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Normal-pressure cationic dyeable polyester and production method and purpose thereof

A technology of cationic dye and production method, applied in the field of normal pressure cationic dye-dyeable polyester and its production and use, can solve the problems of poor heat resistance and low melting point of polyester, and achieve good heat resistance and thermal stability The effect of high sex and low diethylene glycol content

Inactive Publication Date: 2017-12-15
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent discloses that the problem of high diethylene glycol content in polyester can be effectively solved by adding a basic catalyst, the polyester has a low melting point and poor heat resistance

Method used

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  • Normal-pressure cationic dyeable polyester and production method and purpose thereof
  • Normal-pressure cationic dyeable polyester and production method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 13,000g of PTA (purified terephthalic acid) and 8,600g of EG (ethylene glycol) into the esterification kettle, and stir and react at 250°C for 5 hours; through the judgment of by-products, the esterification reaction rate reaches 97% Above, move the prepared BHT oligomer into the polymerization kettle; add EG first, adjust the molar ratio of EG and PTA in BHT to 1.30:1, stir for 30 minutes and add the stabilizer phosphorus compound trimethyl phosphate; then add Ethylene glycol isophthalate-5-sodium sulfonate (SIPE) 855g, polyethylene glycol (PEG500) with a number average molecular weight of 500g / mol 305g, catalyst tetrabutyl titanate (TBT) 2.5g, aluminum compound (A2E: Toyobo Co., Ltd. aluminum-based catalyst) catalyst 25g, catalyst lithium acetate (LAH) 240g. Subsequently, the pressure was reduced and the temperature was raised at 230°C, and the conventional polyester polycondensation method was used for polymerization to obtain a cationic dyeable copolymer under n...

Embodiment 2

[0068] The molar ratio of EG and PTA in BHT was adjusted to 1.50:1, the content of sulfur element in polyester was 4000ppm, and the content of titanium element was 5ppm. Others were the same as in Example 1, as shown in Table 1. Polyester will not break during the spinning process, and its fiber fabric has good dyeability.

Embodiment 3

[0070] The molar ratio of EG and PTA in BHT was adjusted to 1.80:1, the content of sulfur element in polyester was 6000ppm, and the content of titanium element was 10ppm. Others were the same as in Example 1, as shown in Table 1. Polyester will not break during the spinning process, and its fiber fabric has good dyeability.

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Abstract

The invention discloses normal-pressure cationic dyeable polyester and a production method and purpose thereof. The normal-pressure cationic dyeable polyester is mainly prepared by copolymerization of aromatic diacid or an esterified derivative thereof, aliphatic dihydric alcohol, polyalkylene glycol and aromatic diacid with metal sulfonate group or an esterified derivative thereof under the action of a soluble catalyst. The invention is characterized in that the polyester contains 2000-8000 ppm of element sulphur relative to weight of polyester and 0.5-5.0 wt% of a polyether structure formed by polyalkylene glycols relative to weight of polyester; and melting point of the polyester is 240 DEG C and above. The polyester obtained by the adoption of the soluble catalyst has characteristics of high melting point, high heat stability and good spinnability. Fiber fabric manufacture by the use of the polyester has normal-pressure dyeable performance and good dyeing property.

Description

technical field [0001] The invention relates to a high-melting-point normal-pressure cationic dye-dyeable polyester as well as its production method and application. Background technique [0002] Polyester obtained by copolymerization of aromatic dibasic acid and aliphatic diol is widely used in resin, fiber, film and other fields. At present, people pay more and more attention to environmental protection and energy saving. In terms of fiber application, polyester that can be dyed with cationic dyes at normal pressure and low temperature has become a new demand. [0003] Chinese patent CN101298493 discloses a copolyester polymer that can be dyed with cationic dyes under atmospheric pressure, a manufacturing method thereof, and a copolyester fiber prepared therefrom. Specifically disclosed is a copolyester polymer, which comprises dibasic fatty acids accounting for 1 mol% to 20 mol% of the total dibasic acid components and 1.0 mol% to 2.0 mol% of the total dibasic acid compo...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/85C08G63/84C08G63/83C08G63/86D01F6/84D01F6/92
CPCC08G63/6886C08G63/83C08G63/84C08G63/85C08G63/863C08G63/866D01F6/84D01F6/92
Inventor 柏立军成娟旦浩一
Owner TORAY FIBER RES INST(CHINA) CO LTD
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