C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
253/113, 400/203
C10M 145/14 (2006.01) C08F 279/02 (2006.01) C10L 1/236 (2006.01) C10M 149/02 (2006.01) C10M 149/04 (2006.01) C10M 149/10 (2006.01)
Patent
CA 1221796
- i - Patent Application of JOSEPH MARTIN BOLLINGER for HYDROGENATED DIOLEFIN-LOWER ALKYL ACRYLATE OR METHACRYLATE VISCOSITY INDEX IMPROVING COPOLYMERS FOR LUBRICATING OILS D.N. 81-60 MSA/ets Abstract of the Disclosure This invention relates to hydrogenated diolefin-lower alkyl acrylate or methacrylate copolymers and the use of these copolymers to improve the viscosity index (VI) of lubricating oils. The preferred copolymer is a fully hydrogenated, high molecular weight copolymer of 1,3- butadiene and methyl methacrylate containing at least about 71 mole percent 1,3-butadiene. A pour point depressant, VI improving polymer additive for lubricating oils is provided by incorporating a higher alkyl methacrylate in the copolymer. Further, a dispersant VI improving copolymer for lubricating oils and a dispersant for hydrocarbon fuels prepared by graft polymerizing a polar, nitrogen-containing graft monomer onto the VI improver or pour point depressant VI improver is also provided.
443503
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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