Patent ID: 6379581
Filing Date: 2002-04-30
Classification: C10M,C10N

Abstract:
A composition for use in a refrigerator as a lubricating refrigerant which has extreme high-pressure lubricating capacity, said composition comprising in admixture a chlorine-free fluorocarbon refrigerant whose molecules do not contain chlorine, a synthetic oil which does not contain chlorine and which has a kinematic viscosity of 2 to 50 cst at 100Â° C., and 0.1 to 10 wt % based on the total weight of said synthetic oil of at least one molybdenumoxysulfide compound selected from the group consisting of molybdenumoxysulfide diorganophosphorodithioate given by the following formula (1):{(RO)2PS2}2Mo2SXOYâ€ƒâ€ƒ(1) in which R represents a hydrocarbon group having 3 through 20 carbon atoms, and X and Y are each a number which meet the conditions of 0&lE;X&lE;4, 0&lE;Y&lE;4 and X+Y=4, molybdenumoxysulfide diorganodithiocarbamate given by the following formula (2)(Râ€²2NCS2)2Mo2SXâ€²OYâ€²â€ƒâ€ƒ(2) in which Râ€² is a hydrocarbon group having 3 through 20 carbon atoms and Xâ€² and Yâ€² are each a number which meet the conditions of 0&lE;Xâ€²&lE;4, 0&lE;Yâ€²&lE;4 and Xâ€²=4, and mixtures thereof, said molybdenumoxysulfide compound being soluble in said synthetic oil, and said synthetic oil being soluble with said refrigerant when said refrigerant is in a liquid state at a temperature ranging from âˆ’30 to 50Â° C.