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Preparation method of novel compound different shrinkage yarns

A different shrinkage and new type of technology, applied in the field of polyester modification, can solve the problems of poor polyester dyeing performance and difficult polyester compatibility, and achieve high bulkiness, good compatibility, and reduced migration.

Inactive Publication Date: 2019-03-01
XINFENGMING GRP HUZHOU ZHONGSHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a novel method for preparing composite differentially shrinkable yarns, which solves the problem of poor dyeing performance of polyester in the preparation process of existing differentially shrinkable composite yarns, and the problem that amino fatty acid ethylene glycol ester molecules interact with polyester incompatibility problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a novel composite differential shrinkage yarn, comprising the following steps:

[0032] A: Preparation of monomethyl dodecanedicarboxylate: Add dodecanedicarboxylic acid and methanol into the reactor at a molar ratio of 1:1.5, heat to 75°C under the catalysis of concentrated sulfuric acid, and reflux the ester chemicalization, cooling, separation and purification to obtain monomethyl dodecanedicarboxylate, wherein the concentrated sulfuric acid refers to the sulfuric acid that the mass concentration is 65%, and the concentrated sulfuric acid add-on is 2.5wt% of dodecanedicarboxylic acid;

[0033] B: Preparation of bromoundecanecarboxylic acid: Dissolve monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide in benzene, wherein monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide The molar ratio is 1:1:1, the concentration of monomethyl dodecanedicarboxylate is 0.05mol / L, under nitrogen atmosphere, react at 75°C,...

Embodiment 2

[0051] A preparation method of a novel composite differential shrinkage yarn, comprising the following steps:

[0052] A: Preparation of monomethyl dodecanedicarboxylate: Add dodecanedicarboxylic acid and methanol into the reactor at a molar ratio of 1:1.5, heat to 80°C under the catalysis of concentrated sulfuric acid, and reflux the ester chemicalization, cooling, separation and purification to obtain monomethyl dodecanedicarboxylate, wherein the concentrated sulfuric acid refers to the sulfuric acid that the mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of dodecanedicarboxylic acid;

[0053] B: Preparation of bromoundecanecarboxylic acid: Dissolve monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide in benzene, wherein monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide The molar ratio is 1:1:1, the concentration of monomethyl dodecanedicarboxylate is 0.05mol / L, under nitrogen atmosphere, react at 80°C, r...

Embodiment 3

[0070] A preparation method of a novel composite differential shrinkage yarn, comprising the following steps:

[0071] A: Preparation of monomethyl dodecanedicarboxylate: Add dodecanedicarboxylic acid and methanol into the reactor at a molar ratio of 1:1.5, heat to 85°C under the catalysis of concentrated sulfuric acid, and reflux the ester Chemicalization, cooling, separation and purification to obtain monomethyl dodecanedicarboxylate, wherein the concentrated sulfuric acid refers to the sulfuric acid that the mass concentration is 75%, and the concentrated sulfuric acid add-on is 3.5wt% of dodecanedicarboxylic acid;

[0072] B: Preparation of bromoundecanecarboxylic acid: Dissolve monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide in benzene, wherein monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide The molar ratio is 1:1:1, the concentration of monomethyl dodecanedicarboxylate is 0.05mol / L, under nitrogen atmosphere, react at 85°C,...

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Abstract

The invention discloses a preparation method of novel compound different shrinkage yarns and relates to the technical field of polyester modification. The preparation method comprises the following steps: A: preparing dimethyl dodecanedioate; B: preparing bromo-undecanecarboxylic acid; C: preparing aminoundecanecarboxylic acid; D, preparing ethylene glycol aminoundecanecarboxylate; E: preparing anesterification product; F: preparing modified polyester; G, preparing the novel compound different shrinkage yarns; H: dyeing fibers in a preparation process. According to the preparation method disclosed by the invention, the compatibility with polyester is increased through amino; the obtained fibers have good compatibility with amino fatty acid glycol ester; the amino exists in the first placein an amino fatty acid ethylene glycol ester molecule, so that a hydrogen bond interaction between the molecule and a polyester macromolecular chain is increased; the compatibility of the molecule with the polyester and the dispersion in the polyester are increased; the migration is reduced to the greatest extent; the structure regularity and crystallinity of the polyester are not damaged and good performance of the polyester is kept.

Description

technical field [0001] The invention relates to the technical field of polyester modification, in particular to a preparation method of a novel composite differential shrinkage yarn. Background technique [0002] Since its appearance, polyethylene terephthalate (PET) fiber has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fibers in the world. Polyester fiber has high breaking strength and elastic modulus. , moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance, corrosion resistance and a series of excellent properties, and the fabric has the advantages of anti-wrinkle, cost-free, and good stiffness. Therefore, polyester fiber is widely used in clothing. In the fields of home textiles and home textiles, different shrinkage composite yarns are filaments with different potential shrinkage properties. In the preparation process of existing different shr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/685C08G63/78D06P1/16D06P3/54
CPCC08G63/6856C08G63/78D01F6/84D06P1/16D06P3/54
Inventor 管永银张天明沈金良宋卫国胡军钱朋超
Owner XINFENGMING GRP HUZHOU ZHONGSHI TECH CO LTD
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