Device and method for continuously preparing polyisophthaloyl metaphenylene diamine spinning solution

A technology of poly-m-phenylene isophthalamide spinning and poly-m-phenylene isophthalamide is applied in the directions of single-component polyamide rayon, spinning solution preparation, etc., and can solve the problem of reducing the system Apparent viscosity, increasing the temperature of the reaction system, and the uncertainty of the amount, etc., can achieve the effect of continuous and stable spinning, stable intrinsic viscosity, and narrow molecular weight distribution.

Active Publication Date: 2012-11-28
上海舟汉纤维材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the pre-polymerization stage of the method, the IPC charge is 50-80% of the total amount. This stage is the main stage for generating heat of reaction. It is not easy to quickly discharge the heat of reaction in this stage by adopting reactor type batch polymerization; Although the screw extruder is conducive to the discharge of reaction heat, the heat of reaction generated at this stage is not much. Retaining appropriate heat of reaction is conducive to raising the temperature of the reaction system, thereby reducing the apparent viscosity of the system, enhancing the eff

Method used

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  • Device and method for continuously preparing polyisophthaloyl metaphenylene diamine spinning solution
  • Device and method for continuously preparing polyisophthaloyl metaphenylene diamine spinning solution
  • Device and method for continuously preparing polyisophthaloyl metaphenylene diamine spinning solution

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Experimental program
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Effect test

Embodiment 1

[0035] After the dimethylacetamide (DMAC) solvent is conveyed by a precision gear pump and measured by a mass flow meter, it is continuously added to the No. 1 No. Quickly mix in the mixer to prepare the MPD solution. The MPD solution flows into the plate heat exchanger to cool the temperature to -10°C. The cooled MPD solution and the 185.15kg / h flow rate of isophthaloyl chloride (IPC) melt are continuous at the same time Add it into the No. 2 mixer for rapid mixing, and the mixed solution flows into the No. 1 twin-screw reactor with a screw diameter of 60mm, an aspect ratio of 30, a rotating speed of 360r / min, and a jacket temperature of -15°C. Reaction in this reactor 2min forms oligomer, and oligomer further flows into the second twin-screw reactor that screw diameter is 125mm, aspect ratio is 10, rotating speed is 150rpm, jacket temperature is 25 ℃, in this reaction React in the container for 8 minutes to form a polym-phenylene isophthalamide solution. After the solution i...

Embodiment 2

[0037]After the dimethylacetamide (DMAC) solvent is transported by a precision gear pump and measured by a mass flow meter, it is continuously added to the first No. Quickly mix in the mixer to prepare the MPD solution. The MPD solution flows into the plate heat exchanger to cool the temperature to -10°C. The cooled MPD solution and the isophthaloyl chloride (IPC) melt at a flow rate of 123.44kg / h are continuous at the same time Add it into the No. 2 mixer for rapid mixing, and the mixed solution flows into the No. 1 twin-screw reactor with a screw diameter of 60mm, an aspect ratio of 30, a rotating speed of 360r / min, and a jacket temperature of -15°C. Reaction in this reactor 3min forms oligomer, and oligomer further flows into the second twin-screw reactor that screw diameter is 125mm, length-to-diameter ratio is 10, rotating speed is 100rpm, jacket temperature is 25 ℃, in this reaction React in the container for 15 minutes to form a polym-phenylene isophthalamide solution. ...

Embodiment 3

[0039] After the dimethylacetamide (DMAC) solvent is transported by a precision gear pump and measured by a mass flow meter, it is continuously added to the No. 1 No. Quickly mix in the mixer to prepare the MPD solution. The MPD solution flows into the plate heat exchanger to cool the temperature to -10°C. The cooled MPD solution and the 185.15kg / h flow rate of isophthaloyl chloride (IPC) melt are continuous at the same time Add it into the No. 2 mixer for rapid mixing, and the mixed solution flows into the No. 1 twin-screw reactor with a screw diameter of 60mm, an aspect ratio of 30, a rotating speed of 360r / min, and a jacket temperature of -15°C. Reaction 1.8min forms oligomer in this reactor, and oligomer flows into screw rod diameter further and is that 125mm, length-to-diameter ratio are 10, rotating speed is that 150rpm, jacket temperature are in the second twin-screw reactor of 25 ℃, in this React in the reactor for 7 minutes to form a polym-phenylene isophthalamide sol...

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Abstract

The invention relates to a device and a method for continuously preparing a polyisophthaloyl metaphenylene diamine spinning solution and belongs to the field of high polymer materials. The method is characterized in that a polar solvent, m-phenylenediamine melt and m-phthaloyl chloride melt are continuously and simultaneously added into two twin-screw reactors which are connected in series in a specific proportion so as to continuously prepare the polyisophthaloyl metaphenylene diamine spinning solution. By the method, the mixing requirements at different polymerization stages can be met, and the problem of difficulty in heat radiation can be solved; the polyisophthaloyl metaphenylene diamine polymer which is prepared by a continuous production mode is narrow in molecular weight distribution and stable in intrinsic viscosity; and when the intrinsic viscosity is more than 2.0dl/g, the continuous and stable spinning requirements of polyisophthaloyl metaphenylene diamine fibers can be met.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to polymer material manufacturing technology. Specifically, it relates to a device and a preparation method suitable for industrial continuous preparation of polym-phenylene isophthalamide spinning stock solution. Background technique [0002] Poly-m-phenylene isophthalamide fiber is also called meta-aramid fiber. Meta-aramid is one of the fastest-growing varieties of high-performance fibers today. It is a high-tech fiber with excellent comprehensive performance. Clothing, honeycomb structure materials, electrical insulating paper and high-temperature filter materials have a wide range of uses, and are important basic materials in the fields of aerospace, electronics, communications, environmental protection, petrochemicals, marine development and special clothing. [0003] High-quality polym-phenylene isophthalamide polymer is an important prerequisite for preparing high-quality poly...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01F6/60C08G69/32
Inventor 刘岳新周文奎金伟
Owner 上海舟汉纤维材料科技股份有限公司
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