Viscosity index improver composition and lubricating oil composition
US11905486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2020 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Sep 24, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An object is to provide a viscosity index improver composition that is capable of properly regulating the HTHS viscosity in the effective temperature range of a lubricating oil composition to a lower range, and a lubricating oil composition containing the viscosity index improver composition, and the viscosity index improver composition contains a comb-shaped polymer (A) containing a structural unit derived from a macromonomer (α) and a structural unit derived from a particular monomer (A1), the macromonomer (α) having a (meth)acryloyl group at one end, and having a structural unit derived from a monomer (α1) selected from butadiene and hydrogenated butadiene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.