摘要:
Lubricant compositions having improved anti-deposition properties through the addition of effective amounts of polyalkyleneoxide-modified silicone oils. The silicone oils have pendant polyether groups bonded to the silicon chain by non-hydrolyzable Si-C bonds. The silicone oils have molecular weights in the range of about 200 to about 5000 .sup.g /mole.
摘要:
Provided are lubricants containing a synthetic ester, one or more additional base stocks and an additive package along with methods of making and using the same. Lubricant compositions comprise a synthetic ester that is a reaction product of at least one hindered organic polyol with one or more carboxylic acid where at least some (20%) up to 100% of the acids are branched. The lubricant compositions can provide improved oxidation stability and extended service life, as compared to a lubricant whose ester component is the reaction product of one or more hindered organic polyols and one or more carboxylic acids that are all linear, in applications that involve exposure to air, moisture, and/or high temperatures. These lubricant compositions are suited to a variety of lubricant applications, including, but not limited to air compressors, gear boxes, bearing sets, hydraulic systems, and chain drives.
摘要:
A high quality lubricant for heavy duty service air conditioner and refrigerator compressors, especially those using chlorine free hydrofluorocarbon refrigerant working fluids, is provided by mixed esters of hindered polyols, most desirably di-pentaerythritol, usually mixed with some pentaerythritol, with a mixture of carboxylic acids including at least some of each of iso-pentanoic acid and iso-nonanoic acid.
摘要:
A high quality lubricant for hermetically sealed domestic air conditioner and refrigerator compressors, especially those using chlorine free hydrofluorocarbon refrigerant working fluids, is provided by mixed esters of hindered polyols, most desirably pentaerythritol, with a mixture of carboxylic acids including at least some isopentanoic acid along with either or both of iso-nonanoic acid and dibasic acids such as adipic.
摘要:
Diesel fuels, particularly low sulfur diesel fuels, contain additives which increase the lubricity in the fuel and reduce the amount of smoke in the exhaust. These additives are esters having a viscosity of 3.0 cSt to 20.0 cSt at 100.degree. C. and a smoke index of at least 75.
摘要:
Ester base stocks for two-cycle gasoline engine lubricant compositions are disclosed which produce lower amounts of observable smoke in the exhaust emitted as a result of combustion in a two-cycle gasoline engine, require no miscibility-enhancing solvents, have a viscosity of 3.0 cSt to 20.0 cSt at 100.degree. C. and a smoke index of at least 75. Some of the esters are biodegradable.
摘要:
Improved mist lubricant compositions containing specific synthetic esters and a mixture of polyisobutylene polymers having different molecular weights are provided. Synthetic esters employed for the compositions are polyol esters, trimellitate esters, and polymeric fatty acid esters.
摘要:
Provided are lubricants containing a synthetic ester, one or more additional base stocks and an additive package along with methods of making and using the same. Lubricant compositions comprise a synthetic ester that is a reaction product of at least one hindered organic polyol with one or more carboxylic acid where at least some (20%) up to 100% of the acids are branched. The lubricant compositions can provide improved oxidation stability and extended service life, as compared to a lubricant whose ester component is the reaction product of one or more hindered organic polyols and one or more carboxylic acids that are all linear, in applications that involve exposure to air, moisture, and/or high temperatures. These lubricant compositions are suited to a variety of lubricant applications, including, but not limited to air compressors, gear boxes, bearing sets, hydraulic systems, and chain drives.
摘要:
From not more than three blending stocks, it is possible to prepare a wide variety of mixtures of esters of hindered polyhydric alcohols that are especially valuable lubricants for chlorine-free fluorocarbon refrigerant heat transfer fluids, particularly Refrigerant 134a (1,1,1,2-tetrafluoroethane).
摘要:
Stamping lubricant compositions which exhibit improved lubricity and methods for reducing friction and wear utilizing said stamping lubricant compositions.