Title:
EXTRACTANT AND EXTRACTION METHOD FOR REMOVING COLOR-EXPRESSING FOREIGN SUBSTANCES FROM COLORED POLYMER CONTAINING ESTER FUNCTIONAL GROUP, AND METHOD FOR CHEMICALLY SELECTING POLYMER CONTAINING ESTER FUNCTIONAL GROUP FROM COLORED POLYMER MIXTURE
Document Type and Number:
WIPO Patent Application WO/2022/235051
Kind Code:
A1
Abstract:
The present invention relates to an extractant and an extraction method for removing color-expressing foreign substances from a colored polymer containing an ester functional group and a method for chemically selecting a polymer containing an ester functional group from a colored polymer mixture and, more specifically, to an extractant capable of effectively removing foreign substances, such as a dye and a pigment, from a colored polymer exhibiting a color by the foreign substances and containing an ester functional group, to a method for eluting most of color-expressing foreign substances by contact with a colored polymer containing an ester functional group while the extractant is maintained at a specific temperature range, and to a method of adding the extractant to a colored polymer mixture to selectively elute foreign substances from only a colored polymer containing an ester functional group and then effectively selecting, through color differentiation, a polymer having the foreign substances removed therefrom and containing an ester functional group.
Inventors:
CHO JOUNGMO (KR)
JO YE RIM (KR)
LE THI HONG NGAN (KR)
JO YE RIM (KR)
LE THI HONG NGAN (KR)
Application Number:
PCT/KR2022/006330
Publication Date:
November 10, 2022
Filing Date:
May 03, 2022
Export Citation:
Assignee:
KOREA RES INST CHEMICAL TECH (KR)
International Classes:
C08J11/22; C08F8/50; C08G85/00
Domestic Patent References:
| WO2013182801A1 | 2013-12-12 |
Foreign References:
| JP2007045874A | 2007-02-22 | |||
| KR20200099200A | 2020-08-21 | |||
| JP2002167357A | 2002-06-11 | |||
| US20200190280A1 | 2020-06-18 | |||
| US20090133200A1 | 2009-05-28 | |||
| US20150059103A1 | 2015-03-05 | |||
| US20090133200A1 | 2009-05-28 | |||
| JPH0359919B2 | 1991-09-12 | |||
| CN201510133888A | 2015-03-25 |
Other References:
AUTEX RESEARCH JOURNAL, vol. 19, no. 2, 2019, pages 201 - 209
Attorney, Agent or Firm:
GHONG-GAN INTERNATIONAL PATENT LAW FIRM (KR)
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