Fast Curing Polyester Resin NH3383 for Powder Coating Manufacture with Good Weatherability

Weather resistant polyester powder coating has been widely used in outdoor facilities with weather resistance requirements, such as building aluminum profile, automobile, motorcycle and bicycle parts, courtyard metal furniture, highway guardrail, outdoor advertising and lighting, ceiling, etc.

◇ Applications:

NH3383 is a saturated carboxyl polyester resin for applications of polyester/TGIC powder coating system.

◇ Basic features:

Good leveling

Outstanding mechanical properties

Excellent chemical resitance and anti-yellowing

Good storage stability

◇ Specifications:

Appearance: white or light yellow transparent flakes

Color(50%DMF): max:2

Acid number(mgKOH/g): 30～35

Softening point(℃) 103～113

Glass transition temp.( ℃) ～67

Melting viscosity(200℃, cone/plate, mPa·s): 5000±1500

Reactivity at 180℃(s, 7% TGIC) 130±30

◇ Recommend Formulation: NH3383—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

Coating film thickness: 50～100μm

Degreased cold-rolled steel 0.5mm

◇ Curing Requirement: 180℃×12min

◇ Film Properties:

Gel time(180℃,sec) 130~230

Horizontal flow(180℃,mm): 22~25

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)