Tape accelerator and use thereof, solid insulating material, and anhydride-free insulation system
Various embodiments of the teachings herein include a cationic tape accelerator for use in a process for producing an insulation system by impregnation and/or encapsulation with an anhydride-free impregnating agent. The tape accelerator comprises an ionogenic compound of a sulfonium-containing cation and a hexafluoroantimonate anion.
1. A cationic tape accelerator for use in a process for producing an insulation system by impregnation and/or encapsulation with an anhydride-free impregnating agent, the tape accelerator comprising:
an ionogenic compound of a sulfonium-containing cation and a hexafluoroantimonate anion;
wherein the sulfonium-containing cation comprises a substituted aryl group comprising a phenyl ring which is acetyloxy-substituted.
2. The tape accelerator as claimed in claim 1 , wherein the sulfonium-containing cation includes an arylalkylsulfonium cation.
3. The tape accelerator as claimed in claim 1 , wherein the sulfonium-containing cation includes a dialkylarylsulfonium cation and/or a diarylalkylsulfonium cation.
4. The tape accelerator as claimed in claim 1 , having the following chemical structure:
5. A solid insulation material comprising:
a barrier material;
a tape adhesive; and
a tape accelerator comprising an ionogenic compound of a sulfonium-containing cation and a hexafluoroantimonate anion;
wherein the sulfonium-containing cation includes a substituted aryl group comprising a phenyl ring which is acetyloxy-substituted.
6. The solid insulation material as claimed in claim 5 , wherein the barrier material comprises platelets.
7. The solid insulation material as claimed in claim 4 , further comprising a carrier.
8. The solid insulation material as claimed in claim 7 , wherein the carrier comprises a weave, a nonwoven, a film, and/or a perforated film.
9. The solid insulation material as claimed in claim 5 , wherein the tape adhesive includes a thermoplastic polyvinylacetal and/or a liquid polyester with hydroxy groups and/or carboxyl groups.
10. The solid insulation material as claimed in claim 9 , wherein the tape adhesive includes a polyvinylacetal based on butyraldehyde and/or acetaldehyde.
11. An insulation system comprising:
a winding of a solid insulation material impregnated with an anhydride-free impregnating agent comprising:
a barrier material;
a tape adhesive; and
a tape accelerator comprising an ionogenic compound of a sulfonium-containing cation and a hexafluoroantimonate anion;
wherein the sulfonium-containing cation includes a substituted aryl group comprising a phenyl ring which is acetyloxy-substituted.
12. An electrical machine comprising an insulation system as claimed in claim 11 .