93/7 Saturated Polyester Resin

93/7 NH3307 Polyester Resin for TGIC Cure High Gloss Weather Durable Powder Coating 

Applications

NH3307 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system at the ratio 93/7.

Basic features:

Excellent leveling

Excellent anti-yellowing

Good chemical resistance and mechanical properties

High storage stability;

High weathering resistance

Suitable to make high gloss powder coatings for aluminum profile.

 Specifications:

Appearance white or light yellow transparent flakes

Color (50%DMF): max: 1

Acid number(mgKOH/g): 30～35

Softening point(℃): 103～113

Glass transition temp.(℃): ～67

Melting viscosity(200℃, cone/plate, mPa·s): 5000±1000

Reactivity at 180℃(s, 7% TGIC): 230±30

 Recommend Formulation:

NH3307—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: 50～100μm

Degreased cold-rolled steel 0.5mm

 Curing Requirement: 200℃×10~15min

 Film Properties:

Gel time(180℃,sec) 290~390

Horizontal flow(180℃,mm): 25~28

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