Refrigeration compositions having polyoxyalkylene glycols with a

Details Refrigeration compositions having polyoxyalkylene glycols with a Refrigeration compositions having polyoxyalkylene glycols with a

1992-07-28

1993-10-19

McAvoy, Ellen M.

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

With lubricants, or warning, stabilizing or anti-corrosion...

252 52A, 252 67, C09K 504

Patent

active

052542807

ABSTRACT:
The present invention is directed to polyoxyalkylene glycols which are used to flush currently used lubricants such as mineral oil, alkyl benzenes, and esters from a refrigeration system for conversion to fluorocarbon or hydrofluorocarbon refrigerants. The polyoxyalkylene glycol is selected from the group consisting of polyoxyalkylene glycol which is at least difunctional with respect to hydroxyl groups, polyoxyalkylene glycol having an alkyl cap on one end thereof, and polyoxyalkylene glycol having at least two alkyl caps. The polyoxyalkylene glycol has a molecular weight of about 300 to about 4,000, has a viscosity of about 5 to 150 centistokes at 37.degree. C., and is made from alkylene oxide having at least 4 carbon atoms.

REFERENCES:
patent: 5037570 (1991-08-01), Gorski et al.
patent: 5053155 (1991-10-01), Mahler
patent: 5100569 (1992-03-01), Nalewajek et al.
patent: 5154846 (1992-10-01), Thomas et al.

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