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:
Oct. 02, 2018
Filed:
May. 03, 2016
Vanderbilt Chemicals, Llc, Norwalk, CT (US);
Carl K. Esche, Richmond, VA (US);
Glenn A. Mazzamaro, Middlebury, CT (US);
VANDERBILT CHEMICALS, LLC, Norwalk, CT (US);
Abstract
A lubricant composition is provided which mitigates the negative effect of zinc in ZDDP with respect to wear on timing chains by using in contact with the timing chain a lubricant composition comprising an ashless zinc-free organophosphorus compound and optionally zinc dialkyldithiophosphate, together providing about 50 to about 1000 ppm phosphorus, preferably about 300-800 ppm phosphorus, and more preferably about 500-750 ppm phosphorus; less than about 350 ppm to lower than <1 ppm zinc from ZDDP; and at least about 100 ppm molybdenum from an organomolybdenum compound (preferably molybdate ester); wherein the Mo:Zn ratio is at least about 0.2:1 and the Zn:P ratio is lower than or equal to about 1.1:1; or in the alternative an organomolybdenum compound providing between about 300-700 ppm molybdenum, in combination with ZDDP providing zinc between about 200-800 ppm zinc, wherein the ratio of Mo:Zn ratio is at least about 0.4:1 to about 3:1.