Abstract:
A low emissions, high oxidative stability crankcase lubricating oil formulation which is prepared from a base stock which comprises at least one synthetic ester selected from the group consisting of: polyol esters, synthetic esters having between 5-35 % unconverted hydroxyl groups, based on the total amount of hydroxyl groups in the polyol, and synthetic esters combined with at least one additional functional group which is capable of increasing the polarity of the functionalized synthetic ester, wherein the base stock has an oxygen, nitrogen or halogen content of at least 15 wt.%, based on the total weight of the base stock; and a lubricant additive package.
Abstract:
Die Erfindung betrifft ein im wesentlichen verdickerfreies Schmierfett, das aus Perfluorpolyethern (PFPE) und einem kleinen Anteil einer pyrogenen Kieselsäure, sowie üblichen Additiven besteht.
Abstract:
A magnetic recording medium (10) which comprises a nonmagnetic substrate (1), a magnetic layer (2), a protective layer (3), a back coating layer (4), and lubricant layers (6a, 6b), wherein the lubricant layer (6a) formed on the back coating layer comprises a lubricant comprising at least one compound selected among fluorinated carboxylic acids and at least one compound selected among fluorinated monoesters and fluorinated polyether compounds.
Abstract:
A surface treatment composition of fluorocarbon-oil-in-hydrocarbon-oil type with an excellent long-term stability, prepared by emulsifying a liquid fluorocarbon oil and a liquid hydrocarbon oil by using a polymeric surfactant having a fluorocarbon segment and a hydrocarbon segment in its molecule.
Abstract:
The present invention provides a novel lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37 DEG C., and a viscosity index of at least 20. The composition is miscible in combination with tetrafluoroethane in the range between -40 DEG C. and at least +20 DEG C. The novel lubricating composition is particularly useful with tetrafluoroethane in refrigeration and air-conditioning applications. As such, the present invention also provides a composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of fluorinated alkyl group on at least one end thereof. The lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37 DEG C., and a viscosity index of at least 20. The lubricant is miscible in combination with the tetrafluoroethane in the range between about -40 DEG C. and at least about +20 DEG C.