voltage range” is understood here to mean the electrical power engineering that works with a high voltage in the range of over 700V - up to and including 52kV. This also includes the insulation systems, which are of interest for the fast-charging drive systems in the automotive industry.
  • a barrier in the form of a surface insulation material against partial discharges has mainly been achieved by using mica in the main insulation, which has a high resistance to partial discharges.
  • the mica will in the form of platelet-shaped mica particles with a conventional particle size of several 100 micrometers up to several millimeters into a mica paper, which is then placed on a carrier, such as a glass fiber fabric and/or insulating film, and glued, so that the mica particles cover the surface insulation material in the form of result in a broad mica web.
  • a mica tape is cut from this broad sheet of mica and wound around the conductor to produce the main insulation.
  • the electrical insulation mica winding tape is impregnated with a liquid synthetic resin and the synthetic resin is then cured.
  • Insulation systems are known, such as the system known under the brand name " Micalastic® ", in which the main insulation, comprising a mica wrapping tape as surface insulation material, is impregnated with a bisphenol epoxy resin in a vacuum-pressure impregnation process.
  • Micalastic ® is also from the EP2763142A1 and the EN102011083228A known.
  • nanoscale particles which are dispersed in the synthetic resin before impregnation, is known to improve the partial discharge resistance of the main insulation.
  • the presence of the particles shortens the pot life of the synthetic resin, which is reflected in particular in a progressive polymerization of the synthetic resin before impregnation.
  • the production of the surface insulation material as a slot lining and/or in the form of a broad sheet of mica and/or a mica strip is complex and expensive.
  • mica-containing laminates with, for example, mAramid and polyimide as carrier material have also been used for traction motors for slot linings due to the requirements.
  • traction motors In order to get maximum performance out of the machine, it is operated at the highest possible current densities, which also results in significant losses in the form of heat.
  • Traction motors are operated at comparatively high temperatures, in particular at temperatures above 150°C.
  • polyetherimide-siloxane copolymers can be produced flatly as a film by suitable extrusion processes, which in turn have sufficient elasticity to be used as winding tapes - already cut - but as winding tapes in the operating temperature range of over 150 ° C, in particular over These wrapping tapes cannot be used at temperatures of 170°C.
  • the subject of the present invention is an insulation system comprising a solid insulation material in the form of a surface insulation material and a synthetic resin, the surface insulation material being present as a film and a blend of a copolymer of a polyetherimide with a siloxane with a high-temperature thermoplastic, such as Polyimide, and the synthetic resin is a duromer with which the surface insulation material is impregnated and then cured.
  • the general finding of the invention is that a mixture of a copolymer, in particular a siloxane-polyetherimide copolymer, with a high-temperature thermoplastic in the blend--for example also with one of the reactants of the copolymer as a blend partner--results in a stable mixture that is suitable for film production .
  • High-temperature thermoplastics are used as blend partners for the copolymer, such as polyetheretherketone (PEEK), polyaryletherketone (PAEK), polyphenylene ether (PPE), polyoxymethylene (POM), perfluoroalkoxy polymer (PFA), polyvinylidene fluoride PVDF, polyetherketone PEK, polyetherketoneketone PEKK, polytetrafluoroethylene PTFE , polyphenylene sulfone PPSU, polyether sulfone PES, polysulfone PSU, poly(oxy-1,4-phenylsulfonyl-1,4-phenyl) PESU, polyamideimide PAI, polybenzimidazole PBI and/or polyetherimide PEI.
  • PEEK polyetheretherketone
  • PAEK polyaryletherketone
  • PPE polyphenylene ether
  • POM polyoxymethylene
  • PFA perfluoroalkoxy polymer
  • PVDF poly
  • PEI polysulfones
  • thermoplastics are: other polyimide(s), polyamideimide -PAI-, polyetherketone -PEK-, polyetheretherketone -PEEK-, polyetherketoneketone -PEKK-, polysulfone -PSU- and/or -PPSU-, polyphenylene sulfide -PPS-, polyethersulfone - PES- , poly(oxy-1,4-phenylsulfonyl-1,4-phenyl) -PESU-, polyaryletherketone -PAEK-.
  • thermoplastics mentioned can be used on their own and/or in any combinations and mixtures.
  • the high-temperature thermoplastics preferably contain an aromatic basic structure.
  • these compounds are firstly resistant to oxidation and secondly to the formation of free radicals. Both are very important, especially when partial discharge resistance is required.
  • the chain stiffness is also greater in the case of aromatic polymers, so that the glass transition temperature is higher.
  • a high-temperature thermoplastic as a blending partner can be partially crystalline, crystalline and/or amorphous - i.e. also as a mixture of these modifications.
  • Partially crystalline or crystalline high-temperature thermoplastics are preferred here as blend partners because they show particular stability with respect to oxidation, partial discharges and/or the formation of free radicals.
  • a polyetherimide-siloxane copolymer in particular has proven enormous potential as an insulating material in the medium and high voltage range with regard to resistance to thermal loads and also to partial discharges.
  • the softening point of the copolymer alone as a surface insulation material is only slightly above 170°C, so that it can be used as a surface insulation material in an insulation system at higher operating temperatures, in particular at operating temperatures above 180°C.
  • a blend according to the invention i.e. the blending of the copolymer with a high-temperature thermoplastic in an amount of, for example, 1 to 90% by weight, results in a surface insulation material which can be processed as a film because it shows no segregation problems and is meant in a temperature range can be used at an operating temperature of the electrical machine of, for example, 170°C up to 250°C.
