Polymeric electrical insulation materials
AssigneeWestinghouse Electric Corp.
InventorsJames D. B. Smith, Allan I. Bennett, Emil M. Fort
Life of this patent
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Abstract
Electrical insulation materials containing a synergistic mixture of either a metal acetylacetonate and a dicyclopentadienyl metal compound, a chromium salt and a dicyclopentadienyl compound, or a chromium salt and a metal acetylacetonate have unexpectedly high levels of corona resistance. The insulation materials preferably are prepared by dissolving the synergistic mixture in an organic resin such as an epoxy resin and then curing the resin.
Claims16
An electrical insulation material comprising:
- (1) electrically insulating polymer comprising epoxy, polybutadiene, urethane, acrylic, or polyethylene resin or a combination thereof;
- and
- (2) an amount of a synergistic mixture of:
- a metal acetylacetonate and a dicyclopentadienyl metal compound;
- or
- a chromium salt other than chromium acetylacetonate and a dicyclopentadienyl metal compound;
- said amount being soluble in said polymer and effective to improve the corona resistance of said polymer.
A method for preparing an electrical insulation material containing epoxy, polybutadiene, urethane, acrylic, or polyethylene resin or a combination thereof, comprising including in said material an amount of a synergistic mixture of:
- a metal acetylacetonate and a dicyclopentadienyl metal compound;
- or
- a chromium salt other than chromium acetylacetonate and a dicyclopentadienyl metal compound;
- said amount being soluble in said polymer and effective to improve the corona resistance of said material.
Dependencies are inferred from the claim text.