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(12) United States Patent (10) Patent No.: US 8,168,572 B2 Thoen Et Al

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(12) United States Patent (10) Patent No.: US 8,168,572 B2 Thoen Et Al US008 168572B2 (12) United States Patent (10) Patent No.: US 8,168,572 B2 Thoen et al. (45) Date of Patent: May 1, 2012 (54) LUBRICANT BLEND COMPOSITION 5,413,725 A 5/1995 Lal et al. 5,451,334 A 9/1995 Bongardt et al. (75) Inventors: Johan A. Thoen, Antwerp (BE); Rene 3. A 2:3: tal al Geiger, Ruechlikon (CH): Martin R. 5,552,068 A 9, 1996 Griffith Greaves, Hirzel (CH); David C. Busby, 5,773,391 A 6/1998 Lawate et al. Midland, MI (US) 5,902,777 A 5/1999 Hashimoto et al. 5,949,017 A 9, 1999 Oommen et al. (73) Assignee: Dow Global Technologies LLC, 5,972,854. A 10/1999 Ichihashi et al. Midland, MI (US) 6, 160,144. A 12, 2000 Bongardt et al. s 6,278,006 B1 8, 2001 Kodali et al. - 6,300,292 B2 10/2001 Konishi et al. (*) Notice: Subject to any disclaimer, the term of this 6,383,992 B1* 5/2002 Garmier et al. ............... 508/491 patent is extended or adjusted under 35 6,511.947 B1 1/2003 Nakanishi et al. U.S.C. 154(b) by 257 days. 6,534.454 B1 3/2003 Garmier et al. 2003/0171227 A1 9, 2003 Holt et al. 2004/0241309 A1 12/2004 Garmier (21) Appl. No.: 12/593,472 2005/0059562 A1 3/2005 Garmier ........................ 508.437 2006, O193802 A1 8/2006 Lysenko et al. (22) PCT Filed: Apr. 1, 2008 2007, OO 10607 A1 1/2007 Smith et al. 2007. O142243 A1 6/2007 Cherpecket al. (86). PCT No.: PCT/US2008/058970 FOREIGN PATENT DOCUMENTS S371 (c)(1), EP O678569 A2 10, 1995 (2), (4) Date: Sep. 28, 2009 EP 1063279 A1 12/2000 WO WO-9712949 A1 4f1997 (87) PCT Pub. No.: WO2008/134179 WO WO-O 102521 1, 2001 WO WO-O 148127 T 2001 PCT Pub. Date: Nov. 6, 2008 WO WO-O2O77135 A1 10/2002 WO WO-2005O26300 A1 3, 2005 (65) Prior Publication Data WO WO-2006120216 A1 11 2006 US 2010/O12O639 A1 May 13, 2010 OTHER PUBLICATIONS Related U.S. Application Data Hamblin; Oxidative Stabilisation of Synthetic Fluids and Vegetable .S. App Oils: XP-0025 19343, Jul. 1999. (60) Provisional application No. 60/926,201, filed on Apr. Erhan et al.; Oxidation and low temperature stability of vegetable 25, 2007. oil-based lubricants; ScienceDirect; Industrial Crops and Products 24; pp. 292-299 (2006). (51) Int. Cl. k . CIOM IOI/04 (2006.01) cited by examiner CIOM I59/08 (2006.01) CIOM 69/04 (2006.01) Primary Examiner – Walter D Griffin (52) U.S. Cl. ......................... 508/491; 508/456; 508/.486 Assistant Examiner — Francis C Campanell (58) Field of Classification Search .................. 508/456, 508/.486, 491 (57) ABSTRACT See application file for complete search history. The present invention relates to a lubricant composition. The (56) References Cited present invention more particularly relates to a fully miscible lubricant composition that comprise a polyether and a renew U.S. PATENT DOCUMENTS able raw material Such as an unsaturated seed or vegetable oil. 5,171,861. A * 12/1992 Ernhoffer et al. ............. 508,231 5,335,471 A 8/1994 Kupiec 14 Claims, No Drawings US 8,168,572 B2 1. 2 LUBRICANT BLEND COMPOSITION 87 pour point in excess of -10°C. (e.g. -5°C.) or to have a viscosity at either 40°C. or 100° C. or a VI outside the ranges The present invention relates generally to a lubricant com noted in the first aspect. position. The present invention relates particularly to fully In a second related aspect, which applies to either the miscible lubricant compositions that comprise a polyether aspect or the first related aspect, the lubricant blend compo and a renewable raw material source Such as an unsaturated sition further comprises a wear-reducing amount of amine seed or vegetable oil, whether genetically modified or not. phosphate. The present invention relates more particularly to Such com In a third related aspect, which applies to any of the aspect, positions in conjunction with one or more of a wear-reducing the first related aspect or the second related aspect, the lubri 10 cant blend composition further comprises an antioxidant additive, especially an amine phosphate, an antioxidant, espe selected from a group consisting of phenolic antioxidants and cially a phenolic antioxidant, an amine antioxidant or a com amine antioxidants. bination of a phenolic antioxidant and an amine antioxidant, In a fourth related aspect, which applies to the aspector any and a corrosion inhibitor Such as a sodium salt of dinonyl of its first through third related aspects, the lubricant blend naphthalene Sulfonic acid or a calcium salt of dinonylnaph 15 composition further comprises a corrosion-inhibiting amount thalene Sulfonic acid. of a sodium salt of dinonylnaphthalene Sulfonic acid. “Bio-lubricants', or lubricants based upon renewable In a fifth related aspect, the lubricant blend composition of resources such as seed oils and vegetable oils rather than from the aspect or any of its first through fourth related