Fluorine-containing bisphenol aromatic polyester and preparation method thereof
A technology of aromatic polyester and fluorine-containing aromatics, which is applied in the field of fluorine-containing bisphenol aromatic polyesters and its preparation, can solve the problems of pollution, chemical corrosion resistance, low capacitance, cumbersome steps, etc., and achieve the expansion of application range, The effect of low dielectric constant and easy operation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0047] Add hexafluorobisphenol A and acetic anhydride in a three-port reactor at a molar ratio of 1:2, add dropwise the catalyst concentrated sulfuric acid, the amount of which is 0.1% of the total mass of hexafluorobisphenol A and acetic anhydride, reflux and stir for 0.5h, and The reacted solution was poured into ice water, and after the precipitate was precipitated, the mixture of the precipitate and ice water was suction-filtered, and the obtained solid was washed with deionized water until neutral, and dried in a vacuum oven at 60°C for 24 hours to obtain 2,2 - bis(4-acetoxyphenyl)hexafluoropropane.
[0048] Add 2,2-bis(4-acetoxyphenyl)hexafluoropropane, terephthalic acid and isophthalic acid in a molar ratio of 1:0.9:0.1 into the polymerization kettle, and add the initiator zinc acetate in an amount of 0.1% of the total mass of the reactants, stirred and filled with nitrogen, heated to 250 ° C, after 3 hours of reaction, stopped filling nitrogen, vacuumed, the vacuum deg...
Embodiment 2
[0050]Add bis(4-hydroxyphenyl)difluoromethane and acetyl chloride into the three-port reactor at a molar ratio of 1:2.1, and add the catalyst p-toluenesulfonic acid in an amount of bis(4-hydroxyphenyl)difluoromethane and 0.5% of the total mass of acetyl chloride, reflux and stir for 2 hours, pour the reacted solution into ice water, and after the precipitation, filter the mixture of precipitation and ice water, and wash the obtained solid with deionized water until neutral , and dried in a vacuum oven at 60°C for 24 hours to obtain bis(4-acetoxyphenyl)difluoromethane.
[0051] Add bis(4-acetoxyphenyl)difluoromethane, terephthalic acid and isophthalic acid in a molar ratio of 1:0.8:0.2 into the polymerization kettle, add the initiator zinc acetate, and the dosage is the total mass of the reactants 0.2%, stir and fill with nitrogen, heat up to 260°C, after 3 hours of reaction, stop nitrogen filling, vacuumize, the vacuum degree is 25KPa, heat up to 310°C and react for 1 hour, re...
Embodiment 3
[0053] Add 2,2-bis(4-hydroxyphenyl)-1,1,1-trifluoroethane and acetyl chloride into the three-port reactor at a molar ratio of 1:2.1, and add the catalyst p-toluenesulfonic acid, the dosage 1% of the total mass of 2,2-bis(4-hydroxyphenyl)-1,1,1-trifluoroethane and acetyl chloride, stirred at reflux for 1 hour, poured the reacted solution into ice water, and waited for precipitation Finally, the mixture of the precipitate and ice water was suction filtered, the obtained solid was washed with deionized water until neutral, and dried in a vacuum oven at 60°C for 24 hours to obtain 2,2-bis(4-acetoxyphenyl)- 1,1,1-Trifluoroethane.
[0054] Add 2,2-bis(4-acetoxyphenyl)-1,1,1-trifluoroethane and terephthalic acid in a molar ratio of 1.1:1 into the polymerization kettle, and add the initiator zinc acetate, the dosage 0.5% of the total mass of the reactants, stirred and filled with nitrogen, heated up to 260°C, after 3.5 hours of reaction, stopped filling nitrogen, vacuumed, the vacuum...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More