EP 0578435 A1 19940112 - Friction modification of synthetic gear oils.
Title (en)
Friction modification of synthetic gear oils.
Title (de)
Modifizierung der Reibung synthetischer Getriebeöle.
Title (fr)
Modification de la friction d'huiles synthétiques pour engrenages.
Publication
Application
Priority
US 91120392 A 19920709
Abstract (en)
Gear oils and gear oil additive packages that exhibit improved frictional properties for use in transmissions equipped with synchronizers are described. The lubricant compositions have a kinematic viscosity at 100 DEG C in the range of 4 to 32 mm<2>.s<-><1> (cSt), and comprise a) a base oil having at least 25%, preferably at least 50%, more preferably least 75%, and most preferably 100% by weight of (i) hydrogenated poly-alpha-olefin oligomer oil or (ii) synthetic ester oil, or (iii) a combination of (i) and (ii); b) an amount of a gear oil additive package such that the gear oil lubricant satisfies or exceeds the specifications for API-GL4 service; and c) an amount in the range of 0.01 to 2 wt % based on the total weight of the lubricant of at least one alkali or alkaline earth metal salt of an oil-soluble sulfonic acid, the amount of said metal salt used being sufficient to improve the friction properties of the lubricant for use in manual transmissions, particularly those of the synchronizer type; said lubricant containing at most 100 ppm of metal as one or more additive components other than said metal salt, and having on a weight basis a boron content, if any, of not more than 1,000 ppm.
IPC 1-7
IPC 8 full level
C10M 169/04 (2006.01); C10N 10/02 (2006.01); C10N 10/04 (2006.01); C10N 20/02 (2006.01); C10N 30/00 (2006.01); C10N 30/04 (2006.01); C10N 30/06 (2006.01); C10N 30/12 (2006.01); C10N 40/04 (2006.01)
CPC (source: EP)
C10M 105/36 (2013.01); C10M 105/38 (2013.01); C10M 105/44 (2013.01); C10M 107/10 (2013.01); C10M 129/10 (2013.01); C10M 129/40 (2013.01); C10M 129/42 (2013.01); C10M 133/06 (2013.01); C10M 133/44 (2013.01); C10M 133/56 (2013.01); C10M 135/02 (2013.01); C10M 135/10 (2013.01); C10M 135/22 (2013.01); C10M 135/36 (2013.01); C10M 137/02 (2013.01); C10M 137/04 (2013.01); C10M 137/08 (2013.01); C10M 137/10 (2013.01); C10M 143/04 (2013.01); C10M 145/14 (2013.01); C10M 145/34 (2013.01); C10M 145/38 (2013.01); C10M 159/123 (2013.01); C10M 159/16 (2013.01); C10M 159/24 (2013.01); C10M 169/044 (2013.01); C10M 169/048 (2013.01); C10M 2205/00 (2013.01); C10M 2205/024 (2013.01); C10M 2205/028 (2013.01); C10M 2205/0285 (2013.01); C10M 2207/023 (2013.01); C10M 2207/026 (2013.01); C10M 2207/027 (2013.01); C10M 2207/123 (2013.01); C10M 2207/125 (2013.01); C10M 2207/126 (2013.01); C10M 2207/127 (2013.01); C10M 2207/129 (2013.01); C10M 2207/22 (2013.01); C10M 2207/281 (2013.01); C10M 2207/282 (2013.01); C10M 2207/2825 (2013.01); C10M 2207/283 (2013.01); C10M 2207/2835 (2013.01); C10M 2207/2855 (2013.01); C10M 2207/286 (2013.01); C10M 2207/302 (2013.01); C10M 2207/3025 (2013.01); C10M 2207/34 (2013.01); C10M 2209/084 (2013.01); C10M 2209/104 (2013.01); C10M 2209/107 (2013.01); C10M 2209/109 (2013.01); C10M 2215/04 (2013.01); C10M 2215/08 (2013.01); C10M 2215/082 (2013.01); C10M 2215/086 (2013.01); C10M 2215/22 (2013.01); C10M 2215/221 (2013.01); C10M 2215/223 (2013.01); C10M 2215/225 (2013.01); C10M 2215/226 (2013.01); C10M 2215/26 (2013.01); C10M 2215/28 (2013.01); C10M 2215/30 (2013.01); C10M 2217/043 (2013.01); C10M 2217/046 (2013.01); C10M 2217/06 (2013.01); C10M 2219/02 (2013.01); C10M 2219/022 (2013.01); C10M 2219/044 (2013.01); C10M 2219/046 (2013.01); C10M 2219/082 (2013.01); C10M 2219/083 (2013.01); C10M 2219/10 (2013.01); C10M 2219/102 (2013.01); C10M 2219/104 (2013.01); C10M 2219/106 (2013.01); C10M 2219/108 (2013.01); C10M 2223/02 (2013.01); C10M 2223/04 (2013.01); C10M 2223/041 (2013.01); C10M 2223/042 (2013.01); C10M 2223/043 (2013.01); C10M 2223/045 (2013.01); C10M 2223/047 (2013.01); C10M 2223/049 (2013.01); C10M 2223/10 (2013.01); C10M 2223/12 (2013.01); C10M 2223/121 (2013.01); C10M 2227/061 (2013.01); C10N 2020/01 (2020.05); C10N 2040/02 (2013.01); C10N 2070/02 (2020.05)
Citation (search report)
- [X] WO 8805810 A1 19880811 - LUBRIZOL CORP [US]
- [Y] EP 0399764 B1 19920325
- [Y] EP 0407124 A1 19910109 - TONEN CORP [JP]
- [X] EP 0237804 A2 19870923 - NIPPON OIL CO LTD [JP]
- [A] EP 0480644 A1 19920415 - ETHYL PETROLEUM ADDITIVES INC [US]
- [A] FR 2442265 A1 19800620 - EXXON RESEARCH ENGINEERING CO [US]
- [AP] EP 0531585 A1 19930317 - ETHYL PETROLEUM ADDITIVES LTD [GB]
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 0578435 A1 19940112; EP 0578435 B1 19971015; CA 2099314 A1 19940110; DE 69314554 D1 19971120; DE 69314554 T2 19980219; JP H06179887 A 19940628
DOCDB simple family (application)
EP 93305125 A 19930630; CA 2099314 A 19930628; DE 69314554 T 19930630; JP 19186093 A 19930707