Hydrogenated polymers with a radial structure having a core based on calixarenes and use thereof in lubricant compositions
US11078437B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 27, 2020 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from: —hydrogenated homopolymers or co-polymers of conjugated dienes; or—hydrogenated co-polymers of said conjugated dienes and monoalkenyl arenes, and—mixtures thereof said formula (I) in which: —R1, R2, R3 and R4 are independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms; —one of the two substituents R5 and R6 is hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6, preferably methyl and ethyl; —n is an integer in the range between 4 and 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.