Takeda Chemical Industries, Inc.

Masanori Okamura

Michio Tanaka

Kohji Nasu

Hiroto Ryoshi

The heat insulator of this invention comprises a thermoformed open cell rigid polyurethane foam core enclosed in a gas barrier material and evacuated. The method of this invention comprises heating an open cell rigid polyurethane foam at a temperature not lower than the temperature at which its storage modulus of elasticity begins to decrease and enclosing the thus-thermoformed polyurethane foam in a gas barrier material and evacuating the interior of the enclosure. The heat insulator of the invention is highly heat-insulating and can be snugly applied to irregular surfaces.

Heat insulating material and method for producing same

A precoat metal, which has been prepared by coating a metal plate with a composition comprising (i) at least one member selected from the group consisting of (a) bis(isocyanatomethyl)cyclohexane and/or its adduct blocked with a blocking agent and (b) an isocyanate blocked with ethyleneimine and (ii) a polyol resin, and heating the thus coated metal plate to cure the coating material. Such film, when applied as a coating to a metal plate is completely free from yellowing and thermal degradation, and also exhibits increased hardness as well as a high flexural strength, staining resistance and chemical resistance. The precoat metal is advantageously utilized in construction materials, for example, roof decking and wall panels; and materials for light electrical appliances such as refrigerators and radios and TV, vending machine cabinets etc.

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Amagasaki, Japan

Masanori Okamura