Epoxy resin mixture, epoxy resin composition and cured product thereof
A technology of epoxy resin and mixture, applied in the field of epoxy resin composition and its cured product, can solve problems such as the adverse effect of metal wires, and achieve the effect of excellent flame retardancy
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Embodiment 1
[0130] 214.7 parts of binaphthol, 46.6 parts of 4,4'-biphenol, 740 parts of epichlorohydrin, and 296 parts of dimethyl sulfoxide were added to a flask equipped with a stirrer, a reflux cooling pipe, and a stirring device while purging nitrogen. , dissolved under stirring, and heated to 45°C. Next, after adding 84 parts of flake-shaped sodium hydroxide in batches over 90 minutes, reaction was performed at 45° C. for 2 hours, and reaction was performed at 70° C. for 75 minutes. After completion of the reaction, solvents such as excess epichlorohydrin were distilled off from the oil layer under reduced pressure using a rotary evaporator. After adding 800 parts of methyl isobutyl ketone to the residue and washing with water, the temperature was raised to 75°C. Add 30 parts of a 30% by weight aqueous sodium hydroxide solution with stirring, react for 1 hour, then wash with water until the washing water of the oil layer becomes neutral, and distill off the methyl isophthalic acid f...
Synthetic example 1
[0132] In the flask equipped with stirrer, reflux cooling pipe, stirring device, add 214 parts of binaphthols, 555 parts of epichlorohydrins (4 molar equivalents with respect to phenolic resin), 55 parts of methyl alcohol while implementing nitrogen purging, stir Dissolve under temperature and raise the temperature to 70-75°C. Next, after adding 60 parts of flaked sodium hydroxide in portions over 90 minutes, reaction was performed at 75° C. for 75 minutes. After completion of the reaction, water was washed with 400 parts of water, and solvents such as excess epichlorohydrin were distilled off from the oil layer under reduced pressure using a rotary evaporator. To the residue, 500 parts of methyl isobutyl ketone was added and dissolved, and the temperature was raised to 75°C. Add 10 parts of 30% by weight sodium hydroxide aqueous solution and 10 parts of methanol under stirring, react for 1 hour, then wash with water until the washing water of the oil layer becomes neutral, a...
Synthetic example 2
[0134] Change 214.7 parts of binaphthol and 46.6 parts of 4,4'-biphenol into 242 parts of 3,3',5,5'-tetramethylbiphenyl-4,4'-diol, except that it is the same as the example 1 was synthesized in the same manner. As a result, 349 parts of epoxy resins (EP3) were obtained. The obtained epoxy resin had an epoxy equivalent of 190 g / equivalent, a softening point of 107° C., and an ICI melt viscosity at 150° C. of 0.03 Pa·s or less.
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