  • drive motors and traction motors are electric rotating machines that are operated at high temperatures, ie temperatures above 155°C.
  • Polymers that are mixtures with high-temperature thermoplastics are known, but they are often mixtures of polymers that separate again during production of the film, ie when the film is drawn. Therefore, when adding a blending partner, attention must be paid to the reactivity of the side groups, and it has been shown that the polar side groups of the copolymer are advantageously combined with a thermoplastic that also has polar side groups, particularly in the production of surface insulation materials in the form of films.
  • polysulfones such as polyphenylene sulfones and polyether sulfones as blend partners for a copolymer of polyetherimide and siloxane.
  • the partial discharge resistance is evaluated using a surface profilometer by determining the specific erosion volume after electrical aging. This is carried out based on IEC 60343.
  • the experimental setup and test conditions can be found in the publication: n. miller; Slang; R.Moos: "Influence of ambient conditions on electrical partial discharge resistance of epoxy anhydride based polymers using IEC 60343 method". Transactionson Dielectrics and Electrical Insulation 2019 .
  • the polyetherimide-siloxane copolymer is a block copolymer.
  • the proportion of siloxane in the copolymer is in the range from 0.1% by weight to 90% by weight, in particular from 10% by weight to 60% by weight and in particular from 20% by weight to 40% by weight, based on the total weight of the copolymer.
  • the atomic proportion of silicon atoms in the copolymer is 0% to 30% atomic percent, in particular 0% to 25%, in particular 0% to 15%.
  • one or more additives can be contained in the copolymer.
  • Further additives can be Fe 2 O 3 and/or MnFe 2 O 4 and/or electrically non-conductive carbon-based fillers such as carbon black as additives. If necessary, the additive particles can be equipped with an SiO 2 coating partially or completely, over the entire surface or over part of the surface.
  • these additives also inhibit oxidation, so that the thermal class or the temperature index of a surface insulation material produced with them can be further increased.
  • Additives are mixed in, for example, during the production of the blend.
  • additives can be added to the blend and/or the impregnating agent to produce the insulation system.
  • siloxane is basically understood to mean a compound with at least one —Si—O—Si unit, in particular those which form an Si—O—Si backbone in the polymer, as is customary in silicones.
  • a polydialkylsiloxane such as polydimethylsiloxane or polydiarylsiloxane such as polydiphenylsiloxane are simple forms of a siloxane.
  • siloxanes such as a polyarylalkylsiloxane.
  • PEI polyetherimide
  • ULTEM® ULTEM®
  • the polyetherimide is used once to form the copolymer with siloxane, ie the monomers of the polyetherimide and the monomers of the siloxane are cured together to form a polymer.
  • the polyetherimide is used as a high temperature thermoplastic for blending the copolymer to form the blend according to one embodiment of the invention.
  • blend also known as polyblend
  • polyblend The formation of the blend, also known as polyblend, is achieved by simply mixing the two components, copolymer on the one hand and high-temperature thermoplastic on the other.
  • a blend in this sense is a purely physical mixture, there are no new chemical bonds between the macromolecules.
  • a duromer is used as the impregnation resin for forming the synthetic resin of the insulation system and for impregnating the winding tape insulation and/or the slot box made of a surface insulation material according to the invention.
  • a surface insulation material for example, polyester, formaldehyde, epoxide, novolak, silicone, polyesterimide, polyurethane and any mixtures, blends and copolymers of the aforementioned compounds can be used.
  • Impregnating resins for slot linings and/or Wrapping tape insulation is generally known, inter alia from the patent specifications mentioned above. The solid insulation materials are impregnated with these impregnating resins and the resin is then cured to complete the insulation system.
  • Fillers can be added both to the impregnating resin and to the blend of a copolymer with a high-temperature thermoplastic. Silicon dioxide nanoparticles, which further increase the partial discharge resistance of the insulation system, have proven particularly useful for increasing the silicon content.
  • a polyetherimide-siloxane copolymer is available under the trade name "Siltem TM ", which has already been successfully mixed with thermoplastics to form a blend and then used and tested.
  • the Siltem is an amorphous thermoplastic polyetherimide siloxane copolymer and combines the temperature resistance of PEI with the flexibility of a silicone elastomer.
  • As a blend with a high-temperature thermoplastic, in particular with a partially crystalline high-temperature thermoplastic it exhibits good processing properties to give a film, for example by a conventional extrusion process.
  • the figures 1 and 2 show the surface of two test specimens with insulation systems, each showing a solid surface insulation material impregnated with a synthetic resin, which was cured after impregnation was complete. Both figures show the test specimen after electrical aging.
  • Figure 1 shows the erosion of the insulation system made with pure polyetherimide and in figure 2 the erosion of - according to one embodiment of the invention - from a blend of a polyetherimide-siloxane copolymer with a thermoplastic - shown as a solid surface insulation material produced insulation system under the same conditions.
