A kind of modified thermosetting resin and preparation method thereof
A thermosetting resin and thermosetting technology, which is applied in the field of modified thermosetting resin and its preparation, can solve problems not related to dielectric properties, etc., and achieve the effect of not harsh molding conditions, low dielectric constant, and simple and easy process
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Embodiment 1
[0038] (1) Fluorinated polyimide -b- Preparation of polysiloxane block copolymer copolymer
[0039] N 2 Under protection, at 25°C, 0.6726g of 4,4'-diaminodiphenyl ether was dissolved in 15mL of N,N'-dimethylacetamide to obtain solution A; 1.5927g of hexafluorodianhydride was added to solution A, Then the temperature was raised to 150°C, and kept for 2 hours to obtain solution B; at 25°C, 0.2870g of amino-terminated polydimethylsiloxane (molecular weight 1280g / mol, viscosity 40mm 2 / g) was dissolved in 2mL N,N'-dimethylacetamide to obtain solution C; at 150°C, solution C was added dropwise to solution B, and then 3mL toluene was added; the temperature was raised to 180°C and reacted for 4h to obtain Reaction system D: lower the temperature of reaction system D to 25° C., slowly pour it into 100 mL of methanol and stir, and precipitate a powdery product, which is dried to obtain crude product E. The crude product E was dissolved in 10 mL of dichloromethane and precipitated wi...
Embodiment 2
[0047] (1) Fluorinated polyimide -b- Preparation of Polysiloxane Block Copolymer
[0048] N 2 Under protection, at 25°C, 0.5381g of 4,4'-diaminodiphenyl ether was dissolved in 13mL of N,N'-dimethylacetamide to obtain solution A; 1.3439g of hexafluorodianhydride was added to solution A; Then the temperature was raised to 150°C, and kept for 2 hours to obtain solution B; at 25°C, 0.4305g of amino-terminated polydimethylsiloxane (molecular weight 1280g / mol, viscosity 40mm 2 / g) was dissolved in 3mL N,N'-dimethylacetamide to obtain solution C. At 150°C, add solution C dropwise to solution B, then add 2.5mL toluene, raise the temperature to 180°C, and react for 4 hours to obtain reaction system D; lower the temperature of reaction system D to 25°C, and slowly pour it into 80mL In methanol and stirring, the powdery product precipitated out, and after drying, the crude product E was obtained, which was dissolved in 8 mL of dichloromethane, and precipitated with 65 mL of methanol a...
Embodiment 3
[0053] (1) Fluorinated polyimide -b- Preparation of Polysiloxane Block Copolymer
[0054] N 2 Under protection, at 25°C, 0.4484g of 4,4'-diaminodiphenyl ether was dissolved in 10mL of N,N'-dimethylacetamide to obtain solution A; 1.1945g of hexafluorodianhydride was added to solution A; After the addition, the temperature rose to 150°C, and the reaction was kept for 2 hours to obtain solution B; at 25°C, 0.5740g of amino-terminated polydimethylsiloxane (molecular weight: 2 / g) was dissolved in 4mL N,N'-dimethylacetamide to obtain solution C. At 150°C, add solution C dropwise to solution B, then add 2mL of toluene, raise the temperature to 180°C, react for 4 hours, and obtain reaction system D; lower the temperature of reaction system D to 25°C, and slowly pour it into 70mL of methanol With stirring, the powdery product precipitated out, and after drying, the crude product E was obtained, which was dissolved in 7 mL of dichloromethane and precipitated again with 50 mL of meth...
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