| abstract |
A fluid composition which is stable to heat and to oxidation has been developed. Said composition consists essentially of an aromatic carboxylic acid ester of the general formula (I) in which Ar represents an aromatic moiety, R represents a neohydrocarbyl group containing about 5 to 18 carbon atoms, provided that R is not not a cycloalkyl substituted neohydrocarbyl group. R1 represents a mono, di, tri, or tetra functional hydrocarbyl group containing 1 to about 18 carbon atoms, n is an integer between about 2 and 4 and represents the total number of carboxylic acid ester groups in the moiety aromatic, a is an integer between about 1 and 4, when a represents 1 R1 is monovalent, when a represents 2 R1 is divalent, when a represents 3 R1 is trivalent and when a represents 4 R1 is tetravalent. R2 represents a hydrocarbyl group derived from a diol containing from about 2 to 18 carbon atoms and x represents an integer from 0 to about 4. |