本公开描述了实现通过钢腐蚀、通过高温沉积物形成和乳液稳定性的低灰分润滑组合物。 该润滑组合物包括一种或多种选择的腐蚀或防锈化学物质,其具有带有酸性、羟基或胺部分但不含亚胺、酰亚胺和/或脒部分的油溶性无环结构。
一种铵基离子液体化合物,其包含三正辛基甲基铵阳离子和羧酸根阴离子。 包含它的润滑剂组合物,及其作为润滑剂、特别是船用润滑剂中的清净剂和/或抗腐蚀添加剂的用途。
本公开涉及具有改善的摩擦性能的润滑组合物。 润滑组合物包括润滑粘度的油和摩擦改进剂,摩擦改进剂是脂肪族二醇或多元醇的C10至C14烯基羧酸酯,其中烯基的双键在最长的连续链内或直接连接到最长的连续链上 烯基。
本公开描述了当维持选定的硫、磷和氮的比例时,使用一种或多种琥珀酰亚胺分散剂、一种或多种无灰抗磨添加剂和一种或多种抗氧化剂实现活塞清洁度的无清净剂和低灰分润滑组合物。
(i)n、n+1、n+2、n+3及びn+4個の炭素原子を有する一連の複数のイソパラフィン、及び/又は(ii)n、n+2及びn+4個の炭素原子を有するが、n+1及びn+3個(但し、以上のnは15〜40)の炭素原子を持たない一連の複数のイソパラフィンを含有する基油を含む潤滑油と、パラフィン含有量が80重量%を超え、かつ飽和物含有量が98重量%を超えるパラフィン系ガス油成分を5〜100重量%含む燃料組成物とを組合せたディーゼルエンジン用潤滑油·燃料組成物組合せパッケージ、及びこれをエンジン操作中の窒素酸化物の減少に使用する。 【選択図】図1
ynthetic lubricants containing (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxy groups and 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms blended with (B) 85 to 55 weight percent of one or more polyoxyalkylene glycols or their mono- or dialkyl ethers having a 400-5000 number average molecular weight. The blends are compounded with antioxidants, corrosion inhibitors, and metal deactivators to produce a superior lubricant for rotary screw compressors that has a long life.
A composition of an oil of lubricating viscosity, an antioxidant, an anti-nitration agent, and optionally a borated product of an epoxide or the reactive equivalent of an epoxide, provides a desirable lubricant for diesel or natural gas-fueled engines. The composition is substantially free from metals and preferably substantially free from phosphorus. The amount of the antioxidant the anti-initration agent are sufficient to reduce the amount of varnish formation in a natural gas engine.
含有至少一种VI改进剂、0至约5质量％的润滑油流动性改进剂(LOFI)和稀释油的粘度指数(VI)改进剂浓缩物，其中稀释油的kv100至少是3.0cSt，在－35℃下的CCS小于3700cPs，其中至少98质量％所述的浓缩物由VI改进剂、LOFI和稀释油所组成。
In accordance with the present invention, there are provided ashless heavy duty diesel lubricating oil compositions which comprise an oil of lubricating viscosity as the major component and as the minor component (A) at least 3 wt.% of at least one ashless dispersant, (B) at least 2 wt.% of at least one sulfurized alkyl phenol, and (C) at least 0.1 wt.% of at least one organo-sulfur compound of the formula wherein R⁴ and R⁵ are straight or branched chain alkyl, cyclic, alicyclic, aryl, alkylaryl or arylalkyl radicals having from 2 to about 30 carbon atoms, and w and z are numbers from 1 to about 8 wherein the lubricating oil is characterized by a total sulfated ash (SASH) level of less than 0.01 wt.%.
