Patent ID: 6415104
Filing Date: 2002-07-02
Classification: C08L,H05B,H05K

Abstract:
An electrical resistance heating element for use in connection with heating a fluid medium, comprising:(a) an element body having a supporting surface thereon; (b) a resistance wire wound onto the supporting surface and connected to at least a pair of terminal end portions of the element; and (c) a thermally conductive polymeric coating disposed over the resistance wire and the supporting surface for hermetically encapsulating and electrically insulating the resistance wire from the fluid, wherein the polymeric coating is formed by subjecting a thermosetting composition comprising a polybutadiene or polyisoprene resin and based on the total composition, from about 5 to about 80% by weight of a high thermal conductivity filler to a high temperature cure at a temperature greater than about 250Â° C. and less than the decomposition temperature of the composition.