Abstract:
The present invention discloses an oil comprising at least one alkyl aromatic compound wherein the oil viscosity is lower than 3.0 cSt at the temperature of 40 °C. The oil of the present invention shows a lower viscosity variation as a function of the temperature, what contributes to reduce the cooling system equipment wear and increase the equipment operation lifetime, for example, the operation lifetime of the cooling compressors. It also an object of the present invention a composition comprising said oil in combination with at least one fluid of the hydrocarbon (HC) type and its uses in mechanical equipments and mechanical equipments made with said oil and/or composition.
Abstract:
Polyol ester lubricant compositions comprising predominately straight chain C5-10 alkylcarboxlate esters of neopentyl alcohols, for example, straight chain C5-10 alkylcarboxlate esters of one or more of trimethylol propane, pentaerythritol, di- pentaerythritol, tri-pentaerythritol or pentaerythritol oligomers, and working fluids comprising said lubricant compositions and a hydrocarbon refrigerant, suitable for heat transfer devices including refrigeration and air conditioning systems are provided. The polyol ester lubricant compositions have a kinematic viscosity at 40 °C of 22-125 cSt and a viscosity index of greater than 140, and are characterized by having very high lubricity, excellent load carrying properties and excellent low temperature properties.
Abstract:
The disclosed lubricant compositions comprise a mixture of from about 1 - 99% by weight of the mixture of one or more ester compounds and from about 1- 99% by weight of the mixture one or more second ester compounds wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 11 , and R 12 are each H or methyl; a+x, b+y. and c+z are integers of 1 to about 20, and m+n is an integer of 1 to about 10; and R 7 , R 8 , R 9 , R 10 and R 13 are straight-chain and branched, substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, alkylaryl, arylalkyl, alkylcycloalkyl, cycloalkylalkyl, arylcycloalkyl, cycloalkylaryl, alkylcycloalkylaryl, alkylarylcycloalkyl, arylcycloalkylalkyl, arylalkylcycloalkyl, cycloalkylalkylaryl, or cycloalkylarylalkyl groups having 1 to about 17 carbons. The lubricant composition may be combined with a refrigerant to form a refrigerant-lubricant composition that may be used as a working fluid in a heat transfer apparatus.
Abstract:
Provided herein are compositions comprising at least one estolide compound of formula (I): in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 1; R 1 , independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R 2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R 3 and R 4 , independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are uses of the compositions described herein.
Abstract translation:本文提供了包含至少一种式(I)的内酯化合物:其中n为等于或大于0的整数的组合物; m是等于或大于1的整数; 独立地,R 1独立地选自任选取代的饱和或不饱和的,支链或非支链的烷基; R2选自氢和任选取代的饱和或不饱和的烷基,并且是支链或非支链的; R 3和R 4各自独立地选自任选取代的饱和或不饱和的,分支或非支链的烷基。 还提供了本文所述的组合物的用途。
Abstract:
Die Erfindung betrifft ein Verfahren zum Betrieb eines Dampfkreisprozesses, der in einer erfindungsgemäßen Vorrichtung ausgeführt wird, die einen Verdampfer (1) oder Dampferzeuger zur Verdampfung eines flüssigen Arbeitsmediums (A) und einen mittels eines Schmiermittels geschmierten Expander (5) zur Verrichtung mechanischer Arbeit aufweist, wobei das Verfahren folgende Verfahrensschritte aufweist: a) das flüssige Arbeitsmedium (A) wird dem Verdampfer (1) zugeführt, in welchem es verdampft und dampfförmig dem Expander (5) zugeführt wird; b) dem Expander (5) wird weiter als Schmiermittel eine ionische Flüssigkeit (B) zugeführt, die mit dem flüssigen Arbeitsmedium (A) bei Raumtemperatur zwei flüssige Phasen bildet; und c) die das Schmiermittel für den Expander (5) bildende ionische Flüssigkeit wird vor dem Verdampfer (1) von dem Arbeitsmedium (A) abgetrennt.
Abstract:
A refrigerant compressor includes a hermetic container storing refrigerant oil an electrically-driven element and a compressing element driven by the electrically-driven element. The compressing element includes a cylinder block having a cylindrical compression chamber and a cylindrical piston reciprocating in the compression chamber. The compression chamber and the piston have a diameter difference in the range of not shorter than 4 micrometers to not longer than 15 micrometers. The refrigerant oil has viscosity of 8 mm 2 /s or less at 40 degrees Celsius and is prepared by mixing a first refrigerant oil having viscosity of less than 8 mm 2 /s at 40 degrees Celsius with a second refrigerant oil having viscosity of 20 mm 2 /s or more at 40 degrees Celsius.
Abstract:
A refrigerating machine oil composition which comprises a base oil comprising a mineral oil and/or a synthetic oil and, compounded therewith, (a) a partial ester of a polyhydric alcohol with a fatty acid and (b) an acid phosphoric ester or an amine salt thereof; and a refrigerating machine oil composition which comprises a base oil comprising a mineral oil and/or a synthetic oil and, compounded therewith, (a) an acid phosphoric ester or an amine salt thereof, (b) an alkylene oxide adduct of an acetylenic glycol, (c) the potassium salt of a fatty acid, etc., (d) an organic acid, and (e) a fatty acide amide, etc. The compositions have excellent lubricating performace and produce a satisfactory friction-reducing effect in either an oily region or an extreme pressure region, especially in friction between an aluminum material and an iron material.