Low Temperature Curing Good Toughness HH2652 Blended Polyester Resin

Applications:

HH2562 is a carboxyl polyester resin designed for 50/50 hybrid powder coatings to be cured at 160℃.

Basic features:

Good leveling, good mechanical properties

Excellent chemical performance

Low curing temperature

Specifications:

Appearance White or light yellow transparent flakes

Color(50%DMF) max:3

Acid number(mgKOH/g): 68～75

Softening point(℃) 95～105

Glass transition temp.( ℃) 45～60

Melting viscosity(ICI, mPa·s/200℃): 1500～3500

Reactivity at 180℃(s, 50% Epoxy): 50～150

Recommend Formulation: HH2562—E12

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: 50～70μm

Degreased cold-rolled steel 0.5mm

Curing Requirement: 160℃×15-20min

Film Properties:

Gel time(180℃,sec): 60~160

Horizontal flow (180℃,mm): 21~26

Gloss(60°): ≥90%

Bending(φ1mm): pass

Adhesive(1mm,grade): 0

Pencil hardness: ≥1H

Impact(direct,reserve): pass 50kg·cm

Packaging:

PE bags, net weight 25kg±0.1kg / bag

Two-screw extruder