摘要:
(Object) To provide an ester for a refrigerator oil capable of excellent compatibility with a refrigerant in the case that it is used with a non-chlorine-based refrigerant. (Solution) An ester for a refrigerator oil is composed of a ester reaction product of a component (A), component (B) and component (C). 0.02 to 0.4 mol of a constituent component derived from the component (B) and 3.2 to 3.96 mol of a constituent component derived from the component (C) are contained with respect to 1.0 mol of a constituent component derived from the component (A), and the formula (1) is satisfied. (A) pentaerythritol (B) a linear divalent carboxylic acid having 4 to 10 carbon atoms (C) a monovalent carboxylic acid having 4 to 10 carbon atoms α ≦ peak group a / peak group b ≦ β α = − 10 × a molar number of a constituent component derived from the component B + 6.5 β = − 10 × the molar number of the constituent component derived from the component B + 7.5 (The peak group (a) is a total of an area of a peak observed in a retention time in 28 to 40 minutes obtained by a gas chromatography, and the peak group (b) is a total of an area of a peak observed in a retention time of 40 to 60 minutes obtained by the gas chromatography described above).
摘要:
An ester for a refrigerator oil is obtained from the following components (A), (B), (C) and (D). The ester contains a unit derived from the component (B) in a ratio of 0.1 to 0.4 mole, a unit derived from the component (C) in a ratio of 0.8 to 2.8 mole and a unit derived from the component (D) in a ratio of 0.3 to 2,3 mole with respect to 1.0 mole of a unit derived from said component (A). The ester has a hydroxyl value of 5 to 40 mgKOH/g and satisfies the formulas (1) and (2). (A) neopentyl glycol; (B) a linear dihydric alcohol having 2 to 6 carbon atoms including carbons at both terminals and hydroxyl groups connected to the carbons at both terminals, respectively; (C) a linear dicarboxylic acid having 4 to 10 carbon atoms including carbons at both terminals and carboxyl groups connected to the carbons at both terminals, respectively; (D) a monohydric alcohol having 6 to 12 carbon atoms; 0.08 ≦ B OH/ (A OH +B OH )≦ 0.15 ···(1); [B OH /(A OH +B OH )] /[B mol /(A mol +B mol )] ≦ 0.9 ... (2); (A OH represents a molar number of terminal hydroxyl groups derived from the component (A); B OH represents a molar number of terminal hydroxyl groups derived from the component (B); A mol represents a molar number of the unit derived from said component (A); and B mol represents a molar number of the unit derived from the component (B))]
摘要:
A composition for a heat cycle system contains a working medium for heat cycle containing 1-chloro-2,3,3,3-tetrafluoropropene and a refrigerant oil.
摘要:
Methods for improving bearing performance in compressors, especially for those that use high energy refrigerants or that have a high-side design, are provided. The compressor comprises a bearing that is substantially free of lead. The bearing comprises copper and at least one lubricant particle type selected from a group consisting of: molybdenum disulfide (MoS2), calcium fluoride (CaF2), tungsten disulfide (WS2), zinc sulfide (ZnS), hexagonal boron nitride, polytetrafluoroethylene (PTFE), carbon fiber, graphite, graphene, carbon nanotubes, carbon particles, thermoset polyimide, and combinations thereof. The compressor processes a high energy refrigerant and a lubricant oil comprising a sulfur-based additive. The sulfur-based additive reacts with the copper in the bearing to enhance lubricity and improve performance of the bearing in the compressor machine. Compressors having such features and improved bearing performance are also contemplated.
摘要:
To provide a composition for a heat cycle system having favorable lubricating properties and comprising a working fluid for heat cycle which has a low global warming potential and which can replace R410A and a heat cycle system employing the composition. A composition for a heat cycle system comprising a working fluid for heat cycle containing 1,2-difluoroethylene, and a refrigerant oil such as an oxygen-containing synthetic oil (such as an ester refrigerant oil or an ether refrigerant oil) or a hydrocarbon refrigerant oil, and a heat cycle system employing the composition for a heat cycle system.