Antioxidant hydrazides and derivatives thereof having multifunctional activity
US7375061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2004 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Oct 28, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/09
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition of matter is disclosed wherein the composition comprises a hydrazide compound of the formula:wherein:R1 is selected from the group consisting of alkyl, alkyl ether, and phenyl;R2, R3, R4, R5, and R6 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl; andn is an integer of from 0 to 10;and wherein:when R1 is phenyl, it is of the structure:wherein R7, R8, and R9 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl, or R7 can be combined with R8 to form a ring of 5 or 6 carbon atoms.The hydrazides are useful as stabilizers for lubricants, greases, and polymeric systems, particularly lubricating oils, as are maleated polymers that have been functionalized with them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.