Abstract: An improved lubricating grease composition comprising a 12 hydroxy lithium calcium stearate with improved compatibility with elastomeric materials, improved oxidation resistance and improved dropping point flew characteristics. The improved grease composition is prepared by a process in which a bright stock paraffin oil is mixed with 12-hydroxy stearic acid, and the mixture is then heated to a temperature of from about 170 to about 200 degrees Fahrenheit for at least 30 minutes. Thereafter, lithium hydroxide and calcium hydroxide are added to the mixture, and the mixture is then neutralized by heating it to a temperature of from about 360 to about 450 degrees Fahrenheit. The saponified mixture is then comminuted so that at least about 90 weight percent of the particles in it are smaller than 1 micron. To this comminuted mixture is then added another portion of the specified paraffinic bright stock oil.

Abstract: A process for preparing a lubricating grease in which a bright stock paraffin oil is mixed with 12-hydroxy stearic acid, and the mixture is then heated to a temperature of from about 170 to about 200 degrees Fahrenheit for at least 30 minutes. Thereafter, lithium hydroxide and calcium hydroxide are added to the mixture, and the mixture is then neutralized by heating it to a temperature of from about 360 to about 450 degrees Fahrenheit. The saponified mixture is then comminuted so that at least about 90 weight percent of the particles in it are smaller than 1 micron. To this comminuted mixture is then added another portion of the specified paraffinic bright stock oil.