EP 3887492 A1 20211006 - ANTIOXIDANT MIXTURE FOR HIGH VISCOUS POLYALKYLENE GLYCOL BASESTOCK
Title (en)
ANTIOXIDANT MIXTURE FOR HIGH VISCOUS POLYALKYLENE GLYCOL BASESTOCK
Title (de)
ANTIOXIDANTIENMISCHUNG FÜR HOCHVISKOSEN POLYALKYLENGLYKOLGRUNDSTOFF
Title (fr)
MÉLANGE ANTIOXYDANT POUR BASE DE POLYALKYLÈNE GLYCOL À VISCOSITÉ ÉLEVÉE
Publication
Application
Priority
- EP 18208871 A 20181128
- EP 2019081360 W 20191114
Abstract (en)
[origin: WO2020109021A1] The invention relates to a lubricant comprising a polyalkylene glycol basestock, a phenol selected from an ester of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid with a C1-18 aliphatic alcohol, and an aromatic amine of the formula (I) as defined hereinafter. The invention further relates to a method for preparing the lubricant comprising the step of contacting the polyalkylene glycol basestock, the phenol, and the aromatic amine of the formula (I); and to a method for reducing the oxidative degradation of the polyalkylene glycol basestock comprising the step of contacting the polyalkylene glycol basestock, the phenol, and the aromatic amine of the formula (I).
IPC 8 full level
C10M 169/04 (2006.01)
CPC (source: EP US)
C10M 107/34 (2013.01 - US); C10M 129/70 (2013.01 - US); C10M 133/12 (2013.01 - US); C10M 169/04 (2013.01 - EP US); C10M 2207/026 (2013.01 - EP); C10M 2207/284 (2013.01 - US); C10M 2209/1013 (2013.01 - US); C10M 2209/1075 (2013.01 - EP); C10M 2209/108 (2013.01 - EP); C10M 2215/064 (2013.01 - EP US); C10N 2020/02 (2013.01 - EP US); C10N 2020/04 (2013.01 - EP US); C10N 2030/02 (2013.01 - EP); C10N 2030/08 (2013.01 - US); C10N 2030/10 (2013.01 - EP)
Citation (search report)
See references of WO 2020109021A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020109021 A1 20200604; CN 113166672 A 20210723; EP 3887492 A1 20211006; JP 2022513145 A 20220207; US 2022041949 A1 20220210
DOCDB simple family (application)
EP 2019081360 W 20191114; CN 201980078274 A 20191114; EP 19801054 A 20191114; JP 2021530083 A 20191114; US 201917297425 A 20191114