Device for continuously preparing high-purity polyisophthaloyl metaphenylene diamine resin solution

Abstract

The invention relates to a device for continuously preparing a high-purity polyisophthaloyl metaphenylene diamine resin solution. The device comprises a solvent metering conveying system, an m-phenylenediamine metering conveying system, an m-phthaloyl chloride metering conveying system, a double-screw mixer and a polymerization reactor, wherein the double-screw mixer is cooperated with the polymerization reactor for use; the polymerization reactor adopts a mode that materials are fed from the bottom and discharged from the upper side part; the investment cost of equipment is reduced; the polyisophthaloyl metaphenylene diamine resin solution with uniform viscosity can be continuously prepared.

Description

technical field [0001] The utility model belongs to the field of chemical machinery and relates to polymer material production equipment. Specifically, it relates to a device suitable for industrial continuous preparation of high-purity polym-phenylene isophthalamide resin solution. Background technique [0002] Poly-m-phenylene isophthalamide is also called meta-aramid fiber or aramid fiber 1313. Meta-aramid fiber is one of the fastest-growing varieties of high-performance fibers today. It is a high-tech fiber with excellent comprehensive properties. It is widely used in protective clothing, honeycomb structure materials, electrical insulating paper and high-temperature filter materials, and is an important basic material 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-qualit...

AI Technical Summary

Problems solved by technology

This method can meet the mixing requirements of different stages of polymerization and solve the problem of difficult heat dissipation. The polym-phenylene isophthalamide polymer prepared by continuous production has a narrow molecular weight distribution and a stable logarithmic viscosity. More than / g, it can meet the continuous and stable spinning requirements of polym-phenylene isophthalamide fiber; because the HCl produced in the reaction process is severely corrosive to commonly used stainless steel (such as 304, 316, etc. stainless steel), in order to reduce the damage to the equipment Corrosion, it is better to use Hastelloy or titanium alloy to make the twin-screw polymerization reactor. The twin-screw polymerization reactor itself is difficult to process, the structure is complex, and the production cost is high. The price is very expensive and the project investment is large

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