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Master Bond adhesives

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SABIC VALOX™ FR 4521 PBT (Asia)
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)

Material Notes: VALOX 4521 is a 20% glass filled, high flow, flame retardant Polybutylene Terephthalate (PBT) injection moldable grade. It has excellent chemical resistance and a UL94V0@0.75 flame rating and 5VA@2.0mm.

Information provided by SABIC

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.53 g/ccASTM D792
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength at Break 91.0 MPa5 mm/min; ASTM D638
Tensile Strength, Yield 89.0 MPa5 mm/min; ASTM D638
Elongation at Break 2.5 %5 mm/min; ASTM D638
Elongation at Yield 2.4 %5 mm/min; ASTM D638
Tensile Modulus 3510 MPa5 mm/min; ASTM D638
Flexural Strength 137 MPabrk, 1.3 mm/min, 50 mm span; ASTM D790
Flexural Modulus 4960 MPa1.3 mm/min, 50 mm span; ASTM D790
Izod Impact, Notched 42.0 J/mASTM D256
Izod Impact, Unnotched 480 J/mASTM D4812
 
Electrical PropertiesOriginal ValueComments
Arc Resistance 120 - 180 secASTM D495
Comparative Tracking Index 250 - 400 VUL 746A
Hot Wire Ignition, HWI >= 120 secUL 746A
High Amp Arc Ignition, HAI >= 120 arcsUL 746A
High Voltage Arc-Tracking Rate, HVTR >= 150 mm/minUL 746A
 
Thermal PropertiesOriginal ValueComments
Hot Ball Pressure Test 200 °CIEC 60695-10-2
Deflection Temperature at 0.46 MPa (66 psi) 218 °C
@Thickness 3.20 mm
unannealed; ASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 205 °C
@Thickness 3.20 mm
unannealed; ASTM D648
UL RTI, Electrical 130 °CUL 746B
UL RTI, Mechanical with Impact 130 °CUL 746B
UL RTI, Mechanical without Impact 130 °CUL 746B
Flammability, UL94 V-0
@Thickness 0.760 mm
UL 94
 
Processing PropertiesOriginal ValueComments
Nozzle Temperature 245 - 260 °CInjection Molding
Zone 1 240 - 255 °C
Zone 2 245 - 260 °C
Zone 3 250 - 265 °C
Melt Temperature 250 - 265 °C
Mold Temperature 65.0 - 90.0 °C
Drying Temperature 120 °CInjection Molding
Dry Time 3.00 - 4.00 hourInjection Molding
 12.0 hourCumulative; Injection Molding
Moisture Content 0.020 %
Back Pressure 0.300 - 0.700 MPa
Shot Size 40 - 80 %
Vent Depth 0.00250 - 0.00380 cm
Screw Speed 50 - 80 rpm

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PSABI10331 / 243798

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