公开(公告)号：US20220275304A1

公开(公告)日：2022-09-01

申请号：US17636823

申请日：2020-08-26

Applicant: MITSUI CHEMICALS, INC.

Inventor： Akio HAYAKAWA ,  Shuhei YAMAMOTO ,  Akihiro UDAGAWA ,  Masahiro YAMASHITA ,  Yusuke SAITO

IPC: C10M169/04 ,  C10M101/00 ,  C10M143/08

Abstract: A lubricating oil composition with a resin (A) and a base oil (B), the resin (A) is in a range of 0.01 to 50 parts by mass per 100 parts of (A) and (B), the resin (A) satisfies the following requirements: (A-1) the resin (A) is a polymer including a constituent unit from 4-methyl-1-pentene in a range of 60 to 99 mol % and a constituent unit from an α-olefin having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene) in a range of 1 to 40 mol % (provided that 4-methyl-1-pentene and the α-olefin is 100 mol %); (A-2) intrinsic viscosity [η] measured in decalin at 135° C. is in a range of 0.01 to 5.0 dl/g; (A-3) a melting point (Tm) is in a range of 110 to 150° C. as determined by DSC; and the base oil (B) has (B-1) kinematic viscosity at 100° C. is in a range of 1 to 50 mm2/s.

公开(公告)号：US20200071443A1

公开(公告)日：2020-03-05

申请号：US16466607

申请日：2017-12-07

Applicant: MITSUI CHEMICALS, INC.

Inventor： Akihide MORI ,  Masahiko OKAMOTO ,  Katsuyoshi HARADA ,  Takahiro YAMADA ,  Shuhei YAMAMOTO ,  Kiyoshi TAKAHASHI ,  Kiyoshi YAMAMURA ,  Koutarou SUZUKI ,  Ryouichi SEKI ,  Shinya MATSUNAGA

IPC: C08F255/04 ,  C08F255/02 ,  C08J5/24 ,  C08J5/18 ,  C09D175/04 ,  C09D133/04 ,  C09D7/40 ,  C09D7/65 ,  C10M107/28 ,  C10M107/30 ,  B01D39/16

Abstract: A graft copolymer (C) having a main chain portion of a precursor polymer (A) and a graft portion from a polymer (B), wherein a core portion of the solid product comprises the main chain portion derived from (A), a shell portion comprises the graft portion derived from (B), and the solid product satisfies: Infrared absorption spectroscopic measurement of a section passing through a center (x) of the solid product, a point (z) on a surface where a distance between the center (x) and the surface is shortest, and a middle point (y) of a line connecting the center (x) and the point (z), absorbance (Abs) satisfies X

公开(公告)号：US20240384197A1

公开(公告)日：2024-11-21

申请号：US18694039

申请日：2022-09-28

Applicant: MITSUI CHEMICALS, INC.

Inventor： Takayuki UEKUSA ,  Kiyohide INOMATA ,  Akihiro UDAGAWA ,  Shuhei YAMAMOTO

IPC: C10M143/08 ,  C10M101/02 ,  C10M169/04 ,  C10N20/02 ,  C10N30/02

Abstract: An object of the present invention is to provide a lubricating oil composition that is particularly excellent in viscosity characteristics at a low temperature of −35° C., i.e., the lubricating oil composition inhibiting an increase in low temperature viscosity while securing a viscosity necessary at an elevated temperature, and being excellent in storage stability in a low temperature environment. The present invention relates to a lubricating oil composition including a copolymer (A) and a base oil (B), in which the copolymer (A) satisfies the following requirement (a-1), and the content ratio between the copolymer (A) and the base oil (B) is such that the copolymer (A) is in a range of 0.1 to 50 parts by mass per 100 parts by mass in total of the copolymer (A) and the base oil (B). (a-1) The copolymer (A) is a copolymer of 4-methyl-1-pentene and an α-olefin having 20 or less carbon atoms excluding 4-methyl-1-pentene, including a constituent unit derived from 4-methyl-1-pentene within a range of 1 mol % or more and less than 30 mol % relative to the total constituent units.