| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lubricating oil having a large oil film thickness, a high pressure-viscosity coefficient and a large pressure-velocity product (PV value), as a lubricating oil for use in rolling contact or rolling and sliding contact systems such as roller bearings and gears, in particular, a lubricating oil for use in rolling contact or rolling and sliding contact systems where a load (weight) is applied. <P>SOLUTION: The lubricating oil composition suitable as a bearing oil for high-speed rotation is obtained by adding a hydroxy group-added poly(meth)acrylate (B) to a base oil (A). More preferably, the lubricating oil composition contains one of or both of alkyl naphthalene (C) and a phosphorus-containing carboxylic acid compound (D). The base oil preferably has a %CA of not more than 10 and a ratio of %CN and %CP (%CN/%CP) of not less than 0.4. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
