Grease compositions containing salts of carboxylic copolymers

Claim 1

A LUBRICATING GREASE COMPOSITION COMPRISING A MAJOR PROPORTION OF A MINERAL LUBRICATING OIL, IN THE RANGE OF 2 TO 35 WT. PERCENT OF AN ALKALI METAL SALT OF AN ACIDIC POLYMERIC MATERIAL, AND IN THE RANGE OF 2 TO 6 WT. PERCENT OF AN ALKALI METAL SALT OF A LOW MOLECULAR WEIGHT ACID HAVING IN THE RANGE OF 1 TO 5 CARBON ATOMS PER MOLECULE AND ABOUT 2 TO 30 WT. PERCENT OF AN ALKALI METAL SOAP OF A C12 TO C22 CARBOXYLIC ACID, SAID SOAP AND SAID ALKALI METAL SALTS BEING HEATED TO A TEMPERATURE IN THE RANGE OF 400* TO 600*F. FOR A TIME IN THE RANGE OF 0.5 TO 5 HOURS AND SAID ACIDIC POLYMERIC MATERIAL CONSISTING OF A COPOLYMER OF ONE MOLE OF A MONOCARBOXYLIC ALPHABETA UNSATURATED ACID HAVING IN THE RANGE 3 TO 6 CARBON ATOMS PER MOLECULE, WITHIN THE RANGE OF 10 TO 20 MOLES OF A CONJUGATED DIOLEFIN CONTAINING IN THE RANGE OF 4 TO 10 CARBON ATOMS PER MOLECULE, SAID COPOLYMER BEIN FORMED BY HEATING THE ACID AND DIOLEFIN TO A TEMPERATURE IN THE RANGE OF 60* TO 140*C. FOR A TIME IN THE RANGE OF 1 TO 24 HOURS IN THE PRESENCE OF A POLYMERIZATION CATALYST.