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Cation dye normal pressure deep dyeing estercopolymer and its preparing method

A cationic dye, atmospheric pressure deep dyeing technology, applied in the field of cationic dye atmospheric pressure deep dyeing copolyester and its preparation, can solve the problems of small dosage, inability to use as masterbatch, inconvenient industrial production, etc., and achieve anti-pilling The effects of improved performance, increased uniformity, and reduced raw material costs

Inactive Publication Date: 2006-03-22
洛阳高新技术开发区南峰聚酯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of the copolyester isophthalic acid sulfonic acid component (component B) in the CN1383437A announcement is 2-3 mol%, and the polyalkylene glycol component (component A) is 9-13% by weight. The dosage is small, so it cannot be used as a masterbatch
The disadvantage of this method is that the transesterification method needs to use dimethyl terephthalate as a raw material. At present, most of the raw material production plants are terephthalic acid, and it is inconvenient to use dimethyl terephthalate as a raw material for industrial production.

Method used

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  • Cation dye normal pressure deep dyeing estercopolymer and its preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] It adopts semi-continuous polyester polymerization equipment with an annual output of 5000T. Put 95% PTA, 5% PIA, 1.23mol (relative to PTA) EG into the beating tank, add 3 / 10,000 catalyst (relative to PTA), and 1.5 / 10,000 stabilizer (relative to PTA). Continuously enter the esterification tank, and control the temperature of the esterification tank to be 250-260°C. After the esterification rate reaches 90%, it is introduced into the depolymerization kettle, the oligomer is depolymerized, and then the SIPM ethylene glycol solution equivalent to 5% by weight of PTA is added into the polycondensation kettle for polymerization reaction, and the temperature in the polycondensation kettle is controlled at 270- At 280°C, under the action of the EG steam jet pump, the vacuum degree is less than 50Pa, and the copolyester has an intrinsic viscosity of 0.600dl / g and a Tm of 250°C.

Embodiment 2

[0024] Using semi-continuous polyester polymerization equipment, put 95% PTA, 5% DDA, 1.23mol (relative to PTA) EG in the beating tank, add catalyst 3 / 10,000 (relative to PTA), stabilizer 1.5 / 10,000 (relative to PTA) PTA). Continuously enter the esterification tank, after esterification, add SIPM ethylene glycol solution equivalent to 7% by weight of PTA and introduce it into the polycondensation tank for polymerization reaction to obtain a copolyester with intrinsic viscosity of 0.550dl / g and Tm=245°C.

Embodiment 3

[0026] Using semi-continuous polyester polymerization equipment, put 95% PTA, 5% DDA, 1.23mol (relative to PTA) EG in the beating tank, add catalyst 3 / 10,000 (relative to PTA), stabilizer 1.5 / 10,000 (relative to PTA) PTA). Continuously enter the esterification tank, after esterification, add SIPM ethylene glycol solution equivalent to 10% by weight of PTA, and introduce it into the polycondensation tank for polymerization to obtain a copolyester with an intrinsic viscosity of 0.500 and a Tm of 220°C.

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Abstract

The present invention is one kind of copolyester capable of being deeply dyed with cationic dye at normal pressure and its preparation process. The copolyester may be blended with common PET to obtain fiber capable of being deeply dyed with cationic dye at normal pressure. The copolyester has main repeated units of glycol phthalate and has acid components including polybasic carboxylic acid in 5-10 wt%, sulfo isophthalate in 5-18 wt% and polyalkylene diol or alphatic binary acid or its derivative in 4-10 wt%. The copolyester is prepared through semi-continuous process, including continuous esterification and intermittent polymerization. The copolyester is one kind of modified cationic dyeable polyester and may be blended into composite fiber with improved air permeation, hydroscopicity and dyeing property and suitable for various kinds of fabric.

Description

Technical field [0001] The invention relates to a modified cationic dyeable polyester, and mainly relates to a cationic dye normal pressure deep dyed copolyester and a preparation method thereof. The fluidity and spinnability of the prepared copolyester blended with ordinary PET can meet the requirements, and can be deeply dyed with cationic dyes under normal pressure, which changes the deficiency that PET can only be dyed with disperse dyes under high temperature and high pressure. Background technique [0002] Ordinary polyester macromolecules have a regular chemical structure, are easy to crystallize, have a large degree of crystallinity, and have a high degree of orientation. It is difficult for dyes to enter the amorphous region of the fiber, and polyester macromolecules do not have dyeing seats, resulting in poor dyeability. Only the copolyester formed after modification can fundamentally solve the dyeing problem of polyester fiber. [0003] "Modified polyester and it...

Claims

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Application Information

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IPC IPC(8): C08G63/183D06P1/00D06P3/52
Inventor 焦毅梁建武赵喜哲韦金红
Owner 洛阳高新技术开发区南峰聚酯有限公司
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