Method for preparing salts of polyolefinic substituted dicarboxy

Details Method for preparing salts of polyolefinic substituted dicarboxy Method for preparing salts of polyolefinic substituted dicarboxy

1989-02-06

1991-08-27

Willis, Prince E.

Compositions

Electrolytes for electrical devices

252 34, C10M12926

Patent

active

050430831

ABSTRACT:
The present invention is directed to methods of producing reduced viscosity oleaginous compositions containing Group I-B, II-A and II-B metal, particularly copper and/or zinc, salts of the product of a polyolefin having a number average molecular weight (M.sub.n) of at least 600 which has been substituted with at least one dicarboxylic acid producing moiety per polyolefin molecule, wherein the metal salt product is contacted with lower aliphatic, cycloaliphatic or aromatic amines having from 1 to 4 nitrogen atoms per molecule. The compositions of the present invention can also provide increased stability to viscosity growth, e.g. during storage of the materials prepared by the process of this invention. The resulting solutions are useful in lubricating oils as additives, e.g., as antioxidant lube oil additives.

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