aspects, petroleum or natural gas, represent a small, but growing seg further comprises a demulsfier. ment of total global lubricants demand. Bio-lubricants find The lubricant blend compositions of either the aspect or particular favor in environmentally sensitive applications any of the related aspects have a variety of end use applica Such as marine, forestry or agricultural lubricants due to tions, one of which is as a power transmission fluid. See e.g. observations that they readily biodegrade, have low toxicity Verband Deutscher Maschinen and Anlagen bau e. V. and do not appear to harmaquatic organisms and Surrounding (VDMA) 24568 (minimum technical requirements for bio Vegetation. In at least partial recognition of Such observa 25 degradable hydraulic fluids, specified according to ISO tions, Germany and Austria ban use of mineral oils in total 15380: 2002. loss lubrication applications such as chain saw lubrication References to the Periodic Table of the Elements herein and Portugal and Belgium mandate use of biodegradable shall refer to the Periodic Table of the Elements, published lubricants in outboard engines. Technical performance short and copyrighted by CRC Press, Inc., 2003. Also, any refer comings of unmodified seed oils, relative to synthetic lubri 30 ences to a Group or Groups shall be to the Group or Groups cants derived from petroleum or natural gas Such as polyo reflected in this Periodic Table of the Elements using the lesters, polyalkylene glycols and poly(alpha-olefins), in IUPAC system for numbering groups. terms of hydrolytic stability, oxidative stability and low tem Unless stated to the contrary, implicit from the context, or perature properties including pour point limit growth of neat customary in the art, all parts and percents are based on (no additives), unmodified seed oils as bio-lubricants. For 35 weight. For purposes of United States patent practice, the example, in cold climates (temperatures below -10° centi contents of any patent, patent application, or publication ref grade (C.)), vegetable oils tend to solidify more readily than erenced herein are hereby incorporated by reference in their petroleum-based products and, accordingly, have relatively entirety (or the equivalent US version thereof is so incorpo high (greater than -10°C.) pour point temperatures. Addition rated by reference) especially with respect to the disclosure of of a pour point depressant to vegetable oils yields a compo 40 synthetic techniques, definitions (to the extent not inconsis sition with lower pour point temperature than that of neat tent with any definitions provided herein) and general knowl vegetable oil. edge in the art. U.S. Pat. No. 5,335,471 discloses use of methacrylate and The term “comprising and derivatives thereof does not styrene? maleic anhydride interpolymers as pour point depres exclude the presence of any additional component, step or sant additives for seed oil lubricants. 45 procedure, whether or not the same is disclosed herein. In U.S. Pat. No. 5,413,725 teaches use of the same interpoly order to avoid any doubt, all compositions claimed herein mers as pour point depressant additives for seed oil lubricants through use of the term "comprising may include any addi derived from high oleic containing feedstocks. tional additive, adjuvant, or compound whether polymeric or As used throughout this specification, definitions pre otherwise, unless stated to the contrary. In contrast, the term, sented in this paragraph, in Succeeding paragraphs or else 50 “consisting essentially of excludes from the scope of any where in the specification, have meanings ascribed to them Succeeding recitation any other component, step or proce where first defined. dure, excepting those that are not essential to operability. The When ranges are stated herein, as in a range of from 2 to 10, term “consisting of excludes any component, step or proce both end points of the range (e.g. 2 and 10) are included dure not specifically delineated or listed. The term “or. within the range unless otherwise specifically excluded. 55 unless stated otherwise, refers to the listed members individu An aspect of the present invention is a lubricant blend ally as well as in any combination. composition comprising at least one first component, the first “Oleic acid means cis-9,10-octadecenoic acid. component being a vegetable oil or seed oil, and at least one Expressions of temperature may be in terms either of second component, the second component being a polyether, degrees Fahrenheit (F) together with its equivalent in C. or, the blend having an ASTM D97-87 pour point of -10° C. or 60 more typically, simply in C. lower, a viscosity at 40°C. within a range of from 10 square Lubricant blends of the present invention (the aspect and millimeters per second (mm/s) to 100 mm/s, a viscosity at any of its related aspects as detailed above) comprise at least 100° C.
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