Modified maleimide compound as well as preparation method and application thereof
A maleimide and maleimide-based technology, applied in the field of modified maleimide compounds and their preparation, can solve the problems of the dielectric properties of the cured product, the adverse effects of water absorption rate and resistance to humidity and heat, and the like, Achieve the effect of excellent dielectric properties, good dielectric properties and processing properties, and low water absorption
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preparation example 1
[0095] An aromatic monoamine compound L-1 containing an active ester group, the structural formula is as follows:
[0096]
[0097] The preparation method comprises the following steps:
[0098] (1) In a 3L flask equipped with a thermometer, dropping funnel, and stirring device, add 139.1g (1mol) p-nitrophenol, 140.6g (1mol) benzoyl chloride and 1500g methylene chloride, stir and dissolve; place the flask Slowly add 106.2 g (1.05 mol) of triethylamine dropwise in a low-temperature tank at -5°C over 2 hours, and control the temperature of the system within the range of -5 to 10°C. After the dropwise addition of triethylamine is completed, continue the reaction for 1 hour. After the reaction, add deionized water and stir for 10 min, remove the water layer by standing and separating the liquid, and repeat the washing operation of the obtained dichloromethane layer until the pH of the water layer is 7; finally, concentrate and dry by heating under reduced pressure, so as to obt...
preparation example 2
[0102] A kind of aromatic monoamine compound L-2 containing active ester group, structural formula is as follows:
[0103]
[0104] The preparation method comprises the following steps:
[0105] (1) In a 3L flask equipped with a thermometer, dropping funnel, and stirring device, add 139.1g (1mol) p-nitrophenol, 78.5g (1mol) acetyl chloride and 1000g methylene chloride, stir and dissolve; place the flask on Slowly add 106.2 g (1.05 mol) of triethylamine dropwise in a low-temperature tank at -5°C over 2 hours, and control the temperature of the system within the range of -5 to 5°C. After the dropwise addition of triethylamine is completed, continue the reaction for 1 hour. After the reaction, add deionized water and stir for 10 min, remove the water layer by standing and separating the liquid, and repeat the washing operation of the obtained dichloromethane layer until the pH of the water layer is 7; finally, concentrate and dry by heating under reduced pressure, so as to obt...
preparation example 3
[0109] A kind of aromatic diamine compound L-3, structural formula is as follows:
[0110]
[0111] The preparation method comprises the following steps:
[0112] (1) In a 3L flask equipped with a thermometer, dropping funnel, and stirring device, add 55.1g (0.5mol) of hydroquinone, 203g (1mol) of terephthaloyl chloride and 2000g of dichloromethane, and stir to dissolve; Place the flask in a low-temperature tank at -10°C, slowly add 106.2g (1.05mol) of triethylamine dropwise, and control the temperature of the system within the range of -10 to 0°C. After the addition of triethylamine is complete, continue the reaction for 1 hour Add 139.1 g (1 mol) of p-nitrophenol, and slowly add 106.2 g (1.05 mol) of triethylamine dropwise. After the addition of triethylamine is completed, the reaction is continued for 2 h. After the completion of the reaction, let it stand for 2 hours, filter at room temperature to remove the precipitated triethylamine salt, distill the filtrate under r...
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