公开(公告)号：US12252567B2

公开(公告)日：2025-03-18

申请号：US17616407

申请日：2020-06-02

Applicant: ADEKA CORPORATION

Inventor： Kenji Yamamoto ,  Tsuyoshi Hiramatsu ,  Shuhei Igarashi ,  Kazuki Marumo

IPC: C08K5/01 ,  C08F220/18

Abstract: The present invention provides an acrylate-based copolymer obtained by polymerizing constituent monomers including a polymerizable monomer (a) consisting of an alkyl acrylate-based monomer represented by the following general formula (1) in an amount of from 10 mol % to 95 mol % with respect to a total number of moles of the constituent monomers, a polymerizable monomer (b) consisting of an alkylene glycol acrylate-based monomer represented by the following general formula (2) in an amount of from 5 mol % to 50 mol % with respect to the total number of moles of the constituent monomers, and at least one kind of polymerizable monomer (c) selected from the group consisting of an aromatic vinyl-based monomer (c-1) and a short-chain alkyl acrylate-based monomer (c-2) represented by the following general formula (3) in an amount of from 0 mol % to 60 mol % with respect to the total number of moles of the constituent monomers. In the formula (1), R1 represents an alkyl group having 4 to 18 carbon atoms, and A1 represents a hydrogen atom. In the formula (2), R2 represents an alkylene group having 2 to 4 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, A2 represents a hydrogen atom, and “n” represents a number from 2 to 20. In the formula (3), R4 represents an alkyl group having 1 to 3 carbon atoms, and A3 represents a hydrogen atom.

公开(公告)号：US11760954B2

公开(公告)日：2023-09-19

申请号：US16764952

申请日：2018-11-27

Applicant: ADEKA CORPORATION

Inventor： Kenji Yamamoto ,  Shuhei Igarashi ,  Ryou Hanamura

IPC: C10M171/06 ,  C10M171/04 ,  C10N20/06 ,  C10N30/06

CPC classification number: C10M171/06 ,  C10M171/04 ,  C10M2209/084 ,  C10N2020/06 ,  C10N2030/06

Abstract: A lubricant composition containing a base oil and organic fine particles substantially consisting of the three elements of carbon, hydrogen and oxygen and having a proportion of particles having a particle diameter of 10 nm to 10 μm of 90% or greater, wherein the content of the organic fine particles is 0.01 to 50 parts by mass relative to 100 parts by mass of the base oil.