| abstract |
A thermally expandable microcapsule having a core-shell-type structure including a core and a shell, wherein the core contains a volatile substance, the shell contains a polymer, and the polymer contains a monomer mixture and a general formula (1): (In formula (1), R 1 is each independently an unsaturated hydrocarbon group having 2 to 12 carbon atoms, and the unsaturated hydrocarbon group is at least one of -CO-O-, -O-CO-, and -O-. A thermally expandable microcapsule which is a polymer obtained by reacting an organic peroxide represented by (may be discontinued). The thermally expandable microcapsule of the present invention has excellent heat resistance and high foaming magnification, which can suppress plunging in a wide temperature range. |