Isocyanate Epoxy Polyester Resin , Thermosetting Polyester Resin Smudge Resistance

Super Durable Isocyanate Polyester Resin NH7807 with Good Flowability and Smudge Resistance

The coating is prepared by mixing resin, pigment and filler, curing agent and other additives in a certain proportion, and then by hot extrusion, crushing and screening. They are stored stably at room temperature. After electrostatic spraying or fluidized bed dip coating, they are heated, baked, melted and solidified to form a flat and bright permanent film, so as to achieve the purpose of decoration and anti-corrosion.

◇ Applications:

NH7807 is a hydroxylated polyester resin for polyester/isocyanate powder coating system.

◇ Basic features:

Excellent leveling

Excellent mechanical properties

High weathering resistance

Good smudge resistance

◇ Specifications:

Appearance White or pale yellow transparent flake

Color (50%DMF): max: 2

Hydroxyl Value(mg KOH/g): 27～33

Softening point(℃): 105～115

Glass transition temp.(℃): ～62

Melting viscosity(200℃, cone/plate, mPa·s): 10000±500

Reactivity at 180℃(s, 16.7% B1530): 350±50

◇ 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℃×20min

◇ Film Properties:

Gel time(180℃,sec): 500~600

Horizontal flow:(180℃), mm: 27~31

Gloss(60°): ≥90%

Bending(φ1mm): Pass

Adhesive(1mm,grade): 0

Pencil hardness ≥1H

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)