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US4173540A Lubricating oil composition containing a dispersing-varnish inhibiting combination of polyol ester compound and a borated acyl nitrogen compound 失效
含有多元醇酯化合物和硼酸化酰基氮化合物的分散清漆抑制组合的润滑油组合物

Lubricating oil composition containing a dispersing-varnish inhibiting combination of polyol ester compound and a borated acyl nitrogen compound
摘要：
The combination of an oil-soluble polyol ester reaction product having a number average molecular weight (M.sub.n) of from about 1,300 to 8,000, e.g., the reaction product of polybutenyl succinic anhydride with pentaerythritol which reaction product can be borated, if desired, and an oil-soluble acylated nitrogen compound having a (M.sub.n) of from about 1,300 to 8,000, e.g. polybutenyl succinic anhydride reacted with an alkylene polyamine such as tetraethylene pentamine, which nitrogen compound can be borated, if desired, are surprisingly useful as combined additives for lubricating oils to increase the dispersancy and varnish inhibition properties of said oil when one part per weight of said polyol ester reaction product is combined with from 0.2 to 4, preferably 1 to 3, parts by weight of said acylated nitrogen compound.
摘要（中）：

具有数均分子量（Mn）为约1,300-8,000的油溶性多元醇酯反应产物的组合，例如聚丁烯基琥珀酸酐与季戊四醇的反应产物，如果需要，该反应产物可以被硼化，和 （Mn）为约1,300至8,000的油溶性酰化氮化合物，例如 与亚烷基多胺如四亚乙基五胺反应的聚丁烯基琥珀酸酐，如果需要，该氮化合物可以被硼化，令人惊讶地用作润滑油的组合添加剂，以增加所述油的分散性和清漆抑制性，当每份重量的所述 多元醇酯反应产物与0.2至4，优选1至3重量份所述酰化氮化合物组合。

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