Search International and National Patent Collections

1. (WO2017038734) COPOLYMER AND LUBRICATING OIL COMPOSITION

Pub. No.:    WO/2017/038734    International Application No.:    PCT/JP2016/075129
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: C08G 63/60
C10M 129/78
C10M 145/22
C10M 169/04
C10M 101/04
C10M 105/36
C10M 105/38
C10N 20/00
C10N 20/02
C10N 30/00
C10N 30/02
C10N 30/08
C10N 40/02
C10N 40/04
C10N 40/08
C10N 40/12
C10N 40/14
C10N 40/20
C10N 40/25
C10N 40/30
C10N 50/10
Applicants: MITSUI CHEMICALS, INC.
三井化学株式会社
Inventors: KIDA, Mariko
木田 真理子
EBATA, Hiroki
江端 洋樹
KANESHIGE, Ryousuke
金重 良輔
Title: COPOLYMER AND LUBRICATING OIL COMPOSITION
Abstract:
The problem of the invention is to provide a lubricating oil composition having excellent heat resistance (suppressed discoloration upon heating) and stickiness while maintaining the excellent viscosity characteristics of lubricating oil compositions that use ricinoleic acid polymers. The invention provides: a copolymer (B) in which structural units (a) derived from ricinoleic acid, structural units (b) derived from an aliphatic dicarboxylic acid, and structural units (c) derived from a C2-10 diol are contained in a specific ratio, the copolymer (B) having a specific intrinsic viscosity; and a lubricating oil composition containing a base oil and the copolymer (B), the mass ratio (mass of (A)/mass of (B)) of the base oil (A) and the copolymer (B) in the lubricating oil composition being 60/40-99.5/0.5.