Ultradur® B 4520

About
Ultradur B 4520 is a medium viscosity, rapidly freezing injection molding grade. Applications Typical applications include chassis and housings for home appliances, office and sewing machines, and coil formers.&&

Product Description
SupplierBASF
Genericpolybutylene terephthalate
Material StatusCommercial: Active
FeaturesHB
AvailabilitysNorth America,Asia Pacific,Europe
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.30g/cm³ASTM D792
Density1.30g/cm³ISO 1183
Melt Volume Rate
250℃,2.16 kg19.0cm³/10minISO 1133
Shrinkage rate
MD:3.2 mm1.5%
Water absorption rate
Saturation, 23 ℃0.50%ISO 62
saturated0.50%ASTM D570
Equilibrium, 23 ℃, 50% RH0.25%ISO 62
Balance, 50% RH0.25%ASTM D570
Viscosity value
Reduced viscosity130.0ml/gISO 1628

MECHANICALNominal valueUnitTest method
Tensile modulus
23℃2500MPaISO 527-2
tensile strength ISO 527-2
Yield, 23 ℃60.0MPaASTM D638
Yield, -40 ℃94.0MPaISO 527-2
Yield, 23 ℃60.0MPaISO 527-2
Yield, 80 ℃22.0MPaISO 527-2
Yield, 120 ℃18.0MPaISO 527-2
Tensile strain
Yield, 23 ℃3.7%ISO 527-2
Yield, 23 ℃3.7%ASTM D638
Nominal tensile fracture strain
23℃> 50%ISO 527-2
Tensile Creep Modulus(1 hr)1800MPaISO 899-1
Tensile creep modulus
1000 hr1200MPaISO 899-1
Bending modulus
23℃2400MPaISO 178
23℃2300MPaASTM D790

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 179
-30℃3.0kJ/m²ISO 179
23℃6.0kJ/m²ISO 179
Charpy Unnotch Impact strength
23℃No Break ISO 179
Impact strength of cantilever beam notch ASTM D256
-40℃37J/mASTM D256
23℃43J/mASTM D256

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed60.0ISO 75-2/A
1.8 MPa, unannealed60.0ASTM D648
0.45 MPa, unannealed165ISO 75-2/B
0.45 MPa, unannealed163ASTM D648
Melting peak temperature223ASTM D3418
Melting temperature
DSC223ISO 3146
Linear coefficient of thermal expansion
MD1.5E-41/℃
Relative temperature index
Electrical performance UL 746
0.75 mm130UL 746
Strength mechanical performance UL 746
1.5 mm130UL 746
Impact mechanical performance UL 746
2.8 mm130UL 746
0.75 mm130UL 746
1.5 mm130UL 746
2.8 mm130UL 746
0.75 mm140UL 746
1.5 mm140UL 746
2.8 mm140UL 746

Electrical performanceNominal valueUnitTest method
Surface resistivity1.0E+13ohmsIEC 60093
1.5 mm1.0E+13ohmsASTM D257
Volume resistivity> 1.0E+13ohms·cmIEC 60093
1.50 mm> 1.0E+13ohms·cmASTM D257
Dielectric constant IEC 60250
100 Hz3.40 IEC 60250
1 MHz3.30 IEC 60250
Dissipation factor IEC 60250
100 Hz2.0E-3 IEC 60250
1 MHz0.020 IEC 60250
Compared to the leakage tracing index550VIEC 60112

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant level UL 94
0.75 mmHB UL 94
1.50 mmHB UL 94
2.80 mmHB UL 94

Process Conditions
injectionNominal valueUnitTest method
Drying temperature100 to 120°C
Drying time4.0hr
Recommended maximum moisture content0.040%
Processing (melt) temperature250 to 270°C
Mold temperature40 to 80°C
Injection pressure3.50 to 12.5MPa
Injection speedFast 
Back pressure< 1.00MPa

Notes
1. Typical properties: these are not to be construed as specifications.
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