Title:
MODIFIED POLYESTER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/040688
Kind Code:
A1
Abstract:
The present invention relates to a modified polyester and a preparation method therefor. The modified polyester is composed of a terephthalic acid chain segment, an ethylene glycol chain segment, and a dihydric alcohol chain segment containing a branch chain. The dihydric alcohol chain segment containing a branch chain refers to a dihydric alcohol chain segment with a branch chain positioned on one non-terminal carbon of the dihydric alcohol chain segment, wherein the branch chain is a linear carbon chain containing 5 - 10 carbon atoms. The preparation method for the modified polyester involves: carrying out an esterification reaction on terephthalic acid and a dihydric alcohol containing a branch chain under the catalysis of a concentrated sulfuric acid to obtain a dihydric alcohol terephthalate; then, formulating terephthalic acid and ethylene glycol, and carrying out an esterification reaction on same to obtain ethylene glycol terephthalate; and finally, stirring and mixing the two, and under the action of a catalyst and a stabilizing agent, carrying out a polycondensation reaction in a low vacuum stage and a high vacuum stage to obtain the modified polyester. The increasing amplitude in space gaps between molecular chains inside the modified polyester is far greater than that of a branch chain-free polyester at the same temperature, this being beneficial for the degree by which tiny particles such as a dye enter the modified polyester, and improving the dyeing rate.
Inventors:
FAN HONGWEI (CN)
LIU ZHILI (CN)
LI WENGANG (CN)
TANG FANGMING (CN)
WANG LILI (CN)
YIN LIXIN (CN)
LIU ZHILI (CN)
LI WENGANG (CN)
TANG FANGMING (CN)
WANG LILI (CN)
YIN LIXIN (CN)
Application Number:
PCT/CN2017/089943
Publication Date:
March 08, 2018
Filing Date:
June 26, 2017
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
C08G63/183; C08G63/78; D01F6/84
Domestic Patent References:
| WO2012027885A1 | 2012-03-08 |
Foreign References:
| CN106380580A | 2017-02-08 | |||
| CN102020761A | 2011-04-20 | |||
| CN102030893A | 2011-04-27 | |||
| CN101817917A | 2010-09-01 | |||
| JP2014189933A | 2014-10-06 |
Other References:
See also references of EP 3508511A4
None
None
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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