Invention Publication
- Patent Title: HOLLOW PARTICLES, PRODUCTION METHOD THEREFOR, AND AQUEOUS DISPERSION CONTAINING HOLLOW PARTICLES
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Application No.: EP19867363.4Application Date: 2019-09-11
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Publication No.: EP3858473A1Publication Date: 2021-08-04
- Inventor: HIRATA, Takeshi , YABUKI, Nozomi
- Applicant: Zeon Corporation
- Applicant Address: JP Tokyo 100-8246 6-2, Marunouchi, 1-chome Chiyoda-ku
- Agency: Gerauer, Marc Philippé
- Priority: JP2018184914 20180928
- International Announcement: WO2020066623 20200402
- Main IPC: B01J13/22
- IPC: B01J13/22 ; C08F220/10 ; C08J7/04
Abstract:
Provided are hollow particles which are more excellent in heat resistance and dispersibility than ever before and which are lightweight. The hollow particles containing hollow resin particles having a surface covered with inorganic fine particles, wherein a volume average particle diameter of the hollow particles is from 0.1 µm to 9.0 µm, and a void ratio thereof is from 55% to 95%; wherein a repeating unit constituting the resin of the hollow resin particles contains a crosslinkable monomer unit, and a content of the crosslinkable monomer unit is from 25 to 100 parts by mass, with respect to 100 parts by mass of the resin; wherein a primary particle diameter of the inorganic fine particles is from 10 nm to 120 nm; and wherein the inorganic fine particles are contained at from 5 to 180 parts by mass, with respect to 100 parts by mass of the hollow resin particles.
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