  • the insulation system with pure PEI under the conditions mentioned below, a circle forms around the centrally arranged conductor with an erosion depth of up to 80 ⁇ m caused by partial discharges, whereas under the same conditions the test specimen of the figure 2 , with the insulation system produced identically except for the solid insulation material, which comprises the copolymer according to the invention as a solid insulation material, in the tested case the commercial product Siltem ® and/or Ultem ® STM 1600 as a PEI siloxane copolymer, also circular aging, but only with an erosion depth between -1 ⁇ m and -8 ⁇ m.
  • the present invention brings a quantum leap in insulation technology, since here for the first time the expensive mica-containing insulation material, which is difficult to produce, can be dispensed with.
  • the copolymer-thermoplastic blend presented here for the first time as a mica substitute is particularly suitable as a surface insulating material, both for winding tape insulation and for flat insulation, for example slot lining in the use of motors, both for traction and as a drive motor, but also for generators such as a wind power generator. Due to its excellent stretch properties, it expands the design spectrum of - for example - traction motors.
  • a film according to one embodiment of the invention produced, for example, by surface extrusion, insulates, for example, the coils and/or the wires of the winding of an electric motor. These coils are then placed in the slots of a laminated core and then impregnated with an impregnating resin, such as a polyesterimide and/or a silicone.
  • an impregnating resin such as a polyesterimide and/or a silicone.
  • An insulation system comprises, for example, a laminate with one or more films made of polyetherimide-siloxane copolymer, for example also processed into laminates with carriers and/or protective films - e.g. connected with mAramid or polyimide as carrier material.
  • a “foil” is understood to be a flat layer made of a material.
  • the foil is a layer and not a stack of layers.
  • the wall thickness of a foil is typically between 1 ⁇ m and 0.7 mm, for example between 2 ⁇ m and 0.5 mm.
  • a “laminate”, on the other hand, is usually a stack of layers comprising one or more foils or papers. can the layers lie one on top of the other over the entire surface - ie all layers of foils - or over part of the surface, ie at least one layer with, for example, a lattice and/or randomly distributed fibers and/or network structure.
  • a laminate it can also be sufficient to connect a film to a fabric or a scrim, for example a glass fiber scrim.
  • a "laminate” is a stacking and/or a composite of at least two layers or films, for example at least one carrier and/or protective film and/or paper, e.g. made of maramid or polyimide, with at least one film made of the blend thermoplastic copolymer , Roger that.
  • the simple films made of copolymer-thermoplastic blend as surface insulation material can tear, so it is better to use laminates with relatively tear-resistant films or papers for the blend of thermoplastic and Copolymer to use as insulation.
  • the laminates are cut into tapes, for example, and used in insulation systems.
  • insulation of a slot for an electric motor can also and/or additionally be processed over its entire length by a surface insulation material made from a polyetherimide-siloxane copolymer high-temperature thermoplastic blend in a thick film and/or as a laminate, e.g. in combination with e.g. mAramid papers and/or polyimide foils, can be protected as a slot lining.
  • a surface insulation material made from a polyetherimide-siloxane copolymer high-temperature thermoplastic blend in a thick film and/or as a laminate, e.g. in combination with e.g. mAramid papers and/or polyimide foils, can be protected as a slot lining.
  • the thickness of a surface insulation material made from a film that is present as a tape is, for example, in the range from 1 ⁇ m to 250 ⁇ m, in particular between 20 ⁇ m and 220 ⁇ m, very preferably in the range between 25 ⁇ m and 200 ⁇ m.
  • the thickness of a surface insulation material made of a foil that is present as a slot lining is, for example, in the range from 70 ⁇ m to 500 ⁇ m, in particular between 90 ⁇ m and 300 ⁇ m, very preferably in the range between 100 ⁇ m and 450 ⁇ m.
  • the winding from the foil is placed in the grooves and the entire winding is in turn covered with an impregnating resin made from a duromer that is filled or unfilled, electrically insulating or electrically conductive - for example when producing a corona protection system such as External corona protection, impregnated.
  • the invention provides for the first time a replacement for the mica conventionally used as a barrier material in an insulation system such as the main insulation of rotating electrical machines such as motors and/or generators.
  • the substitute is based on a blend of a copolymer, in particular a polyetherimide-siloxane copolymer, with a high-temperature thermoplastic that can be processed over a large area, for example via flat extrusion.
  • Foils are produced that are processed in foil form or as a laminate, cut as flat insulation materials or as tapes, can be used in insulation systems as winding tape insulation and/or as useful linings.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
EP21158485.9A 2021-02-22 2021-02-22 Système d'isolation comportant une matière isolante solide et une résine d'imprégnation Pending EP4047620A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21158485.9A EP4047620A1 (fr) 2021-02-22 2021-02-22 Système d'isolation comportant une matière isolante solide et une résine d'imprégnation
CN202280016421.6A CN116982121A (zh) 2021-02-22 2022-02-15 包含固体绝缘材料和浸渍树脂的绝缘系统
PCT/EP2022/053682 WO2022175268A1 (fr) 2021-02-22 2022-02-15 Système d'isolation comprenant un matériau isolant solide et une résine d'imprégnation
EP22706788.1A EP4272230A1 (fr) 2021-02-22 2022-02-15 Système d'isolation comprenant un matériau isolant solide et une résine d'imprégnation
US18/547,263 US20240153668A1 (en) 2021-02-22 2022-02-15 Insulating System Comprising a Solid Insulating Material and Impregnating Resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21158485.9A EP4047620A1 (fr) 2021-02-22 2021-02-22 Système d'isolation comportant une matière isolante solide et une résine d'imprégnation

