Title:
SOFTENED THERMOSETTING RESIN PARTICLES
Document Type and Number:
WIPO Patent Application WO/2012/067072
Kind Code:
A1
Abstract:
[Problem] To provide particles having a hardness which is intermediate between the low hardness of conventional thermoplastic resin particles comprising a styrene resin, an acrylic resin or the like and the high hardness of conventional thermosetting resin particles comprising a melamine resin or the like, namely, particles which combine sufficient hardness and softness. [Solution] Softened thermosetting resin particles obtained by a manufacturing process which includes: a step of reacting a monomer compound that contains at least one bifunctional monomer with an aldehyde compound under basic conditions in the presence of suspended colloidal silica having a mean particle diameter of 5 to 70nm to form an aqueous solution of a water-soluble melamine resin precondensate; and a step of adding an acid catalyst to the aqueous solution to deposit spherical softened thermosetting resin particles.
Inventors:
HAYASHI HISATO (JP)
HIDA MASAHIRO (JP)
OZAWA MASAAKI (JP)
HIDA MASAHIRO (JP)
OZAWA MASAAKI (JP)
Application Number:
PCT/JP2011/076195
Publication Date:
May 24, 2012
Filing Date:
November 14, 2011
Export Citation:
Assignee:
NISSAN CHEMICAL IND LTD (JP)
HAYASHI HISATO (JP)
HIDA MASAHIRO (JP)
OZAWA MASAAKI (JP)
HAYASHI HISATO (JP)
HIDA MASAHIRO (JP)
OZAWA MASAAKI (JP)
International Classes:
C08G12/02
Foreign References:
| JP2002293854A | 2002-10-09 | |||
| JP2008239637A | 2008-10-09 | |||
| JP2002293856A | 2002-10-09 | |||
| JPH02500031A | 1990-01-11 | |||
| JPH0249019A | 1990-02-19 | |||
| JPH03239712A | 1991-10-25 | |||
| JP2002284591A | 2002-10-03 | |||
| JP2010099588A | 2010-05-06 |
Attorney, Agent or Firm:
HANABUSA, Tsuneo et al. (JP)
Sepal Tsuneo (JP)
Sepal Tsuneo (JP)
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Claims: