| abstract |
[Problem] Resin for closed-cell molded body that can produce closed-cell molded body in which uniform closed-cell molded body is formed by heating at the time of high-temperature molding without thermal expansion even when kneaded with molding resin at preliminary kneading temperature Provision of the composition. A closed cell molded resin composition comprising a thermally expandable microcapsule in a matrix resin, wherein the thermally expandable microcapsule comprises (I) (a) a nitrile radical polymerizable non-polymerizable resin. Copolymer of saturated monomer and carboxyl group-containing radically polymerizable unsaturated monomer, and (b) shell containing 1-3 valent metal cations ionically cross-linking the copolymer, and (II) volatile swelling agent A resin composition for closed-cell molded bodies, comprising a core containing [Selection figure] None |