NH-7809

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NH-7809

NH-7809 is a Hydroxylated polyester resin for polyester/isocyanate  powder coating system.

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Technical Indexes

Basic features:

-Good chemical resistance and mechanical properties

-Excellent leveling

 

Specifications:

Appearance

 White or pale yellow transparent flake

 Color(50%DMF)

 max:2

 Hydroxyl Value(mgKOH/g)

 25~35

 Softening point(℃)

 102~112

 Glass transition temp(℃)

 ~66

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

 12000±2000

 Reactivity at 180℃(s,17%B1530)

 520±100

 

Recommend Formulation:

 HH-7809

 Hardener

 Filler & pigment

 Leveling agent

 Benzoin

 200

 40

 125

 4.5

 2.5

 

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°)

 >=85%

 Pencil hardness

 >=1H

 Gel time(180℃,sec)

 600~850

 Horizontal flow(180℃),mm

 27~32

 Bending(φ1mm)

 Pass

 Adhesive(1mm,grade)

 0

 Direct Impact(50cm)

 Pass

 

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

 

 

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