Patent ID: 9435574
Filing Date: 2016-09-06
CPC Classification: B60H,C09K,C10M,C10N,F25B

Claim Text:
1. A method of maintaining an air conditioning or refrigeration system charged and pressurized with a system fluid comprising a refrigerant, the method comprising: a) introducing into the system fluid, a maintenance fluid containing a hydrolytic drying agent which maintains a fluid form upon hydrolytic reaction with water, and having a maintenance fluid viscosity; and b) causing the system to distribute said maintenance fluid throughout the system fluid, wherein the hydrolytic drying agent is an orthoester, and the orthoester is selected from the group consisting of trimethylorthoformate, trimethylorthoacetate, triethylorthoformate, triethylorthoacetate, triisopropylorthoformate, triisopropylorthoacetate, and triethylorthobenzoate.