The Lubrizol Corporation

Edward Joe Friihauf

Donald Leon Murfin

Lubricant and fuel compositions characterized by improved demulsifying properties are disclosed, which properties are contributed substantially by an additive comprising a mixture of:

Demulsifier additive compositions for lubricants and fuels and

Lubricant compositions comprising (I), a viscosity improving agent, (II) a boron-containing dispersant, and (III) an ester of an aromatic carboxylic acid having six to ten carbon atoms in the aromatic nucleus and a total of 6 to 40 aliphatic and alicyclic carbon atoms as well as additive concentrates for making such lubricant compositions are disclosed. Preferably, (I) is a carboxy-containing interpolymer in which some carboxy radicals are esterified and the remaining carboxy radicals are neutralized with an amino compound and (II) is a borated, acylated polyamino compound, having an acyl group containing at least 50 carbon atoms. These lubricant compositions are useful as automatic transmission fluids and the like.

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Mentor, OH, United States of America

Edward Joe Friihauf