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A kind of low chlorine content capped sulfone polymer and its preparation method and application

A technology of polymer and chlorine content, applied in the field of special engineering plastics, can solve the problems such as the inability to meet the low halogen content requirements of electronic appliances, and achieve the effects of molecular chain stability, high thermal stability, and improved end-capping effect.

Active Publication Date: 2021-07-02
江西金海新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chlorine content of commercially available sulfone polymer materials is about 3000ppm, which generally cannot meet the low halogen content requirements of electronic appliances.

Method used

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  • A kind of low chlorine content capped sulfone polymer and its preparation method and application
  • A kind of low chlorine content capped sulfone polymer and its preparation method and application
  • A kind of low chlorine content capped sulfone polymer and its preparation method and application

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preparation example Construction

[0055] The preparation method of a kind of low chlorine content capped sulfone polymer of the present invention comprises the following steps:

[0056] (1) Salt formation reaction: under a protective atmosphere, add dihydroxy aromatic monomer (HO-Ar-OH) and dichlorodiphenyl sulfone monomer, then add solvent, stir and heat up until the monomer dissolves until the solution is transparent, Then add salt forming agent (alkali metal carbonate M 2 CO 3 ), then add xylene, continue to stir and heat up to the beginning of the salt-forming reaction, the water produced in the system and the azeotrope generated by xylene are blown out by the protective gas into the condensation tube, condensed and dripped to the water separator for stratification, the upper layer Xylene was returned to the system again when the collected water yield was close to the theoretical value, it was proved that the salt formation was complete, and then distilled and emitted xylene, the salt formation reaction w...

Embodiment 1

[0063] In this embodiment, a method for preparing a low-chlorine-content end-capped sulfone polymer comprises the following steps:

[0064] (1) Salt-forming reaction: Add 125.15g (0.5mol) of 4,4'-dihydroxydiphenyl to a three-necked flask equipped with a thermometer, a nitrogen pipe, a condensing water separator, and a stirrer in sequence according to the ratio in Table 1 Sulfone and 147.17g (0.5125mol) 4,4'-dichlorodiphenyl sulfone, then add 426g solvent sulfolane, stir and heat up to 80°C to dissolve the monomer until the solution is transparent, add 55.65g sodium carbonate, then add 80mL xylene, Continue to stir and raise the temperature to 140°C to start the salt-forming reaction. The azeotrope formed by the water and xylene produced in the system is blown out by the protective gas into the condenser tube to condense and drop to the water separator for stratification, and the xylene in the upper layer flows back to In the system; keep the temperature in the range of 200°C-2...

Embodiment 2

[0073] In this embodiment, a method for preparing a low-chlorine-content end-capped sulfone polymer comprises the following steps:

[0074] (1) Salt-forming reaction: Add 125.15g (0.5mol) of 4,4'-dihydroxydiphenyl to a three-necked flask equipped with a thermometer, a nitrogen pipe, a condensing water separator, and a stirrer in sequence according to the ratio in Table 1 Sulfone (bisphenol S) and 143.72g (0.5005mol) 4,4'-dichlorodiphenyl sulfone, then add 426g sulfolane solvent, stir and heat up to 80°C to dissolve the monomer until the solution is transparent, add 55.65g sodium carbonate, and then Add 80mL of xylene, continue to stir and raise the temperature to 140°C to start the salt-forming reaction. The azeotrope formed by the water produced in the system and xylene is blown out by the protective gas into the condenser, condensed and dropped to the water separator for stratification. Xylene refluxes into the system again; maintain the temperature in the range of 200°C-210...

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Abstract

The invention discloses a low-chlorine-content end-capped sulfone polymer and its preparation method and application, which belong to the technical field of special engineering plastics. The invention first obtains after the polymerization reaction is completed under the premise of excessive dichloro-based aromatic monomers. The polymer is chlorine-terminated, and sodium methoxide solid is added, and the methoxy anion and the chlorine terminal undergo a nucleophilic substitution reaction to generate a methoxyl terminal group, so that the end of the molecular chain is extremely low-chlorine or chlorine-free. It meets the requirements of sulfone polymers with low chlorine content, and at the same time, its molecular chain is more stable, its heat resistance is better, and the end-capping effect is improved, so as to achieve the purpose of improving the stability of the material. Compared with the prior art, the present invention adds methyl chloride gas, has a more thorough reaction degree, and makes the residual Cl of the product ‑ The end group content is lower, and according to the required Cl ‑ The amount of end group content can be flexibly controlled.

Description

technical field [0001] The invention belongs to the technical field of special engineering plastics, and relates to a low-chlorine-content capped sulfone polymer and a preparation method and application thereof. Background technique [0002] Sulfone polymer is a special high-temperature-resistant transparent thermoplastic engineering plastic with outstanding thermal properties, excellent chemical resistance, excellent high-temperature creep resistance, excellent dimensional stability, extremely low smoke and toxic gas emissions, and superior durability Hot water and superheated steam, good electrical performance, mainly including three types of polysulfone PSU, polyethersulfone PES and polyphenylsulfone PPSU. It has been developed for more than 50 years since it was developed in the 1970s. With the improvement of material development, its application scope is becoming wider and wider, including food hygiene, medical equipment, small household appliances, aerospace, electroni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08L81/06
CPCC08G75/20C08L81/06
Inventor 李春亚李太菲丁玉堂杨伟
Owner 江西金海新能源科技有限公司
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