Composition

It is made of polyester resin/ curing agent or polyester resin/ epoxy resin, pigment, filler and additives through melting, extruding, grinding and processing.

Main features

 Excellent leveling property;

 Good mechanical performance;

 Stable physical and chemical performance;

 Strong adhesive force and resistance to salt spray.

Application

It is applicable to the protection of bottom layer of vehicle hub and coating of surface glazing.

Product series

It can be made into pure polyester, mixed products with various glosses and colors and transparent powder products according to customers’ requirements.

Technical indexes

Residue on sieve %125 μm

0 or based on negotiation

Color and appearance of paint film

The paint film is smooth and the color meets the color difference specified.

Hardness

≥ H

Gloss (60°)

High gloss ≥86, semi gloss 21-85, matt ≤20

Bending mm

2

Adhesive force (1×1 mm) Grade 6×6

0

Impact resistance kg.cm

40

Acid resistance (HCI 3%)240 h

The film has no change.

Alkali resistance (NaOH 5%) 168 h

Slight change is allowed but it shall be recovered within 2h

Salt spray resistance 1,000 h

≤ Grade 1

Damp-heat resistance 1,000 h

≤ Grade 1

Film thickness μm

50~60

Weather resistance: based on the type of coating.

Surface prepartion

The corresponding treatment method should be used based on the substrates, such as phosphating, chromizing, shot blasting or blast cleaning

1. The surface roughness should be 30 ~70 μm if reaching Grade Sa2.5 by shot blasting or blast cleaning.

2. Phosphating: degreasing- derusting- neutralizing- surface control- phosphating- passivating

Appearance of phosphating film: The phosphating film should be crystallized densely, continuously and evenly.

3. Chromizing: degreasing- rinsing- immersion cleaning- deoxidating- rinsing- chromizing

Method of Application

It is applicable to high voltage electrostatic spraying

Spraying voltage: 50-90 kV; air pressure for spraying: 0.1-0.2 Mpa; distance between the gun and workpiece: 200-300 mm

Curing condition: 180-200℃/10-15 minutes or customized according to customers’ requirements.

Additional coating: spraying and curing should be made after polishing the omitted part with sand paper and spraying the whole surface.