Kinte Materials Science and Technology Co.,Ltd
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NH8081&NH8588 Low Gloss Durable Polyester Resin in Dry Blending
◇ Applications:
NH8081/NH8588 are saturated carboxyl polyester resins for low gloss polyester/TGIC powder coatings by a dry blending procedure.
Because polyester resin has polar groups, the powder loading rate is higher than that of epoxy resin, it is not easy to yellowing during baking,
high gloss, good leveling, plump paint film, light color and other characteristics, so it has good decoration.
Generally used in refrigerators, washing machines, vacuum cleaners, instrument housings, bicycles, furniture and other fields.
◇ Basic features:
Low gloss film
Excellent mechanical properties
Good resistance to chemicals and fine anti-yellowing
durable weatherability
◇ Specifications:
NH8081 NH8588
Appearance: pale yellow flake pale yellow flake
Color(50%DMF): ≤2 ≤2
Acid number(mgKOH/g): 49～55 19～24
Softening point(℃): 105～115 103～113
Glass transition temp.( Tg,℃): ~67 ~64
Melting viscosity: 8250±1000 7500±1500
(200℃, cone/plate, mPa·s)
Reactivity at 180℃(s, TGIC): 75±25 505±75
◇ Recommend Formulation:
| Formulation | NH8081 | NH8588 | TGIC | Filler ＆ pigment | Leveling agent | Benzoin |
| I | 540 | — | 60 | 400 | 6 | 3 |
| II | — | 540 | 28.4 | 400 | 6 | 3 |
◇ Extrusion Condition:
Two-screw extruder
Zone I: 90～110℃ Zone II: 110～120℃
Speed of revolution: 500～1200rpm
Fineness of powder: ＜100μm
Blend I and II in the weight ratio of 1:1 after grinding.
◇ Application Condition:
Electrostatic spraying with: 40～70KV
Coating film thickness: 50～70μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 180℃×20min or 200℃×10min
◇ Film Properties:
Gloss(60°): ≤40%
Adhesive(1mm,grade): 0
Pencil hardness: ≥H
Direct Impact Resistance: pass 50kg·cm
◇ Packaging:
PE bags, N.W. 25KG±0.1KG / bag
Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)
Kinte is the first manufacturer in China to research and produce prepainted coating and it's spraying equipments.
Continuous fast production speed can reach 80m/min which surpasses the same kind of Euramerican with 40m/min. Our technology ranks tops in China and is in advanced level all over the world.
