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:
Mar. 03, 2009
Filed:
Feb. 29, 2008
Yasushi Shiraki, Ichihara, JP;
Yasushi Shiraki, Ichihara, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
The present invention provides antioxidants made of an aromatic hydroxyamine derivative having a structure represented by the general formula (I): wherein R, Rand Rare each independently a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; X is a hydrogen atom or an OH group; Y is a hydrogen atom or an NHRgroup; A is a direct bond, —O—, —NH—, —SO—, —CH— or —C(CH)—, and when an OH group and an NHRgroup are introduced to a unilateral benzene ring, these groups are respectively bonded to adjacent positions of the benzene ring; and n is 0 or 1 with the proviso that when n is 0, Ris not a hydrogen atom, as well as bisaminophenol derivatives represented by the above general formula (I) wherein n is 1; Rand Rare each a hydrogen atom; X is an OH group; Y is an NHRgroup; A is —C(CH)—; and Ris isopropyl, isobutyl or isohexyl. The aromatic hydroxyamine derivatives having a structure represented by the general formula (I), in particular, the bisaminophenol derivatives as novel substances, exhibit an excellent oxidation-inhibiting property, and are usable as antioxidants or polymerization inhibitors.