Side chain-containing aliphatic diol modified copolyester section and preparation method thereof

An aliphatic diol, copolyester technology, applied in the direction of one-component copolyester rayon, etc., can solve the problems of difficult polymerization, affecting the performance of spinnable fabrics, and unstable spinning. The effect of reducing crystallization performance and glass transition temperature, good market application value and low cost

Inactive Publication Date: 2009-12-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High temperature and high pressure cationic dyeable copolyester fiber CDP, because the dyeing must be carried out under high temperature and high pressure conditions, when the fiber is blended with natural fibers such as cotton, wool and linen, the properties of natural fibers will be affected
Atmospheric pressure cationic dyes are easy to dye polyester fiber ECDP. Due to the introduction of polyether into the macromolecule, the heat resistance of the fiber is poor and the spinning is unstable, which affects the spinnability and the performance of the fabric.
Since the 1990s, developed countries such as the United States and Japan have developed a batch of brand-new products with normal pressure cationic dyes and easy-to-dye polyester fibers HCDP by increasing the SIP content. This fiber has better dye upt

Method used

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  • Side chain-containing aliphatic diol modified copolyester section and preparation method thereof
  • Side chain-containing aliphatic diol modified copolyester section and preparation method thereof
  • Side chain-containing aliphatic diol modified copolyester section and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using semi-continuous polymerization equipment, the first esterification tank is charged with 1 ton of PTA, 410 kg of EG and 74 kg of MPD for esterification, while adding 0.01 wt% antimony acetate catalyst and 0.02 wt% triphenyl phosphate (relative to PTA) , the reaction temperature is 260°C, after a residence time of 3 hours, the reactant enters the second esterification tank, and at the same time injects SIPE equivalent to 1.5mol% of PTA for further esterification, the reaction temperature is 250°C, and after a residence time of 2 hours, the reaction The product enters the polycondensation tank, the reaction temperature is 270-280° C., and stays for 3 hours. After the reaction is completed, the material is discharged and pelletized to obtain copolyester chips containing 10 mol% of MPD units and 1.5 mol% of SIPE units. The copolyester has an intrinsic viscosity of 0.486 and a melting point of 214°C.

Embodiment 2

[0033] Adopt semi-continuous polymerization equipment, the first esterification tank adds 1 ton of PTA and 410 kilograms of EG to carry out esterification, adds the antimony acetate catalyst of 0.01wt% and the triphenyl phosphate (relative to PTA) of 0.02wt% simultaneously, reaction temperature 260 ℃, after a residence time of 3 hours, the reactant enters the second esterification tank, and simultaneously injects 74 kg of MPD and SIPE equivalent to 1.5mol% of PTA for further esterification. The reaction temperature is 250 ℃, and after a residence time of 2 hours, the reaction The material enters the polycondensation tank, and the reaction temperature is 270-280° C., and stays for 3 hours. After the reaction is completed, the material is discharged and pelletized to obtain copolyester chips containing 6 mol% of MPD units and 1.5 mol% of SIPE units. The copolyester has an intrinsic viscosity of 0.592 and a melting point of 228°C.

Embodiment 3

[0035] Using semi-continuous polymerization equipment, the first esterification tank is charged with 1 ton of PTA, 410 kg of EG and 120 kg of MPD for esterification, while adding 0.01 wt% antimony acetate catalyst and 0.02 wt% triphenyl phosphate (relative to PTA) , the reaction temperature is 260°C, after a residence time of 3 hours, the reactant enters the second esterification tank, and at the same time injects SIPE equivalent to 1.5mol% of PTA for further esterification, the reaction temperature is 250°C, and after a residence time of 2 hours, the reaction The product enters the polycondensation tank, and the reaction temperature is 270-280° C., and stays for 3 hours. After the reaction is completed, the material is discharged and pelletized to obtain copolyester chips containing 15 mol% of MPD units and 1.5 mol% of SIPE units. The copolyester has an intrinsic viscosity of 0.476 and a melting point of 209°C.

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Abstract

The invention relates a side chain-containing aliphatic diol modified copolyester section and a preparation method thereof; the section is copolymerized by terephthalic acid, ethanediol, m-benzene dicarboxylic acid diethyl ester-5-sodium sulfonate or potassium sulfonate and side chain-containing aliphatic diol and is synthesized in a semicontinuous polymerzation device. The copolyester section of the invention can be dyed to dark color with cationic dye at room temperature and normal pressure; the crystallization property and the glass state temperature of the copolyester are reduced so that the prepared fibre has extremely soft hand feeling; the manufacturing process has no special demand on devices and the cost is low so that the preparation method is applicable to industrialized production.

Description

technical field [0001] The invention belongs to the field of cationic dye-dyeable copolyester fiber and its preparation, in particular to a copolyester chip modified with side chain aliphatic dihydric alcohol and its preparation. Background technique [0002] There are many ways to improve the dyeability of polyester fibers. The most widely used method is to add modified monomers for copolymerization, which can be roughly divided into the following three types: (1) Dyeable monomers for cationic dyes, such as sodium m-benzenesulfonate (or potassium ) class; (2) dyeable monomers of disperse dyes, such as isophthalic acid with meta-structure; polyethylene glycol and sebacic acid with flexible structure; (3) dyeable monomers of acid dyes, such as Amino compounds. [0003] Cationic dyes can dye polyester fibers. It was invented by DuPont Company of the United States in 1958. The trade name is DACON, referred to as CDP. It was industrialized in 1962. In the 1980s, Japan's Toray ...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78D01F6/84
Inventor 顾利霞龚静华俞力为付昌飞王学利
Owner DONGHUA UNIV
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