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Weather-proof self-cleaning transparent material and preparation method thereof

A transparent material and self-cleaning technology, applied in the field of weather-resistant self-cleaning transparent materials and their preparation, can solve the problems of poor mechanical strength, lack of processability of common polymers, high price, etc.

Inactive Publication Date: 2009-12-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although fluorine-containing materials have many excellent properties, their expensive price limits the use of such materials only in special occasions
And this kind of polymer lacks the easy processability of ordinary polymers, poor mechanical strength, low transparency, and poor compatibility with other polymer materials

Method used

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  • Weather-proof self-cleaning transparent material and preparation method thereof
  • Weather-proof self-cleaning transparent material and preparation method thereof
  • Weather-proof self-cleaning transparent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Mix 0.1 mol of terephthalic acid, 0.16 mol of ethylene glycol and 0.01 mol of 2,3,5,6-tetrafluoroterephthalic acid into the reaction vessel, start stirring and heat up to 240-250 °C, and the system pressure is controlled At 0.3 MPa, the reaction time was 3 hours. After the esterification reaction is completed, add Sb(Ac) 3 , its concentration is about 400ppm, be warming up to 250~265 ℃, the system pressure is reduced to less than 1KPa, and the reaction time is 2 hours, and then the temperature is raised to 265~280 ℃, and the system pressure is reduced to less than 30Pa, and the reaction is performed for 2 hours. After finishing the reaction, when the reaction system is lowered to room temperature, the final product is extruded, diced and dried to prepare polyester chips, and heated and pressed in a vacuum laminator to prepare the final film material. The reaction formula is as follows:

[0023]

Embodiment 2

[0024] Example 2 Mix 0.1mol succinic acid, 0.18mol butanediol and 0.02mol 3,4,5,6-tetrafluorophthalic acid into the reaction vessel, start stirring and heat up to 230-240°C, the system pressure is controlled at 0.3MPa, the reaction time is 4 hours. After the esterification reaction, add Sb(Ac) 3 , its concentration is about 400ppm, be warming up to 240~255 ℃, the system pressure is reduced to less than 1KPa, and the reaction time is 3 hours, and then the temperature is raised to 255~270 ℃, and the system pressure is reduced to less than 30Pa, and the reaction is performed for 3 hours. After finishing the reaction, when the reaction system is lowered to room temperature, the final product is extruded, diced and dried to prepare polyester chips, and heated and pressed in a vacuum laminator to prepare the final film material. The reaction formula is as follows:

[0025]

Embodiment 3

[0026] Example 3 Mix 0.1 mol of terephthalic acid, 0.2 mol of ethylene glycol and 0.03 mol of 4-(trifluoromethyl)phthalic acid into the reaction vessel, start stirring and heat up to 240-250 °C, and control the system pressure at 0.3 MPa, the reaction time was 3 hours. After the esterification reaction finishes, add tetraisopropyl titanate, its concentration is about 50ppm, be warming up to 250~265 ℃, the system pressure is reduced to less than 1KPa, and the reaction time is 3 hours, and then the temperature is raised to 265~280 ℃, The system pressure was reduced to less than 30Pa, and the reaction was carried out for 3 hours. After finishing the reaction, when the reaction system is lowered to room temperature, the final product is extruded, diced and dried to prepare polyester chips, and heated and pressed in a vacuum laminator to prepare the final film material. The reaction formula is as follows:

[0027]

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Abstract

The invention relates to a weather-proof self-cleaning transparent material and a preparation method thereof. A novel polymer with polyester and fluorinated block by adopting the way of introducing fluorine atom or fluorine-containing group monomer to a benzene ring and carrying out direct esterification and then copolycondensation on binary acid and dibastic alcohol, and controlling the ratio, temperature, pressure and catalyst of the system reactant. The preparation line has cheap and available raw materials, mild reactive condition, simple and convenient operation, and the novel material has outstanding weather-proof performance and excellent self-cleaning and photopermeability, and can be widely used in fields of photology, thermal electricity generation and the like.

Description

technical field [0001] The invention relates to a weather-resistant self-cleaning transparent material and a preparation method thereof. The material is a new type of polymer with polyester and fluorine-containing blocks, which is synthesized by block polymerization. This material has excellent weather resistance and good self-cleaning and light transmission capabilities, and can be widely used in optics, thermal power generation and other fields. Background technique [0002] At present, most of the main chains of transparent polymer materials are C-C bonds, which have low bond energy and cannot withstand the erosion of natural conditions such as ultraviolet rays. Fluorine-containing polymer materials often show excellent performance, which is determined by some special properties of the fluorine atom. The electron cloud of the fluorine atom has a strong shielding effect on the C-C bond of the polymer chain and plays a protective role on the main chain. Weather resistance...

Claims

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Application Information

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IPC IPC(8): C08G63/682C08G63/86C08G63/85B29C43/56
Inventor 熊传溪邓玮董丽杰刘芸
Owner WUHAN UNIV OF TECH
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