Pinhole Free General HAA Low Curing Temperature Polyester Resin NH6563

◇ Applications:

NH-6563 is a saturated carboxyl polyester resin designed for 95:5 Primid XL 552 powder coating to be cured at 160℃.

◇ Basic features:

Low curing temp.

Outstanding mechanical properties

Good resistance to chemicals and fine anti-yellowing

Pinhole free in thicker films

◇ Specifications:

Appearance pale yellow flake

Color(50%DMF): max:2

Acid number(mgKOH/g): 30～34

Softening point(℃): 95～105

Glass transition temp.( ℃): ～58

Melting viscosity(200℃, cone/plate, mPa·s): 3800±700

Reactivity at 180℃(s, 5% XL552): 180±30

◇ Recommend Formulation:NH-6563

◇ 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: 160℃×15min.

◇ Film Properties:

Gel time(180℃,sec) 150~270

Flow(180℃,mm) 25~29

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)