Oil with asymmetric radial polymer having block copolymer arm
US5616542A · kind A · utility
4Cited by
21References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil composition containing a hydrogenated radial polymer having three rubbery diene arms and one block copolymer arm having a terminal resinous block is provided. It has been found that these asymmetric radial components impart a disproportionately good high temperature/high shear rate viscosity, thus enhancing oil performance under the severe conditions encountered in many modern internal combustion engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.