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Preparation method of high-light-transmittance sulfone polymer and prepared sulfone polymer

A high light transmittance, polymer technology, applied in the field of sulfone polymers, can solve the problems of gel-like precipitation, poor heat resistance, light transmittance drop, etc., to reduce product haze, improve light transmittance, eliminate The effect of applying restrictions

Active Publication Date: 2020-06-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of small molecule rings will bring great defects to the product, such as easy discoloration after repeated processing, poor heat resistance, easy cross-linking, easy decomposition, and gel-like precipitation after the product dissolves, etc., which will cause Decrease in light transmittance, which is not acceptable to downstream customers who have higher requirements on raw material quality

Method used

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  • Preparation method of high-light-transmittance sulfone polymer and prepared sulfone polymer
  • Preparation method of high-light-transmittance sulfone polymer and prepared sulfone polymer
  • Preparation method of high-light-transmittance sulfone polymer and prepared sulfone polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Connect the water separator, straight condenser, thermometer, stirrer and other devices to the 1000ml four-neck flask. After replacing the device with nitrogen, add 367g of o-xylene, start stirring, add 65.843g of potassium carbonate and 90.653g of bisphenol A, and continue to maintain the nitrogen atmosphere; heat up to 144°C and reflux, and remove the water generated during the reaction from the separation Drain the system from the water tank. When no more water is discharged, the water is released, and the solvent is evaporated out of the reaction system until it is evaporated to dryness, and the temperature of the system is raised to 180°C.

[0030] Accurately weigh 114.8g of 4,4'-dichlorodiphenylsulfone, dissolve it in 402g of sulfolane saturated with nitrogen, and raise the temperature to 180°C to form a solution. Add the solution to the reaction system under the protection of nitrogen, keep the reaction at 180°C and -0.09MPa for 6 hours, the viscosity of the sys...

Embodiment 2

[0034] Connect the water separator, straight condenser, thermometer, stirrer and other devices to the 1000ml four-neck flask. After replacing the device with nitrogen, add 491g of n-nonane, start stirring, add 32.472g of sodium hydroxide and 90.288g of bisphenol A, and continue to maintain the nitrogen atmosphere; heat up to 126 ° C and reflux, and the water generated during the reaction process is removed from the Discharge the system from the water separator. When no more water is discharged, the water is released, and the solvent is evaporated out of the reaction system until it is evaporated to dryness, and the temperature of the system is raised to 185°C.

[0035] Accurately weigh 114.8g of 4,4'-dichlorodiphenylsulfone, dissolve it in 344g of sulfolane saturated with nitrogen, and raise the temperature to 185°C to form a solution. Add the solution to the reaction system under the protection of nitrogen, keep the reaction at 185°C and -0.09MPa for 8 hours, the viscosity o...

Embodiment 3

[0039] Connect the water separator, straight condenser, thermometer, stirrer and other devices to the 1000ml four-neck flask. After replacing the device with helium, add 523g of xylene, start stirring, add 43.68g of potassium hydroxide and 72.54g of 4,4'-dihydroxybiphenyl, and continue to maintain the helium atmosphere; heat up to 140°C and reflux, The water generated during the reaction is discharged from the system from the water separator. When no more water is discharged, the water is released, and the solvent is evaporated out of the reaction system until it is evaporated to dryness, and the temperature of the system is raised to 170°C.

[0040] Accurately weigh 114.8g of 4,4'-dichlorodiphenylsulfone, dissolve it in 689g of sulfolane saturated with helium, and raise the temperature to 170°C to form a solution. Add the solution to the reaction system under the protection of helium, keep the reaction at 170°C and -0.08MPa for 3 hours, the viscosity of the system reaches 50...

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Abstract

The invention provides a preparation method of a high-light-transmittance sulfone polymer and the prepared sulfone polymer. The preparation method comprises the following steps of: controlling excessive chlorobenzene sulfone raw material in a sulfone polymerization process, and grafting chlorobenzene sulfone residues to two ends of the sulfone polymer; and in the presence of an alkali metal hydroxide or carbonate, adding pentafluorophenol into the sulfone polymer for end capping to generate a pentafluorophenol-terminated sulfone polymer. The sulfone polymer prepared by the method has the advantages of low content of small molecular cyclic substances and high light transmittance.

Description

technical field [0001] The invention relates to a sulfone polymer, in particular to a preparation method of a high light transmittance sulfone polymer and the prepared sulfone polymer. Background technique [0002] Sulfone polymers mainly include polysulfone, polyphenylsulfone, polyethersulfone and characteristic sulfone polymers, etc. Its structure contains repeated ether bonds, aromatic rings and sulfone groups, which can be used under high temperature conditions. Engineering plastics have a glass transition temperature above 180°C and a long-term service temperature above 160°C. They are mainly used in water treatment, machinery, electronics, food, medical equipment and other fields. At present, the main manufacturers of sulfone polymers include Solvay, BASF, Youju New Materials, Sumitomo Chemical and other enterprises. [0003] The existing synthetic method of sulfone polymer, which is relatively mature in industry, is composed of p-dihydric phenol compound, 4,4'-dichlo...

Claims

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Application Information

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IPC IPC(8): C08G75/20C08G75/23
CPCC08G75/20C08G75/23
Inventor 张鑫邹敏仇伟陈海波屈亚青宋均成
Owner WANHUA CHEM GRP CO LTD
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