| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermally expandable microcapsule which causes less bursting or shrinking even at a high temperature, while maintaining a high expansion ratio, and to provide an expandable thermoplastic resin masterbatch using the thermally expandable microcapsule, an expansion molded article, and a method for producing the thermally expandable microcapsule. <P>SOLUTION: In this thermally expandable microcapsule in which a volatile expanding agent is involved as a core agent in a shell composed of a polymer, the shell contains a polymer obtained by polymerizing a monomer composition containing a nitrile-based monomer and a monomer having a carboxyl group, and a thermosetting resin, wherein the thermosetting resin has two or more functional groups which react with a carboxyl group in each molecule and does not have a radically polymerizable double bond. <P>COPYRIGHT: (C)2012,JPO&INPIT |
