Excellent Leveling Polyester Resin 93/7 NH3308 in TGIC Cure for Low Gloss Powder Coating 

◇ Applications:

NH3308 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system.

◇ Basic features:

Excellent leveling

Excellent mechanical properties

Good storage stability

Good weathering resistance

Good extinction performance

◇ Specifications:

Appearance white or light yellow transparent flakes

Color (50%DMF): max: 3

Acid number(mgKOH/g): 30～36

Softening point(℃): 103～113

Glass transition temp.(℃): ～65

Melting viscosity(ICI, mPa·s/200℃): 5250±750

Reactivity at 180℃(s, 7% TGIC): 250±50

◇ Recommend Formulation:NH3308—TGIC

◇ 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℃×10min

◇ Film Properties:

Gel time(180℃,sec) 250~400

Horizontal flow(180℃,mm): 25~29

Gloss(60°): ≥85%

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)