| abstract |
A lubricating composition includes (A) an esterified copolymer comprising units (A1) derived from a vinyl monomer and units (A2) derived from a carboxylic acid monomer, the vinyl monomer comprising a vinyl aliphatic monomer, the carboxylic acid monomer comprising an ethylenically unsaturated carboxylic acid or derivative thereof, esterified with a primary alcohol; and (B) a diene rubber copolymer comprising at least a first block (B1) derived from a conjugated diene monomer and at least a second block (B2) derived from a vinyl aromatic monomer. A ratio of the diene rubber copolymer to the esterified copolymer in the lubricating composition (B:A) is from 0.01 to 0.9, by weight. |