Flame-retardant bismaleimide resin and preparation method thereof
A technology of bismaleimide resin and maleimide resin, which is applied in the field of flame-retardant bismaleimide resin and its preparation, can solve the problem of large difference in solubility parameters, difficulty in dispersing, and reduced modification effect and other problems, to achieve the effect of wide applicability, outstanding processing, and simple operation process
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Embodiment 1
[0036] 1. Synthesis of functionalized ladder polyphenyl silsesquioxane containing amino groups
[0037] 1) Combine 5.40g of deionized water and 0.08g of concentrated hydrochloric acid with a mass concentration of 36.5% to form an acidic deionized aqueous solution. Under stirring and -15°C, add the acidic deionized aqueous solution to 19.80 dropwise within 0.5 hours. In a mixed solution composed of g phenyltrimethoxysilane and 200.00 g toluene, react at -15°C for 2 hours to obtain a prepolymer solution;
[0038] 2) After standing the prepolymer solution for stratification, wash the oil phase system to pH=7;
[0039] 3) Add an appropriate amount of 0.1mg / mL potassium hydroxide methanol solution to the oil phase system after washing (control the amount of alkaline catalyst to 2.5wt% of the oil phase system after washing), and react at 40°C for 3 hours. Obtain a trapezoidal polysilsesquioxane organic solution;
[0040] 4) Wash the obtained polymer organic solution with water to pH=7, add...
Embodiment 2
[0048] 1. Synthesis of functionalized ladder polyphenyl silsesquioxane containing amino groups
[0049] 1) Mix 36.00g of deionized water and 1.25g of hydrochloric acid solution (with a mass concentration of 36.5%) to form an acidic deionized aqueous solution. Under stirring and 15°C, add the acidic deionized aqueous solution dropwise within 0.5 hours In a mixed solution composed of 24.00g phenyltriethoxysilane and 25.00g xylene, the prepolymer solution was obtained after reaction at 15°C for 48 hours;
[0050] 2) After standing the prepolymer solution for stratification, wash the oil phase system with water to pH=6;
[0051] 3) Add an appropriate amount of 0.1 mg / mL potassium hydroxide methanol solution to the oil phase system after washing (control the amount of alkaline catalyst to 10wt% of the oil phase system after washing), and react at 120°C for 20 hours to obtain Ladder polysilsesquioxane organic solution;
[0052] 4) Wash the obtained polymer organic solution with water to pH...
Embodiment 3
[0056] 1. Synthesis of functionalized ladder-shaped polyphenylsilsesquioxane containing amino groups
[0057] 1) Combine 10.80g of deionized water and 0.17g of hydrochloric acid solution (concentration of 36.5%) to form an acidic deionized aqueous solution, and add 21.12g of phenylchlorosilane dropwise within 0.5 hours under stirring and -5°C In a mixed solution of 100.00 g xylene, react at -5°C for 8 hours to obtain a prepolymer;
[0058] 2) After the prepolymer solution is allowed to stand for stratification, the oil phase system is washed with water to pH=6.5;
[0059] 3) Add an appropriate amount of 0.1mg / mL potassium hydroxide methanol solution to the oil phase system after washing (control the amount of alkaline catalyst to 5wt% of the oil phase system after washing), and react at 100°C for 8 hours to obtain Ladder polysilsesquioxane organic solution;
[0060] 4) Wash the obtained polymer organic solution with water to pH=6.5, add 0.11g KOH and 33.3g N-2-aminoethyl-3-aminoprop...
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