EP 2049631 A4 20110914 - A LOW PHOSPHORUS LUBRICATING OIL COMPOSITION HAVING LEAD CORROSION CONTROL
Title (en)
A LOW PHOSPHORUS LUBRICATING OIL COMPOSITION HAVING LEAD CORROSION CONTROL
Title (de)
SCHMIERÖLZUSAMMENSETZUNG MIT GERINGEM PHOSPHORANTEIL UND BLEIKORROSIONSKONTROLLE
Title (fr)
COMPOSITION D'HUILE LUBRIFIANTE DE FAIBLE TENEUR EN PHOSPHORE LIMITANT LA CORROSION DU PLOMB
Publication
Application
Priority
- US 2007075507 W 20070808
- US 46353206 A 20060809
Abstract (en)
[origin: US2008039348A1] The present invention provides a low phosphorus lubricating oil composition containing a mixture of zinc dithiophosphates in a certain ratio surprisingly yields improved lead corrosion. The synergistic combination of mixed zinc dithiophosphates containing a zinc primary dialkyl dithiophosphate, zinc secondary dialkyl dithiophosphate and zinc diaryl dithiophosphate in a respective ratio, based on the phosphorus content, of the zinc primary dialkyl dithiphosphate to zinc secondary dialkyl dithiophosphate from about 2:1 to about 1:2 and the ratio of the mixture of zinc primary dialkyl dithiophosphate and zinc secondary dialkyl dithiophosphate to zinc diaryl dithiophosphate from about 6:1 to about 1:1. When used in a lubricating oil composition having a total phosphorus content less than about 0.06 wt %, based on the total weight of the lubricating oil composition to lubricate internal combustion engines. The mixture of zinc dithiophosphates greatly reduces lead corrosion.
IPC 8 full level
C10M 137/10 (2006.01); C10N 10/04 (2006.01); C10N 10/14 (2006.01); C10N 30/12 (2006.01); C10N 40/25 (2006.01)
CPC (source: EP US)
C10M 137/10 (2013.01 - EP US); C10M 169/04 (2013.01 - US); C10M 2207/026 (2013.01 - EP US); C10M 2207/028 (2013.01 - EP US); C10M 2215/064 (2013.01 - EP US); C10M 2215/28 (2013.01 - EP US); C10M 2219/044 (2013.01 - EP US); C10M 2223/045 (2013.01 - EP US); C10N 2010/04 (2013.01 - EP US); C10N 2020/04 (2013.01 - EP US); C10N 2030/12 (2013.01 - EP US); C10N 2030/42 (2020.05 - EP US); C10N 2030/43 (2020.05 - EP US); C10N 2030/45 (2020.05 - EP US); C10N 2040/25 (2013.01 - EP US)
Citation (search report)
- [I] EP 1403359 A1 20040331 - INFINEUM INT LTD [GB]
- [A] EP 0435745 A1 19910703 - NISSAN MOTOR [JP], et al
- See references of WO 2008021901A2
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
US 2008039348 A1 20080214; CA 2659854 A1 20080221; CA 2659854 C 20160510; EP 2049631 A2 20090422; EP 2049631 A4 20110914; EP 2049631 B1 20130313; JP 2010500457 A 20100107; JP 5345935 B2 20131120; US 2013137616 A1 20130530; WO 2008021901 A2 20080221; WO 2008021901 A3 20080417
DOCDB simple family (application)
US 46353206 A 20060809; CA 2659854 A 20070808; EP 07840789 A 20070808; JP 2009523982 A 20070808; US 2007075507 W 20070808; US 201313746724 A 20130122