C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 220/18 (2006.01) C08F 220/12 (2006.01) C08F 220/56 (2006.01) C08F 226/06 (2006.01) C08F 265/04 (2006.01) C10M 149/02 (2006.01) C10M 149/04 (2006.01) C10M 149/06 (2006.01) C10M 149/08 (2006.01) C10M 149/10 (2006.01)
Patent
CA 2179240
A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions. Specifically, the dispersant viscosity improvers of this invention are nitrogen-containing copolymers comprising units derived from (A) from about 5% to about 75% by weight of alkyl acrylate ester monomers containing from 1 to 11 carbon atoms in the alkyl group; (B) from about 25 % to about 95 % by weight of alkyl acrylate ester monomers containing from 12 to about 24 carbon atoms in the alkyl group; and (C) From about 0.1% to about 20% by weight of at least one nitrogen containing monomer selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N,N-dialkylaminoalkyl acrylate monomers, N,N-dialkylaminoalkyl acrylamide monomers and tertiary-alkyl acrylamides, provided that the total equals 100%. Processes for preparing the compositions, additive concentrates and lubricating oil compositions are described.
Bryant Charles Peterson
Cantiani Robert
Grisso Bryan Allers
Ridout & Maybee Llp
The Lubrizol Corporation
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