公开(公告)号：US20220348839A1

公开(公告)日：2022-11-03

申请号：US17763368

申请日：2020-09-23

Applicant: JTEKT CORPORATION ,  ENEOS CORPORATION

Inventor： Kazunori MIYAKE ,  Kiyomi SAKAMOTO ,  Yusuke AYAME ,  Go TATSUMI

IPC: C10M169/02 ,  C10M105/38 ,  C10M115/08

Abstract: A grease composition including: an ester base oil; and a thickener, in which the thickener contains diurea expressed by the following formula (1): R1-NHCONH-C6H4-CH2-C6H4-NHCONH-R2 (1), in which R1 and R2 each independently represents one of: (A) an alicyclic group A expressed by R3-C6H10- (R3 represents hydrogen, a 2-methyl group, a 3-methyl group, or a 4-methyl group); (B) an alkyl group B expressed by n-CmH2m+1 (m represents an integer of 6 to 10); and (C) an alkyl group C expressed by n-CmH2m+1 (m represents an integer of 16 to 20), and in which the diurea is arranged so that the alicyclic group A is 5 to 35 mol %, a total of the alicyclic group A and the alkyl group B is 55 to 95 mol %, and the remainder is the alkyl group C, based on a total of R1 and R2.

公开(公告)号：US20230323240A1

公开(公告)日：2023-10-12

申请号：US18020743

申请日：2021-08-10

Applicant: JTEKT CORPORATION ,  ENEOS CORPORATION

Inventor： Takeshi TSUDA ,  Yurie HAGINO ,  Kazumi SAKAI ,  Yusuke AYAME ,  Go TATSUMI ,  Kiyomi SAKAMOTO

IPC: C10M105/18 ,  C10M115/08 ,  C10M137/02 ,  C10M169/00 ,  C10M135/20 ,  C10M141/10 ,  C10M135/10

CPC classification number: C10M169/00 ,  C10M105/18 ,  C10M115/08 ,  C10M135/10 ,  C10M135/20 ,  C10M137/02 ,  C10M141/10 ,  C10M2207/0406 ,  C10M2215/1026 ,  C10M2219/044 ,  C10M2219/046 ,  C10M2219/08 ,  C10M2223/049 ,  C10N2030/43

Abstract: A grease composition including: a base oil; a thickener; a zinc sulfonate; a polysulfide; an overbased calcium sulfonate; and triphenyl phosphite, in which a proportion of the zinc sulfonate with respect to a total mass of the base oil and the thickener is 0.030 mass% to 0.045 mass% in terms of a zinc content, a proportion of the polysulfide with respect to the total mass of the base oil and the thickener is 0.16 mass% to 0.24 mass% in terms of a sulfur content, a proportion of the overbased calcium sulfonate with respect to the total mass of the base oil and the thickener is 0.010 mass% to 0.015 mass% in terms of a calcium content, and a proportion of the triphenyl phosphite with respect to the total mass of the base oil and the thickener is 0.24 mass% to 0.36 mass%.

公开(公告)号：US20230212474A1

公开(公告)日：2023-07-06

申请号：US17928054

申请日：2021-04-07

Applicant: JTEKT CORPORATION ,  ENEOS Corporation

Inventor： Koji YOSHIZAKI ,  Kazunori MIYAKE ,  Kazumi SAKAI ,  Yusuke AYAME ,  Kiyomi SAKAMOTO

IPC: C10M107/02 ,  C10M115/08 ,  C10M135/10 ,  C10M137/10 ,  C10M169/06 ,  F16C19/38 ,  F16C33/66

CPC classification number: C10M107/02 ,  C10M115/08 ,  C10M135/10 ,  C10M137/10 ,  C10M169/06 ,  F16C19/38 ,  F16C33/66 ,  C10M2205/0206 ,  C10M2215/1026 ,  C10M2223/045 ,  C10M2219/044 ,  C10N2010/04

Abstract: There is provided a grease composition for improving the chemical stability of the grease composition and increasing the fatigue life of a member in which the grease composition is used. The problems can be solved by a grease composition including a poly-α-olefin; a urea-based thickener; molybdenum dithiophosphate; and barium sulfonate, wherein a difference between an SP value of the urea-based thickener and an SP value of the poly-α-olefin is 3.5 or less.

公开(公告)号：US20180298304A1

公开(公告)日：2018-10-18

申请号：US15580127

申请日：2016-06-09

Applicant: JTEKT CORPORATION ,  JXTG NIPPON OIL & ENERGY CORPORATION

Inventor： Koji YOSHIZAKI ,  Hiroshi INUKAI ,  Yoichiro SANKAI ,  Shinji YAMANE ,  Hideo SHIBATA ,  Hirofumi INOUE ,  Ryuji NAKATA ,  Kazumi SAKAI ,  Kentaro YAMAGUCHI ,  Kiyomi SAKAMOTO

IPC: C10M169/06 ,  F16C33/66 ,  C10M107/02 ,  C10M115/08 ,  C10M141/10

Abstract: Provided is a grease composition containing a base oil, a thickener, and an additive. The base oil contains a poly-α-olefin and has a kinematic viscosity of 20-60 mm2/s at 40° C. The thickener contains a urea compound produced by reacting a diisocyanate compound with a mixed amine containing an alicyclic amine and an aromatic amine. The additive contains a phosphorous acid ester, an ether compound, and an oxidized paraffin.