Polyester Resin NH-3307

◇  Applications:

      NH3307 is a saturated carboxyl polyester resin for polyester/TGIC powder coating system with excellent flow.

◇  Basic features:

      Excellent flow and anti-yellowing;

      Good chemical resistance; excellent storage stability;

      Super durable weather resistance

◇  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.(℃):                  ～65

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