Lubricating compositions comprising fluoroalkane refrigerant, an ester and/or polyglycol oil, and an inorganic boron compound
AssigneeNippon Oil Co., Ltd.
InventorsUmekichi Sasaki, Motoshi Sunami, Hiroshi Hasegawa
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Abstract
A refrigerator oil composition for a fluoroalkane refrigerant, which comprises a base oil composed principally of an oxygen-containing compound and, based on the total weight of the composition, 0.005-5.0 wt. % of a boron compound as an essential component.
Claims12
A fluid composition for a refrigerator, which comprises
- (A) 100 parts by weight of a fluoroalkane refrigerant selected from the group consisting of difluoromethane (HFC-32), trifluoromethane (HFC-23), pentafluoroethane (HFC-125), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,-trifluoroethane (HFC-143a) and 1,1,-difluoroethane (HFC-152a), and
- (B) 1-500 parts by weight of the refrigerator oil composition, which comprises
- (a) a base oil composed principally of an oxygen-containing compound selected from the group consisting of dibasic acid esters, polyol esters, complex esters, polyol carbonate esters, polyglycols and mixtures thereof,
- (b) 0,005-5.0 wt. %, based on the total weight of the refrigerator oil composition, of a boron compound selected from the group consisting of alkali metal borates, alkali earth metal borates, ammonium borates and mixtures thereof, and
- (c) 0.1-50 wt. %, based on the total weight of (b) and (c), of a solvent selected from the group consisting of monohydric alcohols, glycols, cellosolves and mixtures thereof.
A method for improving lubrication in a refrigerator using a fluoroalkane refrigerant selected from the group consisting of difluoromethane (HFC-32), trifluoromethane (HFC-23), pentafluoroethane (HFC-125), 1,1,2,2- tetrafluoroethane (HFC-134), 1,1,1,2 tetrafluoroethane (HFC-134a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,-trifluoroethane (HFC-143a) and 1,1, difluoroethane (HFC-152a), said method comprising using in said refrigerator a refrigerator oil composition, which comprises
- (a) a base oil composed principally of an oxygen-containing compound selected from the group consisting of dibasec acid esters, polyol esters, complex esters, polyol carbonate-esters, polyglycols and mixtures thereof,
- (b) 0.005-5.0 wt. %, based on the total weight of the refrigerator oil composition, of a boron compound selected from the group consisting of alkali metal borates, alkali earth metal borates, ammonium borates and mixtures thereof, and
- (c) 1.0-50 wt. %, based on the total weight of (b) and (c), of a solvent selected from the group consisting of monohydric alcohols, glycols, cellosolves and mixtures thereof.
Dependencies are inferred from the claim text.