Stable greases containing synthetic gelling agents

Claim 1

A GREASE COMPRISING AN OLEAGINOUS VEHICLE AND A SALT IN AN AMOUNT SUFFICIENT TO THICKEN SAID VEHICLE TO FORM A GREASE, SAID SALT BEING A METAL SALT OF AN ACIDIC REACTION PRODUCT OBTAINED BY REACTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC MONOHYDRIC ALCOHOL HAVING AT LEAST ABOUT EIGHT CARBON ATOMS PER MOLECULE AND AN ALIPHATIC MONOAMINE HAVING AT LEAST ABOUT EIGHT CARBON ATOMS PER MOLECULE, WITH AN ACIDIC COPOLYMER OF AN ALPHA, BETA UNSATURATED POLYCARBOXYLIC ACID AND A LOW MOLECULAR WEIGHT ORGANIC COMPOUND HAVING A TERMINAL VINYL GROUP AND HAVING LESS THAN ABOUT TEN CARBON ATOMS PER MOLECULE, SUCH THAT FROM ABOUT FIFTY TO ABOUT NINETY PER CENT OF THE CARBOXYL GROUPS OF THE ACIDIC COPOLYMER ARE REACTED WITH SAID COMPOUND, SAID ACIDIC COPOLYMER HAVING A MOLECULAR WEIGHT ABOVE ABOUT 1000, THE METAL OF SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS I THROUGH III AND MENDELEEFF''S PERIODIC SYSTEM AND A SMALL AMOUNT, SUFFICIENT TO REDUCE THE TENDENCY TO STIFFEN ON STANDING OF A GREASE COMPRISED OF SAID OLEAGINOUS VEHICLE AND SAID SALT, OF A POLYMERIC MATERIAL HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 10,000 TO ABOUT 100,000, POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF AN OLEFIN POLYMER; AN ESTER POLYMER; AND ESTERIFIED COPOLYMER OF AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID ANHYDRIDE AND VINYL ACETATE; AND ESTERFIED COPOLYMER OF A VINYL ETHER AND AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID ANHYDRIDE; AN ESTERIFIED COPOLYMER OF AN ALKYL ETHER AND AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ANHYDRIDE; AND AND ESTER OF THIOPHENE-MODIFIED, MALEIC ANHYDRIDESTYRENE COPOLYMER.