table of Contents

 

Introduction

Special feature

Main variety

Construction matters

Application range

Introduction

 

The powder coating is a coating containing 100% solids and coated in a powder form, which uses air as a dispersion medium. Epoxy powder coating is a kind of thermosetting powder coating with corrosion resistance and toughness. It is the earliest and fastest application. It consists of epoxy resin, pigment filler, additive and curing agent. The preparation of epoxy powder coatings is the only method for the international production of thermosetting powder coatings, namely melt-mixing extrusion-mixing, melt-mixing extrusion, and fine pulverization.

 

 

Epoxy resin powder epoxy coating required conditions: epoxy equivalent should be between 700-100 solid resin, molecular weight distribution is narrow; at its curing temperature, low melt viscosity, easy to level, flat and thin film Good dispersion of pigments and fillers.

 

Epoxy powder coating curing agents mainly include dicyandiamide, dicyandiamide derivatives, acid anhydrides, imidazoles, cyclic ethers, phenolic resin polyester resins, and boron trifluoride amine complexes. Industrially, dicyandiamide, imidazoles and cyclic ethers are generally used.

Special feature

 

The characteristics of epoxy powder coatings are as follows:

1 Epoxy powder coating has strong adhesion, especially to metal;

2 Epoxy powder coating paint film has good mechanical properties, high hardness, scratch resistance and corrosion resistance;

3 Epoxy powder coating has low melt viscosity, good leveling property, and the coating film has no defects such as pinholes and shrinkage cavities;

4 Epoxy powder coatings have a wide variety of colors, which can be formulated with no light, light, pattern, hammer pattern, etc.

5 Epoxy powder coating can be applied in a single coat with a thickness of 50-300 μm. For uncoated powder, it can be recycled.

6 Epoxy powder coatings require high coating equipment and require sophisticated and sophisticated equipment.

Main variety

 

Epoxy powder coatings are mainly epoxy varnish coatings, epoxy matt powder coatings, epoxy matt powder coatings, epoxy semi-gloss or flat powder coatings, epoxy electrophoretic powder coatings, and antibacterial and conductive types. Functional epoxy powder coatings such as flame retardant and fine art.

Construction matters

 

1 Epoxy powder coating is highly adaptable to coating, and can be applied by electrostatic spraying, fluidized bed dip coating, electrostatic fluidized bed dip coating, flame spraying, etc., among which electrostatic powder coating method is mostly used;

2 Epoxy powder coating electrostatic coating voltage is generally 40-80 kV, the distance is maintained 150-300 mm, the amount of powder sprayed should be balanced, at 70-200 g / min;

3 Epoxy powder coating electrostatic spraying times should not be too much;

4 Epoxy powder coating baking curing temperature and time should be strictly as required, baking temperature should be uniform, to avoid local baking temperature is too high or too low;

5 Do not ignore dust pollution, dust explosion and other issues when coating epoxy powder coatings.

Application range

 

Epoxy powder coating is not suitable for substrates with poor heat resistance, because its baking curing temperature is higher, up to 140 °C, it can be used for decorative protection of electrical switchgear, electronic instrumentation, metal silicon box, motor rotor or Electrical insulation protection of copper bars, anti-corrosion and anti-rust of kitchen utensils, auto parts, ships, building materials, underground facilities, etc.

Note: color can be customized