Epoxy modified low-dielectric fluorine-containing polyphenyl ether coating and high-frequency high-speed copper-clad plate prepared from same

[0034] Embodiment one

[0035] (1) Preparation of low-molecular-weight hydroxyl-terminated fluorinated polyphenylene ether resin:

[0036] The structural formula of the low-molecular-weight hydroxyl-terminated fluorine-containing polyphenylene ether resin is as follows, and its preparation method is, in solvent B, add 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol , 2,6-difluorophenol and catalyst A, reacted at a temperature of 20°C for 2 hours, then added 2,6-dimethyl-1,4-benzenediol and reacted for 3 hours, and the low molecular weight end could be obtained by precipitation method Hydroxyl fluorinated polyphenylene ether resin; solvent B, 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol, 2,6-difluorophenol, catalyst A and 2,6-bis The weight ratio of methyl-1,4-benzenediol is: 100:50:200:10:1:10;

[0037]

[0038] Wherein, in the structural formula, x is 5, y is 20, z is 2, and n is 20.

[0039] The solvent B is ethyl acetate, and the catalyst A is a complexing agent

[0052] Embodiment two

[0053] (1) Preparation of low-molecular-weight hydroxyl-terminated fluorinated polyphenylene ether resin:

[0054] The structural formula of the low-molecular-weight hydroxyl-terminated fluorine-containing polyphenylene ether resin is as follows, and its preparation method is: in solvent B, add 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol , 2,6-difluorophenol and catalyst A, react at a temperature of 20°C for 10 hours, then add 2,6-dimethyl-1,4-benzenediol and react for 8 hours, and the low molecular weight end can be obtained by precipitation method Hydroxyl fluorinated polyphenylene ether resin; solvent B, 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol, 2,6-difluorophenol, catalyst A and 2,6-bis The weight ratio of methyl-1,4-benzenediol is: 100:60:300:20:3:20;

[0055]

[0056] Wherein, in the structural formula, x is 6, y is 23, z is 4, and n is 25.

[0057] The solvent B is tetrahydrofuran, and the catalyst A is copper chloride and N,N

[0070] Embodiment Three

[0071] (1) Preparation of low-molecular-weight hydroxyl-terminated fluorinated polyphenylene ether resin:

[0072] The structural formula of the low-molecular-weight hydroxyl-terminated fluorine-containing polyphenylene ether resin is as follows, and its preparation method is: in solvent B, add 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol , 2,6-difluorophenol and catalyst A, react at a temperature of 60°C for 6 hours, then add 2,6-dimethyl-1,4-benzenediol and react for 7 hours, and the low molecular weight end can be obtained by precipitation method Hydroxyl fluorinated polyphenylene ether resin; solvent B, 2,6-bis(trifluoromethyl)phenol, 2,6-dimethylphenol, 2,6-difluorophenol, catalyst A and 2,6-bis The weight ratio of methyl-1,4-benzenediol is: 100:70:800:20:8:40;

[0073]

[0074] Wherein, in the structural formula, x is 8, y is 25, z is 4, and n is 40.

[0075] The solvent B is dioxane, and the catalyst A is cuprous bromide and diethylami