Kinte Materials Science and Technology Co.,Ltd
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Ultra Heat Resistance Polyester Resin NH8303 with Baking Temperature at 300°C
◇ Applications:
NH8303 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system, suitable for high temperature resistant powder coatings. In this model, we upgraded the formula to achieve the balance between high temperature baking resistance, weather resistance and mechanical properties of powder coatings.
◇ Basic features:
Good mechanical properties
Excellent storage stability
Excellent high temperature baking resistance
◇ Specifications:
Appearance: white or pale yellow transparent granule
Color (50%DMF): max: 2
Acid number(mgKOH/g): 29～35
Softening point(℃): 110～120
Glass transition temp.(℃): ≥70
Melting viscosity(200℃, cone/plate, mPa·s): 17000±2000
Reactivity at 180℃(s, 7% TGIC): 60-120
◇ Recommend Formulation:
| NH8303 | TGIC | Filler ＆ pigment | Leveling agent | Benzion | 701 |
| 200 | 15 | 140 | 2.4 | 1.2 | 1.2 |
◇ 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: 70～90μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 200℃×10-15min
◇ Film Properties:
Gel time(180℃,sec) :70~150
Horizontal flow:(180℃),mm: 19~23
Gloss(60°): ≥88%
Bending(φ1mm): Pass
Adhesive(1mm,grade): 0
Pencil hardness ≥1H
Impact(direct,reserve): Pass 50kg·cm
Heat resistance :
270℃ 2hr: maintenance gloss: ≥85%
300℃ 0.5hr: maintenance gloss: ≥85%
◇ 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)
