Modified nylon powder coating and preparation method thereof
A technology of powder coating and modified nylon, which is applied in the direction of powder coating, polyamide coating, coating, etc., can solve the problems of high health and environmental protection costs, reduce nylon powder coating, unfavorable promotion, etc., achieve easy implementation and application, solve flow Poor performance and environment-friendly effect
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[0027] combine figure 1 , modified nylon powder coating of the present invention and preparation method thereof, its steps are as follows:
[0028] When using hexamethylenediamine and adipic acid in an equimolar ratio as raw materials in the preparation process, it is necessary to form a salt first.
[0029] Salt formation: Weigh hexamethylenediamine and adipic acid in an equimolar ratio, put them into a high-pressure reactor, use demineralized water as a solvent, and the quality of softened water is 50% of the total mass of hexamethylenediamine and adipic acid, and keep warm at 75°C for 1 hours, adjust the pH value to 7.0-7.2, the pre-salt formation is completed, and the salt-formation product is obtained.
[0030] When the raw material does not contain hexamethylene diamine, it can directly start from the polymerization step.
[0031]Polymerization: adding 50-80 parts by mass of caprolactam or nylon 6 resin, 50-80 parts by mass of nylon 66 salt, nylon 66 resin or the salt...
Embodiment 1
[0034] Modified nylon powder coating of the present invention and preparation method thereof, its steps are as follows:
[0035] When using hexamethylenediamine and adipic acid in an equimolar ratio as raw materials in the preparation process, it is necessary to form a salt first.
[0036] Salt formation: Weigh hexamethylenediamine and adipic acid in an equimolar ratio, put them into a high-pressure reactor, use demineralized water as a solvent, and the quality of softened water is 50% of the total mass of hexamethylenediamine and adipic acid, and keep warm at 75°C for 1 hours, adjust the pH value to 7.0-7.2, the pre-salt formation is completed, and the salt-formation product is obtained.
[0037] Polymerization: Adding 60 parts by mass of caprolactam and 40 parts of the salt-forming product of hexamethylenediamine and adipic acid in an equimolar ratio to the autoclave, adding additives, including antioxidants, nucleating agents and molecular weight regulators, respectively I...
Embodiment 2
[0040] Modified nylon powder coating of the present invention and preparation method thereof, its steps are as follows:
[0041] When the raw material does not contain hexamethylene diamine, it can directly start from the polymerization step.
[0042] Polymerization: 80 parts by mass of caprolactam and 20 parts of nylon 66 salt were added to the autoclave, and additives, including antioxidants, nucleating agents and molecular weight regulators, were respectively 0.2 parts of antioxidant 1098 and 0.1 parts of gas phase II Silicon oxide, 0.1 part of adipic acid. Replace the air in the autoclave twice with carbon dioxide, then turn on the electricity to heat, and start stirring at the same time. When the temperature in the autoclave reaches 180°C and the pressure reaches 1.2MPa, start to maintain the pressure. At the same time, the temperature of the material should not be higher than 230°C. hour, and then within 2 hours, the pressure in the kettle was uniformly reduced to norma...
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