The material selection platform
Plastics & Elastomers
The material selection platform
Plastics & Elastomers
by SpecialChem
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Bayblend® FR421 MT

Technical Datasheet | Supplied by Covestro
Bayblend® FR421 MT by Covestro is a flame-retardant, rubber modified polycarbonate blend filled with mineral. Exhibits an excellent balance of properties such as rigidity, high dimensional accuracy & stability, excellent creep resistance, low moisture absorption and high heat resistance. Possesses good paintability, flowability and offers very good UL recognition in small wall thickness. Provides low emissions and offers high stiffness, easy processing & high toughness – even at cold temperatures. Processed by extrusion. Bayblend® FR421 MT is recommended for aircraft interiors application..
Product Type
PC (Polycarbonate) > PC, other Alloy
Product Status
Applications/ Recommended for
  • Aerospace/ Aircrafts > Interior parts
  • Extrusion

Bayblend® FR421 MT Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Linear Mold Shrinkage, Flow
0.5 - 0.7 %
(150x105x3 mm; 260 °C / MT 80 °C)
b.o. ISO 2577
Water Absorption
0.5 %
(At 23°C, Saturation)
ISO 62
Melt Volume Flow Rate (MVR)
2 cm3/10 min
(At 240°C; 5 kg)
ISO 1133
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