Low sediment method for preparing copper salts of...

Details Low sediment method for preparing copper salts of... Low sediment method for preparing copper salts of...

C - Chemistry, Metallurgy

07

C

402/313, 260/519

C07C 51/41 (2006.01) C07C 57/13 (2006.01) C08F 8/44 (2006.01) C08F 210/00 (2006.01) C08F 222/02 (2006.01)

Patent

CA 2030279

The present invention is directed to a low sediment method of producing oleaginous compositions captaining copper salts of the product of a polyolefin having a numerical average molecular weight (~ n) of at least 600 which has been substituted with an average of at least 0.5 dicarboxylic acid anhydride moiety per polyolefin molecule, wherein the polyolefin-substituted dicarboxylic acid anhydride is contacted with a water-soluble copper reactant in the presence of at least 1,000 wt.% above the amount theoretically required to hydrolyze the polyolefin-substituted dicarboxylic acid anhydride material charged) and in the presence of a solvent for the polyolefin-substituted dicarboxylic acid anhydride material charged. The resulting copper salt products, and amine derivatives thereof, are useful in lubricating oils as additives, e.g., as antioxidant tube oil additives.

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