| 摘要 |
PURPOSE:To obtain a heat-insulating box in which the inner box is firmly bonded to the heat-insulating material made by using HCFC 123 or HCFC 141b as the blowing agent, the inner box does not discolor during molding, and the inner box does not suffer from cracking due to the above blowing agent by using a specified resin composition as the material for the constituent inner resin box. CONSTITUTION:This box is one composed of an inner resin box, an outer metallic box and an integrally expanded urethane placed between the boxes, wherein the inner resin box is made from a composition obtained by mixing a graft copolymer obtained by polymerizing a monomer mixture comprising 35-52wt.% vinyl cyanide compound and 48-65wt.% aromatic vinyl compound in the presence of a conjugated diene synthetic rubber with a copolymer comprising 35-52wt.% vinyl cyanide compound and 48-65wt.% aromatic vinyl compound, a poly-n-butyl acrylate coated with a copolymer comprising 35-52wt.% vinyl cyanide compound and 48-65wt.% aromatic vinyl compound and an aromatic vinyl oligomer. |
