Methods for the manufacture and use of electrically conductive compositions and devices
AssigneeDelphic Research Laboratories, Inc.
InventorHarold Ellis
Life of this patent
Estimating the term…
Abstract
An electrically conductive composition comprises a particulate, homogeneous blend of: A. about 60% to about 98% by weight of graphite: B. about 1.5% to about 20% by weight of manganese dioxide; and C. about 0.5% to about 20% by weight of zinc oxide, based on total weight of said blend. These compositions are suitable for the manufacturing of coating compositions, heating elements and structures which are useful where radiant, conductive, or convective heating is required, and for other applications which utilize the sheet and volumetric electrical conductivity properties of the formulations made therefrom.
Claims34
A process for the preparation of an electrically conductive coating composition comprising a particulate component and a vehicle, said process comprising preparing a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend;
- and mixing said blend with an organic or inorganic vehicle which does not dissolve said particulate blend, to thereby form a homogeneous composition suitable for application to a substrate and capable of being adhered thereto, and which when cured thereon forms an infrared radiating coating when an electric current is passed through said coating.
A process for the preparation of an electrically conductive coating composition, said process comprising preparing a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend;
- and mixing said blend with a solid, particulate binder, to thereby form a homogeneous composition suitable for application to a substrate and capable of being adhered thereto, and which when cured thereon forms an infrared radiating coating when an electric current is passed through said coating.
A process for the preparation of an electrically conductive coating composition, said process comprising preparing a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend;
- and mixing said blend with a vehicle comprising a binder capable of forming a film, wherein said vehicle does not dissolve said particulate blend, said binder being a silicone resin, to thereby form a homogeneous composition suitable for application to a substrate and capable of being adhered thereto, and which when cured thereon forms an infrared radiating coating when an electric current is passed through said coating.
Process of heating a solid, liquid, gas or combinations thereof by conduction, convection, radiation or combinations of these means, said process comprising applying an electrical potential between at least 2 electrodes contained in a device comprising a dielectric substrate having thereon a layer of substantially uniform thickness and said at least two electrodes in contact with said layer, said layer comprising an electrically conductive composition comprised of a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend.
Process for manufacturing a heating device, said process comprising providing a dielectric substrate with an infrared radiating layer of uniform thickness, said layer comprising a coating composition comprised of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend;
- and an organic or inorganic vehicle which does not dissolve said particulate blend;
- and evaporating any volatile components present in said vehicle.
Process for signalling, information transmission and status reporting comprising applying an electrical potential between at least two electrodes contained in a device comprising a dielectric substrate having thereon a layer of substantially uniform thickness and said at least two electrodes in contact with said layer, said layer comprising an electrically conductive composition comprised of a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend;
- to thereby generate infrared radiation;
- and sensing said radiation.
Process for transmitting an electrical current and providing electrical continuity, said process comprising applying an electrical potential between at least two electrodes contained in a device comprising a dielectric substrate having thereon a layer of substantially uniform thickness and said at least two electrodes in contact with said layer, said layer comprising an electrically conductive composition comprised of a particulate, homogeneous blend of:
- A. about 60 to about 98% by weight of graphite,
- B. about 1.5 to about 20% by weight of manganese dioxide, and
- C. about 0.5 to about 20% by weight of zinc oxide, each of said percentages based on the total weight of said blend.
Dependencies are inferred from the claim text.