POLYURETHANE POWDER COATING
INTRODUCTION
POLYURETHANE POWDER COATING Series is outdoor durable polyurethane powder coating which
offers outstanding film appearance and toughness with superior weathering properties. They are true
alternative to high quality liquid paints and exhibits superior chip, mar and scuff resistance in addition to
corrosion and chemical resistance.
GLOSS AND COLOR RANGE
Gloss levels range from satin to high gloss :as low as 50% to more than 90% at 60º.
Full color range is available.
APPLICATION SCHEDULE
Applied by electrostatic spraying gun that can provide negative tension of 60-80 kV.
Curing schedule :10 minutes at 200ºC (metal temperature )
Optimal film thickness : 60 -90 um
POWDER PROPERTIES
Specific gravity : 1.40 - 1.75 (depend on colors)
Particle size distribution(Laser Particle size analyser) :Less than 10% above 100 um
50 - 65% above 32 um :
Average particle size : 35 - 50um
COATING PROPERTIES
The following are typical properties determined on 0.8 mm gauge degreased zinc phosphated steel .
Film thickness (ISO 2178) :
60 - 90 µm
Gloss (ISO 2813, 60º) :
50 to 90% and above
Adhesion (ISO 2409) :
GT= 0
Pencil hardness(ASTM D3363 ) :
H - 2H
Direct and reverse impact (ASTM D2794) :
> 50kg.cm
Salt spray Resistance ( ASTM B117, 800hrs)
(Maximum undercutting ,1 mm ):
No blistering
Humidity Resistance (ASTM D2247,500 hrs):
No blistering or loss of adhesion
Chemical Resistance(200hrs at ambient temperature)
Film unchang
SUBSTRATES AND PRE-TREATMENT
In order to obtain optimal anti-corrosion properties, it is recommended to apply a chemical pretreatment
prior to powder coating application.
Ferrous metals(cold rolled steel, cast iron etc.): Iron or zinc phosphatation
Zinc surfaces(galvanized steel, zinc alloy) : Chromatation or zinc phosphatation
Aluminum alloys : Chromatation
STORAGE
Should be stored under dry conditions with good ventilation at a temperature not exceeding 30 C.
Storage period recommended should not exceed 6 months,in case exceeding 6 months without
affecting their free flowing properties, the powder will still have optimal characteristics.
Should be protected from excessive heat,humidity,water and contamination with foreign materials
such as powder, dust, dirt, etc.
Any leftover powder should be kept in an appropriate area that is cool and dry. Do not expose to the
air too long as the powder properties may deteriorate with the moisture
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