United States Patent Office Patented Nov
2,911,369 United States Patent Office Patented Nov. 3, 1959 1. 2 3% to about 500%, or more, and preferably from about 2,911,369 5% to about 200% based on the soap content of the HGH TEMPERATURE GREASE CONTAINING grease, of a basic compound such as basic alkali metal EE METAL BASE AND SILICONE POLYMER compounds, basic alkaline earth compounds, and high O - - 5 boiling basic organic nitrogen compounds, such as ali phatic or aromatic amines boiling above about 250 F. Stephen J. Zajac, Whiting, and Reuben A. Swenson, Ham Examples of suitable basic compounds are sodium hy mond, Ind., assignors to Standard Oil Company, Chi droxide, potassium hydroxide, lithium hydroxide, lithium cago, Ill., a corporation of Indiana oxide, barium hydroxide, barium oxide, calcium hy No Drawing. Application December 28, 1956 O droxide, calcium oxide, triphenyl amine, octylamine, etc. Serial No. 631,072 The silicone oil polymer employed is suitably, a poly 11 Claims. (C. 252-40) . meric liquid compound having the general formula i. R. This invention relates to high temperature greases and 15 R-Si-O-S-R. more. particularly pertains to alkali metal and alkaline R2 R4 earth metal soap greases having high temperature stability in which R1, R2, R3, Ra, and R5 are the same or different characteristics and to the method of preparing such hydrocarbon radicals, such as alkyl, aryl, alkaryl or greases. aralkyl radicals and n is an integer greater than 1. De It is an object of the present invention to provide a 20 pending upon the extent of condensation or polymeri lubricating grease which is stable at high temperatures zation, the polymer products vary from relatively light with respect to consistency and which is resistant to leak liquids to solid resins.
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