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Color-fixing polyester and preparation method thereof

A technology of polyester and color properties, applied in the field of color-fixing polyester and its preparation, can solve problems such as unstable color and achieve stable color

Active Publication Date: 2013-05-22
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The colored island-fixed sea-island composite superfine fiber produced with ordinary PET and colored masterbatch has unstable color. The main reason is that the sea component alkali-soluble polyester has strong coloring property. Migration of coloring dyes within the component leads to

Method used

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  • Color-fixing polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix purified terephthalic acid and ethylene glycol at a molar ratio of 1.2:1 for beating, add 0.025% of antimony trioxide, 0.016% of tripotassium phosphate and 0.0015% of cobalt acetate, which account for the weight of color-fixing polyester, and mix After uniformity, it is sent to the esterification tank for esterification reaction; the product of the esterification reaction is sent to the polycondensation tank, and then 0.8% of the weight of the color-fixing polyester is added. Polyethylene glycol with an average molecular weight of 4000 is mixed and polymerized reaction. In the low vacuum stage of the polymerization reaction, the temperature was controlled at 248° C. for 2 hours, and in the high vacuum stage of the polymerization reaction, the temperature was controlled at 275° C. for 3 hours. After the reaction is finished, the obtained polymer is pressed out from the kettle and granulated to obtain the obtained polymer.

[0014] The color-fixing polyester prepared...

Embodiment 2

[0016] Mix purified terephthalic acid and ethylene glycol at a molar ratio of 1.3:1 for beating, add 0.023% of antimony trioxide, 0.0165% of tripotassium phosphate and 0.0017% of cobalt acetate to the weight of color-fixing polyester, and mix After uniformity, it is sent to the esterification tank for esterification reaction; the product of the esterification reaction is sent to the polycondensation tank, and then 0.7% of the weight of the color-fixing polyester is added. Polyethylene glycol with an average molecular weight of 5000 is mixed and polymerized reaction. In the low vacuum stage of the polymerization reaction, the temperature was controlled at 249° C. for 1.5 hours, and in the high vacuum stage of the polymerization reaction, the temperature was controlled at 276° C. for 3.75 hours. After the reaction is finished, the obtained polymer is pressed out from the kettle and granulated to obtain the obtained polymer.

[0017] The color-fixing polyester prepared in this e...

Embodiment 3

[0019] Mix purified terephthalic acid and ethylene glycol at a molar ratio of 1.5:1 for beating, add 0.025% of antimony trioxide, 0.0175% of tripotassium phosphate and 0.002% of cobalt acetate, which account for the weight of color-fixing polyester, and mix After uniformity, it is sent to the esterification tank for esterification reaction; the product of the esterification reaction is sent to the polycondensation tank, and then 0.5% of the weight of the color-fixing polyester is added. Polyethylene glycol with an average molecular weight of 7000 is mixed and polymerized reaction. In the low vacuum stage of the polymerization reaction, the temperature was controlled at 250° C. for 1 hour, and in the high vacuum stage of the polymerization reaction, the temperature was controlled at 278° C. for 2 hours. After the reaction is finished, the obtained polymer is pressed out from the kettle and granulated to obtain the obtained polymer.

[0020] The color-fixing polyester prepared ...

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Abstract

The invention relates to color-fixing polyester which is prepared through the copolymerization of pure terephthalic acid and ethylene glycol used as basic materials. The color-fixing polyester also contains polyethyleneglycol which accounts for 0.5-0.8wt% of the color-fixing polyester and has an average molecular weight of 4000-8000. The preparation method comprises the following steps: mixing the pure terephthalic acid and the ethylene glycol according to a mol ratio of (1.2-1.5):1, pulping, adding a catalyst and assistants, and evenly mixing; then feeding into an esterification kettle, and performing esterification reaction; and feeding the esterification product into a polycondensation kettle, adding the polyethyleneglycol which has a molecular weight of 4000-8000, and performing polymerization reaction, wherein the amount of the polyethyleneglycol accounts for 0.5-0.8wt% of the color-fixing polyester. When a color-fixing polyester / coloring master batch blended molten mass and an alkali-soluble polyester molten mass are subjected to island-in-sea composite spinning, dye in island components can not migrate to sea components, and the color is stable; and figured island-in-sea composite ultrafine short fibers can not be subjected to alkali weight reduction in the subsequent product processing course.

Description

technical field [0001] The invention relates to a color-fixing polyester and a preparation method thereof. When the polyester and the colored masterbatch are blended and melted, and the melt melted by the alkali-soluble polyester is used for color-fixed-island-sea-island composite spinning, the color can be maintained. It does not migrate and has stable color, and belongs to the technical field of polyester chemical industry. Background technique [0002] In the production process of clothing fabrics and microfiber leather, it is often necessary to use colored fibers to make the product or a specific part of the product appear in a certain color, so as to play a role of beauty or identification. The colored island-fixed sea-island composite superfine fiber produced with ordinary PET plus coloring masterbatch has unstable color. The main reason is that the sea-component alkali-soluble polyester has strong coloring property. Migration of coloring dyes within the component cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672D01F8/14
Inventor 浦金龙
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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