Synthesis of carboxylic phenol resin active ester and etherate
A technology of phenolic resin and active ester, applied in the field of polymer material preparation, can solve the problems of difficulty in storage, poor compound stability, influence on printing endurance, etc., and achieve the effects of excellent comprehensive performance, high etherification rate and good stability
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Embodiment 1
[0018] Add 13g of carboxyl phenolic resin with code DF-10, 100mL of ether, 1.00g of phosphoric acid into a four-necked flask equipped with a stirrer, condenser, constant pressure dropping funnel and thermometer, and add 100ml of ethylene dropwise with a constant pressure dropping funnel Diethyl ether, after the dropwise addition, reacted at room temperature for 6 hours, washed with water, and dried in vacuo to obtain 12.6 g of a yellow solid, that is, carboxyl phenolic resin active ester and etherified product.
Embodiment 2
[0020] Add 5g carboxyl phenolic resin with code DF-10, 100mL 1,2-dichloroethane, 0.5g acetonyl triphenyl For phosphine bromide, add 60ml of vinyl ether dropwise with a constant pressure dropping funnel. After the dropwise addition, react at room temperature for 6 hours, wash with water, and dry in vacuo to obtain 5.1g of yellow solid, which is carboxyphenolic resin active ester and etherified product.
Embodiment 3
[0022] Add 6g of carboxyl phenolic resin whose code is DF-10, 100mL of dichloromethane, and 0.2g of acetonyl triphenylphosphine bromide to a four-necked flask equipped with a stirrer, condenser, constant pressure dropping funnel, and thermometer. Add 70ml of vinyl ethyl ether dropwise into the constant pressure dropping funnel. After the dropwise addition, react at room temperature for 3 hours, wash with water, and dry in vacuum to obtain 6.3g of yellow solid, which is carboxyphenolic resin active ester and etherified product.
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