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A device for preparing polyamide 5x, a final polymerization method, and production equipment and methods for 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: 2017-07-28
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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  • A device for preparing polyamide 5x, a final polymerization method, and production equipment and methods for polyamide 5x
  • A device for preparing polyamide 5x, a final polymerization method, and production equipment and methods for polyamide 5x
  • A device for preparing polyamide 5x, a final polymerization method, and production equipment and methods for polyamide 5x

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0091] Configuration pH is the 56 salt solution of 65% concentration of 8.05, carries out polymerization according to the condition of implementing 1 through the production equipment of described polyamide 5X, but the pressure of still body is adjusted to 180mmHg A, and output improves 20% compared with embodiment 1 %, to obtain slices with a relative viscosity of 69.7 and an 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. The relative viscosity obtained was 56.1 slices, and its amino terminal content was 42.6.

[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 a device and method for preparing polyamide 5X. The device is a final polymerization device, comprising: a final polymerization tank; an extrusion cylinder connected to the final polymerization tank; a conveying screw arranged in the an extrusion cylinder; and a frame agitator, which is arranged in the final polymerization tank and connected with the conveying screw; wherein, the frame agitator includes a stirring frame and a ribbon connected with the stirring frame. The device for preparing polyamide 5X of the present invention continuously scrapes the kettle wall through the through hole arranged on the side wall of the stirring frame, thereby reducing the formation of gel; at the same time, the material can flow on both sides of the stirring frame through the through hole , enhance the stirring effect, make the material mix evenly, the molecular weight uniformity of the polymer obtained by the final polymerization reaction is good, and at the same time, it can make the gas-liquid separation effect in the system better, which is beneficial to the final polymerization reaction. The present invention further provides a polyamide 5X production equipment and method.

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, Differential thermal analysis of high polymers. III. Polyamides, Journal of Polymer Science Vol. 50 No. 153, Pages 87-98, March 1961) describes the thermal polycondensation method, however, according to It is reported that the polyamide produced by the heating polycondensation method has a lower melting point and deteriorates heat resistance than the interfacial polycondensation method (J. Polym. Sci. 50, 87, 1961; Macromolecules, 30, 8540, 1998). However, the interfacial polycondensation process is very complicated and difficult to apply in in...

Claims

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Application Information

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Patent Type & Authority Patents(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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