Epoxy-Polyester Mixing Powder Coating

General introduction

made from epoxy and polyester, and possessed with flexibility of epoxy along with the characteristics of polyester. The coating has perfect leveling, decorative and mechanical performances and high corrosion resistance. It is widely used for various indoor metal products.

Product series

Standard type and low temperature curing type are available.

High gloss (over 80%), semi-gloss(50-80%),matt(20-50%),texture(below 20%) are available. Gloss also adjustable according to user’s demand.

Physical characteristics

S. G.: 1.3-1.7 (varies according to different color and gloss)

Particle size distribution: 100% pass 150目手筛

Leveling: 120-140

Curing conditions:

standard:        180℃(surface temp. of treated article) x 15 min.

low temperature: 160℃(surface temp. of treated article) x 15 min. (high gloss)

Coating film performance

Item

Test standard or method

Standard value

Impact resistance

ISO6272

GB/T1732-1993

50cm

Enrichsen test

ISO1520

GB/T9753-1988

8mm

Adhesion(cross cut)

ISO2409

GB/T9286-1996

Level 0

Bending resistance

ISO1519

GB/T6742-1986

2mm

Pencil hardness

ASTMD3363

GB/T6739-1996

H-2H

Salt mist test

ISO7253

GB/T1771-1991

>500h

Heat & moist test

ISO6270

GB/T1740-1979

>1000h

Heat resistance

150/24h (white color)

High gloss retention E0.3-0.4

Notes: 1. Above tests use 0.8mm thick deoiled and derusted cold rolled iron sheet. Coating thickness 50-70um.

      2. The coating performances may slightly decrease if gloss decreases.

Advantages and disadvantages

1.        Good leveling. Coating film is extremely even.

2.        Coating film is strong and tenacious, has god compliance.

3.        Coating film has good bondability and impact resistance.

4.        Good at electrostatic spray coating. A thin coating film can be obtained.

5.        Good heat and yellowing resistance.

6.        Aging resistance is not good. There’s chalking after long outdoor exposure.

7.        Average coverage 9-12 m2/Kg. Coating thickness 60um(calculated based on 100% powder usage).

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