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公开(公告)号：EP3733823A1
公开(公告)日：2020-11-04
申请号：EP18894819.4
申请日：2018-12-20
发明人： WATANABE, Go
IPC分类号： C10M169/06 , C10M171/02 , C10M117/00 , C10M135/02 , C10M137/10 , C10N10/02 , C10N10/04 , C10N20/00 , C10N20/02 , C10N30/06 , C10N40/00 , C10N40/02 , C10N50/10
摘要： Provided is a grease composition which contains (A) a mixed base oil containing (A1) a low-viscosity base oil having a kinematic viscosity at 40°C of 10 to 50 mm 2 /s and (A2) a high-viscosity base oil having a kinematic viscosity at 40°C of 200 to 700 mm 2 /s, (B) a lithium-based thickener and (C) a polymer having a kinematic viscosity at 100°C of 1,000 to 100,000 mm 2 /s, and has an apparent viscosity at -10°C, as measured according to JIS K2220:2013 and at a shear rate of 10 s -1 , of 50 to 250 mPa·s. The grease composition is excellent in pumpability and is also excellent in wear resistance under poor lubrication conditions.
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公开(公告)号：EP4317382A1
公开(公告)日：2024-02-07
申请号：EP22781326.8
申请日：2022-03-31
发明人： WATANABE, Go , INDA, Keisuke , TAKANE, Kouji
IPC分类号： C10M169/06 , C10M171/00 , C10M171/06 , C10N20/00 , C10N20/06 , C10N30/06 , C10N50/10 , C10M105/32 , C10M115/08 , C10M133/04 , C10M133/16 , C10M133/42 , C10M149/16
摘要： Provided is a grease composition containing a base oil (A), a urea-based thickener (B), and melamine cyanurate (C), wherein particles containing the urea-based thickener (B) in the grease composition satisfy the following requirement (I), and the grease composition has excellent wear resistance. Requirement (I): The particles have an area-based arithmetic average particle diameter of 2.0 µm or less, as measured by a laser diffraction/scattering method. It is preferred that the particles containing the urea-based thickener (B) in the grease composition further satisfy the following requirement (II). Requirement (II): The particles have a specific surface area of 0.5 × 10 5 cm 2 /cm 3 or more, as measured by a laser diffraction/scattering method.
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公开(公告)号：EP3620501A1
公开(公告)日：2020-03-11
申请号：EP18793857.6
申请日：2018-04-27
发明人： SEKIGUCHI, Hiroki , WATANABE, Go
IPC分类号： C10M169/02 , C10M105/06 , C10M115/08 , C10N20/00 , C10N20/02 , C10N30/00 , C10N40/02 , C10N50/10
摘要： Provided is a grease composition including a base oil (A) containing an alkyl naphthalene (A1) and an aliphatic diurea (B) represented by general formula (b1):
R 1 -NHCONH-R 3 -NHCONH-R 2 (b1)
(wherein, R 1 and R 2 each independently represent a monovalent aliphatic hydrocarbon group having 9 to 20 carbon atoms, and R 3 represents a divalent aromatic hydrocarbon group having 6 to 18 carbon atoms),
wherein a content of the aliphatic diurea (B) is 20 to 30% by mass based on a total amount of the grease composition.-
公开(公告)号：EP3677661A1
公开(公告)日：2020-07-08
申请号：EP18850947.5
申请日：2018-08-22
发明人： WATANABE, Go , SHISHIKURA, Akihiro , KOGA, Asami
IPC分类号： C10M115/08 , C10M129/10 , C10M129/74 , C10M133/04 , C10N20/02 , C10N20/06 , C10N30/10 , C10N30/12 , C10N40/02 , C10N40/04 , C10N50/10
摘要： A grease composition containing a base oil (A), a urea-based thickener (B), an antioxidant (C), and a rust inhibitor (D), wherein in a particle size distribution curve obtained by measuring the particle size of particles containing the urea-based thickener (B) in the grease composition on a volume basis with light scattering, a peak indicating the maximum frequency satisfies the following Requirements (I) and (II):
(I) a particle size indicating the maximum frequency of the peak is 1.0 µm or less; and
(II) a half width of the peak is 1.0 µm or less.-
公开(公告)号：EP4365269A1
公开(公告)日：2024-05-08
申请号：EP22833190.6
申请日：2022-06-29
发明人： WATANABE, Go
IPC分类号： C10M169/06 , C10N30/00 , C10N40/04 , C10N50/10 , C10M115/08
CPC分类号： C10N2040/0420130101 , C10N2050/1020130101 , C10M169/06 , C10N2030/0020130101 , C10M115/08
摘要： Provided is a grease composition containing a base oil (A), a urea-based thickener (B), and a hardening agent for fat and/or fatty oil (C), in which particles containing the urea-based thickener (B) in the grease composition satisfy the following requirement (I), liquefy when heated to a certain temperature or higher, return to a solid state when returned to ordinary temperature after heated to a certain temperature or higher, have high responsiveness to application of shear stress, and are easily softened when shear stress is applied. • Requirement (I): an arithmetic average particle diameter of the particles on an area basis as measured by a laser diffraction and scattering method is 2.0 µm or less.
