초록 ▼

This invention is a portable heat source that may be used to warm food, beverage or other supplies. The heater material is a solid that may be stored for long periods of time, and activated by addition of water or an aqueous solution. The heater consists of an acidic anhydride or salt together with

This invention is a portable heat source that may be used to warm food, beverage or other supplies. The heater material is a solid that may be stored for long periods of time, and activated by addition of water or an aqueous solution. The heater consists of an acidic anhydride or salt together with a basic anhydride or salt, such that addition of water to both acidic and basic anhydrides produces heat as well as acid and base respectively; subsequent reaction of the acid and base produces additional heat, as well as a safe, neutral product that is easily disposed. The invention further consists of means to regulate the rate of heat production by the use of additives and processing methods, so that heat is produced at a rate compatible with the rate at which the food or other materials can absorb the heat. The invention further consists of devices incorporating the materials to be heated in an advantageous arrangement with the heater composition.

대표청구항 ▼

[ We claim:] [5.] A water-free heat-producing composition consisting essentially of phosphorous pentoxide, calcium oxide, and an inert material selected from the group consisting of a surfactant, an oil, a wax, a polymeric solid or mixtures thereof wherein the inert material does not react with phos

[ We claim:] [5.] A water-free heat-producing composition consisting essentially of phosphorous pentoxide, calcium oxide, and an inert material selected from the group consisting of a surfactant, an oil, a wax, a polymeric solid or mixtures thereof wherein the inert material does not react with phosphorous pentoxide or calcium oxide to produce heat.