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A kind of preparation method of cationic fiber dyeable artificial leather

A cationic fiber and artificial leather technology, which is applied in the field of preparation of cationic fiber dyeable artificial leather, can solve the problems of increased pressure of spinning components, high initial pressure of spinning, and increased viscosity of polyester, so as to reduce the initial pressure and achieve bright colors , the effect of suppressing the increase of filter pressure

Active Publication Date: 2019-05-21
江苏尚科聚合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cationic dyeable polyester is provided by adding a third monomer (isophthalic acid containing sulfonic acid group) to provide cationic dye connection, which easily leads to an increase in the viscosity of polyester; and the use of isophthalic acid containing sulfonate groups When the copolyester obtained by modifying the dicarboxylic acid component is melt-spun, the component pressure rises too fast during spinning, and it is difficult to carry out stable production.
[0004] Patent Document JP-A-2008-31322 discloses a technology related to polycaprolactam composition, which microdisperses the white foreign matter caused by the isophthalic acid component containing sulfonate groups by using it together with a surfactant ; This method does suppress the white foreign matter derived from the isophthalic acid component containing sulfonate groups to a certain extent, but the surfactant used will also become the cause of the pressure increase of the spinning pack, so it is still necessary needs further improvement
In addition, the high pressure at the initial stage of spinning caused by the viscosity increase of the isophthalic acid component containing sulfonate groups is still a problem

Method used

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  • A kind of preparation method of cationic fiber dyeable artificial leather
  • A kind of preparation method of cationic fiber dyeable artificial leather
  • A kind of preparation method of cationic fiber dyeable artificial leather

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preparation example Construction

[0018] The preparation method of the cationic fiber dyeable artificial leather of the present invention comprises the following steps: (a) transferring the ethylene terephthalate oligomer to the polymerization reactor, adding polycondensation catalyst, isophthalic acid-5- Sodium sulfonate, Polyethylene Glycol and tensio-active agent react and make modified polyester; 1.0~3.0mol% of the dibasic acid), the content of the polyethylene glycol in the modified polyester is 0.5~2.0wt%; the general structural formula of the surfactant is (i.e. polydimethylsiloxane), whose content in the modified polyester is 0.03-0.6 mol% (relative to the dibasic acid that generates the modified polyester), and n is an integer of 50-1000; (b) using the modified polyester as the island component and alkali-soluble polyethylene terephthalate as the sea component to prepare island-fixed island-in-the-sea composite short fibers through a two-component spinning device; (c) the fixed island The island-sha...

Embodiment 1

[0022] The present embodiment provides a kind of preparation method of cationic fiber dyeable artificial leather, it comprises the following steps:

[0023] (a) Add ethylene glycol and dimethyl terephthalate (the molar ratio of the two is 2:1) to the reaction tank of the rectification tower, add cobalt acetate tetrahydrate as a transesterification catalyst, and conduct a transesterification reaction at 140°C , so that the obtained oligomer contains 500ppm of cobalt acetate tetrahydrate; then the temperature in the reaction tank is raised to 250°C, and the generated methanol is continuously rectified, and as the transesterification proceeds, terephthalic acid di Ethylene glycol ester until the transesterification reaction rate is 98%;

[0024] Add terephthalic acid and ethylene glycol in a molar ratio of 1:1.14 at 250°C to a reaction kettle (with a rectification tower) equipped with bottom material diethylene glycol terephthalate for esterification reaction. The esterification...

Embodiment 2

[0029] This embodiment provides a preparation method of cationic fiber dyeable artificial leather, which is basically the same as that in Example 1, except that the number of islands is 16, and the molar ratio of terephthalic acid to ethylene glycol is 1: 1.15, the addition of antimony trioxide is 250ppm, the addition of isophthalic acid-5-sodium sulfonate is 2.0mol%, the addition of PEG (molecular weight 2000) is 1.5wt%, surfactant (n=200 ) is added in an amount of 0.2 mol%.

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Abstract

The invention relates to a preparation method of cationic fiber dyeable artificial leather. The preparation method comprises the following steps: (a) transferring a 2-hydroxyethyl methyl terephthalateoligomer into a polyreactor, adding a polycondensation catalyst, 5-sulfoisophthalic acid monosodium salt, polyethylene glycol and a surfactant for reacting to obtain modified polyester; (b) taking the modified polyester as an island component, taking alkali-soluble polyethylene terephthalate as a sea component, and preparing figured island composite staple fibers by using double component spinning equipment; (c) lapping the figured island type island composite staple fibers and forming a non-woven fabric by carrying out cohesion processing through a needling machine; (d) carrying out polymerelastomer padding, alkali treatment, sanding, dyeing and finishing on the non-woven fabric, thus obtaining a finished product. The preparation method of the cationic fiber dyeable artificial leather has the advantages that the initial pressure of melt spinning can be reduced and the rise of the filter pressure is inhibited; the prepared fibers have excellent cationic dyeability and the artificialleather has bright color.

Description

technical field [0001] The invention relates to an artificial leather, in particular to a preparation method of cationic fiber dyeable artificial leather. Background technique [0002] At present, most of the superfine fiber artificial leather produced at home and abroad is made of nylon as the island component. Nylon has specific natural defects in light resistance, which limits the expansion of its use. The superfine fiber leather made of ordinary polyester will have obvious color migration during the dyeing process, which will greatly restrict its application. [0003] Making cationic dyeable polyester fiber into microfiber leather will be a feasible way to solve this problem. Cationic dyeable polyester is provided by adding a third monomer (isophthalic acid containing sulfonic acid group) to provide cationic dye connection, which easily leads to an increase in the viscosity of polyester; and the use of isophthalic acid containing sulfonate groups When the copolyester ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D04H1/4382D01F8/14C08G63/688C08G63/86D01D5/34
CPCC08G63/6886C08G63/866D01D5/34D01F8/14D04H1/4382D06N3/0004D06N3/0011D10B2331/02D10B2331/04
Inventor 张晓良
Owner 江苏尚科聚合新材料有限公司
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