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Device and method for continuous preparation of particulate polyamide resin

A polyamide resin, particle-like technology, applied in chemical instruments and methods, chemical/physical/physical chemical processes, chemical/physical processes, etc., can solve the problem of limited particle size control, continuous preparation difficulties, and difficulty in ring-opening. Aggregation etc.

Active Publication Date: 2019-04-30
GS CALTEX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When a monomer containing 2-pyrrolidone is used as a raw material to prepare a polyamide resin, since 2-pyrrolidone is a 5-membered cyclic lactam, it has excellent thermal stability, and it is difficult to develop it at a temperature above the melting temperature and under high temperature conditions. Ring polymerization, which is prepared by anionic polymerization below the melting temperature. Since the prepared polyamide resin is in a solid phase state (cake type), there are difficulties in continuous production
[0005] In the past, efforts have been made to add non-reactive solvents (inert solvents) and non-reactive salts (inert salts), or to use ball mill reactors (ball mill reactors) or non-reactive structures to prevent aggregation of polyamides, thereby preparing particulate polyamides. Amides, but limited in effective particle size control

Method used

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  • Device and method for continuous preparation of particulate polyamide resin
  • Device and method for continuous preparation of particulate polyamide resin

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preparation example Construction

[0053] As an example of the present invention, a continuous preparation method of particulate polyamide resin is provided, the continuous preparation method of the above-mentioned particulate polyamide resin comprises: a step of first polymerizing monomers containing 2-pyrrolidone in a continuous reactor ; and after carrying out the above-mentioned first polymerization, the step of carrying out the second polymerization in the extrusion reactor.

[0054] The continuous production method of the above-mentioned particulate polyamide resin may further include the step of reacting the above-mentioned monomer containing 2-pyrrolidone with a catalyst in advance.

[0055] The above-mentioned 2-pyrrolidone-containing monomers can be obtained from biomass.

[0056] The above-mentioned monomer containing 2-pyrrolidone is preferably a single form of 2-pyrrolidone monomer or a mixed form of 2-pyrrolidone monomer and a lactam monomer having 5 to 7 carbon atoms, but is not limited thereto. ...

Embodiment 1

[0077] Put 4250g of 2-pyrrolidone as a monomer, put 420g of potassium hydroxide as a basic catalyst, and remove water while reacting with the catalyst for 1 hour and 30 minutes under reduced pressure at a temperature of 85°C. . Afterwards, the activated reactant was sent to a continuous stirring reactor, and 88 g of carbon dioxide initiator and 15.8 g of 1,6-hexamethylene diisocyanate were added as isocyanate compounds, and the temperature was reduced at 100° C. Under pressure conditions, the first polymerization was carried out for 1 hour. After the first polymerization, the first polymer was conveyed to a kneading extruder, and a second polymerization was performed at a temperature of 100° C. under reduced pressure for 5 hours to prepare a nylon 4 resin.

Embodiment 2

[0079] It was the same as Example 1 except that 1275 g of 2-pyrrolidone and 3955 g of ε-caprolactam were used as monomers to prepare nylon 4,6 resin.

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Abstract

The present invention relates to a continuous preparation device and method for granular polyamide resins. The continuous preparation device for granular polyamide resins includes: a continuous reactor for first polymerization of monomers containing 2-pyrrolidone; and extrusion The reactor is used for performing the second polymerization on the first polymer formed by performing the above first polymerization.

Description

technical field [0001] The invention relates to a continuous preparation device and method of granular polyamide resin. Background technique [0002] Due to carbon dioxide (CO 2 ) caused by global warming is currently a social problem. To reduce this CO2 production, bioplastics produced from biomass should be used. As we all know, since bioplastics are used, the carbon dioxide generated during the decomposition process is returned to the biomass growth, so there is no carbon dioxide emitted into the environment at all. [0003] Therefore, bioplastics are very environmentally friendly, and they are polymer raw materials that can replace non-renewable and eventually exhausted fossil raw materials, that is, petroleum, and research on the production of polyamide resins such as nylon from bioplastics is being actively carried out. [0004] When a monomer containing 2-pyrrolidone is used as a raw material to prepare a polyamide resin, since 2-pyrrolidone is a 5-membered cyclic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/24C08G69/16B01J19/00
CPCC08G69/16C08G69/18C08G69/24B01J19/00
Inventor 玄栋勋李垂贞李喜悰
Owner GS CALTEX CORP