Polyester resin for 95:5 Primid XL 552 powder coating

NH-6582 is designed for 95:5 Primid XL 552 powder coating with outstanding mechanical properties and durable weatherability.

Applications:

      NH-6582 is a saturated carboxyl polyester resin designed for 95:5 Primid XL 552 powder coating to be cured at 180 centigrade.

Basic features:

      Excellent flowability

      Outstanding mechanical properties

      Good resistance to chemicals and fine anti-yellowing

      Good resistance to sag

      Pinhole free in thicker films

      Durable weatherability

Specifications:

      Appearance                                         whiter or pale yellow flake

      Color(50%DMF):                                             max:2

      Acid number(mgKOH/g):                                 31~35

      Softening point                                               100~110 C

      Glass transition temp.                                     ~60

      Melting viscosity(200 C, cone/plate, mPa·s):  5500±1000

     Reactivity at 180 C (s, 5% XL552):                   150±30

Recommend Formulation:

NH-6582/HAA

NH-6583	Primid XL-552	Filler and pigment	Leveling agent	Benzion
589	31	372	6	3

Extrusion Condition:

      Two-screw extruder

      Zone I: 90~110 C     Zone II: 110~120 C

      Speed of revolution:   500~1200rpm

      Fineness of powder:    smaller than 100μm

Application Condition:

      Electrostatic spraying with:  40~70KV

      Coating film thickness:         50~100μm

      Degreased cold-rolled steel  0.5mm

Curing Requirement:      180 C×10min.

Film Properties:

      Gel time(180 C,sec)                     120~230

      Gloss(60°)                               ≥85%

      Bending(φ1mm)                        pass

      Adhesive(1mm,grade)               0

      Pencil hardness:                           1H

      Impact(direct,reserve)             pass 50kg·cm

      Storage test(40 C,24hr)           good

      Weatherability

        QUV A353  1000hr  maintenance gloss: ≥80%

        QUV B313  240hr     maintenance gloss: ≥80%

Polyester resin for 95:5 Primid XL 552 powder coating