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OXIDATIVE STABILITY IMPROVER FOR LUBRICANT AND METHOD FOR IMPROVING OXIDATIVE STABILITY
OXIDATIVE STABILITY IMPROVER FOR LUBRICANT AND METHOD FOR IMPROVING OXIDATIVE STABILITY
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机译:润滑剂的氧化稳定性赋予剂和提高氧化稳定性的方法
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摘要
PURPOSE:An oxidative stability improver containing a nonbasic nitrogen compound obtained from mineral oil by concentration and separation is added to a lubricant oil such as of mineral oil, alkylbenzenes, alkylnaphthalenes or mixtures thereof. CONSTITUTION:A nonbasic nitrogen compound obtained from mineral oil by concentration and separation such as carbazole or indole, their alkyl-substituted derivative is used as a major component to give an oxidative stability improver. The product is added to a lubricant, preferably by more than 16ppm based on the nonbasic nitrogen and less than 3ppm as the basic nitrogen. EFFECT:The improver shows high solubility in the lubricant oil.
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