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Preparation technologies of modified copolyester chip and fiber

A preparation process and copolyester technology, which is applied in the direction of single-component copolyester rayon, etc., can solve the problems of difficult and accurate control of copolyester components, disordered ethylene glycol composition ratio, and unstable product performance. Achieve the effects of bright colors, good fabric resilience and good dyeability of disperse dyes

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low-molecular aliphatic diols usually have a similar boiling point to ethylene glycol, and will enter the ethylene glycol system of the polymerization device with ethylene glycol, causing the ethylene glycol composition ratio of the system to be disordered; and, under the conditions of polyester polymerization , the side reaction is more complicated, as a result, the copolyester component is difficult to control accurately, and the product performance is unstable

Method used

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  • Preparation technologies of modified copolyester chip and fiber
  • Preparation technologies of modified copolyester chip and fiber
  • Preparation technologies of modified copolyester chip and fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation technology of normal temperature and pressure disperse dyeable polyester chip and fiber, its process flow chart is as follows figure 1 As shown, proceed as follows:

[0029] (1) Using 20 L batch polymerization equipment, add 1 mol of PTA, 1.4 mol of MPDO and ethylene glycol antimony equivalent to 0.013 wt % of PTA weight at the same time. Under the condition of 250° C., stirring for about 2.0 hours, the esterification reaction was carried out.

[0030] (2) After the effluent reaches the theoretical amount, decompress and then vacuumize for about 40 minutes. After the system reaches low vacuum, release the vacuum to normal pressure and release the product, which is 2-methyl 1,3-propanediol / terephthalic acid low Polymer BHMPOT. The oligomer BHMPOT has a degree of polymerization of about 3~4 and basically no free 2-methyl-1,3-propanediol.

[0031] (3) Using 300 L batch polymerization equipment, add 1 mol of PTA, 1.30 mol of EG, and ethylene glycol ...

Embodiment 2

[0037] A kind of preparation technology of normal temperature and pressure disperse dyeable polyester chip and fiber, its process flow chart is as follows figure 1 As shown, proceed as follows:

[0038] (1) Using 3M3 batch polymerization equipment, add 1 mol of PTA, 1.4 mol of MPDO and ethylene glycol antimony equivalent to 0.013 wt% of PTA weight at the same time, at a pressure of 0.20MPA~0.35MPA and a temperature of 230~250℃ Under the condition, stir about 4.0 hours, carry out esterification reaction.

[0039] (2) After the effluent reaches the theoretical amount, depressurize and evacuate for about 1.4 hours. After the system reaches low vacuum, release the vacuum to normal pressure, and release the product to the BHMPOT insulation (temperature about 265°C) storage tank, which is 2-methyl 1. 3 propylene glycol / terephthalic acid oligomer BHMPOT. The oligomer BHMPOT has a degree of polymerization of about 3~4 and basically no free 2-methyl-1,3-propanediol.

[0040] (3) Add...

Embodiment 3

[0043] A kind of normal temperature and normal pressure cationic dyeable polyester chip and fiber preparation process, its process flow chart is as follows figure 2 As shown, proceed as follows:

[0044] (1) Using 20 L batch polymerization equipment, add 1 mol of PTA, 1.4 mol of MPDO and ethylene glycol antimony equivalent to 0.013 wt % of PTA weight at the same time. Under the condition of 250°C, stir for about 2.0 hours to carry out the esterification reaction.

[0045] (2) After the effluent reaches the theoretical amount, decompress and then vacuumize for about 40 minutes. After the system reaches a low vacuum, release the vacuum to normal pressure to release the product, which is 2-methyl 1,3-propanediol / terephthalic acid low Polymer BHMPOT. The oligomer BHMPOT has a degree of polymerization of about 3~4, and basically no free 2-methyl-1,3-propanediol.

[0046] (3) Using 300 L batch polymerization equipment, add 1 mol of PTA, 1.30 mol of EG and ethylene glycol antimon...

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Abstract

The invention discloses a preparation technology of a modified copolyester chip. The technology comprises the following steps: (1) mixing terephthalic acid with ethylene glycol, adding a catalyst, and carrying out esterification reaction under the conditions that the pressure is 0.20-0.35MPA and the temperature is 230-250 DEG C; (2) carrying out condensation polymerization on a mixture obtained after the esterification reaction is ended, so as to obtain a low polymer of ethylene glycol / terephthalic acid; (3) esterifying liquid aliphatic dibasic alcohol and terephthalic acid, so as to obtain a low polymer of liquid aliphatic dibasic alcohol / terephthalic acid, and adding the low polymer to the low polymer of ethylene glycol / terephthalic acid, so as to prepare the modified copolyester chip which can be dyed by a disperse dye at normal temperature and normal pressure. Meanwhile, the invention also discloses another preparation technology of the modified copolyester chip. In addition, the invention also discloses a preparation technology of a modified copolyester fiber. By adopting the preparation technologies, the condition that the copolyester is stable in components, stable in product performance, good in rebound resilience of fiber textile, vivid in color, soft in handle, and pilling-resistant is ensured.

Description

technical field [0001] The invention relates to a preparation process of modified copolyester chips and fibers, which belongs to the field of chemical industry. Background technique [0002] As the synthetic fiber with the largest output, polyester fiber has indeed played a major role in solving people's clothing problems. Due to the high regularity of the molecular structure of conventional polyesters, there are deficiencies in dyeability, so it is necessary to improve its dyeing, mainly cationic dyeable polyester (ECDP) at room temperature and pressure, and cationic dyeable polyester (CDP) at high temperature and pressure, and Disperse dyes can dye polyester. [0003] The above-mentioned dyeing modified polyester has been used for many years, but there are still deficiencies, such as the poor heat resistance of the fourth additive polyethylene glycol (PEG), the problem of adding polyethylene glycol (PEG) to the continuous polymerization system is that polyethylene glycol ...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/688C08G63/78D01F6/84
Inventor 成康生
Owner CHINA PETROLEUM & CHEM CORP
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