Publications (1)

Publication Number Publication Date
EP4047620A1 true EP4047620A1 (fr) 2022-08-24

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EP21158485.9A Pending EP4047620A1 (fr) 2021-02-22 2021-02-22 Système d'isolation comportant une matière isolante solide et une résine d'imprégnation
EP22706788.1A Pending EP4272230A1 (fr) 2021-02-22 2022-02-15 Système d'isolation comprenant un matériau isolant solide et une résine d'imprégnation

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Application Number Title Priority Date Filing Date
EP22706788.1A Pending EP4272230A1 (fr) 2021-02-22 2022-02-15 Système d'isolation comprenant un matériau isolant solide et une résine d'imprégnation

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US (1) US20240153668A1 (fr)
EP (2) EP4047620A1 (fr)
CN (1) CN116982121A (fr)
WO (1) WO2022175268A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699336A1 (fr) * 1993-05-17 1996-03-06 Raychem Limited Composition polymere et isolant pour fil electrique
DE102011083228A1 (de) 2011-09-22 2013-03-28 Siemens Aktiengesellschaft Isoliersysteme mit verbesserter Teilentladungsbeständigkeit, Verfahren zur Herstellung dazu
EP2763142A1 (fr) 2013-02-04 2014-08-06 Siemens Aktiengesellschaft Résine d'imprégnation pour un corps d'isolation électrique, corps d'isolation électrique et procédé de fabrication du corps d'isolation électrique
WO2017037584A1 (fr) * 2015-09-02 2017-03-09 Sabic Global Technologies B.V. Compositions de polyétherimide, procédé de fabrication et articles préparés à partir de ces dernières
WO2020095268A1 (fr) * 2018-11-08 2020-05-14 Sabic Global Technologies B.V. Composition thermoplastique, fil électrique et article comprenant le fil électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699336A1 (fr) * 1993-05-17 1996-03-06 Raychem Limited Composition polymere et isolant pour fil electrique
DE102011083228A1 (de) 2011-09-22 2013-03-28 Siemens Aktiengesellschaft Isoliersysteme mit verbesserter Teilentladungsbeständigkeit, Verfahren zur Herstellung dazu
EP2763142A1 (fr) 2013-02-04 2014-08-06 Siemens Aktiengesellschaft Résine d'imprégnation pour un corps d'isolation électrique, corps d'isolation électrique et procédé de fabrication du corps d'isolation électrique
WO2017037584A1 (fr) * 2015-09-02 2017-03-09 Sabic Global Technologies B.V. Compositions de polyétherimide, procédé de fabrication et articles préparés à partir de ces dernières
WO2020095268A1 (fr) * 2018-11-08 2020-05-14 Sabic Global Technologies B.V. Composition thermoplastique, fil électrique et article comprenant le fil électrique

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Publication number Publication date
WO2022175268A1 (fr) 2022-08-25
CN116982121A (zh) 2023-10-31
EP4272230A1 (fr) 2023-11-08
US20240153668A1 (en) 2024-05-09

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