公开(公告)号：US10907023B2

公开(公告)日：2021-02-02

申请号：US15990690

申请日：2018-05-28

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chong Min Koo ,  Soon Man Hong ,  Seung Sang Hwang ,  Kyung Youl Baek ,  Hyunchul Park ,  Seunggun Yu ,  Hyesung Cho

IPC: C08J9/228 ,  C08J9/18 ,  C08J9/236 ,  B29C44/34 ,  C23C18/40 ,  B29C44/44 ,  B01J13/14 ,  C08J9/32 ,  C23C18/16 ,  C08J9/14 ,  B29C35/08

Abstract: A method of preparing a polymer hollow particle, a low-specific gravity and monodispersed polymer hollow particle of various shapes prepared using the method, and a composite including the polymer hollow particle are provided. The method includes: a first step of providing, onto a substrate including a engraved pattern, at least one expandable particle comprising a foaming agent-containing expandable core and a thermoplastic polymer shell; a second step of removing an excess of the at least one expandable particle from a resulting product of the first step; a third step of expanding the at least one expandable particle in the engraved pattern of the substrate by thermally treating a resulting product of the second step; and a fourth step of separating, from the substrate, expanded hollow polymer particles which are a resulting product of the third step.