Title:
INDUSTRIAL POLYESTER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/113621
Kind Code:
A1
Abstract:
The present invention relates to an industrial polyester and a preparation method therefor. The method comprises: terephthalic acid and ethylene glycol are esterified, and are prepared into a polyester by means of polycondensation under the catalytic action of a mixture of ethylene glycol magnesium and ethylene glycol antimony, and then the polyester is pelletized to obtain polyester chips, wherein in the polyester chips, the content of terminal carboxyl groups is less than 15 mol/t, the content of oligomers in percentage by mass is less than 0.5%, and the content of diethylene glycol in percentage by mass is less than 0.5%. The ethylene glycol magnesium in the present invention is mild, also serves as a thermal degradation catalyst, has a low thermal degradation coefficient, and causes few side reactions in the reaction process, thereby reducing production of terminal carboxyl groups and oligomers during processing. In the present invention, oligomers produced in the polymerization process are reduced, and thermal degradation during processing is reduced; therefore, impurities in the polyester are greatly reduced. Meanwhile, the amount of nucleating agent in the polyester is reduced, so that the probability of homogeneous nucleation is increased on the basis of reducing heterogeneous nucleation, thereby facilitating the growth of grain size and the optimization of crystallization completeness in polyester industrial yarn fibers.
Inventors:
FAN HONGWEI (CN)
TANG FANGMING (CN)
WANG XIAOYU (CN)
LI WENGANG (CN)
WANG LILI (CN)
WANG SHANSHUI (CN)
LIU QIANHAN (CN)
NIU ZANGZANG (CN)
TANG FANGMING (CN)
WANG XIAOYU (CN)
LI WENGANG (CN)
WANG LILI (CN)
WANG SHANSHUI (CN)
LIU QIANHAN (CN)
NIU ZANGZANG (CN)
Application Number:
PCT/CN2016/085409
Publication Date:
July 06, 2017
Filing Date:
June 12, 2016
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
C08G63/86; C08G63/183; C08G63/83; C08G63/90; C25B3/13; D01F1/10; D01F6/92
Foreign References:
| CN105461911A | 2016-04-06 | |||
| CN1986596A | 2007-06-27 | |||
| CN102164985A | 2011-08-24 | |||
| CN103476863A | 2013-12-25 | |||
| CN1844188A | 2006-10-11 | |||
| CN101020744A | 2007-08-22 |
Other References:
See also references of EP 3381964A4
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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