Analysis of the effect of micro-particle curing agent on the performance of powder coatings

Foreword: Powder coating is a kind of environmentally friendly coating that does not contain solvent and has an average particle size of 35 microns.

1 Raw material part

1.

The curing agent passes through the airflow crushing equipment, and the material is repeatedly collided, rubbed, and sheared at the intersection of multiple high-pressure airflows.

It can be seen from Table 2 that after the curing agent is modified, the solid specific surface area is significantly increased, and the particle size is significantly reduced

2 Test part

2.

Jet mill (preparation of curing agent), Omega SCF-106 laser particle size analyzer, impact meter, bending tester, double screw extruder, electrostatic spray gun, constant temperature oven

2.

2.

The preparation of the coating film is carried out according to GB/T 1727-1992 "General Preparation Methods of Paint Films"; the impact resistance of the paint film is measured according to GB/T 1732-1993 "Methods for the determination of the impact resistance of paint films"; the flexibility of the paint film is according to GB/T 1731-1993 "Measurement Method of Paint Film Flexibility"; paint film adhesion shall be measured in accordance with GB/T 9286-1998

3 Results and discussion

Curing at 200℃*20min, the results obtained are shown in the table below

Table 6 Film performance of pure epoxy powder coating cured at 180℃*17min

Note: Test the flexibility of the coating film according to GB/T 1731-1993 "Determination of the flexibility of paint film"