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Cationic dye for copolyester slice and fiber and its prepn.

A cationic dye and copolyester technology, applied in the field of synthetic fibers, can solve the problems of poor dyeability, high degree of crystallinity and orientation, low polarity, etc., and achieve the effect of soft luster, soft fabric and soft hand feeling

Inactive Publication Date: 2002-08-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the physical and mechanical properties and comprehensive wearability of polyester fibers are excellent, due to the tight aggregation of polyester molecular chains, high crystallinity and orientation, low polarity, and lack of hydrophilicity, the tortuous long-chain molecules of polyester There is no gap between the dye molecules that can properly accommodate the dye molecules, so the dye particles are not easy to penetrate into the fiber, the dyeability is poor, and there are few types of dyes that can be used. Polyester fibers can only be dyed with disperse dyes, high temperature dyeing and hot melt dyeing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using batch polyester polymerization equipment, add catalyst SbAc while adding PTA and EG 3 Stir 400g at 240-250°C for 3 hours. When the water output reaches 90% of the theoretical value, add SiPM ethylene glycol solution containing 2.4 mole percent of PTA to carry out polycondensation reaction. The temperature is controlled at 270-300°C. <1mmHg, the copolymer can be obtained with an intrinsic viscosity of 0.62 and a Tm of 250°C.

Embodiment 2

[0020] Adopt batch-type polyester polymerization equipment, add SiPM ethylene glycol solution containing 3.6 mole percent of PTA after the completion of PTA and EG esterification, fully stir and polycondense, and discharge copolyester chips Tm = 248 ° C, [η ]=0.60.

Embodiment 3

[0022] Adopt intermittent polyester polymerization equipment, add SiPM ethylene glycol solution containing 7.2 mole percent of PTA after the esterification of PTA and EG is completed, fully stir and polycondense, and the discharged copolyester chip Tm=238 ° C, [η ]=0.54.

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Abstract

The present invention relates to a kind of cation-dyeable copolyester chip of fibre produced by copolymerization of terephthalic acid monomer, ethylene ester isophthalate-5-sodium sulfonate (potassium sulfonate) monomer and glycol monomer and its preparation method. Said ivnention fibre features cation-dyeability of normal temp. and normal pressure, high contractility, soft hand touch and resisting fuzzy and pilling, can be extensively used for pure yarn or blending with natural fibres of silk, cotton, wool and bast fibre to obtain various shell fabrics.

Description

technical field [0001] The invention relates to a synthetic fiber, in particular to a copolyester chip or fiber easily dyed by cationic dyes and a preparation method thereof. Background technique [0002] Polyester is a fiber made from polyester as raw material through melt spinning and post-processing. The earliest polyester was synthesized and spun into fibers by Carothers of DuPont in 1928 with aliphatic diacids and aliphatic diols. However, this polyester fiber has a low melting point (~65°C), is easily hydrolyzed, and is not resistant to alkali, so it has no practical value. In 1941, Winfield and others in the United Kingdom selected aromatic terephthalic acid (PTA) and ethylene glycol (EG) to synthesize ethylene terephthalate, and successfully made fibers with practical value, which had a high melting point. At 250°C, it is named Terylene. In 1951, DuPont of the United States took Dacron as its trade name, and in 1953 built the world's first polyester fiber factory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16D01F6/62
Inventor 顾利霞肖茹张斌吴承训仲蕾兰
Owner DONGHUA UNIV
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