Benzoxazine resin with electroactivity and preparation method thereof
A benzoxazine and electroactive technology, which is applied in the field of new electroactive benzoxazine resin and its preparation, can solve the problem that the performance cannot meet the needs of the electronic field, the application research of benzoxazine is less, and there is no polymer, etc. problems, to achieve the effect of easy industrial production, low softening temperature and simple curing process
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[0071] The present invention provides a method for preparing the electroactive benzoxazine, the steps are as follows:
[0072] 1. After adding 35-70 parts by weight of paraformaldehyde and 70-305 parts by weight of phenol to the reactor, add 600-1000 parts by weight of dispersing medium, and mechanically stir at 0-30℃ for 1~3h, the stirring speed is 300~600 rpm, then increase the system temperature to 40~50℃;
[0073] 2. Disperse 170-440 parts by weight of the electroactive primary amine intermediate into 200-600 parts by weight of the dispersion medium, and gradually add them to the system described in step S1.2. After the electroactive primary amine intermediate is added, the system is reacted at 40~60℃ under nitrogen atmosphere and protected from light for 6~12h;
[0074] 3. After step 2 is completed, the reaction solution is heated to a temperature of 65 to 150°C and refluxed for 1 to 3 hours;
[0075] 4. After step 3 is completed, cool the system to room temperature, and after a...
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[0077] Example 1
[0078] 70 parts by weight of paraformaldehyde, 185 parts by weight of phenol and 600 parts by weight of toluene were added to the reaction kettle, and mechanically stirred at 25°C for 1 hour at a stirring speed of 400 rpm, and then the temperature of the system was increased to 40°C. 170 parts by weight of the electroactive primary amine intermediate of structure type I was dispersed in 200 parts by weight of toluene, and slowly added to the mixture of paraformaldehyde and phenol. After the structure I type electroactive primary amine intermediate is added, the system is heated to 50°C, and after reacting for 7 hours under nitrogen atmosphere and protected from light, the temperature is rapidly raised to 120°C, and the reaction is refluxed for 2 hours. After the reaction was completed, the reaction was stopped and cooled to room temperature. After the reaction solution was washed with alkali and water three times, the organic phase was separated. The toluene ...
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[0084] Example 2
[0085] 70 parts by weight of paraformaldehyde, 230 parts by weight of bisphenol A and 600 parts by weight of toluene were added to the reaction kettle, and mechanically stirred at 600 rpm for 2 hours at 30°C, and then the temperature of the system was increased to 50°C. Disperse 350 parts by weight of the structure I type electroactive primary amine intermediate into 600 parts by weight of toluene, and slowly add it to the mixture of paraformaldehyde and bisphenol A. After the structure I type electroactive primary amine intermediate is added, the system is heated to 60°C, and after 8 hours of reaction under nitrogen atmosphere and protected from light, the temperature is rapidly raised to 125°C, and the reaction is refluxed for 3 hours. After the reaction was completed, the reaction was stopped and cooled to room temperature. After the reaction solution was washed with alkali and water 4 times, the organic phase was separated. The toluene in the organic phas...
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