Patent SG-11201901704W-A (SG)
Title: Low conductivity lubricating oils for electric and hybrid vehicles
Inventor: GAO ZHISHENG
IPC: C10M167/00
Filed: 2017-10-06
Abstract: 1 cc O N O cc O O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 12 April 2018 (12.04.2018) WIP0 1 PCT °Ens OH oI0III11010101111010IIl o En oimIE (10) International Publication Number WO 2018/067908 Al (51) International Patent Classification: ClOM 167/00 (2006.01) (21) International Application Number: PCT/US2017/055499 (22) International Filing Date: 06 October 2017 (06.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/405,283 07 October 2016 (07.10.2016) US 15/725,670 05 October 2017 (05.10.2017) US (71) Applicant: EXXONMOBIL RESEARCH AND EN- GINEERING COMPANY [US/US]; 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (72) Inventors: GAO, Zhisheng; 2 Buttonwood Way, Rose Valley, PA 19063 (US). SALVI, Luca; 135 Ardmore Av- enue, Haddonfield, NJ 08033 (US). FLORES-TORRES, Samuel; 37 Steeplechase Boulevard, Burlington, NJ 08016 (US). (74) Agent: MIGLIORINI, Robert A.. et al.; Exxonmobil Re- search and Engineering Company, 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (54) Title: LOW CONDUCTIVITY LUBRICATING OILS FOR ELECTRIC AND HYBRID VEHICLES FIG. 1 - Lubricant Oils for Electric Vehicles; Conductivity 50-1000 pS/m Comparative 1 Example Example 1 2 Example Example 3 4 COMPOSITION (wt%) Sec-ZDDP 0.64 1.36 0.64 1.36 Mo Dithiocarbamate 0.15 0.15 Uncapped PTB succinimide 3.25 3.25 3.25 3.25 Boron-modified PIB succinimide Ca Salicy tales (mixed TBN) Viscosity Modifier 0.9 0.9 0.9 0.9 0.9 Lubricating Oil Additives 2.1 2.1 2.1 2.1 2.1 Base Oil (Group III, IV. V mixtures) 97 93.11 92.39 92.96 92.24 PROPERTIES Kinematic Viscosity, 1000, cSt 8.28 8.69 8.69 8.70 8.83 Conductivity, pS/m, Ambient temp 8 756 832 928 983 RATIO: INHIBITORS/PROMOTERS 0.2 0.42 0.24 0.46 (57) : Provided is a lubricating oil for electric and hybrid vehicles. The lubricating oil includes at least 80 wt % of a lubricat- ing base oil, 0.5 to 5 wt % of one or more dispersants, 0 to 4 wt % of one or more neutral metal detergents, 0 to 1.5 wt % of zinc dialkyldithiophosphate, 0 to 0.2 wt % of molybdenum dialkyldithiocarbamate, 0 to 2 wt % of an active viscosity modifier, and 0.01 to 5 wt % of one or more other lubricating oil additives. The lubricating oil is essentially free of overbased metal detergents. The lubricating oil has an electrical conductivity from 50 to 3,000 pS/m and a kinematic viscosity from 2 to 20 cSt at 100°C. This disclosure also relates to methods for producing the lubricating oil, methods for lubricating electric and hybrid vehicles, and methods for controlling electrical conductivity of a lubricating oil by using conductivity promoters and conductivity inhibitors. [Continued on next page] WO 2018/067908 Al MIDEDIMOMMIDIIMMOINIMMECINIMIDEVOIMIE TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3))