To provide a producing method of a foam by which the foam of a metal or a metallic compound having uniform foam cells can be produced with a very simple process without necessitating any complicated process such as a plating process and a metallic powder attaching process.
A resin composition consisting of a heat resistant resin of granular or fibrous shape containing dihydrobenzooxazine rings, a granular foaming agent and a metal or a metallic compound is processed to a molded body and, then, the molded body is heated to cause ring-opening polymerization of the dihydrobenzooxazine rings of the heat resistant resin and decomposition of the foaming agent to obtain a molded foam. The molded foam is heated in the atmosphere to fire the resin part and a complex foam is obtained. The complex foam is sintered in a reductive atmosphere to obtain a foam of the metal or the metallic compound. The resin composition in which the size of the heat resistant resin containing the dihydrobenzooxazine rings is half to ten times of the foaming agent is used.
AIZAWA TERUKI
UCHIDA TATSUYA
