Compositions – Vaporization – or expansion – refrigeration or heat or energy... – With lubricants – or warning – stabilizing or anti-corrosion...
Reexamination Certificate
2007-04-24
2007-04-24
Hardee, John R. (Department: 1751)
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
With lubricants, or warning, stabilizing or anti-corrosion...
Reexamination Certificate
active
10495887
ABSTRACT:
The present invention relates to a lubricating basestock for the blends of hydrofluorocarbon and optionally hydrochlorofluorocarbon refrigerants comprising a blend of (A) at least one alkylbenzene and (B) at least one polyol ester. While alkylbenzenes are not miscible with the refrigerant blend at the desired operating temperature and pressure of refrigeration or air-conditioning systems, the addition of low concentration of polyol ester is found to greatly improve the miscibility of the alkylbenzene and polyol ester blend. An important criteria of the invention is that the lubricant blend of polyol ester and alkylbenzene are sufficiently miscible with the hydrofluorocarbon refrigerant blend both as a liquid and a gaseous refrigerant over the operational temperatures of the compression refrigeration system.
REFERENCES:
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patent: 6251300 (2001-06-01), Takigawa et al.
patent: 556662 (1993-08-01), None
patent: 699742 (1996-03-01), None
patent: 1085077 (2001-03-01), None
patent: WO 02/070637 (2002-09-01), None
Derwent Abstract Accession No. 1993-200714/199325 (Japanese Patent No. 5125374A, Sanyo Electric Co.).
Derwent Abstract Accession No. 1997-347719/199732 (Japanese Patent No. 9143486A, Matsushita Denki Sangyo KK).
Search Report from counterpart PCT Publication WO 03/044137 A3 published Aug. 7, 2003.
Li Hsinheng
Lilje Kenneth C.
Esposito Michael F.
Hardee John R.
Laferty Samuel B.
The Lubrizol Corporation
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