Antioxidants and methods of making antioxidants

Details Antioxidants and methods of making antioxidants Antioxidants and methods of making antioxidants

2006-08-15

2008-08-19

Anthony, Joseph D. (Department: 1796)

Compositions

Preservative agents

Anti-corrosion

C252S400530, C564S307000, C564S308000, C564S429000, C564S433000, C564S434000, C564S435000, C508S543000, C508S563000

Reexamination Certificate

active

07413682

ABSTRACT:
Antioxidants for industrial, automotive, and aviation lubricants and methods of making the same are provided. A process using alkylated diphenylamines; alkylated phenyl-α-naphthyl amines; and a metal catalyst to form oxidates is provided. The metal catalyst is a combination of a cation and an organic anion, for example, a metal acetylacetone. The reaction takes place in the presence of oxygen to form an antioxidant comprising oligomers of the alkylated diphenylamine and the alkylated phenyl-α-naphthyl amine, and a metal component of the catalyst.

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“PCT/US07/75696 International Search Report”, 2 pp.

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