초록 ▼

A cold pack 10 made in accordance with the principles of the present invention includes a container 18. Disposed within the container 18 is a first endotherm-producing chemical 15. Also disposed within the container 18 is a solvent packet 13 and a chemical packet 11. Second endotherm-producing chemi

A cold pack 10 made in accordance with the principles of the present invention includes a container 18. Disposed within the container 18 is a first endotherm-producing chemical 15. Also disposed within the container 18 is a solvent packet 13 and a chemical packet 11. Second endotherm-producing chemical 43 is disposed in the chemical packet 11. First endotherm-producing chemical 15, the solvent packet 13 and the chemical packet 11 are collectively components of the cold pack. Preferably the container 18 is sealed so as to surround and encase the components of the cold pack 10. The first endotherm-producing chemical 15 and the second endotherm-producing chemical 43 are selected to be different. Both the first endotherm-producing chemical 15 and the second endotherm-producing chemical 43 may be selected from among those compounds with a positive enthalpy of solution (.DELTA..sub.sol /H.degree., kJ/mol) and which produce a reduced temperature of solution that is greater than 10.degree. F. and provide the cold pack 10 with an extended life.

대표청구항 ▼

[ What is claimed is:] [1.]1. A composition for an extended life cold pack comprising:a first endotherm-producing chemical;a solvent;a second endotherm-producing chemical wherein the second endotherm-producing chemical is different from the first endotherm-producing chemical;and wherein said first e

[ What is claimed is:] [1.]1. A composition for an extended life cold pack comprising:a first endotherm-producing chemical;a solvent;a second endotherm-producing chemical wherein the second endotherm-producing chemical is different from the first endotherm-producing chemical;and wherein said first endotherm-producing chemical and second endotherm-producing chemical are selected from the group consisting of ammonium nitrate, ammonium sulfamate, ammonium nitrite, ammonium iodide, ammonium bromide, sodium chloride, sodium nitrate, sodium nitrite, sodium carbonate, sodiumbicarbonate, potassium nitrate, potassium nitrite, urea, methylurea, and combinations thereof;such that the combination of the first endotherm-producing chemical, second endotherm-producing chemical, and the solvent produces a temperature in the combination that is equal to or greater than 10.degree. F. and the cold pack is provided with an extended life.