# US 2018/0022897 A1 · Insulating Tapes For A Coil And Wrapping Tape Insulation Systems For Electric Machines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022897 A1 - Document ID: US20180022897A1 - Status: Published application - Kind: A1 - Application number: 15/548,319 - Filed: 2016-01-19 - Published: 2018-01-25 - Earliest claimed: 2015-02-05 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: Juergen HUBER; Dieter SCHIRM; Matthias UEBLER - Web page: https://patentgrep.com/patent/US20180022897A1 ## CPC - C08K 5/3445: Five-membered rings - C08G 59/245: {aromatic} - C08G 59/5073: {having two nitrogen atoms in the ring} - C08G 59/58: with polycarboxylic acids or with anhydrides, halides, or low-molecular-weight esters thereof - C08J 3/075: Macromolecular gels - C08J 3/203: {Solid polymers with solid and/or liquid additives} - H01B 3/40: epoxy resins - H02K 3/30: Windings characterised by the insulating material - H02K 3/40: for high voltage, e.g. affording protection against corona discharges - C08J 2363/02: Polyglycidyl ethers of bis-phenols - C08K 2201/001: Conductive additives - C08K 2201/002: Physical properties - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An insulating tape having a tape adhesive comprising at least one tape accelerator. The tape accelerator may be comprised of an imidazole, an imidazole derivative, a pyrazole, a pyrazole derivative, and combinations thereof. The tape is particularly useful for insulation for stator coils of electrical machines. ## Claims ### Claim at position 1 1-9. (canceled) ### Claim 10 An insulating tape comprising a tape adhesive including at least one tape accelerator in solution and/or in ultrafine divided form, wherein the at least one tape accelerator is selected from the group consisting of imidazoles, imidazole derivatives, pyrazoles, pyrazole derivatives and combinations thereof. ### Claim 11 (depends on 10) The insulating tape as claimed in claim 10, wherein the tape accelerator is an adduct of at least one imidazole and/or at least one pyrazole with one or more acrylates. ### Claim 12 (depends on 10) The insulating tape as claimed in claim 10, wherein the tape accelerator is an adduct of one or more imidazoles with one or more acrylates, wherein the imidazoles are selected from the group consisting of 1H-2-methylimidazole (CAS No. 693-98-1), 1H-imidazole (CAS No. 288-32-4), 1H-2-ethylimidazole (CAS No. 1072-62-4), 1H-2-propylimidazole (CAS No. 50995-95-4), 1H-2-isopropylimidazole (CAS No. 36947-68-9), 1H-2-butylimidazole (CAS No. 50790-93-7), 1H-2-isobutylimidazole (CAS No. 61491-92-7), 1H-2-tert-butylimidazole (CAS No. 36947-69-0), 1H-4-tert-butylimidazole (CAS No. 21149-98-4), 1H-4(5)-methylimidazole (CAS No. 822-36-6), 1H-2-ethyl-4-methylimidazole (CAS No. 931-36-2), 1H-4-methyl-2-phenylimidazole (CAS No. 827-43-0), 1H-4-phenylimidazole (CAS No. 670-95-1), 1H-2-phenylimidazole (CAS No. 670-96-2), and 1H-5-methyl-2-phenylimidazole-4-methanol (CAS No. 13682-32-1. ### Claim 13 (depends on 10) The insulating tape as claimed in claim 10, wherein the tape accelerator is an adduct of one or more pyrazoles with one or more acrylates, wherein the pyrazoles are selected from the group consisting of 1H-3-phenylpyrazole (CAS No. 2458 26 6), 1H-5-methylpyrazole, 1H-3,4-dimethylpyrazole (CAS No. 2820 37 3), 1H-3-tert-butylpyrazole (CAS No. 15802 80 9), 1H-4-ethylpyrazole (CAS No. 17072 38 7), 1H-pyrazole (CAS No. 288 3 1) and 1H-3,5-dimethylpyrazole (CAS No. 67 51 6). ### Claim 14 (depends on 10) The insulating tape as claimed in claim 10, wherein the tape accelerator is an adduct of one or more imidazoles and/or of one or more pyrazoles with one or more acrylates selected from the group consisting of trimethylolpropane triacrylate (TMPTA), trimethylolpropane propoxylate triacrylate, pentaerythritol tetraacrylate (PETA), and dipentaerythritol pentacrylate/dipentaerythritol hexacrylate. ### Claim 15 (depends on 12) The insulating tape as claimed in claim 12, wherein the tape accelerator is an adduct of one or more imidazole derivatives with one or more acrylates selected from the group consisting of trimethylolpropane triacrylate (TMPTA); trimethylolpropane propoxylate triacrylate; pentaerythritol tetraacrylate (PETA); and dipentaerythritol pentacrylate/dipentaerythritol hexacrylate. ### Claim 16 (depends on 13) The insulating tape as claimed in claim 13, wherein the tape accelerator is an adduct of one or more pyrazole derivatives with one or more acrylates selected from the group consisting of trimethylolpropane triacrylate (TMPTA); trimethylolpropane propoxylate triacrylate; pentaerythritol tetraacrylate (PETA); and dipentaerythritol pentacrylate/dipentaerythritol hexacrylate. ### Claim 17 (depends on 10) The insulating tape as claimed in claim 10, wherein the tape accelerator is selected from the group of compounds of the structural formulae I to IV: wherein R is identical or nonidentical and R is selected from the group consisting of H, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, phenyl and/or mono-, di-, tri-, tetra-, and penta-substituted phenyl, wherein the substituents on the phenyl radical are identical or non-identical and are selected from the group consisting of alkyls (linear and branched), alkoxy, F, Cl, Br, I, aldehydes, ketones, acyl esters, acyl amides, phosphonic acid derivatives and sulfonic acid derivatives, and R2 is selected from the group consisting of H and ### Claim 18 A coil of an electric motor/generator comprising windings, wherein at least one of the windings has an insulating tape with impregnation, wherein the insulating tape comprises at least one imidazole, at least one pyrazole, at least one imidazole derivative, or at least one pyrazole derivative as a curing agent, as a gelling agent or as a tape accelerator. ### Claim 19 (depends on 10) An electrical machine, preferably a rotating electrical machine, more preferably a rotating electrical machine in the medium-voltage and high-voltage range, and electrical switching system, medium-voltage and high-voltage application, bushing, transformer bushing, generator bushing and/or HVDC bushing, and corresponding intermediate product, comprising an insulating tape as claimed in claim 10. ### Claim 20 A method for gelling or curing phthalic anhydride-free epoxy resins based on bisphenol A and/or bisphenol F diglycidyl ether, the method comprising impregnating the resins with at least one curing or gelling agent selected from the group consisting of imidazoles, pyrazoles, imidazole derivatives, pyrazole derivatives, and combinations thereof.