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4Products

4、Saturated carboxyl polyestes Resin HY-5201 HY-5202


Saturated carboxyl polyestes Resin
HY-5201 HY-5202

General dascription
HY-5201 Hy-5202 is a saturated carboxy-polyester resin speidized for powder coatings.The polyesters type powder coating may be produced by combining this resins with TGIC(93:7)and the coatings film will be ploessed of high gloss.Very good mechanical propeties out door durability.HY-5201 is saturated carboxyl polyester resin for applications of Polyester/TGIC powder coating system.
Specifications  
Appearance: HY-5201 HY-5202
  Light yellow solid granule
Colour (50%DMF solution): ≤4 ≤4 (ASTM D 1544)
Acid value (mg KOH/g): 35+2 35+3 (ASTM D 1613)
Softening point℃ 112+1 117+3 (ball and ring)
Vitrifilcation point℃ 65+1 67+1 (ASTM D 3418)
ICI Viscosity(at200℃ pa s) 0.35-0.45 0.5-0.6 (ASTM D 4287)
Recommend Formulation  
Polyester resin 60% (HY-5201 or HY-5202)
Epoxy resin 5 (HY-TGIC)
Levelling agent 1 (HY-L1000)
Titanium dioxid 20
Barium sulfate 13.7
Benzion 0.3
Baking condition 200℃/10min 200℃/15min
Extrusion conditions  
APV Tow-screw extruder  
Speed of revolution 500-1200rpm
Kneader casing temperature℃ 110-130
Fineness of powder ≤100um
Application condition  
Electrostatic spraying Vith 40-60kv
Coationg film thickness 65-85nm
Pretreating with zinc phosphate  
Properties
Gel time(180dec,sec):

180-270(HY-5201); 240-330(HY-5202)
Gloss(60°): ≥90%
Bending(Φmm): pass
Adhesive(1mm grade) 0
Pencil hardness ≥1H
Impact(direct reserve) pass50kg cm
Storage test(40℃,24hr) good
Weather ability  
QUV A340 1000hr: maintenance gloss: ≥80%
QUV B3B 240hr: maintenance gloss: ≥80%
Package and Storage  
Packaging with PE lined paper bage,Net weight 25kg per bag.stored in dry and well ventilated place under temp 30℃ for 1 year.

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