SULFURIZED METAL ALKYL PHENATE COMPOSITIONS HAVING LOW ALKYL PHENOL CONTENT

摘要

PROBLEM TO BE SOLVED: To provide a sulfurized metal alkyl phenate composition having a low alkyl phenol content. SOLUTION: Provided herein are sulfurized metal alkyl phenate compositions having a low alkyl phenol content. The sulfurized metal alkyl phenate compositions of the invention can be prepared by reacting a phenol compound of formula (I) with an aldehyde to form a phenolic resin of formula (II) and then by reacting the phenolic resin simultaneously with a metal base and a first sulfurizing agent. The disclosed sulfurized metal alkyl phenate compositions and overbased sulfurized metal alkyl phenate compositions may be used as detergents for formulating lubricating oil compositions. The lubricating oil compositions of the invention have a reduced amount of a free phenol compound and a salt thereof. COPYRIGHT: (C)2009,JPO&INPIT