Title:
HIGH-BARRIER BOTTLE-GRADE POLYESTER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/143003
Kind Code:
A1
Abstract:
The present invention relates to a high-barrier bottle-grade polyester and a preparation method therefor. Polyester chain segments of the high-barrier bottle-grade polyester comprise a terephthalic acid chain segment, an ethylene glycol chain segment and a 2,5-pyridine dimethanol chain segment. 2,5-pyridine dimethanol chain segments of different polyester chain segments are coordinated by means of Fe 3+, and the O atom on hydroxyl and the N atom on pyridine in the 2,5-pyridine dimethanol chain segments participate in coordination. The oxygen permeation coefficient of the high-barrier bottle-grade polyester is 13.35×10 -4 to 15.60×10 -4cm 3/(m·0.1 MPa·24 h), and the heat-resistant temperature is 87-94ºC. The preparation method comprises: uniformly mixing terephthalic acid, ethylene glycol, 2,5-pyridine dimethanol and ferric chloride, and then successively subjecting same to an esterification reaction and a polycondensation reaction to prepare a modified polyester, and tackifying the modified polyester to obtain the high-barrier bottle-grade polyester. The high-barrier bottle-grade polyester of the present invention has a good barrier property and a high heat resistance.
Inventors:
WANG SHANSHUI (CN)
FU HENGYAN (CN)
TANG FANGMING (CN)
NIU ZANGZANG (CN)
CHEN RUI (CN)
YIN LIXIN (CN)
YANG CHAOMING (CN)
FU HENGYAN (CN)
TANG FANGMING (CN)
NIU ZANGZANG (CN)
CHEN RUI (CN)
YIN LIXIN (CN)
YANG CHAOMING (CN)
Application Number:
PCT/CN2021/135294
Publication Date:
July 07, 2022
Filing Date:
December 03, 2021
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
C08G63/685; C08G63/183
Foreign References:
| JPH06287287A | 1994-10-11 | |||
| CN110105534A | 2019-08-09 | |||
| JP2002284869A | 2002-10-03 | |||
| CN112708117A | 2021-04-27 |
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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