40/60 Isophthalic Polyester Resin

Super Durable Isocyanate Polyester Resin NH7401 for PU Powder Coating

◇ Applications:

NH-7401 is a saturated hydroxyl-terminated polyester resin designed for polyester / isocyanate powder coating to be cured at 200℃.

Especially designed for one shot matte application with NH7805.

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 resistance to chemicals

Outstanding durable weatherablity

Used for polyurethane powder coating

High hydroxy value

◇ Specifications:

Appearance pale yellow flake

Color(50%DMF): max:2

Hydroxyl value(mgKOH/g): 280～320

Softening point(℃): 102～110

Glass transition temp.( ℃): ～60

Melting viscosity(200℃, cone/plate, mPa·s): 5000±2000

Reactivity at 180℃(s, 60%B1530): 70～250

◇ Recommend Formulation:NH-7401

◇ 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: 200℃×15min.

◇ Film Properties:

Gel time(180℃,sec) 480~780

Flow(180℃,mm) 28~32

Gloss(60°): ≥85%

Bending(φ1mm): pass

Adhesive(1mm,grade): 0

Pencil hardness: ≥1H

Storage test(40℃,24hr): good

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

Kinte’s product quality and stability are respected by customers. Kinte powder and liquid coating were successively rated as "famous brand products of Guangdong Province".

We will continue to uphold the business philosophy of "quality is the life of the enterprise, adhere to the first-class technology, first-class quality, first-class cost and first-class brand", provide all-round services and solutions for customers at home and abroad, and create a better future.