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Prepn process of copolyester capable of being dyed deeply with cationic dye

A preparation process, cationic technology, applied in the direction of single-component polyester rayon, dyeing, textile and papermaking, etc., can solve problems such as uncomfortable brightness and reflection, self-aggregation of titanium dioxide, broken ends, etc., to improve spinning conditions, Good rheology, reducing the effect of broken ends

Active Publication Date: 2007-08-22
ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In cationic dyeable polyester chips widely used in the market at present, the addition amount of polyester dyeing modifier SIPM (also known as the third polyester monomer) is generally lower than 2.0wt%, the main reason is that when the SIPM content exceeds 2.0wt% The broken end is serious when the post-slice is spun. In addition, the conventional cationic dyeable copolyester chips are bright slices, and the woven fibers and fabrics have uncomfortable brightness and reflection. Therefore, it is necessary to add a matting agent titanium dioxide to it. To improve the visual performance of the fabric, adding the matting agent titanium dioxide to the polyester containing SIPE will cause serious self-polymerization of titanium dioxide due to the high acidity, which is reflected in the spinning condition, which often produces serious problems of broken ends

Method used

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  • Prepn process of copolyester capable of being dyed deeply with cationic dye

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Experimental program
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Effect test

Embodiment 1

[0012] The configuration of the SIPE solution described in Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4: first add EG (ethylene glycol) 900L in the preparation kettle, heat up to 100°C for dehydration for 30 minutes and then drop into isophthalic acid Sodium Dimethyl Ester-5-Benzene Sulfonate (SIPM) 475Kg and Calcium Acetate 1.2kg Sodium Acetate 7kg. The temperature is raised to control the top temperature of the tower at about 65°C to receive about 115L of methanol. Add EG to adjust the specific gravity to 1.2g / cm 3 . Cool down to 50-70°C, stir and store for later use.

Embodiment 1

[0014] Put 3000kg of terephthalic acid and 1350kg of ethylene glycol into the first esterification kettle, carry out the esterification reaction at 250°C, after dehydration of 650L, introduce the second esterification kettle and cool down to 240°C, add 450LSIPE solution, 35kg~60kg of polyethylene glycol in sequence Diol, then collect EG100L. Import into the pre-shrinking tank, at 250-280°C, build a vacuum to 1KPa, stir and react for 2 hours, then stir and react under 60Pa in the final shrinking tank for about 100 minutes, discharge and pelletize.

Embodiment 2

[0016] Put 3000kg of terephthalic acid and 1350kg of ethylene glycol into the first esterification kettle, and carry out the esterification reaction at 250°C. After dehydration of 650L, they are introduced into the second esterification kettle, and the temperature is lowered to 240°C. Add 420LSIPE solution, 35kg~60kg polyethylene glycol Alcohol and 20L of 10% fiber-grade titanium dioxide solution, and then collect EG100L. Import into the pre-shrinking tank, at 250-280°C, build a vacuum to 1KPa, stir and react for 2 hours, then stir and react in the final shrinking tank below 60Pa for about 100 minutes, discharge and pelletize.

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Abstract

The preparation process of copolyester capable of being dyed deeply with cationic dye includes the following steps: 1. esterification of terephthalic acid and ethylene glycol in the molar ratio of 1-1.3 under the action of catalyst to prepare glycol terephthalate; 2. adding SIPE solution, polyalkylidene diol or fatty diol derivative and titania solution into glycol terephthalate melt through stirring to produce polycondensation, and pelletizing. Thus produced copolyester has SIPM content of 2.6-3.0 wt%, homogeneously dispersed titania, bright color and excellent texture.

Description

technical field [0001] The invention relates to a preparation process of deep-dyed cationic dyeable copolyester, which can be applied to cationic dyeable filaments, short fibers, non-woven fabrics, etc. and composite spinning with other polyesters and polyamides. Background technique [0002] Due to its high quality and low price, polyester fiber has become the world's largest chemical fiber fabric fiber. Due to its difficult dyeing problem, it is necessary to add polyester dyeing modifier SIPM to prepare cationic dyeable copolyester, so as to solve its problem. Dyeing problems, and the higher the added SIPM content (SIPM content refers to the ratio of SIPM to the overall quality of polyester), the better the dyeability of the fabric, the brighter it is, and the better the color fastness. In cationic dyeable polyester chips widely used in the market at present, the addition amount of polyester dyeing modifier SIPM (also known as the third polyester monomer) is generally lowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183D01F6/62D06P1/00
Inventor 施建强刘雄王建辉周茂林王祖宏
Owner ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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