Detectable refrigerant compositions and uses thereof

US7779668B2 · kind B2 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Thomas J. Leck · Hockessin, US
• Mack McFarland · New Garden Township, US
• Barbara Haviland Minor · Elkton, US
• John Carl Steichen · Landenberg, US

Key dates

• Filing date: Mar 30, 2009
• Grant date: Aug 24, 2010
• Expiry date: Mar 30, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M3/228
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein are detectable refrigerant compositions, comprising from about 0.001 to about 5 weight percent tracer compositions, which are useful to identify leaking in a vapor compression refrigeration and/or air conditioning system. The presence of the tracers make the refrigerant compositions detectable by chemo/electro-active array, corona discharge, heated diode, electrochemical, photoionization, infrared, ultrasonic and electron capture detectors.