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Cationic dyeable polyester and preparation method thereof

A cationic and polyester technology, applied in the direction of single-component copolyester rayon, etc., can solve problems such as poor structural regularity, poor dyeing performance, and limited fiber applications

Pending Publication Date: 2022-03-11
CHINESE TEXTILE ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional PET has a dense structure and no dyeing groups, resulting in poor dyeing performance. It can only be dyed with disperse dyes under high temperature and high pressure conditions.
The technical solution for improving the PET polymerization process in the prior art results in poor product structure, which limits its application in fiber production

Method used

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  • Cationic dyeable polyester and preparation method thereof
  • Cationic dyeable polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix terephthalic acid and ethylene glycol with a molar ratio of 1:1.4, as well as catalyst and stabilizer, and then add them to the esterification reactor for esterification reaction. The catalysts are antimony trioxide and zinc acetate. The amount of catalyst added 0.06% of the copolyester weight, the stabilizing agent is triphenyl phosphite, the addition of the stabilizing agent is 0.05% of the copolyester weight, the temperature of the esterification reaction is 245 ℃, when the esterification rate reaches 90%, The esterification reaction is over.

[0032] The mixed solution of the isophthalic acid-5-sodium sulfonate and ethylene glycol with an esterification rate of 75% is added to the reaction system, and the amount of the added isophthalic acid-5-sodium sulfonate is for the system. 1.5% of the amount of substance of phthalic acid. After mixing evenly, continue to react under normal pressure for 60 minutes;

[0033] Then the temperature was raised to 255° C. for p...

Embodiment 2

[0035] Mix terephthalic acid and ethylene glycol with a molar ratio of 1:1.2, as well as catalyst and stabilizer, and then add them to the esterification reactor for esterification reaction. The catalyst is ethylene glycol antimony, and the amount of catalyst added is 0.06% of the ester weight, the stabilizer is trimethyl phosphate, the added amount of the stabilizer is 0.005% of the copolyester weight, the temperature of the esterification reaction is 265 ° C, when the esterification rate reaches 92%, the esterification reaction ends .

[0036] The mixed solution of isophthalic acid-5-sodium sulfonate and ethylene glycol with an esterification rate of 80% is added to the reaction system, and the amount of the substance of the added isophthalic acid-5-sodium sulfonate is for the system. 1.5% of the amount of substance of phthalic acid. After mixing evenly, continue to react at normal pressure for 30 minutes;

[0037] Then the temperature was raised to 275° C. for precondensa...

Embodiment 3

[0039]Mix terephthalic acid and ethylene glycol with a molar ratio of 1:1.3, catalyst and stabilizer and add them into the esterification reactor for esterification reaction. The catalysts are antimony trioxide and antimony acetate. The amount of catalyst added 0.06% of the copolyester weight, the stabilizer is tetrakis (3,5-di-tert-butyl-4-hydroxyl) pentaerythritol phenylpropionate, the addition of the stabilizer is 0.005% of the copolyester weight, the esterification reaction The temperature is 250°C, and when the esterification rate reaches 95%, the esterification reaction ends.

[0040] The mixed solution of isophthalic acid-5-sodium sulfonate and ethylene glycol with an esterification rate of 85% is added to the reaction system, and the amount of the added isophthalic acid-5-sodium sulfonate is for the system. 1.5% of the amount of substance of phthalic acid. After mixing evenly, continue to react at normal pressure for 30 minutes;

[0041] Then the temperature was rais...

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Abstract

The invention provides cationic dyeable polyester and a preparation method thereof, and belongs to the technical field of high polymer materials. The cationic dyeable polyester does not contain particulate matter impurities, is beneficial to subsequent spinning processing, and has important significance on expansion and application of the cationic dyeable polyester. The preparation method of the cationic dyeable polyester can be used for preparing the cationic dyeable polyester, and comprises the following steps: firstly, mixing terephthalic acid and dihydric alcohol in a molar ratio of 1: (1.2-1.4), and then carrying out esterification reaction to obtain an esterification product; then, adding an ester of m-phthalic acid-5-sulfonate and ethylene glycol into the esterification product, and carrying out normal-pressure reaction to obtain an intermediate product; finally, the intermediate product is sequentially subjected to condensation polymerization, cooling and grain-sized dicing to obtain the cationic dyeable polyester chip provided by the invention, and the side reaction generated when a mixture of m-phthalic acid-5-sulfonate and ethylene glycol is directly used is avoided, so that the prepared cationic dyeable polyester does not contain particulate matter impurities, and the cationic dyeable polyester chip has the advantages of simple preparation process and low cost. And normal proceeding of subsequent spinning processing is facilitated.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a cationic dyeable polyester and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET), also known as polyester resin, is a condensation polymer of terephthalic acid and ethylene glycol. Conventional PET has a dense structure and no dyeing groups, resulting in poor dyeing performance. It can only be dyed with disperse dyes under high temperature and high pressure conditions. The technical solution for improving the PET polymerization process in the prior art has poor product structure regularity, which limits its application in fiber production. Contents of the invention [0003] In view of this, the present invention provides a kind of cationic dyeable polyester and its preparation method, the process side reaction of making cationic dyeable polyester by this preparation method is few, and the prepared cationic dyeable polyeste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/78D01F6/84
CPCC08G63/6886C08G63/78D01F6/84
Inventor 李志勇黄庆金剑张衡张凯悦储永竞
Owner CHINESE TEXTILE ACAD