Phenolic compound, epoxy resin, epoxy resin composition, prepreg, and cured product thereof
A technology of phenolic compounds and epoxy resins, applied in the field of epoxy resins, epoxy resin compositions, and new phenolic compounds, can solve the problem that the curing agent cannot be cured, the service life of the cured product is difficult to ensure, and the thermal conductivity of the cured product does not meet the market needs. and other problems, to achieve the effect of uniform cured product, excellent solvent solubility and excellent thermal conductivity
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Embodiment 1
[0132] 136 parts of 4'-hydroxyacetophenone, 152 parts of vanillin, and 200 parts of ethanol were put into a flask equipped with a stirrer, a reflux condenser, and a stirring device, and dissolved. After adding 20 parts of 97 mass % sulfuric acid to this, it heated up to 60 degreeC and was made to react at this temperature for 10 hours, Then, the reaction liquid was inject|poured into 1200 parts of water, and it crystallized. After the crystals were filtered out, washed twice with 600 parts of water, and then vacuum-dried, 256 parts of phenolic compound 1 as yellow crystals were obtained. The endothermic peak temperature of the resulting crystals measured by DSC was 233°C.
Embodiment 2
[0134] 166 parts of 4'-hydroxy-3'-methoxyacetophenone, 122 parts of 4-hydroxybenzaldehyde, and 200 parts of ethanol were put into a flask equipped with a stirrer, a reflux condenser, and a stirring device, and dissolved. After adding 20 parts of 97% sulfuric acid thereto, the temperature was raised to 50° C., and the reaction was carried out at this temperature for 10 hours. Then, the reaction liquid was poured into 1200 parts of water to crystallize. After the crystals were filtered out, washed twice with 600 parts of water, and then vacuum-dried to obtain 285 parts of phenolic compound 2 as dark brown crystals. The endothermic peak temperature of the obtained crystals measured by DSC was 193°C.
Embodiment 3
[0136] 56 parts of 4-methylcyclohexanone, 152 parts of vanillin, and 150 parts of ethanol were charged and dissolved in a flask equipped with a stirrer, a reflux condenser, and a stirring device. After adding 10 parts of 97 mass % sulfuric acid to this, it heated up to 50 degreeC and was made to react at this temperature for 10 hours, and then added 25 parts of sodium tripolyphosphates, and stirred for 30 minutes. Then, after adding 500 parts of methyl isobutyl ketone, water washing was performed twice with 200 parts of water, and the solvent was distilled off by an evaporator to obtain 304 parts of semi-solid phenol compound 3 .
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Abstract
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