PROBLEM TO BE SOLVED: To provide a method for generating a large amount of hollow particles in a short time, without removal of core material.SOLUTION: In a process for preparing a microcapsule having internally capsulated liquid or solid with interfacial polymerization, gas pressure is applied to the internally capsulated liquid so that gas is excessively dissolved than under normal pressure environment. Consequently, foam formation in the internally capsulated liquid is facilitated during film formation under normal pressure environment, so that a hollow particle is manufactured resulting from the film formation with a gas phase being internally held.COPYRIGHT: (C)2015,JPO&INPIT【課題】中空粒子を芯物質除去をすることなく短時間で多量に発生させる。【解決手段】界面重合法によって液体もしくは固体を内包するマイクロカプセルを調製する工程において、内包液体を気体で加圧して常圧環境時より過剰に気体を溶解させ常圧環境での膜形成時に内包液体に発泡を促すことで内部に気相を有したまま膜形成を生じさせ中空粒子を製造する。【選択図】図2
