Polyester Resin for General Industrial Powder Coating

◇ Applications:

NH3386 is saturated carboxyl polyester resin for applications of polyester/TGIC

powder coating system.

◇ Basic features:

Good flowability

Outstanding mechanical properties

Excellent of heat resistance and excellent anti-yellowing

Excellent storage stability

◇ Specifications:

Appearance pale yellow flake

Color(50%DMF): max:2

Acid number(mgKOH/g): 31～36

Softening point(℃): 105～115

Glass transition temp.(℃): ～69

Melting viscosity(200℃, cone/plate, mPa·s): 6500±1500

Reactivity at 180℃(s, 7% TGIC): 170～250

◇ Recommend Formulation:

◇ Extrusion Condition:

Two-screw extruder

Zone I: 90～110℃ Zone II: 110～120℃

Speed of revolution: 500～1200rpm

Fineness of powder: ＜100μm

◇ Application Condition:

Electrostatic spraying with: 40～70KV

Coating film thickness: 50～100μm

Degreased cold-rolled steel 0.5mm

◇ Curing Requirement: 200℃×10min

◇ Film Properties:

Gel time(180℃,sec): 260~360

Flow(180℃,mm) :23~28

Gloss(60°):≥85%

Bending(φ1mm): pass

Adhesive(1mm,grade): 0

Pencil hardness: 1H

Impact(50cm): pass

Storage test(40℃,24hr): good

Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)