[EN] MULTI-RING ANTIOXIDANTS WITH ANTIWEAR PROPERTIES<br/>[FR] ANTIOXYDANTS MULTI-NOYAUX AVEC DES PROPRIÉTÉS ANTI-USURE
申请人:ALBEMARLE CORP
公开号:WO2010011523A2
公开(公告)日:2010-01-28
Described are multi-ring antioxidant products comprising at least one sulfur- bridged aromatic hydrocarbon compound substituted on at least one of its aromatic rings by at least one sterically hindered 3,5-dihydrocarbyl-4-hydroxybenzyl moiety. Such products have the formula : R-Sn-R[-S-R]m wherein each R is, independently, an aromatic hydrocarbon group having 6-12 carbon atoms, wherein m is 0-20, wherein n is 1-6 when m is 0, and when n is 1, m is 1-20; and wherein at least one of R, R1, and R2 is substituted by at least one such sterically hindered moiety. The preparation of such products and their use as antioxidants in compositions normally susceptible to oxidative degradation in oxygen or air, e.g., liquid fuel and lubricants, are also described.