초록 ▼

A heat insulating body comprising a rigid polyurethane foam of open cell structure, and a vessel formed of metal-plastics laminate film enveloping said rigid polyurethane foam, the whole system being evacuated to reduce the internal pressure and then hermetically sealed; and an adiabatic box compris

A heat insulating body comprising a rigid polyurethane foam of open cell structure, and a vessel formed of metal-plastics laminate film enveloping said rigid polyurethane foam, the whole system being evacuated to reduce the internal pressure and then hermetically sealed; and an adiabatic box comprising said heat insulating body, an inner box and an outer box, said heat insulating body being disposed between said inner box and said outer box and the whole system being subjected to integral foaming with rigid polyurethane foam.

대표청구항 ▼

A heat insulating body comprising a rigid polyurethane foam of open cell structure formed by foaming a mixture comprising an organic polyisocyanate, a polyol, a catalyst, a foam stabilizer, a blowing agent, and as a cell-interconnecting agent, 0.1 to 5.0 parts by weight of a powdery divalent metal s

A heat insulating body comprising a rigid polyurethane foam of open cell structure formed by foaming a mixture comprising an organic polyisocyanate, a polyol, a catalyst, a foam stabilizer, a blowing agent, and as a cell-interconnecting agent, 0.1 to 5.0 parts by weight of a powdery divalent metal salt of a saturated monocarboxylic acid, the organic polyisocyanate used in forming the rigid polyurethane foam being a purified diphenylmethane diisocyante, a modified product of purified diphenylmethane diisocyanate, and a prepolymerized purified tolylene diisocyanate obtained by the preliminary reaction of purified tolylene diisocyanate and polyol, used each alone or as a mixture thereof, and has an amine equivalent of 120 to 180, and the polyol used in forming the rigid polyurethane foam being a polyol containing 70% by weight or more of a polyether polyol having a hydroxyl value of 300 to 550 mg KOH/g obtained by the addition polymerization of an alkylene oxide to an aromatic diamine, and a vessel formed of metal-plastics laminate film enveloping said rigid polyurethane foam, the whole system being evaucated to reduce the internal pressure and then hermetically sealed.