| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grease composition containing polymers capable of imparting decreased water wash-off, prolonged longevity and increased water repellence. <P>SOLUTION: A grease composition contains: (a) an esterified polymer derived from monomers comprising (i) a vinyl aromatic monomer, (ii) an unsaturated dicarboxylic acid anhydride or derivatives therof; (b) a thickening agent; and (c) an oil of lubricating viscosity, wherein the esterified polymer contains titratable acid groups with a total acid number of at least about 4. The invention further relates to the process to make the composition and its use in grease to increase water resistance. <P>COPYRIGHT: (C)2012,JPO&INPIT |
