| 摘要 |
PROBLEM TO BE SOLVED: To provide a grease composition used for constant velocity joints, capable of efficiently lubricating constant velocity joints, reducing abrasion, and preventing oscillation, and to provide constant velocity joints containing the grease composition sealed therein. SOLUTION: The grease composition comprises the following components: (a) a base oil, (b) a diurea-based thickener represented by the following formula: R<SP>1</SP>-NH-CO-NH-C<SB>6</SB>H<SB>4</SB>-p-CH<SB>2</SB>-C<SB>6</SB>H<SB>4</SB>-p-NH-CO-NHR<SP>2</SP>(R<SP>1</SP>and R<SP>2</SP>are each 8-18C alkyl), (c) is molybdenum dialkyldithiocarbamate sulfide represented by the following formula, or (R<SP>3</SP>R<SP>4</SP>N-CS-S)<SB>2</SB>-Mo<SB>2</SB>O<SB>m</SB>S<SB>n</SB>[wherein R<SP>3</SP>and R<SP>4</SP>are each independently 1 to 24C alkyl, m is 0 to 3, n is 4 to 1, and m+n=4], (d) zinc dithiophosphate, (e) zinc dinonylnaphthalene sulfonate with a base value of 50 mgKOH/g or less, (f) a sulfur-phosphorus-based extreme-pressure agent, and (g) a castor oil and/or rapeseed oil. The constant velocity joints containing the composition sealed therein are provided. COPYRIGHT: (C)2010,JPO&INPIT |
