| abstract |
1. A LUBRICATING COMPOSITON OF HIGH VISCOSITY INDEX SUITABLE FOR USE AS BASE LIBRICANT FOR MULTIGRADE OILS COMPRISING LUBRICATING AMOUNTS OF A MIXTURE OF (A) A HYDROCARBONOIL OF LUBRICATING VISCOSITY SELECTED FROM THE GROUP CONSISTING OF THE SOLVENT-REFINED MINERAL OILS, THE ACID-REFINED MINERAL OILS, THE HYDROREFINED OILS AND THE SYNTHETIC OILS OBTAINED BY OLIGOMERIZATION OF OLEFINIC HYDROCARBONS HAVING 2-20 CARBON ATOMS AND (B) AT LEAST ONE COMPOUND COMPLYING WITH THE GENERAL FORMULA: R1(-CO-O$R2-O$NR3)X)-CO-O-R''3)(M-X) WHERE M IS 2 OR 3, X IS FROM 0.15 M. TO M INCLUSIVE; WHEN M IS 2, R1 IS THE DIVALENT HYDROCARBON RADDICAL OF A DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF UNSATURATED DICARBOXYLIC ACIDS HAVING 28-44 CARBON ATOMS RESULTING FROM DIMERIZATION OF UNSATURATED FATTY ACIDS OF 14-22 CARBON ATOMS, AND THE CORRESPONDING SATURATED DICARBOXYLIC ACIDS, AND WHEN M IS 3, R1 IS A TRIVALENT HYDROCARBON RADICAL OF A TRICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF UNSATURATED TRICARBOXYLIC ACIDS HAVING 42-66 CARBON ATOMS RESULTING FROM TRIMERIZATION OF UNSATURATED FATTY ACIDS OF 14-22 CARBON ATOMS, AND THE CORDESPONDING SATURATRD TRICARBOXYLIC ACIDS; R2 IS SELECTED FROM THE ALKYLENE RADICALS HAVING 2-5 CARBON ATOMS, N IS AN INTEGER FROM 2 TO 50 AND EACH OF R3 AND R''3 IS THE MONOVALENT HYDROCARBON RADICAL OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONOALCOHOLS OF 1-25 CARBON ATOMS, ALICYCLIC MONOALCOHOLS OF 3-25 CARBON ATOMS AND UNSUBSTITUTED AND ALKYL-SUBSTITUTED MONOPHENOLS OF 6-25 CARBON ATOMS, THE PROPORTION OF SAID COMPOUND (B) WITH RESPECT TO SAID HYDROCARBON OIL (A) BEING SUFFICIENT TO IMPART TO SAID COMPOSITION THE DESIRED HIGH VISCOSITY INDEX, AND COMPONENTS (A) AND (B) TOGETHER CONSTITUTING THE PREDOMINANT COMPONENT OF SAID COMPOSITION. |