| abstract |
(57) [Summary] [Problem] It is easy to adjust and form a material, and flexibility, cushioning, vibration damping, sound insulation, heat insulation, and the like at normal and low temperatures. Provided is a thermoplastic resin foam having a high gas barrier property, no exudation of a plasticizer, and excellent weather resistance and thermal stability. A thermoplastic resin composition comprising an isobutylene-based block copolymer comprising a polymer block comprising isobutylene as a main component and a polymer block comprising a monomer component not comprising isobutylene as a main component, and a foaming agent is foamed. This is achieved by a thermoplastic resin foam obtained by the above method and a foamable thermoplastic resin composition therefor. |