| (19) |
 |
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(11) |
EP 4 545 621 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.06.2025 Bulletin 2025/25 |
| (43) |
Date of publication A2: |
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30.04.2025 Bulletin 2025/18 |
| (22) |
Date of filing: 25.10.2024 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
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 ME MK MT
NL NO PL PT RO RS SE SI SK SM TR |
|
Designated Extension States: |
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BA |
|
Designated Validation States: |
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GE KH MA MD TN |
| (30) |
Priority: |
27.10.2023 US 202363593559 P
23.10.2024 US 202418924430
|
| (71) |
Applicant: Infineum International Limited |
|
Abingdon, Oxfordshire OX13 6BB (GB) |
|
| (72) |
Inventors: |
|
- Arrowsmith, Stephen
Abingdon, OX13 6BD (GB)
- Shah, Ronak
Linden, 07036 (US)
- Delamore, Oliver
Abingdon, OX13 6BD (GB)
- Keily, John
Abingdon, OX13 6BD (GB)
- Wilson, Paul
Abingdon, OX13 6BD (GB)
|
| (74) |
Representative: Hart, Richard Joseph et al |
|
Infineum UK Ltd.
Milton Hill Business & Technology Centre
Milton Hill
Abingdon, Oxfordshire OX13 6BD
Abingdon, Oxfordshire OX13 6BD (GB) |
|
| |
|
| (54) |
LUBRICANT COMPOSITIONS CONTAINING HIGH C9 DISUBSTITUTED DIPHENYLAMINE ANTIOXIDANT
CONTENT |
(57) This disclosure relates to the use of di(alkyl substituted phenyl)amine antioxidants
as additives in lubricant compositions having good oxidation properties in engine
crankcase applications, especially in compression ignited engine and or spark ignited
engine applications, where the antioxidant comprises from 0 to 10 mass% mono-C
9-alkyl substituted diphenyl amine, and 90 to 100 mass% di-C
9-alkyl substituted phenyl amines based upon the weight of the mono- and di-C
9-alkyl substituted phenyl amines, preferably where tri-C
9-alkyl substituted phenyl amines are minimized and ortho substituted di-C
9-alkyl substituted phenyl amines are minimized.