Bismaleimide resin for microdiameter pultrusion process and preparation method thereof
A technology of bismaleimide and pultrusion molding, which is applied in the field of bismaleimide and its synthesis and preparation, can solve the problems of poor solubility, short pot life, less pultrusion molding process, etc., and achieve good heat resistance Performance, Suppression of Segment Motion, Wide Range of Effects
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Embodiment 1
[0031] Add 90 g of 4,4'-diallyl bisphenol A and 15 g of 4,4'-diaminodiphenyl sulfone into a 500 mL four-neck flask equipped with mechanical stirring, thermometer, reflux condenser and nitrogen introduction device and 100 g of 4,4'-bismaleimide diphenylmethane, stir and start to use an oil bath to raise the temperature until the constant temperature is 100°C. After the reaction raw materials are completely dissolved and become an orange transparent homogeneous system, add phase transfer under nitrogen protection Catalyst ethyl triphenylphosphine bromide methanol solution 0.18g (the weight percent concentration of ethyl triphenylphosphine bromide is 70%), then heat up to 120°C at a rate of 2°C / min, and keep warm at 120°C for reaction After 30 minutes, lower the temperature to 100°C, add 0.26 g of tert-butyl peroxybenzoate and 7.5 g of bisphenol A epoxy resin E-54 (epoxy equivalent of 181 to 187 g / mol), stir and mix evenly, The temperature was lowered to obtain a light yellow sem...
Embodiment 2
[0034] Add 100 g of 4,4'-diallyl bisphenol A and 5 g of 4,4'-diaminodiphenyl sulfone into a 500 mL four-neck flask equipped with mechanical stirring, thermometer, reflux condenser and nitrogen introduction device , stirred and began to use an oil bath to raise the temperature until the constant temperature was 100°C. After the reaction raw materials were completely dissolved, an orange transparent homogeneous system was formed. Under the protection of nitrogen, 100g of 4,4'-bismaleimide diphenylmethane was slowly added to keep Stir to make the reaction system in a clear and homogeneous state, add 0.2 g of phase transfer catalyst benzyltrimethylammonium bromide, then raise the temperature to 130°C at a rate of 3°C / min, keep the reaction at 130°C for 45 minutes, then lower the temperature To 100°C, add 0.27g of tert-butyl peroxybenzoate, 5 g of bisphenol A epoxy resin E-54 (epoxy equivalent of 181-187g / mol), stir and mix evenly, then cool down to obtain a light yellow semi-solid ...
Embodiment 3
[0037] Add 50 g of 4,4'-diallyl bisphenol A and 5 g of 4,4'-diaminodiphenylsulfone into a 250 mL open beaker, stir with a glass rod and heat with an oil bath at 100°C, wait until The reaction raw materials are completely dissolved into an orange transparent homogeneous system, slowly add 50g of 4,4'-bismaleimide diphenylmethane, keep stirring to make the reaction system in a clear and homogeneous state, add the phase transfer catalyst ethyltriphenyl Phosphine bromide methanol solution 0.18g (the weight percent concentration of ethyltriphenylphosphine bromide is 70%), heat and keep it in an oil bath at 130°C for 1 hour, add 0.1g dicumyl peroxide, benzoic acid peroxide 0.1 g tert-butyl ester, stir well, add 2.5 g bisphenol A epoxy resin E-54 (epoxy equivalent: 181-187 g / mol), 0.5 g 3-aminopropyltriethoxysilane, stir well , the temperature was lowered to obtain a light yellow resin product.
[0038] Using the bismaleimide resin prepared above, using Toray T300 6K carbon fiber as...
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