Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 19, 2008
Patent Application Number
11464668
Date Filed
August 15, 2006
Patent Primary Examiner
Patent 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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