Ester lubricants
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United States of America Patent
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Jul 23, 1996
Issued Date -
N/A
app pub date -
Aug 3, 1994
filing date -
Mar 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ester oil which lacks complete miscibility with fluorohydrocarbons has its miscibility with fluorohydrocarbons refrigerants improved by blending it with a second ester oil composed of molecules corresponding to the formula ROOC--CH.sub.2 CH.sub.2 -[(ROOC)CHCH.sub.2 ].sub.m --C(COOR).sub.2 --[CH.sub.2 CH(COOR)].sub.n --CH.sub.2 CH.sub.2 COOR wherein the R's represent alkyl groups of 1-30 carbons, at least 10% of which are alkyl groups of 1-4 carbons; and each of m and n represents zero or a positive integer such that the sum of m and n in a molecule is 0-30.
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