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Rulon Bearings

Covestro Makroblend® KU 2-7912 MBS151 Polycarbonate + PBT, Impact Grade  (discontinued **)
Categories: Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate/Polybutylene Terephthalate (PBT) Blend, Unreinforced; Polyester, TP; Polybutylene Terephthalate (PBT)

Material Notes:
  • (PC+PBT)-blends
  • impact modified
  • Injection molding grade
  • medium flow
  • high toughness at low temperatures
  • ideal for painted application
  • unreinforced

As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.

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Physical PropertiesMetricEnglishComments
Density 1.20 g/cc0.0434 lb/in³ISO 1183
Water Absorption 0.50 %0.50 %Similar to ISO 62
Moisture Absorption at Equilibrium 0.20 %0.20 %Similar to ISO 62
Melt Flow 25 g/10 min
@Load 5.00 kg,
Temperature 260 °C
25 g/10 min
@Load 11.0 lb,
Temperature 500 °F
estimated from MVR using room temperature density; ISO 1133
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Yield 50.0 MPa7250 psiISO 527-1/-2
Elongation at Break >= 50 %>= 50 %Nominal; ISO 527-1/-2
Elongation at Yield 4.0 %4.0 %ISO 527-1/-2
Tensile Modulus 2.10 GPa305 ksiISO 527-1/-2
Charpy Impact Unnotched NBNBISO 179/1eU
 NB
@Temperature -30.0 °C
NB
@Temperature -22.0 °F
ISO 179/1eU
Charpy Impact, Notched 6.00 J/cm²28.6 ft-lb/in²ISO 179/1eA
 4.50 J/cm²
@Temperature -30.0 °C
21.4 ft-lb/in²
@Temperature -22.0 °F
ISO 179/1eA
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+13 ohm-cm>= 1.00e+13 ohm-cmIEC 60093
Surface Resistance >= 1.00e+15 ohm>= 1.00e+15 ohmIEC 60093
Dielectric Constant  3.1
@Frequency 1e+6 Hz
3.1
@Frequency 1e+6 Hz
IEC 60250
 3.2
@Frequency 100 Hz
3.2
@Frequency 100 Hz
IEC 60250
Dielectric Strength 31.0 kV/mm787 kV/inIEC 60243-1
Dissipation Factor  0.0010
@Frequency 100 Hz
0.0010
@Frequency 100 Hz
IEC 60250
 0.0125
@Frequency 1e+6 Hz
0.0125
@Frequency 1e+6 Hz
IEC 60250
Comparative Tracking Index 600 V600 VIEC 60112
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 90.0 µm/m-°C50.0 µin/in-°FISO 11359-1/-2
CTE, linear, Transverse to Flow 90.0 µm/m-°C50.0 µin/in-°FISO 11359-1/-2
Melting Point 223 °C433 °FISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi) 100 °C212 °FISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi) 84.0 °C183 °FISO 75-1/-2
Flammability, UL94  HB
@Thickness 1.60 mm
HB
@Thickness 0.0630 in
IEC 60695-11-10
 HB
@Thickness 0.800 mm
HB
@Thickness 0.0315 in
IEC 60695-11-10
Oxygen Index 21 %21 %ISO 4589-1/-2
 
Processing PropertiesMetricEnglishComments
Melt Temperature 250 - 270 °C482 - 518 °F
 260 °C500 °FInjection Molding; ISO 294
Mold Temperature 60.0 - 80.0 °C140 - 176 °F
 70.0 °C158 °FInjection Molding; ISO 10724
Injection Velocity 200 mm/sec7.87 in/secISO 294
 
Descriptive Properties
AvailabilityAsia Pacific
 Europe
 India
 Near East/Africa
 North America
 South and Central America
FeatureRelease agent
FormPellets
ProcessInjection Molding

**
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PB09851 / 92691

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