Compositions – Electrolytes for electrical devices
Patent
1993-06-23
1995-10-31
Johnson, Jerry D.
Compositions
Electrolytes for electrical devices
C10M11508
Patent
active
054626846
ABSTRACT:
A grease composition for a high-speed rolling bearing contains an alkyl diphenyl ether oil as a base oil, and at least one of diurea compounds represented by the formula (1) ##STR1## wherein R.sup.1 denotes a divalent aromatic hydrocarbon residue having 6 to 15 carbon atoms and R.sup.2 and R.sup.3 may be the same or different and each represent a cyclohexyl group, a cyclohexyl derivative group having 7 to 12 carbon atoms or an alkyl group having 8 to 20 carbon atoms. The diurea compound is contained as a thickener in the base oil. The content in percent of the cyclohexyl group and the cyclohexyl derivative group in the diurea compound is such that a value of [{(numbers of cyclohexyl groups and derivative groups thereof)/(numbers of cyclohexyl groups and derivative groups thereof plus numbers of alkyl groups)}.times.100] is equal to 50 to 100%.
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Kinoshita Hirotugu
Koizumi Hideki
Mishima Masaru
Naka Michiharu
Takahashi Yuzo
Johnson Jerry D.
Nippon Oil Co. Ltd.
NSK Ltd.
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