Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of polybutyrolactam through anionic ring-opening polymerization

A polybutyrolactam and anion ring-opening technology, which is applied in the field of nylon synthesis technology, can solve the problems of failing to meet the application requirements, small molecular weight of the polymer, clogged pipes, etc. The effect of cost reduction

Active Publication Date: 2019-06-07
TIANE CHEM FIBER GROUP CORP BAODING +1
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) The reaction speed of the general anionic ring-opening polymerization method is too fast to control, and the polymer condenses into hard lumps in the reactor, blocks the pipeline, and is difficult to discharge, so it cannot be applied to large-scale production
[0009] (2) Low yield
[0010] (3) For the convenience of discharging, add a large amount of hot water to stop the polymerization in the middle of the polymerization reaction. Although the problem of difficult discharging is solved, the polymer molecular weight of this method is very small, which cannot meet the application requirements
[0012] (4) Poor thermal stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of polybutyrolactam through anionic ring-opening polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The present embodiment provides a ring-opening polymerization method for synthesizing polybutyrolactam, and the specific steps are as follows:

[0049] (1) Potassium tert-butoxide activation

[0050] Add 30g of 2-pyrrolidone into a 250ml three-necked flask filled with nitrogen, stirring at a rate of 150r / min, turn off the nitrogen, vacuumize and heat to 80°C for 3 hours; turn off the vacuum and fill with nitrogen, and add 5g of t- Potassium butoxide, turn off the nitrogen again, vacuumize, and keep warm at 80°C for 2h, this is the activation solution.

[0051] (2) Initiated by carbon dioxide

[0052] Take another 500ml three-neck flask, add half of the above activation solution after feeding nitrogen gas, close the nitrogen gas and seal it well, heat it to 40°C and feed dry carbon dioxide gas, set the flow rate to 2.5L / min, feed it for 15 minutes, and stir at It is 180r / min.

[0053] (3) Add paraffin oil and sodium lauryl sulfate

[0054] Turn on the nitrogen gas ag...

Embodiment 2

[0058] This example continues to provide a kind of anionic ring-opening polymerization method synthetic polybutyrolactam, and the steps are as follows:

[0059] (1) Potassium tert-butoxide activation

[0060] Add 30 g of 2-pyrrolidone into a 250 ml three-necked flask filled with nitrogen. The stirring rate was 150r / min, the nitrogen gas was turned off, the vacuum was pumped, and the mixture was heated to 90°C for 2h. After closing the vacuum, fill with nitrogen, and add 5g of potassium tert-butoxide under the protection of nitrogen. Turn off the nitrogen gas again, evacuate, and keep warm at 90°C for 3 hours. This is the activation solution.

[0061] (2) Initiated by carbon dioxide

[0062] Take another 500ml three-necked flask, add half of the above activation solution after feeding nitrogen, close the nitrogen and seal it well, heat it to 50°C and feed dry carbon dioxide gas, set the flow rate to 3L / min, and the carbon dioxide feeding time is 10 minutes, The stirring rat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of polybutyrolactam through anionic ring-opening polymerization. The preparation method comprises potassium tert-butoxide activation, carbon dioxide triggering, and addition of paraffin oil and sodium dodecyl sulfate. 2-pyrrolidone is taken as the primary raw material, after potassium tert-butoxide activation, carbon dioxide triggering, and addition of paraffin oil and sodium dodecyl sulfate, polymerization is performed, then n-hexane is added and stirred, and suction filtration is carried out to obtain polybutyrolactam. The preparation method has the advantages that the polymerization speed is slow and controllable, the polymer discharge is convenient, the molecular weight of polymers is high, and the requirements of massive production can be met.

Description

technical field [0001] The invention relates to a nylon synthesis process, that is, a direct polymerization process of polybutyrolactam (nylon 4) with an anionic ring-opening mechanism. Background technique [0002] Polybutyrolactam 4 (PA4, commonly known as nylon 4) is a polyamide containing 4 carbon atoms in the structural unit. Due to the difference in atomic weight and structure, the melting point is between 260 °C and 270 °C, and its wear resistance and corrosion resistance are good. It has the characteristics of high strength, strong fatigue resistance and outstanding dyeing performance, and has the highest hydrophilicity among nylon resins. It is currently the only degradable nylon, mainly used for synthetic fibers, artificial leather, synthetic paper, etc. The artificial leather made of polybutyrolactam is elastic, porous, and has no static electricity; the plastic products processed by injection molding and extrusion molding have excellent performance and are widely...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/14C08G69/18
Inventor 姜珊赵鹏飞赵一甲王乐军王东兴郑宗强刘怡宁
Owner TIANE CHEM FIBER GROUP CORP BAODING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com