METHOD FOR IMPROVING DYEING PERFORMANCE OF POLYETHYLENE TEREPHTHALATE FIBER

WIPO Patent Application WO/2023/051487

A1

The present invention relates to a method for improving the dyeing performance of polyethylene terephthalate fiber, comprising: first, preparing modified polyethylene terephthalate using dimethyl terephthalate, ethylene glycol, glycerol and 1,2-propanediol isobutyl-POSS as raw materials, and using ethylene glycol antimony as a catalyst; then, producing modified polyethylene terephthalate fiber from the obtained modified polyethylene terephthalate, and finally dyeing the modified polyethylene terephthalate fiber. The molar ratio of dimethyl terephthalate, ethylene glycol, glycerol and 1,2-propanediol isobutyl-POSS is 1:0.960-0.984:0.015-0.035:0.001-0.005, and a dye uptake rate of the modified polyethylene terephthalate fiber during dyeing is 17.02-18.49 mg·g-1. In the method of the present invention, by means of using a certain amount of glycerol and 1,2-propanediol isobutyl-POSS as monomers, which are copolymerized with dimethyl terephthalate to obtain an easily-dyed PET fiber, the use of complex comonomers is avoided. The present invention has a simple process, strong spinnability of the polymer melt, and high potential for large-scale production.

ZHANG JINGJING (CN)
YU XIUFENG (CN)
TANG FANGMING (CN)
WANG LILI (CN)
WANG XUE (CN)
WEI CUNHONG (CN)

PCT/CN2022/121539

April 06, 2023

September 27, 2022

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JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)

D01F6/84; C08G63/695; D06P1/16; D06P3/54

CN113861401A	2021-12-31
EP1493853A1	2005-01-05
KR20100070885A	2010-06-28
CN107604463A	2018-01-19
JP2005220160A	2005-08-18
US20210246577A1	2021-08-12
KR20110073970A	2011-06-30
CN105153654A	2015-12-16
KR20090032434A	2009-04-01

TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)

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