Styryl siloxy phenolic resin, and preparation method and application thereof
A technology based on siloxy phenolic resin and phenolic resin, which is applied in the field of styrene-based siloxy phenolic resin and its preparation, and can solve the problems of undisclosed performance improvement of polyphenylene ether, etc.
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[0095] Example 1
[0096] 21 parts by weight of phenol formaldehyde phenolic resin and 1000 mL of anhydrous tetrahydrofuran were stirred in a reactor equipped with a stirrer, dropping funnel, thermometer and gas pipe (nitrogen gas) until completely dissolved into a uniform solution, and continuous nitrogen gas 0.5- The water vapor in the reaction kettle was removed for 1 hour, and nitrogen gas was maintained throughout the reaction process. Keep the temperature in the reactor below 20°C, and then slowly add 53 parts by weight of diphenyldichlorosilane dropwise. After the addition is completed, the reaction kettle is kept below 20°C for 8 hours, and then the temperature is raised to 55°C for 3 hours. Subsequently, 26 parts by weight of p-hydroxystyrene were added dropwise to the reaction kettle, and reacted at 55° C. for 5 hours. After the reaction, the tetrahydrofuran was removed by vacuum distillation to obtain a styrylsilyloxy-modified novolac resin (modified resin a). The st...
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[0098] Example 2
[0099] Stir 42 parts by weight of dicyclopentadiene phenolic resin and 1000 mL of anhydrous tetrahydrofuran in a reaction kettle equipped with a stirrer, dropping funnel, thermometer and gas pipe (nitrogen gas) until completely dissolved into a uniform solution, and continue nitrogen gas Remove the water vapor in the reaction kettle for 0.5-1 hour, and keep nitrogen gas during the whole reaction process. At the same time, the temperature in the reactor was kept below 20°C, and then 30 parts by weight of dimethyldichlorosilane were slowly added dropwise. After the addition is complete, the reaction kettle is kept below 20°C for 7 hours, and then the temperature is raised to 60°C for 2.5 hours. Subsequently, 28 parts by weight of p-hydroxystyrene were added dropwise to the reaction kettle and reacted at 58°C for 6 hours. After the reaction, the tetrahydrofuran was removed by distillation under reduced pressure to obtain a styrylsiloxy-modified dicyclopentadiene...
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[0101] Example 3
[0102] Stir 33 parts by weight of dicyclopentadiene-type phenolic resin and 1000 mL of anhydrous tetrahydrofuran in a reactor equipped with a stirrer, dropping funnel, thermometer and air duct (nitrogen) until completely dissolved into a uniform solution, and continue to pass nitrogen Remove the water vapor in the reaction kettle for 0.5-1 hour, and keep nitrogen gas during the whole reaction process. At the same time, the temperature in the reactor was kept below 20°C, and then 46 parts by weight of diphenyldichlorosilane were slowly added dropwise. After the addition is completed, the reaction kettle is kept below 20°C for 8 hours, and then the temperature is raised to 55°C for 3 hours. Subsequently, 28 parts by weight of p-hydroxystyrene were added dropwise to the reaction kettle, and reacted at 55° C. for 5 hours. After the reaction, the tetrahydrofuran was removed by vacuum distillation to obtain a styrylsilyloxy-modified dicyclopentadiene phenolic resin...
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