The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
Nov. 13, 2002
Hsinheng LI, Midland, MI (US);
Kenneth C. Lilje, Midland, MI (US);
Hsinheng Li, Midland, MI (US);
Kenneth C. Lilje, Midland, MI (US);
The Lubrizol Corporation, Wickliffe, OH (US);
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.