Ethylene alpha-olefin polymer substituted mannich base...

C - Chemistry – Metallurgy – 08 – F

Patent

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253/110, 402/45,

C08F 8/28 (2006.01) C08F 8/00 (2006.01) C08F 8/32 (2006.01) C10L 1/22 (2006.01) C10L 1/24 (2006.01) C10M 145/20 (2006.01) C10M 159/16 (2006.01)

Patent

CA 2034694

The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl- moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of greater or above 20,000 to about 500,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as multifunctional viscosity index improvers for oleaginous compositions, particularly lubricating oil compositions.

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