Preparation method of 4,4'-(hexafluoroisopropylidene)diphenol (Bisphenol AF) phenolic resin

A technology for phenolic resin and bisphenol, which is applied in the field of preparation of bisphenol AF phenolic resin, can solve the problems of difficult control of aldehyde-phenol ratio, lack of production technology, troublesome operation of the step-by-step aldehyde addition method, etc. high yield effect

Inactive Publication Date: 2014-08-06
NANJING UNIV OF INFORMATION SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] Due to the fact that there are very few methods for preparing bisphenol AF phenolic resin, only a few people have tried to synthesize bisphenol AF phenolic resin, but the step-by-step aldehyde addition method is troublesome and the aldehyde-phenol ratio is not easy to control
In view of the lack of production process of the existing synthetic bisphenol AF phenolic resin and the shortcomings mentioned above, the development of the fluorine-containing material industry is facing challenges, thus prompting people to explore new, more environmentally and economically beneficial, operable Strong production methods, and then provide technical support for the development of my country's fluorine material enterprises, so there is an urgent need to study a new process for the synthesis of bisphenol AF phenolic resin

Method used

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  • Preparation method of 4,4'-(hexafluoroisopropylidene)diphenol (Bisphenol AF) phenolic resin
  • Preparation method of 4,4'-(hexafluoroisopropylidene)diphenol (Bisphenol AF) phenolic resin
  • Preparation method of 4,4'-(hexafluoroisopropylidene)diphenol (Bisphenol AF) phenolic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 16.8g (0.05mol) of bisphenol AF and 20ml of n-butanol into the four-neck flask. Set at 80°C and start heating and stirring until the bisphenol AF is completely dissolved. After cooling to room temperature, add 3.78g of formaldehyde solution with a mass concentration of 37% (containing 0.05mol of formaldehyde) and 2.0g of catalyst oxalic acid. The reflux reaction was carried out at 100°C for 6 hours, and then the solvent and water were removed by distillation under reduced pressure. The obtained product was washed with boiling water three times, and then distilled under reduced pressure again. Finally, after vacuum drying at 70° C. for 48 hours, an off-white solid was obtained with a weight of 16.73 g and a yield of 99.6%. The product was subjected to infrared spectrum analysis (see figure 2 ), the results showed that the off-white solid of the obtained product was bisphenol AF phenolic resin.

Embodiment 2-15

[0020] Example 2-15: (bisphenol AF: formaldehyde (molar ratio) = 1:1, reaction temperature T = 100°C)

[0021] Examples 2-15 Bisphenol AF phenolic resin was prepared according to the method of Example 1, but the amount of raw materials or catalysts and the polycondensation reaction temperature or reaction time were changed. The specific reaction conditions and yields are shown in Table 1.

[0022] Table 1 Example 2-15 reaction conditions and yield table

[0023] .

Embodiment 16-30

[0024] Example 16-30: (formaldehyde (molar ratio)=1:1, reaction temperature T=95°C)

[0025] Examples 16-30 Bisphenol AF phenolic resin was prepared according to the method of Example 1, but the amount of raw materials or catalysts and the polycondensation reaction temperature or reaction time were changed. The specific reaction conditions and yields are shown in Table 2.

[0026] Table 2 embodiment 16-30 reaction condition and productive rate table

[0027] .

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Abstract

The invention discloses a preparation method of a 4,4'-(hexafluoroisopropylidene) diphenol (Bisphenol AF) phenolic resin. The preparation method is implemented by taking 4,4'-(hexafluoroisopropylidene) diphenol and formaldehyde as raw materials and taking an oxalic acid as a catalyst through carrying out condensation polymerization, so that the 4,4'-(hexafluoroisopropylidene) diphenol phenolic resin is prepared. The preparation method is simple, excellent in performance and high in production rate, therefore, the preparation method has a great market potential.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of bisphenol AF phenolic resin. Background technique [0002] Bisphenol AF, also known as 2,2-bis-(4-hydroxyphenyl)-hexafluoropropane), is an important raw material for organic synthesis, which can be used as a vulcanization accelerator for fluororubber, and the permanent deformation of fluororubber vulcanized with FF34 Small, high tensile strength; can also be used as pharmaceutical intermediates. [0003] Phenolic resin has good acid resistance, mechanical properties and heat resistance, and is widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries. Fluorocarbon resin has a strong C-F bond as the skeleton. Compared with other resins, it has better heat resistance, chemical resistance, cold resistance, low temperature flexibility, weather resistance and electrical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/20
Inventor 张超智蒋威袁阳李世娟孙晓飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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