NH-6503

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NH-6503

NH-6503 is a saturated carboxyl polyester resin for Polyester/Primid powder coatings with super durable weatheribility.

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Technical Indexes

Basic features:

-Excellent weathering resistance

-Excellent leveling

-Good anti-yellowing

 

Specifications:

 Appearance

 White or pale yellow transparent flakes

 Color(50%DMF)

 max:2

 Acid number(mgKOH/g)

 30~35

 Softening point(℃)

95~110 

 Glass transition temp(℃)

 ~57

 Melting viscosity(200℃,cone/plate,mPa·s)

 3500±500

 Reactivity at 180℃(s,5%T-105)

 250±50

 

Recommend Formulation:

 NH-6503

 Primid XL-552

 Filler&Pigment

 Leveling agent

 Benzoin

 701

 703

 566

 34

 380

 8

 4

 4

 4

 

Extrusion Condition:Two-screw estruder

 Zone Ⅰ

 90~110℃

 ZoneⅡ

 110~120℃

 Speed of revolution

 500~1200rpm

 Fineness of powder

 <100μm

 

Application Condition:

 Electrostatic spraying with

 40~70KV

 Coating film thickness

 50~70μm

 Degreased cold-rolled steel

 0.5mm

 

Curing Requirement:200℃*10min

 

Film Properties:

 Gel time(180℃, sec)

 160~250

 Horizontal flow:(180℃),mm

 26-28

 Gloss(60°)

 >=88%

 Bending(φ2mm)

 pass

 Adhesive(1mm,grade)

 0

 Pencil hardness

 >=1H

 Direct Impact(50cm)

 pass

 

Packaging:PE bags, N.W. 25KG±0.1KG / bag

 

 

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