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US 5,478,640 AGranted
Electrical insulating paper
AssigneeBASF SE
InventorsHeinz Berbner, Gernot Herbst, Karl Ott, Hans D. Zettler
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Abstract
A thermally stable electrical insulating material comprises melamine resin fibers and a polymer fibril binder with or without a synthetic resin powder and mineral fillers.
Claims7
A thermally stable electrical insulating paper comprising
- A. 15-95% by weight of synthetic resin fibers,
- B. 5-85% by weight of polymer fibrils,
- C. 0-30% by weight of a synthetic resin powder, and
- D. 0-80% by weight of mineral fillers, wherein the synthetic resin fibers A are made of a melamine-formaldehyde condensation product having a specific surface area (BET) of less than 1 (m.sup.2 .multidot.g.sup.-1) and wherein the polymer fibrils B have a specific surface area (BET) of greater than 3 (m.sup.2 .multidot.g.sup.-1).
1 more element
Dependencies are inferred from the claim text.