发明名称 |
Additives and lubricating oil compositions containing same |
摘要 |
Para-alkylated substituted diphenylamines are made by catalytically alkylating diphenylamine with a branched-chain alkene, such as propene, oligomer mixture in which the oligomer present in the greatest percentage has 15-24 carbon atoms. The alkylated diphenylamines are useful crankcase lubricant additives such as for reducing piston deposits and engine sludge. |
申请公布号 |
US8999903(B2) |
申请公布日期 |
2015.04.07 |
申请号 |
US200812602204 |
申请日期 |
2008.06.06 |
申请人 |
Infineum International Limited |
发明人 |
Arrowsmith Stephen;Booth Christopher J.;Burrows Aubrey L.;Wilson Paul;Milne Neal J.;Wangkan Lin;Emert Jacob;Chambard Laurent |
分类号 |
C10M169/04;C10M133/12;C10M141/08;C07C209/68;C09K15/08;C09K15/18 |
主分类号 |
C10M169/04 |
代理机构 |
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代理人 |
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主权项 |
1. A method of preparing a para-alkyl-substituted diphenylamine comprising catalytically alkylating diphenylamine with an alkylating agent in the form of a mixture of branched-chain propene oligomers, wherein greater than 50% of the oligomer that is present is C15 oligomer, and oligomers having 9 or fewer carbon atoms and oligomers having from 24 or more carbon atoms constitute 10% or less of the mixture, all percentages being area/area as measured chromatographically; and wherein the mole ratio of alkylating agent to diphenylamine is in the range of 1:3 to 1.5:1. |
地址 |
GB |