| 摘要 |
<p>PURPOSE:A pyrogenic composition that is prepared by adding a metal oxide as an auxiliary reaction accelerator to a mixture of iron and a water-soluble salt from organic base and inorganic acid, thus being suitably used for disposable body warmers because it generates heat rapidly by reaction with water and oxygen to maintain high temperaures for many hours. CONSTITUTION:(A) Powdery or particulate iron and (B) a water-soluble selt from organic base and inorganic acid such as methylamine hydrochloride as a reaction accelerator are used as the effective components and they are combined with (C) a metal oxide, preferably oxide of copper or manganese, as an auxiliary reaction accelerator. The proportion of these components A through C is 100: more than 1:0.5-10 by weight preferably. The amount of water retention agent such as ash or activated carbon for holding water is preferably 10-100pts. 100pts. of component A by weight. Air is employed as an oxygen source. EFFECT:The heat generation is sustained for long hours even when the amount of the metal oxide as an auxiliary reaction accelerator is reduced.</p> |
