Polymer thickened lubricants for high operating temperatures

Details Polymer thickened lubricants for high operating temperatures Polymer thickened lubricants for high operating temperatures

1997-03-05

1998-12-08

Howard, Jacqueline V.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Solid hydrocarbon polymer

585 12, C10M11902

Patent

active

058469184

ABSTRACT:
A polymer thickened lubricating grease composition with improved resistance to high operating temperatures (constant and/or peak), containing 1) a lubricating base oil, 2) a polymeric thickener, containing a) a high melting point component comprising at least one polymer with a melting point (ASTM D-2117) of more than 200.degree. C., especially more than 225.degree. C., and b) a low molecular weight component comprising a (co- or homo-) polymer of propylene with a weight average molecular weight <100,000, and 3) optional further lubricating grease additives. The polymer thickener of the grease preferably further contains c) 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.degree. C., more preferably 180.degree.-220.degree. C., and is suitable for use in high operating temperature applications.

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