| abstract |
The purpose of the present invention is to provide: a heat-expandable microsphere which has excellent foam stability, and of which the expansion ratio or specific gravity varies little even when heating time is changed; and a use thereof. This heat-expandable microsphere comprises: an outer shell formed of a thermoplastic resin; and a foaming agent which is encapsulated in the outer shell and evaporated by heating, wherein the thermoplastic resin is a polymer of a polymerizable component including acrylonitrile, methacrylonitrile, and acrylic ester, and satisfies a specific condition. |