Title:
PRODUCTION METHOD FOR FINE POLYAMIDE PARTICLES, AND FINE POLYAMIDE PARTICLES
Document Type and Number:
WIPO Patent Application WO/2020/095702
Kind Code:
A1
Abstract:
[Problem] To obtain biodegradable polyamide particles having a smooth surface and a high sphericity. [Solution] This production method for fine polyamide particles comprises polymerizing a monomer (A) of polyamide 4 or polyamide 3 in the presence of a polymer (B), wherein the monomer (A) of polyamide 4 or polyamide 3 and the polymer (B) are uniformly dissolved at the start of polymerization, and when fine particles of polyamide 4 or polyamide 3 settle out after the polymerization, the square of the difference in solubility parameter between the monomer (A) and the polymer (B) is in the range of 0-25, and the square of the difference in solubility parameter between the polyamide and the polymer (B) is in the range of 0-20. The fine polyamide particles have a number-average particle size of 0.1-300 μm, a particle size distribution index of 3.0 or less, a sphericity of 90 or more, and a linseed oil absorption of 100 mL/100 g or less.
Inventors:
ASANO ITARU (JP)
NAKAMURA TOMOHIKO (JP)
OKUNO YOTA (JP)
MORIOKA NOBUHIRO (JP)
NAKAMURA TOMOHIKO (JP)
OKUNO YOTA (JP)
MORIOKA NOBUHIRO (JP)
Application Number:
PCT/JP2019/041713
Publication Date:
May 14, 2020
Filing Date:
October 24, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J3/14
Domestic Patent References:
| WO2017195705A1 | 2017-11-16 | |||
| WO2018207728A1 | 2018-11-15 |
Foreign References:
| JP2016538416A | 2016-12-08 | |||
| JP2002302547A | 2002-10-18 | |||
| JP2016186068A | 2016-10-27 |
Other References:
D.W. VAN KREVELEN: "Properties of Polymers", 2009, ELSEVIER SCIENCE, pages: 215
See also references of EP 3878893A4
See also references of EP 3878893A4
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