Modified bismaleimide resin applicable to resin transfer molding process and preparation method of modified bismaleimide resin
A technology of bismaleimide resin and bismaleimide, which is applied in the field of modified bismaleimide resin and its preparation, can solve the problem of the dielectric properties of bismaleimide resin. There is less research work on improvement and evaluation, and it is difficult to take into account the improvement of heat resistance, processing technology, and heat resistance weakening, so as to achieve the effects of excellent processing technology, improved dielectric properties, and excellent heat resistance.
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Embodiment 1
[0054] In a 500ml glass bottle equipped with a thermometer, an addition funnel and a mechanical stirring device, add 50g of 1-allyl-2-cyanatobenzene, raise the temperature to 140°C, and add 100g of 4,4' within 1 hour - bismaleimide diphenylmethane, and continue to keep warm at 140° C. for 1 hour, and the system is in a homogeneous and transparent state at this time. Cool the system down to 120°C, add 50g of 3-aminobenzocyclobutene, readjust the system temperature to 120°C, add 100g of 4,4′-bismaleimide diphenylmethane within 1 hour, and continue The reaction was incubated at 120° C. for 1 hour. Cool down to obtain a reddish-brown homogeneous and transparent modified bismaleimide resin.
Embodiment 2
[0056] In a 500ml glass bottle equipped with a thermometer, an addition funnel and a mechanical stirring device, add 30g of 1-allyl-2-cyanatobenzene, raise the temperature to 140°C, and add 75g of 4,4' within 1 hour - bismaleimide diphenylmethane, and continue to keep warm at 140° C. for 1 hour, and the system is in a homogeneous and transparent state at this time. Cool the system down to 120°C, add 60g of 3-aminobenzocyclobutene, readjust the system temperature to 120°C, add 120g of 4,4'-bismaleimide diphenylmethane within 1 hour, and continue The reaction was incubated at 120° C. for 1 hour. Cool down to obtain a reddish-brown homogeneous and transparent modified bismaleimide resin.
Embodiment 3
[0058] In a 500ml glass bottle equipped with a thermometer, an addition funnel and a mechanical stirring device, add 60g of 1-allyl-2-cyanatobenzene, raise the temperature to 140°C, and add 120g of 4,4' within 1 hour - bismaleimide diphenylmethane, and continue to keep warm at 140° C. for 1 hour, and the system is in a homogeneous and transparent state at this time. Cool the system down to 120°C, add 30g of 3-aminobenzocyclobutene, readjust the system temperature to 120°C, add 45g of 4,4'-bismaleimide diphenylmethane within 1 hour, and continue The reaction was incubated at 120° C. for 1 hour. Cool down to obtain a reddish-brown homogeneous and transparent modified bismaleimide resin.
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