Base member coated with an electrically conductive silicone elastomer
AssigneeDow Corning Corporation
InventorsGerald P. Kehrer, William G. Smith
Life of this patent
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Abstract
It has been discovered that the addition of a small amount (less than 5 percent by weight) of chopped graphite fibers to an electrically conductive silicone elastomeric mixture increases the electrical conductivity to an unexpected degree. The electrically conductive silicone elastomeric mixture can be coated on a base member and cured to yield an electrically conductive device. An application of the technology is the manufacture of conductive core for use in automotive ignition cable. By using this electrically conductive silicone elastomeric mixture it is no longer necessary that the base member itself be conductive.
Claims6
A base member coated with a silicone composition curable to an electrically conductive silicone elastomer and cured, said composition comprising a product obtained by mixing
- (A) an electrically conductive curable silicone elastomeric mixture having a viscosity below 1,000 Pa.s at 25.degree. C. and
- (B) graphite fibers with an average length of from about 1 mm to about 6 mm, the graphite fibers being present in an amount of from 0.3% to 5.0% by weight based on the weight of the composition.
A filament coated with a silicone composition curable to an electrically conductive silicone elastomer and cured, said composition comprising a product obtained by mixing
- (A) an electrically conductive curable silicone elastomeric mixture having a viscosity below 1,000 Pa.s at 25.degree. C. and
- (B) graphite fibers with an average length of from about 1 mm to about 6 mm, the graphite fibers being present in an amount of from 0.3% to 5.0% by weight based on the weight of the composition.
An electrically conductive member comprising a plurality of filaments coated with a cured composition, said composition comprising a product obtained by mixing
- (A) an electrically conductive curable silicone elastomeric mixture having a viscosity below 1,000 Pa.s at 25.degree. C. and
- (B) graphite fibers with an average length of from about 1 mm to about 6 mm, the graphite fibers being present in an amount of from 0.3% to 5.0% by weight based on the weight of the composition to provide an electrically conductive silicone elastomeric surface encircling the plurality of filaments.
Dependencies are inferred from the claim text.