Super Durable Isocyanate Polyester Resin with Good Flowability

◇ Applications:

NH7808 is a hydroxylated polyester resin for polyester/isocyanate powder coating system.

◇ Basic features:

Excellent leveling

Good mechanical properties

Good chemical resistance

◇ Specifications:

Appearance White or pale yellow transparent flake

Color (50%DMF): max: 2

Hydroxyl Value(mg KOH/g): 25～35

Softening point(℃): 102～112

Glass transition temp.(℃): ～59

Melting viscosity(200℃, cone/plate, mPa·s): 9000±500

Reactivity at 180℃(s, 17% B1530): 560±100

◇ 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

Film thickness: 50～70μm

Degreased cold-rolled steel 0.5mm

◇ Curing Requirement: 200℃×15min

◇ Film Properties:

Gel time(180℃,sec): 660~900

Horizontal flow:(180℃), mm: 27~31

Gloss(60°): ≥85%

Bending(φ1mm): Pass

Adhesive(1mm,grade): 0

Pencil hardness ≥1H

Direct Impact (50cm): pass

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

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