Method and kit for testing polyolester lubricants used in refrig

Details Method and kit for testing polyolester lubricants used in refrig Method and kit for testing polyolester lubricants used in refrig

1996-02-07

1998-01-13

Warden, Jill

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

Acidity, basicity or neutralization number

436 22, 436 23, 436 60, 422 60, 422 61, 422 59, 422 74, 422 75, 62 84, 62125, 73 5305, G01N 3330

Patent

active

057078718

ABSTRACT:
Both a method and a kit for testing the fitness of a polyolester lubricant of the type used in a refrigerant compressor are provided. In the method of the invention, a solution for indicating an excess acidity of the polyolester lubricant is obtained by mixing a color acidity indicator, such as alizarin, with a sufficient amount of an alkaline to neutralize the inherent acidity of the lubricant. The resulting solution changes color only upon the presence of an excess acid condition associated with a compressor malfunction, such as burn out. Both the method and the kit are particularly well adapted to determine the fitness of polyolester lubricants of the type prepared by the reaction of trimethylolpropane with a mixture of a branched and a linear acid.

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