Polyester Resin for Powder Coating

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