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Industrialized synthesis method of high-heat-stability blocked polyether sulfone resin

A polyarylethersulfone technology with high thermal stability, applied in the field of polymer materials, can solve the problems of high equipment cost, restricting the quality of polyarylethersulfone, and increasing recycling equipment, so as to reduce production costs, save procurement costs, and shorten the reaction time the effect of time

Active Publication Date: 2014-03-12
JIANGMEN YOUJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The end-capping agents used in these technologies have the following defects in actual production: (1) the use of CH 3 Cl acts as a capping agent, since CH 3 Cl is gaseous at room temperature, and the temperature in the later stage of the polymerization reaction is higher than 230°C. In order to ensure a better end-capping effect, it is necessary to continuously introduce 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
[0006] 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 polyarylethersulfone

Method used

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  • Industrialized synthesis method of high-heat-stability blocked polyether sulfone resin
  • Industrialized synthesis method of high-heat-stability blocked polyether sulfone 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 sulfolane and start stirring to raise the temperature to 80°C, and then add 23.30 KG 4,4'-dichlorodiphenyl Sulfone, 15.00KG 4,4'-biphenyldiol, 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, continue stirring and heat up to 200°C °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 layers are separated in the water separator. Ten minutes to ensure that the salt-forming reaction is complete, the salt-forming stage is 1 hour, and then the temperature is raised to 230°C after the salt-forming is completed, and the temperature is maintained for 1.5 hours, and 174.0g of 3,4'-difluorobenzophenone is added, and ...

Embodiment 2

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

[0034] The resulting PPSU resin melt index MI = 26.0 g / 10min (365.0°C, 5KG, 5 minutes);

[0035] MI = 25.4 g / 10min (365.0°C, 5KG, 30 minutes).

Embodiment 3

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

[0038] The resulting PPSU resin melt index MI = 26.0 g / 10min (365.0°C, 5KG, 5 minutes);

[0039] MI = 25.4 g / 10min (365.0°C, 5KG, 30 minutes).

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Abstract

The invention discloses an industrialized synthesis method of a high-heat-stability blocked polyether sulfone resin, which comprises the following steps: in a reaction kettle in a nitrogen protective atmosphere, adding a sulfolane solvent, heating to 60-80 DEG C while stirring, sequentially adding a water diversion agent, continuing heating to 200-210 DEG C while stirring, and carrying out salifying reaction for 1-2 hours; after the salifying reaction is finished, heating to 220-240 DEG C, carrying out constant-temperature polymerization reaction for 1-2 hours, adding a blocking agent, and continuing the reaction for 10-30 minutes to obtain a polymerization slurry; and cooling the polymerization slurry, pulverizing into powder, filtering, boiling and washing with deionized water to remove the solvent and byproduct salts, and drying to obtain the polyether sulfone resin. After adding the blocking agent, the polyether sulfone resin has favorable blocking effect, the system does not have the phenomenon of depolymerization, and the obtained blocked polyether sulfone resin has high heat stability; and the technique can greatly shorten the reaction time and enhance the productivity.

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-blocked polyaryl ether sulfone resin. Background technique [0002] Polyaryl ether sulfone 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, flame retardancy, etc. 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 polyarylethersulfones include polyethersulfone (PES) and biphenyl polyethersulfone (PPSU), both of which have high glass transition temperatures (~220°C). Existing polyarylethersulfones have a production process using...

Claims

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Application Information

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IPC IPC(8): C08G65/40C08G65/46
Inventor 王贤文
Owner JIANGMEN YOUJU NEW MATERIALS
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