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Patent Searching and Data


Title:
RESIN PARTICLE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2010/021081
Kind Code:
A1
Abstract:
Disclosed is a method for producing resin particles having a good balance between excellent heat-resistant storage stability and melting characteristics, which conventional resin particles cannot have achieved.  Specifically disclosed is a method for producing resin particles (X) comprising a step wherein resin particles (B) containing a resin (A), which is composed of a crystalline moiety (a) containing a lactone ring-opened polymer (p) as an essential component and an amorphous moiety (b), is treated with carbon dioxide (C) in a liquid or supercritical state, and then (C) is removed.  The heat of fusion of the thus-obtained resin particles as determined by differential scanning calorimetry (DSC) satisfies the following relation (1).       0 ≤ H2/H1 ≤ 0.9       (1) (In relation (1), H1 represents the heat of fusion (J/g) during the first temperature rise as measured by DSC, and H2 represents the heat of fusion (J/g) during the second temperature rise as measured by DSC.)

Inventors:
MUKAI TAKAO (JP)
OTA KOJI (JP)
Application Number:
PCT/JP2009/003418
Publication Date:
February 25, 2010
Filing Date:
July 22, 2009
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD (JP)
MUKAI TAKAO (JP)
OTA KOJI (JP)
International Classes:
C08J3/12; C08J7/04; G03G9/087
Foreign References:
JPS6338951A1988-02-19
JP2006078895A2006-03-23
JP2006321830A2006-11-30
JP2007046038A2007-02-22
JP2000098662A2000-04-07
JPH11282198A1999-10-15
JP2005015589A2005-01-20
JPH08176310A1996-07-09
US20050165139A12005-07-28
US20030125479A12003-07-03
Other References:
ROBERT F. FEDORS ET AL., POLYMER ENGINEERING AND SCIENCE, vol. 14, pages 147 - 154
"Theory and Practice of Emulsion Dispersion", 4250119, TOKUSYU KIKA KOGYO CO., LTD., pages: 80 - 86
See also references of EP 2316871A4
Attorney, Agent or Firm:
HAYASHI, HIROSHI (JP)
Hiroshi Hayashi (JP)
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