Compositions – Vaporization – or expansion – refrigeration or heat or energy... – With lubricants – or warning – stabilizing or anti-corrosion...
Patent
1989-12-21
1995-01-03
Skane, Christine
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
With lubricants, or warning, stabilizing or anti-corrosion...
252 496, 252 58, 252 67, 252 783, C09K 504, C10M10576, C10M10550
Patent
active
053783859
ABSTRACT:
The present invention provides a composition for use in compression refrigeration and air-conditioning. The composition comprises: (a) a refrigerant selected from the group consisting of hydrofluorocarbon and hydrochlorofluorocarbon; and (b) a sufficient amount to provide lubrication of at least one fluorinated silicone. The fluorinated silicone has units therein selected from the group consisting of fluoroalkyl and alkyl. If both fluoroalkyl and alkyl units are present in the fluorinated silicone, at least 25% of the units are fluoroalkyl. The fluorinated silicone has a molecular weight between about 280 and about 6,000; a viscosity of about 10 to about 300 centistokes at 38.degree. C. (0.1 to 3 cm.sup.2 /sec), and is miscible in combination with the refrigerant in the range between -40.degree. C. and at least +20.degree. C.
REFERENCES:
patent: 4818423 (1989-04-01), Steinbach et al.
patent: 4851144 (1989-07-01), McGraw
patent: 4946611 (1990-08-01), Kaneko
A review of Synthetic Oils for Refrigeration Use, Sanvordenker et al, Ashrae Symposium, Jun. 1972.
Lubricants for Refrigeration Machines, Steinbach et al, German Unexamined Patent Application 2,750,980, May 1979.
Pelava John W.
Pham Hang
Thomas Raymond H. P.
Wilson David P.
Allied-Signal Inc.
Brown Melanie L.
Harding Karen A.
Skane Christine
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