C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 220/18 (2006.01) C08F 220/14 (2006.01) C08F 220/34 (2006.01) C08F 220/60 (2006.01) C08L 33/10 (2006.01) C10M 145/14 (2006.01)
Patent
CA 2261458
A copolymer comprising units derived from (a) methacrylic acid esters containing from about 9 to about 25 carbon atoms in the ester group and (b) methacrylic acid esters containing from 7 to about 12 carbon atoms in the ester group, said ester groups having 2-(C1-4 alkyl)- substituents, and optionally (c) at least one monomer selected from the group consisting of methacrylic acid esters containing from 2 to about 8 carbon atoms in the ester group atoms and which are different from methacrylic acid esters (a) and (b), vinyl aromatic compounds, and nitrogen-containing vinyl monomers with the proviso that no more than 60% by weight of the esters contain not more than 11 carbon atoms in the ester group. Also described are additive concentrates and lubricating oil compositions containing the copolymers and processes for preparing copolymers.
Bryant Charles P.
Seebauer Joseph G.
Ridout & Maybee Llp
The Lubrizol Corporation
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