Patent ID: 7902130

Claim:
A composition comprising the product prepared by heating together: (a) a dispersant; and (b) a 1,3-dicarboxylic acid or 1,4-dicarboxylic acid of an aromatic compound, or a reactive equivalent thereof, wherein the dicarboxylic acid (b) comprises terephthalic acid; and at least one of: (c) 2,5-dimercapto-1,3,4-thiadiazole or a hydrocarbyl-substituted 2,5-di-mercapto-1,3,4-thiadiazole, or an oligomer thereof; (d) a borating agent; and (e) a phosphorus acid compound, or a reactive equivalent thereof; said heating being sufficient to provide a reaction product of (a), (b), and (c), (d), or (e) which is soluble in an oil of lubricating viscosity.