Preparation method of 1,3-butanediol modified PBTPET (Polybutylece Terephthalate Polyethylene Terephthalate) copolymer fiber

A technology of copolymerized fibers and butanediol, applied in the manufacture of fire-retardant and flame-retardant filaments, single-component polyester rayon filaments, etc., can solve the problems of easy crystallization, lack of hydrophilic groups, poor dyeing performance, etc. The effect of increasing viscosity

Inactive Publication Date: 2010-09-08
JIANGSU YINGXIANG FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the regular structure of the macromolecular chain and the rigid structure of the molecular chain, the three polyesters are easy to crystallize, and lack of hydrophilic groups can easily cause poor dyeing performance

Method used

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  • Preparation method of 1,3-butanediol modified PBTPET (Polybutylece Terephthalate Polyethylene Terephthalate) copolymer fiber
  • Preparation method of 1,3-butanediol modified PBTPET (Polybutylece Terephthalate Polyethylene Terephthalate) copolymer fiber
  • Preparation method of 1,3-butanediol modified PBTPET (Polybutylece Terephthalate Polyethylene Terephthalate) copolymer fiber

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Embodiment

[0021] Catalyst solution configuration: add the catalyst p-toluenesulfonic acid and stannous chloride to the catalyst configuration tank, inject a small amount of ethylene glycol, stir and heat to dissolve the catalyst in ethylene glycol at 100°C, and the dissolved ethylene glycol catalyst solution Into the dilution tank, inject the remaining ethylene glycol, 1,3-butanediol and butanediol. After stirring, the content of the catalyst is measured to complete the configuration of the catalyst solution.

[0022] Slurry configuration: Add terephthalic acid into the slurry configuration tank according to the material ratio of diol to terephthalic acid at a ratio of 1.10 to 1.15, inject catalyst solution, add stabilizer, matting agent, flame retardant, The etherification inhibitor is stirred and mixed into a slurry, and the prepared slurry is transported to the esterification reaction device.

[0023] The synthesis of the copolymerized fiber adopts a continuous polyester production ...

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Abstract

The invention relates to a preparation method of a 1,3-butanediol modified PBTPET (Polybutylece Terephthalate Polyethylene Terephthalate) copolymer fiber. The preparation method is characterized in that raw materials for fiber synthesis comprise terephthalic acid, butanediol, ethylene glycol and 1,3-butanediol; and the combination of p-toluenesulfonic acid and stannous chloride is used as a catalyst. The preparation method comprises the following steps of: (1) carrying out an esterification reaction on the terephthalic acid and dihydric alcohol to form a prepolymer; and (2) carrying out a condensation polymerization reaction on the prepolymer in the presence of high temperature and high vacuum. Compared with a PBT/PET copolymer fiber, the prepared 1,3-butanediol modified copolymer fiber has higher inherent viscosity and lower terminal carboxyl group number, and the dye-uptake of the modified fiber is also obviously improved.

Description

technical field [0001] The invention relates to a preparation method of a modified copolymer fiber, in particular to a preparation method of a 1,3-butanediol modified PBTPET copolymer fiber, and belongs to the field of fiber modification and synthesis. Background technique [0002] In chemical fibers, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and propylene terephthalate (PTT) have similar structures, and through terephthalic acid and linear Polymerization of dibasic fatty alcohols. The three polyesters are easy to crystallize due to their regular macromolecular chain structure and rigid molecular chain structure, and lack of hydrophilic groups can easily cause poor dyeing performance. In order to meet the needs of different purposes, other comonomers and additives can be added in the polymerization process to improve the properties of polyester fibers. Contents of the invention [0003] The purpose of the present invention is to utilize 1,3-butan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/87C08G63/85D01F6/92D01F1/07D01F1/10
Inventor 徐关祥
Owner JIANGSU YINGXIANG FIBER
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