Technical datasheet

Kostil® B 366

Supplied byVersalis (Eni Group)- Last Updated on Feb 4, 2026

Kostil® B 366 by Versalis (Eni Group) is styrene-acrylonitrile copolymer with good chemical resistance and a very low residual monomer content. It exhibits easy flow and high clarity properties. It is designed for the molding of items with complex shapes and/or with thin walls with fast cycles. It is recommended for lighting, bathroom furnishing, stationary, toys, displays for point of sales, catering such as cups and trays. Kostil® B 366 by Versalis (Eni Group) is also used in water tanks for appliances, sneeze screens (e.g. anti-Covid), medical and pharmaceutical items.
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Benefits

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Compliance

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Kostil® B 366 properties

Flammability properties

PropertiesValue & unitTest conditionTest method
Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login
Ignition Temperature0.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

PropertiesValue & unitTest conditionTest method
Elongation at Break0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Strength0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Rockwell M0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Unnotched Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength at Break0.0 Visible After LoginVisible After LoginVisible After Login

Other properties

PropertiesValue & unitTest conditionTest method
Density, Bulk0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Density0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login
Water Absorption0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
CTE, Linear, Parallel to Flow0.0 Visible After LoginVisible After LoginVisible After Login
Heat Deflection Temperature (HDT), Annealed0.0 Visible After LoginVisible After LoginVisible After Login
Melting Point0.0 Visible After LoginVisible After LoginVisible After Login
Vicat Softening Temperature0.0 Visible After LoginVisible After LoginVisible After Login
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Kostil® B 366 Processing Guidelines

Extrusion Processing Guidelines

PropertiesValue & unitTest conditionTest method
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Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
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