Title:
METHOD FOR MANUFACTURING SINGLE-HOLE HOLLOW POLYMER MICROPARTICLES
Document Type and Number:
WIPO Patent Application WO/2012/014279
Kind Code:
A1
Abstract:
Disclosed is a method for manufacturing single-hole hollow polymer microparticles having extremely uniform inner and outer diameters without the need for a sorting process. Also disclosed are the single-hole hollow polymer microparticles manufactured using said method. Said method includes: a step in which a seed-particle dispersion liquid, in which seed particles containing a non-crosslinked polymer are dispersed in a water-containing dispersion medium, is mixed with a radically polymerizable monomer, an oil-soluble solvent, and an oil-soluble polymerization initiator, causing the seed particles to absorb the radically polymerizable monomer, the oil-soluble solvent, and the oil-soluble polymerization initiator, yielding a liquid dispersion of swollen particle droplets; and a step in which the radically polymerizable monomer in said swollen particle droplets is polymerized. The relationship between the SP value (SPp) of the polymer obtained by polymerizing said radically polymerizable monomer and the SP value (SPs) of the aforementioned oil-soluble solvent satisfies equation (1).
(1) 2.1 ≤ SPp - SPs ≤ 7.0
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Inventors:
YAMAUCHI HIROSHI (JP)
YAMADA YASUYUKI (JP)
YAMADA YASUYUKI (JP)
Application Number:
PCT/JP2010/062603
Publication Date:
February 02, 2012
Filing Date:
July 27, 2010
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD (JP)
YAMAUCHI HIROSHI (JP)
YAMADA YASUYUKI (JP)
YAMAUCHI HIROSHI (JP)
YAMADA YASUYUKI (JP)
International Classes:
B01J13/04; C08F2/44; C08J3/12
Domestic Patent References:
| WO2010035680A1 | 2010-04-01 |
Foreign References:
| JP2010100799A | 2010-05-06 | |||
| JP2005232426A | 2005-09-02 | |||
| JPH05125127A | 1993-05-21 | |||
| JPH0468324B2 | 1992-11-02 | |||
| JPH0468324B2 | 1992-11-02 | |||
| JPH04279637A | 1992-10-05 | |||
| JPH04279637A | 1992-10-05 | |||
| JP2002105104A | 2002-04-10 |
Other References:
TOSHINAO OKITSU, SETCHAKU, vol. 40, no. 8, pages 342 - 350
See also references of EP 2599798A4
See also references of EP 2599798A4
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
Patent business corporation Yasutomi international patent firm (JP)
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Claims: