Antioxidant hydrazides and derivatives thereof having multifunctional activity
View Patent ↗A composition of matter is disclosed wherein the composition comprises a hydrazide compound of the formula: wherein: R 1 is selected from the group consisting of alkyl, alkyl ether, and phenyl; R 2 , R 3 , R 4 , R 5 , and R 6 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl; and n is an integer of from 0 to 10; and wherein: when R 1 is phenyl, it is of the structure: wherein R 7 , R 8 , and R 9 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl, or R 7 can be combined with R 8 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.
1. A composition of matter comprising a hydrazide compound of the formula:
wherein:
R 1 is selected from the group consisting of alkyl, alkyl ether, and phenyl;
R 2 , R 3 , R 4 , R 5 , and R 6 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl; and
n is an integer of from 0 to 10;
and wherein:
when R 1 is phenyl, it is of the structure:
wherein R 7 , R 8 , and R 9 are independently selected from the group consisting of hydrogen, alkyl, alkyl ether, and aryl, or R 7 can be combined with R 8 to form a ring of 5 or 6 carbon atoms.
2. The composition of claim 1 wherein the hydrazide compound is of the structure:
3. The composition of claim 1 wherein the hydrazide compound is of the structure:
4. The composition of claim 1 wherein the hydrazide compound is of the structure: