| abstract |
A heat insulating box, such as a refrigerator box, comprises a heat insulator and a box member that is in contact with the heat insulator. The heat insulator is formed of a urethane foam using either HCFC-123 (CHCl2CF3) or HCFC-141b (CH3CCl2F) or both as a forming agent, and the box member is formed of an acrylonitrile/ethylene- PROPORTIONAL -olefinic rubbery polymer/styrene resin (A/epdm/S resin), an acrylonitrile/alkyl acrylate ester rubbery polymer/styrene resin (ASA resin), a mixture of an A/epdm/s resin and an ASA resin, or a mixture of an ASA resin with an acrylonitrile/butadiene/styrene resin. |