Heat insulator made of shape memory polymer foam

Details Heat insulator made of shape memory polymer foam Heat insulator made of shape memory polymer foam

C - Chemistry, Metallurgy

08

J

403/14, 403/9

C08J 9/00 (2006.01) B29C 44/56 (2006.01) C08G 18/10 (2006.01)

Patent

CA 2001165

A heat insulator made of shape memory polymer foam which has good moldability and changes greatly in elastic modulus above and below its glass transition point, and a heat insulator as mentioned above in which the polymer foam is polyurethane produced by prepolymer process from a composition containing a blowing agent, said composition being composed of a difunctional diisocyanate, a difunc- tional polyol, and a difunctional chain extender contain- ing active hydrogen in a molar ratio of 2.00-1.10 : 1.00 : 1.00-0.10, said polyurethane containing approximately equal amounts of NCO groups and OH groups at the terminals of the molecular chains and having a glass transition point of -50 to 60°C and a crystallinity of 3 to 50 wt%.

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