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Method for preparing 2,6-naphthalene diacid modified polyester chips

A technology of polyester chips and naphthalene dioic acid, applied in the direction of single-component polyester rayon, etc., can solve the problems of low heat shrinkage and high crystallinity, and achieve the effects of uniform dyeing, stable performance and excellent spinning performance

Inactive Publication Date: 2012-11-28
JIANGSU YINGXIANG FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Conventional polyester fibers have high crystallinity and low heat shrinkage, generally less than 10%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, on the continuous polyester equipment, the monomers of terephthalic acid (PTA), 2,6-naphthalene diacid and ethylene glycol (EG) are mixed according to the order of terephthalic acid (PTA), 2,6-naphthalene , The molar ratio of ethylene glycol (EG) monomers is 1:0.05:1.35, respectively continuously and stably metered and added to the slurry tank for beating, and silicotungstic acid and p-toluenesulfonic acid are added to the beating tank, among which silicotungsten The mol ratio of the addition of acid to terephthalic acid is 0.01%, and the mol ratio of the addition of p-toluenesulfonic acid to phthalic acid is 0.03%;

[0039] Then the above-mentioned slurry is continuously and stably transported to the reaction kettles of esterification-I, esterification-II and esterification-III, and stabilizers are continuously added to the reaction kettles of esterification-III; Polycondensation and final polycondensation to obtain a modified polyester melt; the polyester melt ...

Embodiment 2

[0043] First, on the continuous polyester equipment, the monomers of terephthalic acid (PTA), 2,6-naphthalene diacid and ethylene glycol (EG) are mixed according to the order of terephthalic acid (PTA), 2,6-naphthalene , The molar ratio of ethylene glycol (EG) monomers is 1:0.15:1.50, respectively continuously and stably metered and added to the slurry kettle for beating, and silicotungstic acid and p-toluenesulfonic acid are added to the beating kettle, among which silicotungsten The mol ratio of the addition of acid to terephthalic acid is 0.03%, and the mol ratio of the addition of p-toluenesulfonic acid to phthalic acid is 0.08%;

[0044] Then the above-mentioned slurry is continuously and stably transported to the reaction kettles of esterification-I, esterification-II and esterification-III, and stabilizers are added to the reaction kettles of esterification-III; and final polycondensation to obtain a modified polyester melt; the polyester melt is cast, pelletized, and d...

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Abstract

The invention relates to a method for preparing 2,6-naphthalene diacid modified polyester chips. The method comprises two steps of esterification and polycondensation. By the process, a melt has stable quality and the chips have high spinnability; and the prepared high-shrinkage polyester staple fibers have high shrinkage factor stability, and are uniformly dyed and low in production cost.

Description

technical field [0001] The invention relates to a modified polyester slice, in particular, the invention relates to a preparation method of a 2,6-naphthalenedioic acid modified polyester slice. Background technique [0002] As one of the three main fibers in synthetic fibers, polyester is widely used in clothing fabrics and other non-clothing fields because of its excellent physical and chemical properties. Since its inception, polyester products have also been used by downstream users as the main textile raw material to weave various textiles due to their good drapability, high strength and crispness. With the globalization of the economy and the internationalization of the market, people's requirements for clothing are getting higher and higher. Not only must they be comfortable, but they must also be functional. There is a constant need to improve performance to meet weaving requirements. [0003] In the past ten years, my country's polyester industry has developed rapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/87C08G63/82C08K5/521D01F6/92D01F1/10
Inventor 赵广兵王国柱沈家康钮真荣
Owner JIANGSU YINGXIANG FIBER
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