General and Cost-effective Low Cure Polyester Resin NH3363 for Powder Coating Manufacture

◇ Applications:

NH3363 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system.

It is designed for low temperature curing powder coatings, which is cost-effecive and well-performed.

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.

◇ Basic features:

Low curing temperature

Excellent leveling

Good mechanical properties

Good weathering resistance

◇ Specifications:

Appearance: white or light yellow transparent flakes

Color (50%DMF): max: 1

Acid number(mgKOH/g): 31～36

Softening point(℃): 103～113

Glass transition temp.(℃): ～60

Melting viscosity(200℃, cone/plate, mPa·s): 4500±800

Reactivity at 180℃(s, 7% TGIC): 150±30

◇ 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: 160℃×15min

◇ Film Properties:

Gel time(180℃,sec) 120~180

Horizontal flow (180℃,mm): 22~24

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)

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