Title:
METHOD FOR PRODUCING POLYESTER RESIN BY USING REGENERATED BIS(2-HYDROXYETHYL) TEREPHTHALATE AQUEOUS SOLUTION
Document Type and Number:
WIPO Patent Application WO/2023/214727
Kind Code:
A1
Abstract:
A regenerated bis(2-hydroxyethyl) terephthalate obtained by the depolymerization of waste polyester is mixed with water to prepare an aqueous solution under specific temperature and concentration conditions, thereby ensuring storage stability. By introducing such a regenerated bis(2-hydroxyethyl) terephthalate aqueous solution into the polymerization of a polyester resin, the uniformity of raw materials and reaction efficiency can be increased, thereby improving the quality of the final polyester resin.
Inventors:
HWANG DA-YOUNG (KR)
KIM HA-NEUL (KR)
LEE YOO JIN (KR)
KIM HA-NEUL (KR)
LEE YOO JIN (KR)
Application Number:
PCT/KR2023/005653
Publication Date:
November 09, 2023
Filing Date:
April 26, 2023
Export Citation:
Assignee:
SK CHEMICALS CO LTD (KR)
International Classes:
C08G63/60; C08J11/24
Domestic Patent References:
| WO2021124149A1 | 2021-06-24 |
Foreign References:
| KR20220055192A | 2022-05-03 | |||
| JP2003055300A | 2003-02-26 | |||
| JP2009173732A | 2009-08-06 | |||
| KR20210067554A | 2021-06-08 |
Attorney, Agent or Firm:
FIRSTLAW P.C. (KR)
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