| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat-expandable microcapsule having a sufficient amount of gas blowout, and to provide an adhesive sheet using the same. Ž<P>SOLUTION: The heat-expandable microcapsule is prepared by polymerization of a vinyl monomer including at least a nitrile monomer component of 50-80 wt.% and a non-nitrile monomer component of 50 wt.% or less, and includes a shell polymer including an azo compound encapsulating a volatile expanding agent gaseous at a temperature equal to or lower than the softening point of the shell polymer, and the content of a (meth)acrylic acid ester contained in the vinyl monomer is 20-50 wt.%. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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