Compositions and methods for injection of sealants and/or drying agents into air conditioning and refrigeration systems

A device for use in maintaining an air conditioning or refrigeration system, the device comprising:

• a) a sealed vessel adapted to receive a hose assembly forming, at a proximal end, a sealed fluid connection to a refrigerant fluid of the system, and having at a distal end, a receiving unit for the vessel;
• and
• b) in the sealed vessel:
• (i) a fluid containing a hydrolytic drying agent which maintains a fluid form upon reaction with water, and (ii) a sealant,
• 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.

A device for use in maintaining an air conditioning or refrigeration system, the device comprising:

• a) a sealed vessel adapted to receive a hose assembly forming, at a proximal end, a sealed fluid connection to a refrigerant fluid of the system, and having at a distal end, a receiving unit for the vessel;
• and
• b) in the sealed vessel:
• a fluid containing a hydrolytic drying agent which maintains a fluid form upon reaction with water,
• 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.