Polyester Resin NH-3307
◇ Applications:
NH3307 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system with excellent flowability.
◇ Basic features:
Excellent flowability and anti-yellowing;
Good chemical resistance; Excellent storage stability;
Super durable weather resistance
Suitable for high gloss powder coatings.
◇ Specifications:
Appearance white or pale yellow flake
Color (50%DMF): max: 1
Acid number(mgKOH/g): 30～36
Softening point(℃): 103～113
Glass transition temp.(℃): ～67
Melting viscosity(200℃, cone/plate, mPa·s): 5000±1500
Reactivity at 180℃(s, 7% TGIC): 225±30
◇ Recommend Formulation:
NH3307—TGIC
|
NH3307 |
TGIC |
Filler ＆ pigment |
Leveling agent |
Benzoin |
|
564 |
42 |
384 |
7 |
3 |
◇ 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) 360~510
Flow(180℃,mm): 25~29
Gloss（60°）： 85±5%
Bending（φ1mm）： Pass
Adhesive（1mm,grade）： 0
Pencil hardness 1H
Impact（direct、reserve）： Pass 50kg·cm
Storage test（40℃，24hr）： Good
Weatherability：
QUV A353 1000hr：maintenance gloss: ≥80%
QUV B313 240hr： maintenance gloss: ≥80% ◇ Equivalent resin: Cytec Crylcoat C2441 |
