(19)
(11) EP 4 269 545 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
13.12.2023 Bulletin 2023/50

(43) Date of publication:
01.11.2023 Bulletin 2023/44

(21) Application number: 21910991.5

(22) Date of filing: 23.12.2021
(51) International Patent Classification (IPC): 
C10M 169/04(2006.01)
C10N 40/00(2006.01)
C10M 129/36(2006.01)
C10M 133/16(2006.01)
 C10N 30/12(2006.01)
C10M 129/26(2006.01)
C10M 129/68(2006.01)
C10M 137/04(2006.01)
(52) Cooperative Patent Classification (CPC):
C10N 2040/00; C10N 2030/12; C10N 2020/02; C10N 2030/24; C10M 2223/041; C10M 2223/04; C10M 2207/026; C10M 2215/10; C10M 2207/283; C10M 2207/289; C10M 2207/125; C10M 2215/04; C10M 171/001; C10M 157/08
(86) International application number:
PCT/JP2021/047982
(87) International publication number:
WO 2022/138852 (30.06.2022 Gazette 2022/26)
(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 MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 25.12.2020 JP 2020217796

(71) Applicant: Idemitsu Kosan Co.,Ltd.
Tokyo 100-8321 (JP)

(72) Inventors:
  • SATO, Tokue
    Ichihara-shi, Chiba 299-0107 (JP)
  • GOTO, Kenji
    Ichihara-shi, Chiba 299-0107 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) LUBRICATING OIL COMPOSITION, METHOD FOR USING LUBRICATING OIL COMPOSITION, AND METHOD FOR PRODUCING LUBRICATING OIL COMPOSITION


(57) A problem is to provide a lubricating oil composition having an excellent rust inhibiting capability even containing a base oil containing a polar substance that has a function significantly deteriorating the rust inhibiting capability, and a use method and a production method of the lubricating oil composition. The problem is solved by a lubricating oil composition containing a base oil (A) and a rust inhibitor (B), in which the base oil (A) has a gas chromatogram measured by gas chromatography satisfying the particular condition (α), and the rust inhibitor (B) is one or more kind selected from the group consisting of a first rust inhibitor (B1), a second rust inhibitor (B2), a third rust inhibitor (B3), and a fourth rust inhibitor (B4), and satisfies the particular condition (β).