The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 1998
Filed:
Mar. 05, 1997
Dick Meijer, Nieuwegein, NL;
Herman Lankamp, Bunnik, NL;
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.