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

Industrial synthesis method of high-thermal-stability terminated polysulfone resin

A high thermal stability, polysulfone resin technology, applied in the field of polymer materials, can solve the problems of increasing recycling equipment, restricting the quality of polysulfone, and high equipment costs, and achieving the effects of shortening reaction time, saving procurement costs, and reducing production costs

Inactive Publication Date: 2015-04-22
JIANGMEN YOUJU NEW MATERIALS
View PDF6 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The end-blocking agent that these technologies adopt has following defect in actual production: (1) adopt CH 3 Cl acts as a capping agent, since CH 3 Cl is gaseous at room temperature, and the temperature at the end of the polymerization reaction is higher than 200°C. In order to ensure a better end-capping effect, it is necessary to continuously feed a large amount of CH into the system. 3 Cl, while excess unreacted CH 3 Cl needs to be separated and recovered, so special recovery equipment needs to be added, and the equipment cost is high, so CH is seldom used in actual production. 3 Cl is the capping agent
[0005] It can be seen from the above that all existing end-capping agents have defects, and the existence of these defects directly restricts the quality of polysulfone

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
  • Industrial synthesis method of high-thermal-stability terminated polysulfone resin
  • Industrial synthesis method of high-thermal-stability terminated polysulfone resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In a 200-liter stainless steel reaction kettle equipped with a nitrogen pipe, a condensing water separator and a high-efficiency stirrer, first add 100.00KG N-methylpyrrolidone, then start stirring and raise the temperature to 80°C, and then add 23.30KG 4,4'- Dichlorodiphenyl sulfone, 18.67KG bisphenol A, after the monomers are completely dissolved, add 9.50KG sodium carbonate to the system when the temperature rises to 100°C, then add 9.0 liters of mesitylene, and continue stirring to raise the temperature to 180°C. The salt-forming reaction starts, the water generated in the system azeotropes with mesitylene, cooling water begins to drip from the condenser tube, and the layers are separated in the water separator. After the upper layer of mesitylene turns from turbid to clear, reflux continues for 20 minutes In order to ensure the complete salt formation reaction, the salt formation stage is 1 hour, after the salt formation is completed, the temperature is raised to 21...

Embodiment 2

[0033] Same as Example 1, except that 3-fluoro-4-chlorobenzophenone replaces 3,4′-difluorobenzophenone, tetramethylbenzene replaces mesitylene, other conditions are the same.

[0034] The resulting PSU resin melt index MI = 16.0g / 10min (343.0°C, 2.16KG, 5 minutes);

[0035] MI=15.4g / 10min (343.0°C, 2.16KG, 30 minutes).

Embodiment 3

[0037] Same as Example 1, except that 3-chloro-4-fluorobenzophenone is substituted for 3,4'-difluorobenzophenone, other conditions are the same.

[0038]The resulting PPSU resin melt index MI = 16.0g / 10min (343.0°C, 2.16KG, 5 minutes);

[0039] MI=15.4g / 10min (343.0°C, 2.16KG, 30 minutes).

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
Melt indexaaaaaaaaaa
Melt indexaaaaaaaaaa
Melt indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses an industrial synthesis method of high-thermal-stability terminated polysulfone resin. The industrial synthesis method comprises the following steps: adding a solvent into a reaction kettle under nitrogen filled protection, then increasing the temperature to 60-80 DEG C, sequentially adding 4,4-dichlorodiphenyl sulfone and bisphenol A to be used as reaction monomers, wherein the content of solid in the system is 20-40%; adding a salt forming agent after the monomers are thoroughly dissolved, subsequently adding a water dividing agent, increasing the temperature to 180-190 DEG C, and carrying out salt formation reaction for 1-2 hours; then increasing the temperature to 200-220 DEG C, carrying out constant-temperature polymerization reaction for 5-6 hours, adding a terminating agent, continuing to react for 10-30 minutes to obtain a polymerized adhesive liquid; and cooling, crushing, filtering, washing and drying the polymerized adhesive liquid to obtain polysulfone resin. The added terminating agent has an excellent terminating effect; the system is not depolymerized; the terminated polysulfone resin synthesized by the method is high in thermal stability and low in gloss; and the process can be used for greatly shortening the reaction time, improving the productivity and widening the application field of the products.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, and in particular relates to an industrial synthesis method of high thermal stability end-capped polysulfone resin. Background technique [0002] Polysulfone is a kind of high-performance engineering plastics. Because of their excellent comprehensive properties such as heat resistance, hot water resistance, creep resistance, dimensional stability, impact resistance, chemical resistance, non-toxicity and flame retardancy, Therefore, it has been widely used in the fields of electronics, electrical appliances, machinery, automobiles, medical appliances, food processing and non-stick coatings for a long time. [0003] Industrially important polysulfones include bisphenol A polysulfone (PSU) and biphenyl polyethersulfone (PPSU), both of which have high glass transition temperatures. Existing polysulfone production techniques, such as European patent document EP2008067700 and U.S. pat...

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
IPC IPC(8): C08G65/40C08G65/48
Inventor 王贤文黎昱江友飞
Owner JIANGMEN YOUJU NEW MATERIALS
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