High Tg Weather Durable Polyester Resin 93/7 NH3307 in TGIC Cure for High Gloss Powder Coating of Aluminum Profile

Applications:

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

Excellent flowability and durability, suitable for aluminum profile powder coatings.

Advantages of powder coatings

1. Health and environmental protection

All kinds of liquid chemical harmful film-forming, dispersion, wetting, leveling, anti-corrosion and anti mildew additives added to achieve coating performance are omitted.

2. Convenient transportation and storage

Ordinary coatings contain about 20-50% water or solvent, while powder coatings are completely solid without water or solvent, which is convenient and safe for transportation. In addition, coatings containing water or solvent tend to freeze when the transportation and storage temperature is lower than 0 ℃. This problem does not exist in powder coatings.

3. No preservative is required

In the traditional liquid coating, there is both water and bacterial food, which is easy to be polluted by bacteria. Therefore, in order to prevent deterioration, preservatives should be added, while latex powder coatings have no bacterial pollution and do not need preservatives

4. Paint smell

Compared with the general traditional coating smell residue, this coating can disperse quickly, which can be said to disappear immediately.

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

Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)