1,3-butanediol modified pbtptt (polybutylece terephthalate polytrimethylene terephthalate) copolymer fiber
A technology of copolymerized fiber and butanediol, which is applied in the direction of fiber chemical characteristics, single-component polyester rayon, fire-resistant and flame-retardant filament manufacturing, etc., can solve the problems of easy crystallization, small improvement of copolymerized fiber performance, poor dyeing performance, etc. problems, to achieve the effects of no corrosion of equipment, lower melting point, and high activity
Inactive Publication Date: 2010-09-15
JIANGSU YINGXIANG FIBER
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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, polyester is easy to crystallize, and the lack of hydrophilic groups can easily cause poor dyeing performance
Although the structure of PBT / PTT copolymer fiber has been improved, it presents a straight chain structure in the overall polymer main chain, and the performance of the copolymer fiber has little improvement
Method used
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Embodiment
[0020] 1. Catalyst solution configuration, catalyst sodium bisulfate and tetrabutyl titanate are added to the catalyst configuration tank, a small amount of 1,3-propanediol is injected, stirred and heated to dissolve the catalyst in 1,3-propanediol at 80°C, after dissolution The 1,3-propanediol catalyst solution enters the dilution tank, and injects the remaining 1,3-propanediol, 1,3-butanediol and butanediol. After stirring, the content of the catalyst is measured to complete the configuration of the catalyst solution.
[0021] 2. Slurry preparation, adding terephthalic acid into the slurry preparation tank according to the material ratio of diol to terephthalic acid in the ratio of 1.05 to 1.10, injecting catalyst solution, adding stabilizer, matting agent, flame retardant Agent and etherification inhibitor are stirred and mixed into a slurry, and the prepared slurry is transported to the esterification reaction device.
[0022] 3. The synthesis of the copolymerized fiber a...
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Abstract
The invention relates to a 1,3-butanediol modified PBTPTT (polybutylece terephthalate polytrimethylene terephthalate) copolymer fiber which is characterized in that the synthesis raw materials of the fiber comprise terephthalic acid, butanediol, 1,3-propylene glycol and 1,3-butanediol; the composition of two substances of sodium bisulfate and tetrabutyl titanate is used as a catalyst; and in the preparation of the fiber, the first step is to carry out an esterification reaction on the terephthalic acid and dihydric alcohols to form a prepolymer, and the second step is to carry out a condensation polymerization reaction on the prepolymer in the presence of high temperature and high vacuum.
Description
technical field [0001] The invention relates to a preparation method of modified copolymerized fibers, in particular to 1,3-butanediol modified PBTPTT copolymerized fibers, and belongs to the field of fiber copolymerized modification. Background technique [0002] In chemical fibers, polybutylene terephthalate (PBT) and propylene terephthalate (PTT) have similar structures, and are obtained by polymerization of terephthalic acid and linear dibasic fatty alcohol. Due to the regular structure of the macromolecular chain and the rigid structure of the molecular chain, polyester is easy to crystallize, and the lack of hydrophilic groups can easily cause poor dyeing performance. Although the structure of PBT / PTT copolymerized fiber has been improved, it presents a straight chain structure in the overall polymer main chain, and the performance of the copolymerized fiber has little improvement. In order to meet the needs of different purposes, other comonomers and additives can be...
Claims
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IPC IPC(8): C08G63/183C08G63/83C08G63/85D01F6/92D01F1/07D01F1/10
Inventor 徐关祥
Owner JIANGSU YINGXIANG FIBER