METHOD FOR PRODUCING POLYAMIDE FINE PARTICLES, AND POLYAMIDE FINE PARTICLES

WIPO Patent Application WO/2018/207728

A1

A method for producing polyamide fine particles by polymerizing monomers (A) for a polyamide in the presence of a polymer (B) at a temperature not lower than the crystallization temperature of a polyamide to be obtained, wherein the monomers (A) for a polyamide and the polymer (B) are uniformly dissolved when the polymerization starts and polyamide fine particles are precipitated after the polymerization. Polyamide fine particles which have a number average particle diameter of 0.1-100 μm, a sphericity of 90 or more, a particle diameter distribution index of 3.0 or less, a linseed oil absorption of 100 mL/100 g or less and a crystallization temperature of 150°C or higher. Especially, the present invention is able to provide a polyamide having a high crystallization temperature in the form of fine particles which have smooth surfaces, a narrow particle size distribution and a high sphericity.

ASANO ITARU (JP)

PCT/JP2018/017616

November 15, 2018

May 07, 2018

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TORAY INDUSTRIES (JP)

C08G69/16

WO2012161174A1	2012-11-29
WO2016102879A1	2016-06-30

JPH10316750A	1998-12-02
JPH0873602A	1996-03-19
JP2007119632A	2007-05-17
JP2003171682A	2003-06-20
JP2016186068A	2016-10-27
JPS6040134A	1985-03-02
JP2000248028A	2000-09-12
JP2002080629A	2002-03-19
JP2010053272A	2010-03-11
JPS6040134A	1985-03-02
JPH10316750A	1998-12-02
JPS61181826A	1986-08-14
JPH0873602A	1996-03-19

D.W. VAN KREVELEN: "Properties of Polymers", 2009, ELSEVIER SCIENCE, pages: 215
See also references of EP 3623411A4

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