Industrial method and polycondensation reactor for continuously preparing poly-p-phenylene terephthamide resin with high viscosity

A technology of poly-p-phenylene terephthalamide and terephthaloyl chloride, which is applied in the field of continuous preparation of high-viscosity poly-p-phenylene terephthalamide resin, can solve the problem of low viscosity and environmental protection Unfavorable solvent recovery and other problems, to achieve the effect of purifying the workshop environment, simplifying the recovery process and equipment requirements, and increasing the viscosity
CN101550231AActive Publication Date: 2009-10-07中国平煤神马控股集团有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中国平煤神马控股集团有限公司
Publication Date
2009-10-07

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Abstract

The invention relates to an industrial method and a polycondensation reactor for continuously preparing poly-p-phenylene terephthamide resin with high viscosity, comprising the following steps: (1) compounding a flux into an aqueous solution, then mixing with solvent to remove water by refinement and continuously and stably obtaining a solvent system with the water content conforming to the requirement, wherein the weight percentage of the flux in the solvent system is from 6 percent to 15 percent; (2) performing the polycondensation reaction of para-phenylene diamine (PPD) and terephthalyl chloride (TPC) in the mol ratio of 1.01-1 to 1-1.01 in the solvent system prepared in the step (1), and obtaining a polymer after reaction; and (3) obtaining the poly-p-phenylene terephthamide resin in yellow powder after pulverizing, neutralizing, washing and drying the polymer. By utilizing the method, the adverse effects of weather and operation on the polymerized solvent system water is overcome, and continuous, closed and clean production is realized.
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Description

technical field

[0001] The present invention relates to a kind of industrial method for continuously preparing high-viscosity poly-p-phenylene terephthalamide resin (PPTA), especially relate to the aqueous solution of a kind of co-solvent mixed with water-containing NMP to prepare anhydrous NMP / co-solvent solution, then The industrialized method of polymerizing PPD and TPC in anhydrous solvent to prepare high-viscosity poly-p-phenylene terephthalamide resin. Background technique

[0002] Polyparaphenylene terephthalamide resin (PPTA) is the raw material for preparing aramid 1414 fiber and pulp. Because of their high strength, high modulus, high temperature resistance, flame retardant and other excellent comprehensive properties, they have been widely used in military, aerospace, sports, communication, chemical and other fields. At present, in the relevant reports of continuous preparation of poly-p-phenylene terephthalamide resin, the early patent USP3850888, 3884881 adopts...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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