Polymer thickened lubricanta for high operating temperatures

摘要

The present invention relates to a polymer thickened lubricating grease composition with improved resistance to high operating temperatures (constant and/or peak), comprising 1) a lubricating base oil 2) a polymeric thickener, comprising 2a) a high melting point component comprising at least one polymer with a melting point (ASTM D-2117) of more than 200 DEG C, especially more than 225 DEG C, and 2b) a low molecular weight component comprising a (co- or homo-) polymer of propylene with a weight average molecular weight <100.000, and 3) optionally further additives known per se. The grease preferably further comprises 2c) a high molecular weight component comprising a (co- or homo-) polymer of propylene with a weight average molecular weight >200.000. The grease preferably has a dropping point of >150 DEG C, more preferably 180-220 DEG C, and is suitable for use in high operating temperature applications.