Refrigerants colored for leak indication with substituted anthra

Details Refrigerants colored for leak indication with substituted anthra Refrigerants colored for leak indication with substituted anthra

1977-10-06

1979-10-09

Pitlick, Harris A.

Compositions

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

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

260379, C09K 504

Patent

active

041705645

ABSTRACT:
Refrigerants, refrigeration oils and refrigerant-refrigeration oil mixtures containing a substantially hydrophobic polyoxypropyleneamine substituted anthraquinone dyes having the structure ##STR1## wherein R is an alkylene moiety containing at least 1 carbon atom, R' is a member of the group consisting of NH.sub.2, OH, NCOR", OCOR" and OR" wherein R" is an alkyl moiety containing from 1 to about 18 carbon atoms, and wherein n is an integer having an average of at least about 6.

REFERENCES:
patent: 2383236 (1945-08-01), Buckley et al.
patent: 3449319 (1969-06-01), Kuhn
patent: 3770640 (1973-11-01), Bartlett
patent: 4137243 (1979-01-01), Farmer

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