公开(公告)号：US20180327689A1

公开(公告)日：2018-11-15

申请号：US15774803

申请日：2016-09-20

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Jitsuo SHINODA

IPC: C10M169/04 ,  C10M101/02 ,  C10M105/06 ,  C10M111/02 ,  C10M145/10 ,  C10M155/02 ,  C10M133/12 ,  C10M161/00

CPC classification number: C10M169/044 ,  C10M101/02 ,  C10M105/06 ,  C10M111/02 ,  C10M127/06 ,  C10M133/12 ,  C10M145/10 ,  C10M145/14 ,  C10M155/02 ,  C10M161/00 ,  C10M169/04 ,  C10M2203/065 ,  C10M2203/1025 ,  C10M2209/084 ,  C10M2215/26 ,  C10M2229/02 ,  C10N2230/02 ,  C10N2230/10 ,  C10N2230/18 ,  C10N2240/08 ,  C10N2240/14 ,  C10N2240/30

Abstract: Provided is a lubricating oil composition containing a refined paraffinic mineral oil (A) and an alkylbenzene (B) having a flash point of 160° C. or higher, and having a flash point of 250° C. or higher. The lubricating oil composition has a high flash point of 250° C. or higher and has an excellent long lifetime to such an extent that the lubricating oil composition can maintain excellent oxidation stability even in long-term use in high-temperature environments.

公开(公告)号：US20160032214A1

公开(公告)日：2016-02-04

申请号：US14779486

申请日：2014-02-10

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Jitsuo SHINODA ,  Shinji AOKI

IPC: C10M161/00

Abstract: A lubricating oil composition contains: a base oil with a kinematic viscosity at 40 degrees C. in a range from 1 mm2/s to 200 mm2/s, a viscosity index of 80 or more and a sulfur content of less than 0.03 mass %; a component (A) being a polyacrylate compound with a mass average molecular weight in a range from 10,000 to 100,000; and a component (B) being at least one of phosphorus compounds represented by a formula (1) below. A content of the component (B) is in a range from 0.05 mass % to 2.0 mass % of a total amount of the composition, and a viscosity index of the composition is 160 or more.

Abstract translation: 润滑油组合物含有：在40℃下的运动粘度为1 / 2mm〜200mm 2 / s，粘度指数为80以上，硫含量为0.03质量％以下的基油; 组分（A）是质量平均分子量在10,000至100,000范围内的聚丙烯酸酯化合物; 和组分（B）是由下式（1）表示的磷化合物中的至少一种。 组分（B）的含量在组合物总量的0.05质量％至2.0质量％的范围内，并且组合物的粘度指数为160以上。

公开(公告)号：US20180282655A1

公开(公告)日：2018-10-04

申请号：US15559674

申请日：2016-03-18

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Jitsuo SHINODA

IPC: C10M169/04 ,  C10M129/10 ,  C10M133/44 ,  C10M129/95 ,  C10M129/54 ,  C10M137/04 ,  C10M129/34 ,  C10M133/12 ,  C10M141/06 ,  C10M141/10

Abstract: The lubricating oil composition of the present invention contains a base oil, a 2,6-di-tert-butylphenol (A), and at least one compound (B) selected from a benzotriazole compound and a sorbitan compound.

公开(公告)号：US20180003618A1

公开(公告)日：2018-01-04

申请号：US15542755

申请日：2016-01-13

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Jitsuo SHINODA

IPC: G01N21/25 ,  B01D61/00 ,  G01N21/94 ,  G01N33/28 ,  G01N21/3577 ,  G01N21/35

CPC classification number: G01N21/251 ,  B01D61/00 ,  G01J3/50 ,  G01N21/25 ,  G01N21/3577 ,  G01N21/94 ,  G01N33/2835 ,  G01N33/2888 ,  G01N2021/3595 ,  G01N2201/12

Abstract: A management method of a lubricating oil of the invention is a method of managing a lubricating oil by determining a degradation degree of the lubricating oil containing an antioxidant, specifically, according to determination methods a and b below. The determination method a includes: measuring an infrared ray absorption spectrum of the lubricating oil using a Fourier transform infrared spectrometer; and calculating a total content of the antioxidant and an altered substance having an antioxidant function to determine a deterioration degree of the lubricating oil from the obtained content. The determination method b includes: filtrating the lubricating oil with a filter; subsequently measuring a color difference of substances captured by the filter using a colorimeter, or measuring a color difference of the lubricating oil using the colorimeter; and determining a degradation degree of the lubricating oil and a mixture degree of foreign substances based on the obtained color difference.