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Home >> Products Specification >> Polystyrol 454 C
Polystyrol 454 C
Product description
Polystyrol 454 C is an impact resistant polystyrene with a good balance of toughness, high flow, heat resistance and high gloss.
Polystyrol 454 C can be injection moulded under different conditions depending on machinery available and articles moulded. Mass temperature can be as high as 260°C. Polystyrol 454 C is suitable for gas assisted injection moulding. To achieve articles with very high gloss well polished surfaces are recommended. Extrusion temperatures should not exceed 240°C.
TV-front panels and back covers, VCR fronts, internal parts for refrigerators, office and household articles. Vacuum cleaner housings; toilet flush; telephones; air conditioner housings; toys; Coextruded gloss layers.
Physical form and Storage
Polystyrol 454 C is supplied as cylindrical shaped granules. It has to be kept in its original containers in cool, dry place. Avoid direct exposure to sunlight. Polystyrol 454 C can also be stored in silos.
Food legislation
If used unmodified and under appropriate processing conditions parts from Polystyrol 454 C comply with the usual requirements for food packaging. Detailed written confirmations (e.g. BGVO, FDA) are given on request. Please contact our regional sales office.
Product safety
During processing of Polystyrol 454 C small quantities of styrene monomer may be released into the atmosphere. At styrene vapour concentrations below 20 ppm no negative effects on health are expected. In our experience, the concentration of styrene does not exceed 1 ppm in well ventilated workplaces - that is where five to eight air changes per hour are made.
Further information can be found in our Polystyrol safety data sheets. These can be downloaded from the Plastics Portal,
The data contained in this publication are based on our current knowledge and experience. In view of the many factors that may affect processing and application of our product, these data do not relieve processors from carrying out their own investigations and tests; neither do these data imply any guarantee of certain properties, nor the suitability of the product for a specific purpose. Any descriptions, drawings, photographs, data, proportions, weights etc. given herein may change without prior information and do not constitute the agreed contractual quality of the product. It is the responsibility of the recipient of our products to ensure that any proprietary rights and existing laws and legislation are observed. In order to check the availability of products please contact us or our sales agency.
Typical values at 23°C1)
  Test method Unit Value
Mechanical Properties      
Tensile modulus ISO 527-1/-2 MPa 2200
Yield stress, 50 mm/min ISO 527-1/-2 MPa 27
Yield strain, 50 mm/min ISO 527-1/-2 % 1.4
Nominal strain at break, 50 mm/min ISO 527-1/-2 % 25
Flexural modulus ISO 178 MPa 2300
Flexural strength ISO 178 MPa 41
Shear modulus ISO 6721-2 MPa 900
Charpy impact strength (23°C) ISO 179/1eU kJ/m² 150
Charpy impact strength (-30°C) ISO 179/1eU kJ/m² 120
Charpy notched impact strength (23°C) ISO 179/1eU kJ/m² 16
Ball indentation hardness at 358 N/30 s ISO 2039-1 MPa 90
Thermal properties      
Vicat softening temperature VST/B/50 ISO 306 °C 82
Vicat softening temperature VST/A/120 ISO 306 °C 91
HDT A (1.80 MPa) ISO 75-1/-2 °C 78
HDT B (0.45 MPa) ISO 75-1/-2 °C 82
Melt volume-flow rate MVR 200 °C/5 kg ISO 1133 cm³/10min 14
Processing: Injection moulding (M), Extrusion (E), Blow moulding (B)     M.E
Melt temperature, injection moulding   °C 180 - 260
Mold temperature, injection molding   °C 10 - 60
Electrical properties      
Relative permittivity (100Hz) IEC 60250   2.5
Relative permittivity (1 MHz) IEC 60250   2.5
Volume resistivity IEC 60093 Ohm*m >1E16
Surface resistivity IEC 60093 Ohm >1E13
Electric strength K20/P50 IEC 60243-1 kV/mm 160
Optical properties      
Surface gloss   Skalenteile 70
UL 94 (d = 1,6 mm) UL-94 class HB
UL 94 (d = 3.18 mm) UL-94 class HB
IEC 65 (d = 2,4 mm) - - +
Other properties      
Density ISO 1183 kg/m³ 1022
Water absorption, equilibrium in water at 23°C similar to ISO 62 % <0.1
Moisture absorption, equilibrium 23°C/50% r.h. similar to ISO 62 % <0.1