NH-7805

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NH-7805

NH-7805 is a Hydroxylated polyester resin polyester/isocyanate  powder coating system.

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Technical Indexes

Basic features:

-High weathering resistance

-Good chemical resistance and mechanical properties

-Excellent leveling

-Suitable for polyurethane powder coating

 

Specifications:

Appearance

 White or pale yellow transparent flake

 Color(50%DMF)

 max:2

 Hydroxyl Value(mgKOH/g)

 35~55

 Softening point(℃)

 102~112

 Glass transition temp(℃)

 ~61

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

 5000±1500

 Reactivity at 180℃(s,B1530)

 320±80

 

Recommend Formulation:

 HH-7805

 Hardener

 Filler & pigment

 Leveling agent

 Benzoin

 523

 130

 334

 10

 3

 

Extrusion Condition:Two-screw extruder

 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℃*20min

 

Film Properties:

 Gloss(60°)

 <=20%

 Pencil hardness

 >=3H

 Gel time(180℃,sec)

 660~930

 Horizontal flow(180℃),mm

 29~33

 Bending(φ1mm)

 Pass

 Adhesive(1mm,grade)

 0

 Direct Impact(50cm)

 Pass

 

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

 

 

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