Apparatus and final polymerization for preparing polyamide 5X, and production equipment and method of polyamide 5X

A polyamide and final polymerization device technology, applied in chemical instruments and methods, chemical/physical/physicochemical processes, chemical/physical processes, etc., can solve problems such as after-condenser description, achieve good molecular weight uniformity, gas-liquid Good separation effect and enhanced stirring effect

Active Publication Date: 2015-11-25
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: CN1289571C discloses a device connected to prepare polyamide 66, but does not describe the post-condenser in any detail

Method used

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  • Apparatus and final polymerization for preparing polyamide 5X, and production equipment and method of polyamide 5X
  • Apparatus and final polymerization for preparing polyamide 5X, and production equipment and method of polyamide 5X
  • Apparatus and final polymerization for preparing polyamide 5X, and production equipment and method of polyamide 5X

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Configuration pH is 7.95 the 56 salt solutions of 65% concentration, carry out polymerization according to the condition of table 1 by the production equipment of described polyamide 5X, the kettle body pressure is 210mmHgA, obtain the slice that relative viscosity is 68.9, and its terminal amino content is 40.4.

Embodiment 2

[0091] Configuration pH is 8.05 the 56 salt solutions of 65% concentration, carry out polymerization according to the condition of implementation 1 through the production equipment of polyamide 5X described, but the pressure of kettle body is adjusted to 180mmHgA, and the output is improved 20% compared with embodiment 1 , to obtain slices with a relative viscosity of 69.7 and a terminal amino group content of 40.1.

Embodiment 3

[0093] Except that the pressure in the still body was changed to 216mmHgA, other conditions were the same as in Example 2, and the output was also the same, and the slices with a relative viscosity of 56.1 and an amino terminal content of 42.6 were obtained.

[0094] Table 1 shows the relevant experimental data of prepared PA56 (polyamide 56):

[0095] Table 1

[0096]

[0097]

[0098] Unless otherwise defined, the terms used in the present invention have meanings commonly understood by those skilled in the art.

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Abstract

The present invention provides an apparatus and a method for preparing a polyamide 5X. The apparatus is a the final polymerization apparatus comprising a final polymerization kettle, an extrusion cylinder connected with the final polymerization kettle, a conveying screw arranged in the extrusion cylinder, and a frame-type agitator arranged in the final polymerization kettle and connected to the conveying screw. The frame-type agitator comprises a stirring frame and a screw band connected with the stirring frame. The apparatus for preparing polyamide 5X employs the through holes in the side wall of the stirring frame to constantly scrape the kettle wall, thereby reducing the formation of gels; while the materials can flow on the inner and outer sides of the stirring frame through the through holes, so as to enhance the stirring effect, evenly mix the materials and reach good molecular weight uniformity of the polymer obtained by the final polymerization; and the apparatus realizes good gas-liquid separation in the system, and helps the final polymerization reaction. The invention further provides production equipment and method of polyamide 5X.

Description

technical field [0001] The invention relates to a device and method for preparing polyamide, in particular to a device for preparing polyamide 5X, a final polymerization method, and production equipment and method for polyamide 5X. Background technique [0002] In the prior art, polyamide polymerization methods can generally be classified into thermal polycondensation or interfacial polycondensation. For example: (BaconKe, A.W.Sisko, Differentialthermalanalysisofhighpolymers.III.Polyamides, JournalofPolymerScience, Volume 50, No. 153, Pages 87-98, March 1961) records the heating polycondensation method, however, according to the report, the heating polycondensation method is compared to the interface In the polycondensation method, the polyamide produced has a low melting point and deteriorated heat resistance (J. Polym. Sci. 50, 87, 1961; Macromolecules, 30, 8540, 1998). However, the interfacial polycondensation process is very complicated and difficult to apply in industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/46C08G69/26B01J19/00
Inventor 秦兵兵郑毅刘驰刘修才
Owner CATHAY R&D CENT CO LTD
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