Continuous polymerization preparation method of flame-retardant anti-static PTT (polytrimethylene terephthalate) polyester and polyester prepared by using same

A flame retardant, antistatic, PTT technology, applied in the field of polyester, can solve the problems of complex masterbatch preparation process, etc., and achieve the effects of easy large-scale industrial production, easy continuous operation, and strong market competitiveness

Active Publication Date: 2014-04-16
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the prep

Method used

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  • Continuous polymerization preparation method of flame-retardant anti-static PTT (polytrimethylene terephthalate) polyester and polyester prepared by using same

Examples

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Embodiment 1

[0064] 1. Put terephthalic acid (PTA) and propylene glycol (PDO) into the beating kettle, add tetrabutyl titanate for beating, beat for 40 minutes, and put it into the slurry supply tank; the molar ratio of terephthalic acid and propylene glycol is 1:1.5, the amount of tetrabutyl titanate added is 0.04% of the total reactant mass;

[0065] 2. Pump the slurry obtained in step 1 into the first esterification tank to carry out the esterification reaction. The esterification temperature is 250-255°C, and the flow rate is controlled so that after passing through the first esterification tank, the esterification rate is 85-255°C. 90%; then enter the second esterification kettle, the esterification temperature is 257-260°C, and the esterification rate is controlled at 97-98%; the obtained esterified product is pumped into the pipeline, and the pipeline passes through the injector 1 and the injector 2 in turn;

[0066] 3. Melt polyethylene glycol ether with a molecular weight of 1000 ...

Embodiment 2

[0072] 1. Put terephthalic acid (PTA) and propylene glycol (PDO) into the beating kettle, add tetraethyl propyl titanate for beating, beat for 30 minutes, and put it into the slurry supply tank; the molar ratio of terephthalic acid to propylene glycol The ratio is 1:1.5; the amount of tetraethylpropyl titanate added is 0.05% of the weight of PTT polyester;

[0073] 2. Pump the slurry obtained in step 1 into the first esterification tank to carry out the esterification reaction. The esterification temperature is 245-255°C, and the flow rate is controlled so that after passing through the first esterification tank, the esterification rate is 80-255°C. 90%; then enter the second esterification reaction kettle, the esterification temperature is 255-260°C, and the esterification rate is controlled at 97-98%; the obtained esterified product is pumped into the pipeline, and the pipeline passes through the injector 1 and the injector 2 in turn;

[0074] 3. Melt PTMG in the melting tan...

Embodiment 3

[0080] 1. Put terephthalic acid (PTA) and propylene glycol (PDO) into the beating kettle, add tetrabutyl titanate for beating, after beating for 50 minutes, put them into the slurry supply tank; the molar ratio of terephthalic acid to propylene glycol 1:1.5; the amount of esterification catalyst added is 0.03% of the weight of PTT polyester;

[0081] 2. Pump the slurry obtained in step 1 into the first esterification tank to carry out the esterification reaction. The esterification temperature is 245-255°C, and the flow rate is controlled so that after passing through the first esterification tank, the esterification rate is 85-255°C. 90%; then enter the second esterification reaction kettle, the esterification temperature is 255-260°C, and the esterification rate is controlled at 96-98%; the obtained esterified product is pumped into the pipeline, and then passes through the injector 1 and the injector 2 in turn;

[0082] 3. Mix 2-hydroxyethylphenylphosphinic acid with a cont...

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Abstract

The invention relates to the field of polyesters and particularly relates to a continuous polymerization preparation method of a flame-retardant anti-static PTT (polytrimethylene terephthalate) polyester and the polyester prepared by using the same. The preparation method comprises the following steps: placing terephthalic acid and propylene glycol into a pulping kettle, adding a catalyst, pulping and placing into a pulp supply tank; pumping the pulp subjected to an esterification reaction through a first esterification kettle and a second esterification kettle into a pipeline, and enabling the pipeline to pass through an injector 1 and an injector 2 in sequence; adding an antistatic agent through the injector 1 and a flame retardant through the injector 2 into the pipeline on line; then pumping into a complete mixing kettle to mix; finally, sequentially feeding into a precondensation kettle, a final polycondensation kettle and a tackification polycondensation kettle to carry out polycondensation reaction, discharging when the intrinsic viscosity is 1.30-1.4dL/g and carrying out sized dicing to obtain the PTT polyester. The flame-retardant antistatic PTT polyester prepared by the continuous polymerization preparation method is stable in quality and suitable for large-scale industrial production, and the difference between a batch polymerization kettle and a kettle as well as the difference in the same reaction kettle are eliminated.

Description

technical field [0001] The invention relates to the polyester field, in particular to a continuous polymerization preparation method of flame-retardant and antistatic PTT polyester and the prepared polyester. Background technique [0002] Polytrimethylene terephthalate (PTT) is a new type of polyester with excellent performance. Its special structure and excellent physical and chemical properties make it widely used in textiles, engineering plastics, films and other fields. Due to the "odd carbon effect" that is different from PET and PBT due to the three methylene groups in the PTT macromolecular chain, the PTT polyester fiber can overcome the rigidity of PET and the flexibility of PBT at the same time, and has both PET and PA Advantages, such as excellent resilience, easy processing, easy dyeing and bulkiness. Therefore, it is widely used in clothing, carpets, home textiles and other fields, but PTT fiber is a flammable fiber like other polyester fibers, which is easy to ...

Claims

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Application Information

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IPC IPC(8): C08G63/692C08G63/672C08G63/78
Inventor 刘伯林金剑
Owner CHINESE TEXTILE ACAD
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