EP 2118246 B1 20181024 - Method and use of engine lubricants in four-stroke engines

Title (en)

Method and use of engine lubricants in four-stroke engines

Title (de)

Methode und Verwendung eines MOTORSCHMIERMITTEL für Viertaktmotoren

Title (fr)

Méthode et usage d'un LUBRIFIANT POUR MOTEURS à quatre temps

Publication

EP 2118246 B1 20181024 (EN)

Application

EP 08709482 A 20080221

Priority

GB 2008000599 W 20080221
GB 0703831 A 20070228
US 90384407 P 20070228

Abstract (en)

[origin: WO2008104745A2] An engine lubricant, especially an SAE OW engine lubricant is described. The engine lubricant has at least 15 wt% of at least one diester and not more than 15 wt% of additives, wherein said at least one diester, or mixture of said diesters if more than one is present, has a kinematic viscosity at 100°C of not more than 3.3, a viscosity index of at least 130, a pour point of not more than -30°C and a Noack evaporation loss of not more than 15 wt%. The diester is preferably selected from the group consisting of: a) reaction products of at least one C5 to C12, preferably C6 to C10, aliphatic dicarboxylic acid or anhydride thereof with at least one primary or secondary C7 to C12, preferably C8 to C10 aliphatic alcohol, wherein, if said at least one acid is branched, then at least one of said at least one alcohol is linear and, if said at least one acid is linear, then at least one of said at least one alcohol is branched; and b) reaction products of at least one C5 to C12, preferably C6 to C10, aliphatic monocarboxylic acid with at least one polyalkylene glycol wherein the alkyl group is selected from a C2 to C4 alkyl group and mixtures thereof, and wherein, if said at least one poly(alkylene glycol) contains at least one repeat unit that is branched methyl group, then at least one of said at least one acid is linear and, if said at least one poly(alkylene glycol) contains only linear repeat units, then at least one of said at least one acid is branched.

IPC 8 full level

C10M 171/02 (2006.01); C10M 105/36 (2006.01); C10M 105/38 (2006.01); C10M 169/04 (2006.01)

CPC (source: EP US)

C10M 105/36 (2013.01 - EP US); C10M 105/38 (2013.01 - EP US); C10M 169/04 (2013.01 - EP US); C10M 171/02 (2013.01 - EP US); C10M 2203/1025 (2013.01 - EP US); C10M 2205/0285 (2013.01 - EP US); C10M 2207/026 (2013.01 - EP US); C10M 2207/2815 (2013.01 - EP US); C10M 2207/2825 (2013.01 - EP US); C10M 2207/2835 (2013.01 - EP US); C10M 2207/289 (2013.01 - EP US); C10M 2209/084 (2013.01 - EP US); C10M 2209/1095 (2013.01 - EP US); C10M 2215/064 (2013.01 - EP US); C10M 2215/223 (2013.01 - EP US); C10M 2219/106 (2013.01 - EP US); C10M 2223/045 (2013.01 - EP US); C10M 2229/02 (2013.01 - EP US); C10N 2020/02 (2013.01 - EP US); C10N 2020/069 (2020.05 - EP US); C10N 2020/071 (2020.05 - EP US); C10N 2030/02 (2013.01 - EP US); C10N 2030/08 (2013.01 - EP US); C10N 2030/74 (2020.05 - EP US); C10N 2040/25 (2013.01 - EP US)

Citation (examination)

GB 1013222 A 19651215 - GEIGY AG J R
EP 0453114 A1 19911023 - TONEN CORP [JP], et al
DE 102004034202 A1 20051110 - SASOL GERMANY GMBH [DE]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2008104745 A2 20080904; WO 2008104745 A3 20090226; EP 2118246 A2 20091118; EP 2118246 B1 20181024; ES 2705593 T3 20190326; GB 0703831 D0 20070411; JP 2010520319 A 20100610; US 2010093579 A1 20100415

DOCDB simple family (application)

GB 2008000599 W 20080221; EP 08709482 A 20080221; ES 08709482 T 20080221; GB 0703831 A 20070228; JP 2009551257 A 20080221; US 44980008 A 20080221