Title:
IRREGULARLY SHAPED RESIN PARTICLES, METHOD FOR PRODUCING SAME, AND USE OF SAME
Document Type and Number:
WIPO Patent Application WO/2013/027849
Kind Code:
A1
Abstract:
Provided are: irregularly shaped resin particles which have improved characteristics such as light diffusion characteristics and reflection characteristics; and a method for producing the irregularly shaped resin particles. The irregularly shaped resin particles are non-spherical irregularly shaped resin particles, each of which has a circular contour when viewed from the direction in which the particle has the maximum projected area, while having a non-circular contour when viewed from the direction in which the particle has the minimum projected area. Each irregularly shaped resin particle contains a first resin component (1) and a second resin component (2) that are different from each other, and the second resin component (2) is unevenly distributed near the surface of each irregularly shaped resin particle. A method for producing irregularly shaped resin particles is a method in which a polymerizable vinyl monomer in an aqueous emulsion is absorbed by particles that are formed from a resin and polymerized, or a method in which a solution that is obtained by dissolving a resin in a polymerizable vinyl monomer is polymerized in an aqueous medium. The resin has a weight average molecular weight within the range of 150,000-1,000,000 and has a portion that is derived from a (meth)acrylic acid ester which contains a halogenated alkyl group having 2-10 carbon atoms or an alicyclic hydrocarbon group. The polymerizable vinyl monomer contains 5-50% by weight of a crosslinkable monomer.
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Inventors:
HARADA RYOSUKE (JP)
Application Number:
PCT/JP2012/071558
Publication Date:
February 28, 2013
Filing Date:
August 27, 2012
Export Citation:
Assignee:
SEKISUI PLASTICS (JP)
HARADA RYOSUKE (JP)
HARADA RYOSUKE (JP)
International Classes:
C08F2/44
Domestic Patent References:
| WO2010113812A1 | 2010-10-07 |
Foreign References:
| JP2011105909A | 2011-06-02 | |||
| JP2011006664A | 2011-01-13 | |||
| JP2004027008A | 2004-01-29 | |||
| JP2010001331A | 2010-01-07 | |||
| JPH1060011A | 1998-03-03 | |||
| JPH11140139A | 1999-05-25 |
Other References:
REFERENCE MANUAL FOR THE COULTER MULTISIZER, 1987
REFERENCE MANUAL FOR THE COULTER MULTISIZER, 1987
See also references of EP 2754676A4
REFERENCE MANUAL FOR THE COULTER MULTISIZER, 1987
See also references of EP 2754676A4
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
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Claims: