Fluorescent tracer dyes
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United States of America Patent
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Nov 21, 2000
Grant Date -
N/A
app pub date -
Mar 4, 1999
filing date -
Mar 4, 1999
priority date (Note) -
Expired
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Abstract
A dye composition has the formula: ##STR1## where R.sup.1 and R.sup.2 are the same or different and are selected from (A) C.sub.2 -C.sub.12 alkyloxyalkyl, and (B) C.sub.9-12 alkyl, (A) comprising from about 30 to 80 mole % of the R groups, (B) comprising 20 to about 70 mole % of the R groups. The dye composition is useful as a fluorescent tracer in refrigerant lubricants of the polyol ester types used in non-Freon refrigerants.
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