Title:
METHOD FOR PRDUCING HOLLOW PARTICLES, AND HOLLOW PARTICLES
Document Type and Number:
WIPO Patent Application WO/2022/092265
Kind Code:
A1
Abstract:
The present invention provides a method for producing hollow particles, said method being capable of suppressing variation in shell thickness even in cases where hollow particles having a volume average particle diameter of 10 μm or more are produced. A method for producing hollow particles, each of which is provided with a shell that contains a resin and a hollow part that is surrounded by the shell, while having a void fraction of 50% or more, said method comprising: a step for preparing a mixed liquid that contains a polymerizable monomer, a hydrophobic solvent, a polymerization initiator, a dispersion stabilizer and an aqueous medium; a step for preparing a suspension, in which droplets of a monomer composition that contains the polymerizable monomer, the hydrophobic solvent and the polymerization initiator are dispersed in the aqueous medium, by suspending the mixed liquid; and a step for preparing a precursor composition that contains precursor particles, each of which has a hollow part surrounded by a shell that contains a resin and internally contains the hydrophobic solvent in the hollow part, by subjecting the suspension to a polymerization reaction. With respect to this method for producing hollow particles, the polymerizable monomer comprises a crosslinkable monomer; and the HSP distance between the crosslinkable monomer and the hydrophobic solvent is from 5.80 to 6.50.
Inventors:
YAGYU SAKYO (JP)
Application Number:
PCT/JP2021/040023
Publication Date:
May 05, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08F20/10; C08F2/18
Domestic Patent References:
| WO2020162300A1 | 2020-08-13 | |||
| WO2020261926A1 | 2020-12-30 |
Foreign References:
| JP2020132820A | 2020-08-31 | |||
| JP2010149024A | 2010-07-08 | |||
| JP2016068037A | 2016-05-09 | |||
| JP2021023846A | 2021-02-22 | |||
| JP2020033503A | 2020-03-05 |
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
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