Preparation method of poly-p-phenylene terephthamide resin

A technology of poly-p-phenylene terephthalamide and terephthaloyl chloride is applied in the preparation of poly-p-phenylene terephthalamide resin and the field of polymer materials, and can solve the problem of unstable production and measurement accuracy. Low, solid terephthaloyl chloride is easy to agglomerate and other problems, to achieve the effects of strong production stability, accurate measurement, and long production cycle

Active Publication Date: 2014-10-01
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies in the prior art, the object of the present invention is to provide a continuous preparation of polyterephthaloyl dichloride that can ef

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of p-phenylenediamine solution: Add 1000Kg of anhydrous N-methylpyrrolidone (NMP) into a 1500L jacketed stainless steel reactor, and then add 90Kg of dried anhydrous calcium chloride to it to complete the dissolution Finally, a mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is formed, and then the mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is cooled to 30°C by circulating cooling water, and then mixed to Add 43.2Kg p-phenylenediamine to the solvent system to fully dissolve it to obtain a p-phenylenediamine solution, then cool the p-phenylenediamine solution to -25°C with the help of a refrigeration unit, and set aside;

[0024] (2) Preparation of terephthaloyl chloride melt: Add terephthaloyl chloride solid powder equivalent to p-phenylenediamine into the jacketed storage tank, then pass steam into the jacketed storage tank, and p-phenylene Diformyl chloride solid powder is h...

Embodiment 2

[0028] (1) Preparation of p-phenylenediamine solution: Add 800Kg of anhydrous N-methylpyrrolidone (NMP) into a 1500L jacketed stainless steel reactor, and then add 52Kg of dried anhydrous calcium chloride to it to complete the dissolution Finally, a mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is formed, and then the mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is cooled to 30°C by circulating cooling water, and then mixed to Add 34.6Kg p-phenylenediamine to the solvent system to fully dissolve it to obtain a p-phenylenediamine solution, then cool the p-phenylenediamine solution to -15°C with the help of a refrigeration unit, and set aside;

[0029] (2) Preparation of terephthaloyl chloride melt: Add terephthaloyl chloride solid powder equivalent to p-phenylenediamine into the jacketed storage tank, then pass steam into the jacketed storage tank, and p-phenylene Diformyl chloride solid powder is he...

Embodiment 3

[0033] (1) Preparation of p-phenylenediamine solution: Add 600Kg of anhydrous N-methylpyrrolidone (NMP) into a 1500L jacketed stainless steel reactor, and then add 30Kg of dried anhydrous calcium chloride to it to complete the dissolution Finally, a mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is formed, and then the mixed solvent system of anhydrous N-methylpyrrolidone and anhydrous calcium chloride is cooled to 30°C by circulating cooling water, and then mixed to Add 26Kg of p-phenylenediamine to the solvent system to fully dissolve it to obtain a p-phenylenediamine solution, then cool the p-phenylenediamine solution to -5°C with the help of a refrigeration unit, and set aside;

[0034] (2) Preparation of terephthaloyl chloride melt: Add terephthaloyl chloride solid powder equivalent to p-phenylenediamine into the jacketed storage tank, then pass steam into the jacketed storage tank, and p-phenylene Diformyl chloride solid powder is he...

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Abstract

The invention relates to a preparation method of poly-p-phenylene terephthamide resin. The preparation method is characterized by comprising the following steps: (1) preparing a p-phenylenediamine solution; (2) preparing paraphthaloyl chloride molten mass; (3) subjecting the p-phenylenediamine solution and the paraphthaloyl chloride molten mass to a pre-polymerization reaction; (4) carrying out a condensation reaction to prepare the poly-p-phenylene terephthamide resin. The prepared poly-p-phenylene terephthamide resin powder has the advantages of high polymerization degree, uniform particle, narrow molecular weight distribution, and small repose angle. During the whole technology process, the paraphthaloyl chloride is added in a molten state, so the metering is relatively simple, the precision is high, the production stability is higher, and the production period is longer. Moreover a mixer and a pre-reactor are adopted, the thermal energy generated by the reactions can be effectively distributed to the mixer, the pre-reactor, and a double-screw reactor, thus the thermal transmission problem is solved, and the polymerization process is controllable.

Description

technical field [0001] The invention relates to a preparation method of poly-p-phenylene terephthalamide resin, in particular to a method for continuous production of poly-p-phenylene terephthalamide resin, which belongs to polymer materials, especially It is the technical field of polymer material production. Background technique [0002] Poly-p-phenylene terephthalamide (PPTA) resin is used to prepare high-strength, high-modulus, high-temperature-resistant special fibers (para-aramid) and aramid pulp with high friction resistance and high dispersibility. raw material. It can be used to make aramid fibers whose strength is 5-6 times that of steel wire, modulus 2-3 times that of steel wire, and can withstand high temperatures of 350 ° C. As an ideal substitute for asbestos, it can be made into high-temperature-resistant and friction-resistant insulating paper. , are widely used in aerospace, defense, automotive, optical cable and industrial fields. [0003] In 1972, Dupon...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G69/28
Inventor 朱福和李海明
Owner SINOPEC YIZHENG CHEM FIBER
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