Process of preparing oxyalkylene-base unsaturated ester polymer
A polyoxyalkylene-based, unsaturated technology, applied in the field of preparing polyoxyalkylene-based unsaturated esters, can solve the problems of unfavorable industrial production and long reaction time, and achieve easy control of synthesis conditions, save reaction time, and facilitate industrial production Effect
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Examples
Embodiment 1
[0032]Add 90 g of xylene solution dissolved with 1 g of sodium methoxide into the reactor, and after evacuating the reactor, replace it with nitrogen for no less than 2 times, draw in 50 g of methanol under negative pressure, raise the temperature to 135°C, and pass through ethylene oxide, Keep the reaction at 135°C and 0.05Mpa pressure for 1 hour, then cool the reaction mixture to room temperature, add 1.5g of sodium hydroxide to the reaction vessel, raise the temperature to 110°C, and keep the pressure at 20mmHg for 1.5 hours to dehydrate. Then the nitrogen pressure was increased to 0.5Mpa, and a solution of 100g methacryloyl chloride and 60g xylene was added to the mixture four times within 1 hour and stirred, and a solution of 25g methacryloyl chloride and 15g xylene was added each time. After 4 hours from the start of the reaction, when the alkalinity of the mixture decreased to a stable value, the mixture was neutralized with glacial acetic acid, and after the by-product ...
Embodiment 2
[0034] Add 90 g of xylene solution dissolved with 1 g of potassium methylate into the reactor, and after evacuating the reactor, replace it with nitrogen for no less than 2 times, draw in 50 g of methanol under negative pressure, raise the temperature to 135°C, and pass through ethylene oxide, Keep the reaction at 135°C and 0.05Mpa pressure for 1 hour, then cool the reaction mixture to room temperature, add 1.5g of potassium hydroxide to the reaction vessel, raise the temperature to 110°C, and keep the pressure at 20mmHg for 1.5 hours to dehydrate. Then the nitrogen pressure was increased to 0.5Mpa, and a solution of 100g of methacryloyl chloride and 60g of xylene was added to the mixture four times within 1 hour and stirred, and a solution of 25g of acryloyl chloride and 15g of xylene was added each time. After 4 hours from the start of the reaction, when the alkalinity of the mixture decreased to a stable value, the mixture was neutralized with glacial acetic acid, and after ...
Embodiment 3
[0036] Add 90 g of xylene solution in which 1 g of sodium ethoxide is dissolved in the reactor. After evacuating the reactor, replace it with nitrogen for no less than 2 times, draw in 50 g of ethanol under negative pressure, raise the temperature to 135 ° C, and pass through ethylene oxide. Keep the reaction at 135°C and 0.05Mpa pressure for 1 hour, then cool the reaction mixture to room temperature, add 1.5g of sodium hydroxide to the reaction vessel, raise the temperature to 110°C, and keep the pressure at 20mmHg for 1.5 hours to dehydrate. Then the nitrogen pressure was increased to 0.5Mpa, and a solution of 100g methyl methacrylate and 60g xylene was added to the mixture in four times within 1 hour and stirred, and each addition of 25g methyl methacrylate and 15g xylene solution. After 4 hours from the start of the reaction, when the alkalinity of the mixture decreased to a stable value, the mixture was neutralized with glacial acetic acid, and after the by-product salts ...
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Abstract
Description
Claims
Application Information
- IPC
- C08G65/26
- Inventors
- 苏花平; 何唯平