The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2012
Filed:
Nov. 24, 2008
Jun Dong, Cheshire, CT (US);
Jun Dong, Cheshire, CT (US);
Chemtura Corporation, Middlebury, CT (US);
Abstract
The invention relates to antioxidant compositions for lubricants and organic polymers comprising a first antioxidant comprising a reaction product of p-cresol, dicyclopentadiene and isobutylene; and a second antioxidant comprising a diarylamine. The first antioxidant preferably has the structure: wherein n is 0-50, and Rand Rare independently hydrogen, a straight or branched C-Calkyl or alkylene group optionally substituted with one or more substituents, C-Ccycloalkyl, C-Caryl, or C-Calkylaryl. The second antioxidant preferably has the formula:(R)—Ar—NH—Ar—(R)wherein Arand Arare independently aromatic hydrocarbon groups and Rand Rare independently hydrogen or hydrocarbyl groups having from 6 to about 100 carbon atoms and a and b are independently 0 to 3 but (a+b) is not greater than 4.