Covestro Makrolon® 6555 RE CQ PC Resin
Makrolon 6555 RE CQ PC Resin
Makrolon 6555 RE CQ is a flame-retardant polycarbonate resin with medium viscosity (MVR 10 cm³/10 min) and UL 94V-0 certification (3.0 mm). Optimized for injection molding (280–320°C melt temp), it offers easy release, transparency/color versatility, and ISCC PLUS-certified bio-circular sustainability via mass balance.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate (300 °C/1.2 kg): 10 cm³/10 min (ISO 1133)
- Melt mass-flow rate (300 °C/1.2 kg): 10 g/10 min (ISO 1133)
- Molding shrinkage (parallel, 60x60x2 mm³, 500 bar): 0.7% (ISO 294-4)
- Molding shrinkage (normal, 60x60x2 mm³, 500 bar): 0.75% (ISO 294-4)
- Molding shrinkage range (parallel/normal): 0.6–0.8% (ISO 2577)
Mechanical Properties (23 °C/50 % r.h.)
- Tensile modulus (1 mm/min): 2400 MPa (ISO 527-1, -2)
- Yield stress (50 mm/min): 66 MPa (ISO 527-1, -2)
- Yield strain (50 mm/min): 6.2% (ISO 527-1, -2)
- Nominal strain at break (50 mm/min): >50% (ISO 527-1, -2)
- Tensile creep modulus (1 h): 2200 MPa (ISO 899-1)
- Flexural modulus (2 mm/min): 2400 MPa (ISO 178)
- Flexural strength (2 mm/min): 98 MPa (ISO 178)
- Charpy notched impact strength (23 °C, 3 mm): 70 kJ/m² (ISO 21305/ISO 179/1eA)
- Charpy notched impact strength (-30 °C, 3 mm): 14 kJ/m² (ISO 21305/ISO 179/1eA)
Thermal Properties
- Glass transition temperature: 145 °C (ISO 11357-1, -2)
- Temperature of deflection under load (1.80 MPa): 125 °C (ISO 75-1, -2)
- Vicat softening temperature (50 N, 50 °C/h): 144 °C (ISO 306)
- Coefficient of linear thermal expansion (23 to 55 °C, parallel/normal): 0.65 × 10⁻⁴/K (ISO 11359-1, -2)
- Burning behavior (3.0 mm): UL 94 V-0 (UL 94)
- Relative temperature index (Tensile strength, 1.5 mm): 125 °C (UL 746B)
Electrical Properties (23 °C/50 % r.h.)
- Relative permittivity (100 Hz): 3.1 (IEC 60250)
- Dissipation factor (100 Hz): 8 × 10⁻⁴ (IEC 60250)
- Volume resistivity: 1 × 10¹⁴ Ohm·m (IEC 62631-3-1)
- Surface resistivity: 1 × 10¹⁶ Ohm (IEC 62631-3-2)
- Electrical strength (1 mm): 34 kV/mm (IEC 60243-1)
Other Properties (23 °C)
- Density: 1200 kg/m³ (ISO 1183-1)
- Water absorption (saturation, 23 °C): 0.30% (ISO 62)
- Water absorption (equilibrium, 23 °C, 50% r.h.): 0.12% (ISO 62)
- Luminous transmittance (2 mm): 89% (ISO 13468-2)
Processing and Drying Conditions
- Melt temperature: 280–320 °C (Recommended)
- Mold temperature: 80–120 °C (Recommended)
- Dry air drying temperature: 120 °C
- Dry air drying time: 2–3 hours
- Moisture content (max): ≤ 0.02%
Features & Benefits
Eco-Conscious Material Sourcing
This Covestro PC Makrolon 6555 RE CQ uses bio-circular attribution (ISCC PLUS), reducing fossil reliance while matching virgin-grade performance—ideal for brands targeting carbon footprint reduction.
Reliable Flame Safety
It achieves UL 94V-0 (3.0 mm) and V-2 (1.0 mm) ratings with high oxygen index (ISO 4589-2: 35), ensuring critical fire protection for electronics and electrical housings.
Precision Molding Efficiency
Medium viscosity and low shrinkage (0.6–0.8%) enable smooth injection molding, minimal warpage, and fast cycle times—cutting production costs for complex parts.
Use & Applications
- Electronics: Connectors, circuit breakers, and transparent covers.
- Automotive: Dashboard components, lighting housings.
- Industrial: Safety visors, machine guards.
- Consumer Tech: Power tool casings, charger enclosures.