Tough mannich base curing agent and preparation thereof
A Mannich base and curing agent technology, applied in the field of curing agent, can solve the problems of difficult source of raw materials, insufficient flexibility, unsatisfactory water resistance and seawater resistance, etc., achieve good development prospects, improve adhesion and adhesion Relay effect
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[0040] Example 1 (Small-scale synthesis example)
[0041] Add 200g nonylphenol, 120g tung oil, 1.0g p-toluenesulfonic acid to a 2000ml four-necked flask equipped with a stirrer, an electric heating mantle, a dripping device, a condenser and a thermometer. The temperature of the system is controlled at 95℃ to maintain the reaction. 1.0h. Control the temperature of the system at 50°C, and start dripping 180g of ethylenediamine for 1.5h. After the dripping is completed, the temperature of the system is controlled to 50°C, and 380g of formaldehyde is started to be dripped, and the dripping time is 1.5h. Heat the material, control the temperature at 100°C, and react for 2.0h. The temperature of the system is increased, and dehydration is carried out under normal pressure and reduced pressure. Cool the material, that is, add 30 g of ethanol and stir evenly to obtain the finished product.
[0042]The technical indicators of the finished product are: amine value (mgKOH / g): 500; viscosity ...
Example Embodiment
[0048] Example 2
[0049] Add 200g of phenol, 120g of tung oil, 1.0g of p-toluenesulfonic acid to a 2000ml four-necked flask equipped with a stirrer, electric heating mantle, dripping device, condenser and thermometer. . Control the temperature of the system at 50°C, and start dripping 180g of ethylenediamine for 1.5h. After the dripping is completed, the temperature of the system is controlled to 50°C, and 380g of formaldehyde is started to be dripped, and the dripping time is 1.5h. Heat the material, control the temperature at 100°C, and react for 2.0h. The temperature of the system is increased, and dehydration is carried out under normal pressure and reduced pressure. Cool the material, that is, add 30 g of ethanol and stir evenly to obtain the finished product.
[0050] The technical indicators of the finished product are: amine value (mgKOH / g): 490; viscosity (25°C, mPa.s): 1600; appearance: red-brown transparent viscous liquid.
Example Embodiment
[0051] Example 3
[0052] Add 200g nonylphenol, 120g tung oil, 1.0g p-toluenesulfonic acid to a 2000ml four-necked flask equipped with a stirrer, an electric heating mantle, a dripping device, a condenser and a thermometer. The temperature of the system is controlled at 95℃ to maintain the reaction. 1.0h. Control the temperature of the system at 50°C, and start dripping 180g of ethylenediamine for 1.5h. After the dripping is completed, the temperature of the system is controlled to 50°C, and 380g of formaldehyde is started to be dripped, and the dripping time is 1.5h. Heat the material, control the temperature at 100°C, and react for 2.0h. The temperature of the system is increased, and dehydration is performed under normal pressure and reduced pressure. Cool the material, that is, add 30 g of benzyl alcohol and stir evenly to obtain the finished product.
[0053] The technical indicators of the finished product are: amine value (mgKOH / g): 510; viscosity (25°C, mPa.s): 1450; appea...
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