摘要:
A lubricant/working fluid composition for use in mechanical vapor compression type heat transfer devices is described wherein the working fluid is preferably tetrafluoroethane and the lubricant is an ester which is miscible with the working fluid at 10% over a temperature range of -50.degree. C. to +80.degree. C. and has a viscosity of 5 to 100 cSt at 40.degree. C. Useful esters include pentaerythritol partial ester of straight chain C.sub.5 or branched chain C.sub.7 carboxylic acids. The esters are compatible with non-chlorine containing working fluids and exhibit a low level of corrosion.
摘要:
Antiwear additives for refrigerant lubricant compositions and refrigerant lubricant compositions containing said antiwear additives are disclosed for use in compression refrigeration applications.
摘要:
This invention relates to a composition comprising:(A) a major amount of a fluorine-containing hydrocarbon containing one or two carbon atoms; and(B) a minor amount of at least one soluble boron-containing composition prepared by reacting a boron source with a monohydroxy alcohol, an alkylene glycol, a polyoxyalkylene glycol, hydrocarbyloxyalkylene glycol, a hydrocarbylcarbonyl polyoxyalkylene glycol, a hydroxy amine, or mixtures of two or more thereof, provided that the boron-containing composition is substantially free of hydroxyl groups.The present invention provides compositions which are useful in refrigerators or air conditioners including auto, home and industrial air conditioners. The invention provides boron-containing compositions which are compatible with fluorine-containing hydrocarbons used in refrigerators and air conditioners.
摘要:
There is disclosed a lubricating oil composition for a Flon atomsphere which comprises 100 parts by weight of a base oil having a kinematic viscosity at 40.degree. C. of 5 to 500 cSt and 0.0001 to 1 part by weight of a polysiloxane having an epoxy structure and a kinematic viscosity at 25.degree. C. of 1000 cSt or higher.This lubricating oil composition has excellent high temperature stability and anti-foaming properties in the presence of various coolants such as Flon, etc., and can be effectively utilized as a refrigerator oil, a heat pump oil, etc.
摘要:
A refrigeration fluid compositions for compression refrigeration which have an upper solution critical temperature equal to or greater than 60.degree. C. are composed of (A) selected hydrochlorofluorocarbons and hydrofluorocarbons and (B) polyether polyols having viscosities of greater than 80 centistokes at 38.degree. C. and having a number average molecular weight from about 400 to about 2000 wherein the polyols are the residue of an active hydrogen compound such as glycerine or ethylene diamine.
摘要:
Esters and mixtures of esters of polyhydric alcohols, e.g., of pentaerythritol, in which at least 22 number percent of the acyl groups in the esters are either branched or contain no more than six carbon atoms, are effective lubricants and/or lubricant base stocks for chlorine-free fluorocarbon refrigerant heat transfer fluids, particularly for chlorine-free heat transfer fluids such as Refrigerant 134a (1,1,1,2-tetrafluoroethane).
摘要:
Refrigeration fluid compositions for compression refrigeration which have an upper solution critical temperature equal to or greater than about 35.degree. C. are composed of selected hydrochlorofluorocarbons and hydrofluorocarbons with esterified polyether polyols in which at least 30% of the hydroxyls are esterified. The esterified polyether polyols have a viscosity between 25 and 150 centistokes at 38.degree. C.
摘要:
Dewaxed oils can have their low temperature performance improved by the removal of residual wax by adsorption of said residual wax onto a hydrophobic molecular sieve. The wax-laden hydrophobic molecular sieve is regenerated by use of dewaxing solvents, such as ketones.The dewaxed oils, which have residual wax removed by the present invention, are oils which have been dewaxed by means of solvent dewaxing procedures or by catalytic dewaxing processes. These oils, produced by the combination of conventional-adsorptive trim dewaxing, exhibit superior formulated oils low temperature performance as compared to formulated oils made from oils dewaxed to the same pour point solely by conventional dewaxing by either solvent or catalytic processes practiced under severe conditions (deep dewaxing).
摘要:
A refrigerator oil which comprises at least one of the fluorinated compounds represented by the following general formula: ##STR1## (all the symbols are as defined in the appended claims). The refrigerator oil is effectively used as a lubricant for refrigerators, coolers, (particularly car air-conditioners), and heat pumps which use various Flon compounds as refrigerants.
摘要:
Fluorosiloxane lubricant comprising compounds corresponding to the formulaT.sub.a M.sub.b D.sup.F.sub.c D.sub.dwhereinT denotes alkyltrisiloxy having 1 to 12 alkyl carbon atoms,M denotes trialkylmonosiloxy having 1 to 12 carbon atoms in each alkyl,D denotes dialkylsiloxy having 1 to 12 carbon atoms in each alkyl,D.sup.F denotes a substituted alkyldisiloxy having 1 to 12 carbon atoms in the alkyl and substituted by a fluorinated moiety of the formula C.sub.n F.sub.2n+1 --CH.sub.2 --CH.sub.2,whereinn is a number from 2 to 10,a is a number from 1 to 5,b is a number from 3 to 7,c is a number from 3 to 7, andd is a number from 30 to 70.
摘要翻译:含有对应于式TaMbDFcDd的化合物的氟硅氧烷润滑剂,其中T表示具有1至12个烷基碳原子的烷基三甲氧基硅烷,M表示各烷基中具有1至12个碳原子的三烷基单甲硅烷氧基,D表示各烷基中具有1至12个碳原子的二烷基甲硅烷氧基,DF表示 在烷基中具有1至12个碳原子并被式C n F 2n + 1-CH 2 -CH 2的氟化部分取代的取代的烷基二甲氧基硅烷,其中n为2至10的数,a为1至5的数,b为 3为7,c为3〜7的数,d为30〜70的数。