Matsushita Refrigeration Company

Matsushita Electric Industrial Co., Ltd.

Tsukasa Takushima

Tomohisa Tenra

Hideo Nakamoto

Masaaki Suzuki

Yoshio Kishimoto

Kazutaka Uekado

Takashi Hashida

Takayoshi Ueno

Yoshiyuki Tsuda

Fumihiro Inagaki

Nobuo Sonoda

A thermal insulating foamed material is a polyurethane foam having closed cells, and produced by mixing, agitating and foaming a polyol, a polyisocyanate, a foam stabilizer, a catalyst, a blowing agent and a carbon dioxide adsorbent. The carbon dioxide adsorbent is produced by mixing and granulating powders of at least one member of alkali metal hydroxides and alkaline-earth metal hydroxides and organic or inorganic powders having a water absorbing property and soaked with water in advance, and formed by a resin film, such as a methacrylic acid ester, which is permeable to carbon dioxide but hardly permeable to water.

Thermal insulating foamed material having carbon dioxide adsorbents and

Thermal insulation foamed material having carbon dioxide absorbents and

Thermal insulating foamed material, method for producing the same, and

The present invention provides a thermal insulating foamed material with excellent thermal insulating properties and a method of manufacturing the same. The method comprises the steps of: concurrently mixing and blowing a polyurethane material to produce a foamed polyurethane resin composition with a multiplicity of closed cells, the polyurethane material including a reactive blowing agent, a volatile compound having a boiling point of not higher than 150.degree. C. and a molecular weight of not less than 70, an epoxy compound, and a carbon dioxide fixation catalyst, wherein the closed cells are filled with the volatile compound and carbon dioxide produced by a reaction of the reactive blowing agent with a polyisocyanate; and allowing the carbon dioxide to chemically react with epoxy groups of the epoxy compound in the presence of the carbon dioxide fixation catalyst to form a solid or liquid cyclic carbonate. The method gives a foamed material with the closed cells substantially filled with vapor of the volatile compound at a partial pressure of at least 5 mmHg at 25.degree. C.

Thermal insulating foamed material and method of manufacturing the same

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Higashiosaka, Japan

Tsukasa Takushima