公开(公告)号：US20180320102A1

公开(公告)日：2018-11-08

申请号：US15770041

申请日：2016-11-07

Applicant: MITSUI CHEMICALS, INC.

Inventor： Akio HAYAKAWA ,  Yasushi YANAGIMOTO ,  Atsushi YAMAMOTO ,  Tatsuya NAKAMURA ,  Tomoaki MATSUGI ,  Keiji OKADA

IPC: C10M143/02 ,  C10M143/04 ,  C08F10/02 ,  C08F10/06 ,  C08F4/6592

CPC classification number: C10M143/02 ,  C08F4/65922 ,  C08F10/02 ,  C08F10/06 ,  C08F255/04 ,  C08F2500/02 ,  C08F2500/17 ,  C10M143/00 ,  C10M143/04 ,  C10N2030/02 ,  C10N2230/02

Abstract: A viscosity modifier for lubricating oils according to the present invention contains a resin (α), wherein the resin (α) satisfies specific requirements, and contains a grafted olefin polymer [R1] which is composed of a main chain and a side chain(s) and which satisfies the following requirements (i) and (ii). (i) The main chain is composed of a copolymer of ethylene and at least one α-olefin selected from α-olefins having from 3 to 12 carbon atoms, and contains the structural units derived from ethylene within the range of from 74 to 86 mol %. (ii) The side chain(s) is/are composed of a copolymer of ethylene and at least one α-olefin selected from α-olefins having from 3 to 12 carbon atoms, and contain(s) the structural units derived from ethylene within the range of from 30 to 65 mol %.

公开(公告)号：US20170175028A1

公开(公告)日：2017-06-22

申请号：US15127698

申请日：2015-03-27

Applicant: MITSUI CHEMICALS, INC. ,  THE LUBRIZOL CORPORATION

Inventor： Atsushi YAMAMOTO ,  Terufumi SUZUKI ,  Kenta IDE ,  Chor HUANG

IPC: C10M143/06 ,  C10M145/14

CPC classification number: C10M143/06 ,  C08F210/16 ,  C10M143/08 ,  C10M145/14 ,  C10M2203/1025 ,  C10M2205/022 ,  C10M2205/026 ,  C10M2205/0285 ,  C10M2207/026 ,  C10M2209/084 ,  C10M2215/064 ,  C10M2223/045 ,  C10N2210/01 ,  C10N2210/02 ,  C10N2220/021 ,  C10N2220/022 ,  C10N2220/032 ,  C10N2230/02 ,  C10N2230/54 ,  C10N2230/68 ,  C10N2240/10 ,  C08F210/08 ,  C08F2500/03 ,  C08F2500/17 ,  C08F2500/08 ,  C08F210/06 ,  C10M2205/028

Abstract: Provided are a viscosity modifier for lubricating oils for obtaining an additive composition for lubricating oils having excellent fluidity in a wide temperature range from low temperature to high temperature; and said additive composition for lubricating oils. Further provided are a viscosity modifier for lubricating oils for obtaining a lubricating oil composition capable of reducing viscosity in good balance in a wide temperature range from low temperature to high temperature; and said lubricating oil composition. The viscosity modifier for lubricating oils includes an ethylene α-olefin copolymer (A) which includes 30 to 50 mole % of structural units derived from at least one α-olefin selected from α-olefins having 4 and 5 carbon atoms and 50 to 70 mole % of structural units derived from ethylene (with the proviso that the total of all structural units of said copolymer is 100 mole %) and which satisfies specific requirements (a), (b), and (c).