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Preparation method of cationic dyeable polyester filaments

A cationic polyester and polyester filament technology, applied in the field of polyester filament, can solve environmental and human hazards, non-compliance with national environmental protection policies, methanol poisonous and other problems, to save costs, reduce the risk of environmental and human hazards, and save costs Effect

Inactive Publication Date: 2019-10-29
新凤鸣集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the SIPE prepared by this method (transesterification method) will produce methanol as a by-product. Methanol is toxic, flammable and explosive. In industrial production, accidents of fire caused by improper storage of methanol occur frequently, and this method requires Zn (AC) 2 As a catalyst to react, Zn(AC) 2 As a heavy metal, it will eventually be deposited in polyester filaments, and it will also pose a certain risk of harm to the environment and the human body, which does not comply with the national environmental protection policy.

Method used

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  • Preparation method of cationic dyeable polyester filaments

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Embodiment 1

[0023] The preparation method of a cationic dyeable polyester filament described in this embodiment specifically includes the following steps: the first step is to prepare a modified monomer solution; the second step is to prepare polyester filament;

[0024] Wherein: preparing modified monomer solution comprises the steps: step 1, see figure 1 , mix 2500kg of ethylene glycol and 1.2kg of sodium acetate into the reactor, raise the temperature to 100°C, then put in 1000kg of isophthalic acid-5-sodium sulfonate, and start the esterification reaction after raising the temperature to 180°C, and control the esterification during the reaction. The top temperature of the chemical separation tower is 98°C, and the esterification separation water is extracted from the top of the tower. When the output of water reaches 93% of the theoretical value, the reaction ends, and bishydroxyethyl isophthalate-5-sulfonic acid is prepared. Sodium (SIPE) solution.

[0025] Step 2, put the bishydrox...

Embodiment 2

[0030] The preparation method of a cationic dyeable polyester filament described in this embodiment specifically includes the following steps: the first step is to prepare a modified monomer solution; the second step is to prepare polyester filament;

[0031] Wherein: the preparation of the modified monomer solution comprises the following steps: step 1, mixing 2600kg of ethylene glycol and 2kg of sodium acetate trihydrate into the reactor, heating up to 110°C, and then dropping into 1000kg of isophthalic acid-5-sodium sulfonate, After the temperature was raised to 185°C, the esterification reaction began. During the reaction, the temperature at the top of the esterification separation tower was controlled at 99°C, and the esterification separation water was extracted from the top of the tower. When the output of water reached 92% of the theoretical value, the reaction ended. A bishydroxyethyl isophthalate-5-sodium sulfonate (SIPE) solution was prepared.

[0032] Step 2, put t...

Embodiment 3

[0037]The preparation method of a cationic dyeable polyester filament described in this embodiment specifically includes the following steps: the first step is to prepare a modified monomer solution; the second step is to prepare polyester filament;

[0038] Wherein: the preparation of the modified monomer solution includes the following steps: Step 1, mix 2800kg of ethylene glycol and 1.9kg of calcium acetate into the reactor, heat up to 105°C, then drop in 1000kg of isophthalic acid-5-sodium sulfonate, and heat up After reaching 184°C, the esterification reaction begins. During the reaction, the temperature at the top of the esterification separation tower is controlled at 98°C, and the esterification separation water is extracted from the top of the tower. When the output of water reaches 91% of the theoretical value, the reaction ends, and the preparation A solution of sodium bishydroxyethyl isophthalate-5-sulfonate (SIPE) was obtained.

[0039] Step 2, put the bishydroxye...

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Abstract

The invention relates to the technical field of polyester filaments, in particular to a preparation method of cationic dyeable polyester filaments. The preparation method comprises the following steps: firstly, adding ethylene glycol and an anti-ether agent to a reactor for stirring, and adding isophthalic acid-5-sodium benzene sulfonate after heating for a direct esterification reaction, judgingthe reaction endpoint on the basis of yield of esterified water, and adding ethylene glycol and sodium acetate trihydrate after the reaction for blending to prepare a solution of SIPE (sodium 5-sulfodimethyl isophthalate), namely, a modified monomer solution; adding the solution of modified monomers to an oligomer, performing pre-polycondensation and final polycondensation reaction to obtain modified polyester melt, and preparing the cationic dyeable polyester filaments with a spinning process. The preparation method has short flow and few procedures, cannot produce toxic, flammable and explosive methanol in the process of preparing the modified monomer solution, and is environmentally friendly; besides, no heavy metal catalyst is used in the reaction process, so that the cost is saved, and the risk of harm to the environment and human body is reduced.

Description

technical field [0001] The invention relates to the technical field of polyester filaments, in particular to a preparation method of cationic dyeable polyester filaments. Background technique [0002] Polyester, namely polyethylene terephthalate, is a crystalline polymer. Because of its excellent mechanical properties, heat resistance and chemical stability, it is widely used in clothing, bedding, various decorative fabrics and other fields. However, since polyester fiber does not contain hydrophilic groups, the dyeing rate of water-soluble dyes is extremely low, and it is prone to uneven and unstable dyeing during the dyeing process, which not only increases the cost of dyeing, but also increases the amount of dye wastewater. emission. Therefore, preparing a monomer to modify polyester filaments and preparing polyester filaments that are easy to dye with dyes has become a research direction in this field. [0003] Chinese patent 201710800182.4: Use dimethyl isophthalate-5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/688C07C303/32C07C309/58
CPCC07C303/32C08G63/6886D01F6/84C07C309/58
Inventor 庄耀中郭佳佳余宗哲李国平赵春财崔利郑伟张孟丽付明
Owner 新凤鸣集团股份有限公司
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