Title:
熱膨張性微小球およびその製造方法
Document Type and Number:
Japanese Patent JP5107718
Kind Code:
B2
Abstract:
The method produces heat-expandable microspheres, which comprise a shell of thermoplastic resin and a non-fluorine blowing agent encapsulated therein having a boiling point not higher than the softening point of the thermoplastic resin, and comprises a step of dispersing an oily mixture containing a polymerizable component, the blowing agent, and a polymerization initiator containing a peroxydicarbonate in an aqueous dispersing medium to polymerize the polymerizable component contained in the oily mixture. The resultant heat-expandable microspheres have a shell which is less apt to become thinner than its theoretical value, contain minimum amount of resin particle inside their shell, and have excellent heat-expanding performance.
Inventors:
Toshiaki Masuda
Kenichi Kitano
Katsushi Miki
Takeshi Inohara
Takayuki Aoki
Kenichi Kitano
Katsushi Miki
Takeshi Inohara
Takayuki Aoki
Application Number:
JP2007540933A
Publication Date:
December 26, 2012
Filing Date:
October 04, 2006
Export Citation:
Assignee:
Matsumoto Yushi-Seiyaku Co., Ltd.
International Classes:
C08F2/44; B01J13/14
Domestic Patent References:
| JP2001151895A | 2001-06-05 |
Foreign References:
| WO1999043758A1 | 1999-09-02 | |||
| WO1999043758A1 | 1999-09-02 | |||
| WO2005049698A1 | 2005-06-02 |
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation