Hard polyurethane foam, and refrigerator utilizing said foam

Application Number  00128192 Application Date  2000.10.27
Publication Number  1298789 Publication Date  2001.06.13
Priority Information   1999/10/29 JP 308505/1999  
Applicant(s) Name  Hitachi Co., ltd.  
Inventor(s) Name  Yokukura Hisao;Ito Yutaka;Kanno Seigi  
Patent Agency Code  11038 Patent Agent  huang shuhui
AbstractThe object of the invention is to obtain a rigid polyurethane foam reduced in amount of blistering and to provide a refrigerator prevented from deformation when filling a heat insulating material without installing a reinforcing member by using the rigid polyurethane foam. A first polyol component prepared by adding an alkylene oxide to m-tolylenediamine and a second polyol component obtained by adding an alkylene oxide to o-tolylenediamine are essential in a polyol and the content of the first polyol component is not lower than that of the second polyol component.