Patent ID: 6635605
Filing Date: 2003-10-21
Classification: C10M,C10N,H01R,H01T

Abstract:
In a silicone rubber spark plug boot having a boot cavity formed therein, said boot cavity being defined by cavity walls, said boot cavity having a dielectric lubricant disposed therein, the improvement comprising said dielectric lubricant comprising:(A) a phenyl-methyl siloxane having an average general formula Me3SiOâ€”(Me2SiO)xâ€”(MePhSiO)yâ€”SiMe3, wherein each Me represents a methyl group, each Ph represents a phenyl group, x has a value from 0 to about 0.25 and x+y=1; said phenyl-methyl siloxane having a viscosity at 25Â° C. from about 500 to about 10,000 centipoise; (B) a polytetrafluoroethylene powdered solid; and component (A) being present in an amount of 50 to 80 parts by weight and component (B) being present in an amount of 20 to 50 parts, by weight, per 100 parts by weight of the combined weights of (A) and (B).