N,N'-Disubstituted 2,4'-diaminodiphenyl ethers as antioxidants
AssigneeUop LLC
InventorJohn T. Roberts
Life of this patent
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Abstract
N,N'-disubstituted 2,4'-diaminodiphenyl ethers are a potent antioxidant for petroleum products and petroleum-related products. In particular, the N,N'-dibenzyl derivative and other aromatic and hetero-aromatic analogs of the dibenzyl derivatives exhibit desirable antioxidant properties at levels as low as about 0.05% by weight.
Claims4
A composition of matter comprising a major amount of a lubricating oil or grease thereof and a minor, antioxidant amount of an additive consisting essentially of an ether of the structure:
- ##STR2## wherein A is a radical selected from the group consisting of pyridine, thiophene, pyrrole, furan, imidazole, oxazole, thiazole, quinoline and carbazole radicals.
A composition of matter comprising a major amount of a lubricating oil or grease thereof and a minor antioxidant amount of a pyridyl-substituted diaminodiphenyl ether.
Dependencies are inferred from the claim text.