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公开(公告)号：EP4130210A1
公开(公告)日：2023-02-08
申请号：EP21780915.1
申请日：2021-03-16
发明人： WATANABE, Go
IPC分类号： C10M169/02 , C10N20/00 , C10N20/02 , C10N20/04 , C10N20/06 , C10N30/00 , C10N30/02 , C10N30/06 , C10N40/02 , C10N40/04 , C10N50/10 , C10M107/02 , C10M115/08
摘要： The present invention provides a grease composition containing a base oil (A) and a urea-based thickener (B). Particles containing the urea-based thickener (B) in the grease composition satisfy a requirement (I). The base oil (A) is a mixed base oil containing a high-viscosity base oil (A1) having a kinematic viscosity at 40°C of 250 mm 2 /s to 550 mm 2 /s, a low-viscosity base oil (A2) having a kinematic viscosity at 40°C of 5.0 mm 2 /s to 110 mm 2 /s, and an ultra-high viscosity hydrocarbon-based synthetic oil (A3) having a number average molecular weight (Mn) of 2,500 to 4,500 and a kinematic viscosity at 40°C of 25,000 mm 2 /s to 50,000 mm 2 /s. The base oil (A) has a kinematic viscosity at 40°C of 25 mm 2 /s to 105 mm 2 /s and a viscosity index of 120 or more. Both low-temperature characteristics and a lubricating life can be achieved.
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公开(公告)号：EP4130209A1
公开(公告)日：2023-02-08
申请号：EP21778893.4
申请日：2021-03-16
发明人： WATANABE, Go
IPC分类号： C10M169/00 , C10N10/04 , C10N20/02 , C10N20/04 , C10N20/06 , C10N30/00 , C10N30/08 , C10N40/02 , C10N40/04 , C10N50/10 , C10M107/02 , C10M115/08 , C10M129/28 , C10M129/40 , C10M133/16
摘要： Provided is a grease composition having an excellent low temperature characteristic and further capable of suppressing stick slip, which contains a base oil (A), a urea-based thickener (B), a sarcosine derivative (C), and a fatty acid zinc salt (D), wherein particles containing the urea-based thickener (B) in the grease composition satisfies Requirement (I), the base oil (A) is a blended base oil containing a high viscosity hydrocarbon-based synthetic oil having a specific kinematic viscosity (A1), a low viscosity hydrocarbon-based synthetic oil having a specific kinematic viscosity (A2), and an ultra-high viscosity hydrocarbon-based synthetic oil having a number average molecular weight (Mn) of 2,500 to 4,500 and a specific kinematic viscosity (A3), a 40°C kinematic viscosity of the base oil (A) is 500 mm 2 /s to 1,500 mm 2 /s, a viscosity index of the base oil (A) is 140 or more, and a content of the fatty acid zinc salt (D) is 10 mass% to 20 mass% based on a total amount of the grease composition.
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公开(公告)号：EP3919592A1
公开(公告)日：2021-12-08
申请号：EP20749088.9
申请日：2020-01-31
IPC分类号： C10M169/02 , C10N20/02 , C10N20/06 , C10N30/00 , C10N40/02 , F16C33/10 , C10M115/08
摘要： The present invention relates to a grease composition which can impart excellent durability to a bearing used under a high-speed rotation condition with a DN value of 100,000 or more, wherein the grease composition contains a base oil (A) and a urea-based thickener (B), and particles containing the urea-based thickener (B) in the grease composition satisfy requirement (I) that the particles have an arithmetic mean particle diameter of 2.0 pm or less on an area basis when measured by a laser diffraction scattering method. The grease composition is used for a bearing used under a high-speed rotation condition with a DN value of 100,000 or more.
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公开(公告)号：EP4317381A1
公开(公告)日：2024-02-07
申请号：EP22781324.3
申请日：2022-03-31
发明人： INDA, Keisuke , WATANABE, Go , TAKANE, Kouji
IPC分类号： C10M169/06 , C10M171/04 , C10N20/00 , C10N20/04 , C10N30/06 , C10N40/02 , C10N50/10 , C10M107/06 , C10M115/08 , C10M143/04
摘要： The present invention provides a grease composition containing a base oil (A), a urea-based thickener (B), and a polymer compound (C), wherein particles that contain the urea-based thickener (B) in the grease composition satisfying the following requirement (I), the polymer compound (C) having a number average molecular weight (Mn) of 30,000 or more and a molecular weight distribution (Mw/Mn) of 2.20 or less, the grease composition being superior in reduction of friction coefficient under conditions of low speed and low load. Requirement (I): the particles have an arithmetic average particle diameter on an area basis as measured by a laser diffraction/scattering method of 2.0 pm or less.
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10.发明公开
公开(公告)号：EP3936590A1
公开(公告)日：2022-01-12
申请号：EP20766382.4
申请日：2020-02-27
发明人： WATANABE, Go
IPC分类号： C10M169/00 , C10M169/02 , C10N20/02 , C10N30/06 , C10N40/00 , C10N50/10 , F16C11/06 , C10M115/08 , C10M133/04 , C10M133/06 , C10M133/16 , C10M133/54 , C10M133/56
摘要： The present invention addresses a problem of providing a grease composition containing a urea-based thickener and capable of appropriately maintaining the kinematic friction force in lubrication parts. The grease composition contains a base oil (A) and a urea-based thickener (B), wherein the base oil (A) has a kinematic viscosity at 40°C of 100 mm 2 /s or more, and the particles containing the urea-based thickener (B) in the grease composition satisfy the following requirement (I). Requirement (I): the area-based arithmetic average particle diameter of the particles is 2.0 pm or less, as measured by a laser diffraction/scattering method.
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