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Title:
METHOD FOR PRODUCING CROSSLINKED SPHERICAL POLYMER PARTICLE
Document Type and Number:
WIPO Patent Application WO/2006/106610
Kind Code:
A1
Abstract:
A raw material monomer containing a monomer having two or more unsaturated double bonds and an unsaturated monomer having a hydrophilic functional group or an active hydrogen group is subjected to solution polymerization by using a polymerization initiator in a solvent which dissolves the raw material monomer but does not dissolve a polymer produced by the polymerization. Consequently, crosslinked spherical polymer particles having a narrow particle size distribution and relatively uniform particle sizes can be commercially advantageously and highly stably produced by a simple process without using seed particles.

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JPH05506469INDUSTRIAL APPLICABILITY: Precipitation polymerization of a copolymer of vinyllactam and a polymerizable carboxylic acid using an undersurface supply.
Inventors:
HASHIBA TOSHIFUMI (JP)
HAYAKAWA KAZUTOSHI (JP)
KUDO SATOMI (JP)
Application Number:
PCT/JP2006/306096
Publication Date:
October 12, 2006
Filing Date:
March 27, 2006
Export Citation:
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Assignee:
NISSHIN SPINNING (JP)
HASHIBA TOSHIFUMI (JP)
HAYAKAWA KAZUTOSHI (JP)
KUDO SATOMI (JP)
International Classes:
C08F2/06
Foreign References:
JPH03137105A1991-06-11
JPH03170504A1991-07-24
JPH0395204A1991-04-19
JPS6433111A1989-02-03
JPH01315408A1989-12-20
JPH01163663A1989-06-27
JPH07179504A1995-07-18
JP2002097205A2002-04-02
JPH10273503A1998-10-13
JP2003073405A2003-03-12
Attorney, Agent or Firm:
Kojima, Takashi (16-12 Ginza 2-chom, Chuo-ku Tokyo 61, JP)
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