Polyester Resin for powder coating

Application

 P7030 polyester resin is a kind of saturated carboxyl polyester resin mixed with epoxy resin in 70/30 for epoxy/polyester powder coatings.

Properties

  Very high gloss
  Good flow
  Good mechanical properties
  Perfect anti-yellowing
  Good storage stability

  Specfications

  Appearance Chip solid
  Color(50%DMF) max 4
  Acid Value,mg KON/g 28-34
  Softening Point(ball)°C 95-115
  Tg,°C ≥ Min.50

  Package and Shelf life

  25kg net in polyethylene bag, one year in a dry and well-ventilated place at temperature below 30°C.

  Recommended Formulation

  P7030 420g
  Epoxy Resin(E-12)   180g
  TiO2 300g
  Flow Agent(SF-2) 50g
  Benzoin 5g

Extrusion Condition

  Extruder BUSS PLK46
  Casing setting temp°C  110-120
  Kneading screw temp.,°C 70

  R.P.M 50
  Particle size μm,max 100
  Curing Condition 180°C×15min (MT)

Film Properties

  Thickness μm 60+/-10
  Gloss,60°(%),≥90
  Cross-hatch adhision(2mm) 0-1
  Belting,mm,min≤6
  Slow penetration.mm.max ≥7
  Impact,Kg.c 50
  Hardness(pencil),H 1-2

Application Condition

  Spraying tension, KV 60
  Degreased cold-rolled steel,mm 0.5