| abstract |
A grease composition contains a polysiloxane, the organic substituents of which are methyl radicals, a higher fatty acid soap of lithium, an amount of a polyether which is sufficient to cause the lithium soap of the fatty acid to disperse into the polysiloxane, but insufficient to deleteriously affect the hightemperature properties of the grease, and a sufficient amount of a base to render the grease alkaline. The grease is made by heating together the polysiloxane, the polyether, the lithium soap of the higher fatty acid and the base to a temperature of about 400* to 500* F., after which the grease composition is cooled to room temperature, then milled. The grease composition is used in the journal bearings of starter motors having highcurrent capacity and which run hot but are subjected to extremely low temperatures when not running. |