Abstract:
Grease compositions comprising (1) as a base fluid a polyol aliphatic ester and (2) as a thickener finely divided sodium montmorillonite clay. The clay may be used as the sole thickener or it may be used in combination with a finely divided fluorinated ethylenepropylene copolymer. Also, molybdenum disulfide or antimony dialkyldithiocarbamate may be added to the compositions. The compositions have both good wear characteristics and good extreme pressure characteristics at temperatures in the -65* F. to 350* F. range. The grease compositions are useful in heavily loaded airframe bearings, screw jack actuators, journal bearings, and in other applications where there is sliding, rolling, oscillating, or other forms of motion where wear and extreme pressure are factors.
Abstract:
GREASE FORMULATIONS OF BY WEIGHT 65 TO 93% PERFLUOROOLEFIN EPOXIDE POLYETHER LIQUIDS WITH THICKENERS 19 TO 24% TRIAZINE, 7 TO 10% SPHERICAL BORON NITRUDE OF 0.05 TO 0.5 MICRON DIAMETER, AND 20 TO 35% FLUORINATED ETHYLENE PROPYLENE COPOLYMER POWDER, STABLE AT TEMPERATURES UP 600*F.
Abstract:
THIS INVENTION COMPRISES AN IMPROVED GREASE HAVING IMPROVED WEAR, IMPROVED EXTREME PRESSURE CHARACTERISTICS AND IMPROVED TEMPERATURE RANGE UTILITY COMPRISING A POLYFLUOROALKYL-ALKYL POLYSILOXANE AS A BASE, FLUORINATED COPOLYMER OF ETHYLENE AND PROPYLENE AS A THICKENER AND ANTIMONY DIALKYL DITHIOCARBAMATE. THE IMPROVED GREASE OF THIS INVENTION HAS PARTICULAR UTILITY IN AIRCRAFT AND OTHER EQUIPMENT WHERE HEAVY LOADS ARE PREVALENT AND LITTLE OR NO WEAR CAN BE TOLERATED.
Abstract:
A GREASE FORMULATION CAPABLE OF MAINTAINING ITS DIMENSIONAL STABILITY UNDER HEAVY LOAD AND HIGH TEMPERATURE CONDITIONS CONSISTING OF (1) A MAJOR PROPORTION OF TRIFLUOROPROPYLMETHYLSILOXANE HAVING A VISOCITY OF 300 CENTISTOKES AND CONSISTING ESSENTIALLY OF
CF2CH3CH2SI(CH3)O
UNITS AND ENDBLOCKING UNITS OF THE FORMULA (CH3)2SIO5; (2) A MINOR PROPORTION BY WEIGHT OF A COMPOSITION CONSISTING OF (A) 50-55% BY WEIGHT OF BITOLYLENE DIISOCYANATE, (B) 20-30% BY WEIGHT OF P-CHLORANILINE, AND (C) 20-25% BY WEIGHT OF P-TOLUIDINE; AND (3) 10% BY WEIGHT OF MOLYBDENUM DISULFIDE.