Phenolic resin and thermosetting resin composition
A technology of resin composition and phenolic resin, which is applied in the field of thermosetting resin composition, can solve the problems of insufficient heat resistance of the cured product, and achieve the effect of good fluidity and excellent moisture resistance
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Embodiment 1
[0074] Embodiment 1 (synthesis of phenolic resin)
[0075]100 g of resorcinol, 26 g of acetone, and 0.1 g of p-toluenesulfonic acid were added to a flask equipped with a cooling tube and a stirrer, and reacted at 80° C. for 2 hours. Next, 26 g of acetone was added and reacted at 80° C. for 2 hours. Then, it was washed four times with 100 g of pure water to remove the catalyst and unreacted resorcinol. Then, the distillate was removed at 150° C. under a reduced pressure of 50 mmHg to obtain 76 g of phenol resin A-1 as white crystals. The obtained phenol resin A-1 had a melting point of 200°C. 76 g of phenol resin A-1 was dissolved in 95 g of acetone, and then 19 g of nitrogen-containing phenol resin B-1 (manufactured by Showa Denko, Shounol BRM-5622, softening temperature 82°C, hydroxyl equivalent 160) was added and dissolved , the nitrogen-containing phenol resin B-1 is obtained by using dimethylolethylene urea as the nitrogen-containing compound and phenol as the phenolic ...
Embodiment 2
[0076] Embodiment 2 (synthesis of phenolic resin)
[0077] Except having used 57 g of phenol resin A-1 and 38 g of nitrogen-containing phenol resin B-1, it reacted similarly to Example 1, and obtained 95 g of phenol resin AN2. The softening temperature of the obtained phenol resin AN2 was 94°C.
Embodiment 3
[0078] Embodiment 3 (synthesis of phenolic resin)
[0079] 100 g of resorcinol, 65 g of acetone, and 0.1 g of p-toluenesulfonic acid were added to a flask equipped with a cooling tube and a stirrer, and reacted at 90° C. for 5 hours. Then, it was washed four times with 100 g of pure water to remove the catalyst and unreacted resorcinol. Then, the distillate was removed at 150° C. under a reduced pressure of 50 mmHg to obtain 94 g of light brown lumpy phenol resin A-2. The softening temperature of the obtained phenol resin A-2 was 119 degreeC. 76 g of phenol resin A-2 was dissolved in 95 g of acetone, and then 19 g of nitrogen-containing phenol resin B-1 was added and dissolved. Next, the distillate was removed at 150° C. under a reduced pressure of 50 mmHg to obtain 95 g of light brown lumpy phenol resin BN1. The softening temperature of the obtained phenol resin BN1 was 104 degreeC.
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