Title:
HOLLOW PARTICLES
Document Type and Number:
WIPO Patent Application WO/2022/071275
Kind Code:
A1
Abstract:
Provided is a method for producing hollow particles having a high porosity and being difficult to be crushed. The hollow particles comprising a shell containing a resin and a hollow section surrounded by the shell, and having a porosity of 50% or more, wherein the shell contains, as the resin, a polymer containing 70 to 100 parts by mass of a crosslinkable monomer unit in 100 parts by mass of all the monomer units, and in an immersion test of hollow particles, in which 0.1 mg of hollow particles is added to 4 mL of acetone in an environment of 25°C, shaken for 10 minutes under a condition of a shaking speed of 100 rpm, and allowed to stand for 48 hours, the amount of hollow particles that settle in acetone is less than 5% by mass.
Inventors:
WATANABE MASASHI (JP)
Application Number:
PCT/JP2021/035537
Publication Date:
April 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
C08F20/20; C08F2/18
Foreign References:
| JP2003015171A | 2003-01-15 | |||
| JPH11267494A | 1999-10-05 | |||
| CN101113183A | 2008-01-30 | |||
| JP2020132820A | 2020-08-31 | |||
| US20100104647A1 | 2010-04-29 | |||
| JP2016068037A | 2016-05-09 | |||
| JP2016190980A | 2016-11-10 | |||
| JP2002080503A | 2002-03-19 |
Other References:
"Chemical Society of Japan", 30 September 1993, MARUZEN PUBLISHING CO., pages: 498 - 503
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
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