BASF Ultracur3D ST 80 Tough Resin
BASF Ultracur3D ST 80 Tough Resin
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Ultracur3D® ST 80 is a photopolymer resin developed by BASF Forward AM, positioned by the manufacturer as a versatile resin focused on cost-per-part efficiency. Its transparent formulation delivers a tensile modulus of 1500 MPa and a flexural modulus of 1700 MPa, with a Shore D hardness of 80.
Viscosity drops from 400 mPa·s at 30 °C to 120 mPa·s at 50 °C, facilitating handling in the vat. Liquid resin density is 1.08 g/cm³ and cured part density reaches 1.12 g/cm³.
Mechanical behaviour
ST 80 resin retains ductile behaviour with an elongation at break of 20 % and a tensile strength of 35 MPa, complemented by a flexural strength of 60 MPa. Izod impact tests give 24 J/m on a notched specimen at 23 °C and 720 J/m on an unnotched specimen, while notched Charpy impact comes in at 1.4 kJ/m². Low-temperature behaviour is documented with a notched Izod of 14 J/m at -30 °C.
Thermal stability and applications
Heat deflection temperature (HDT) is 46 °C at 0.45 MPa and 42 °C at 1.82 MPa, which limits use of parts to applications without prolonged heat exposure. Water absorption over 24 hours remains limited to 0.50 %. The resin is positioned for prototyping, functional parts not subject to thermal constraints, and production runs where material cost control is a criterion. ISO 10993 biocompatibility data are available on request from the manufacturer.
Technical specifications
| Material | Photopolymer resin |
|---|---|
| Appearance | Transparent |
| Viscosity at 30 °C (cone/plate rheometer) | 400 mPa·s |
| Viscosity at 50 °C (cone/plate rheometer) | 120 mPa·s |
| Liquid resin density (ASTM D4052-18a) | 1.08 g/cm³ |
| Cured part density (ASTM D792) | 1.12 g/cm³ |
| Tensile modulus (ASTM D638) | 1500 MPa |
| Tensile strength (ASTM D638) | 35 MPa |
| Elongation at break (ASTM D638) | 20 % |
| Flexural modulus (ASTM D790) | 1700 MPa |
| Flexural strength (ASTM D790) | 60 MPa |
| Notched Izod at -30 °C (ASTM D256) | 14 J/m |
| Notched Izod at 23 °C (ASTM D256) | 24 J/m |
| Unnotched Izod at 23 °C (ASTM D256) | 720 J/m |
| Notched Charpy at 23 °C (ISO 179-1) | 1.4 kJ/m² |
| HDT at 0.45 MPa (ASTM D648) | 46 °C |
| HDT at 1.82 MPa (ASTM D648) | 42 °C |
| Shore D hardness (ASTM D2240) | 80 |
| Water absorption 24 h (ASTM D570) | 0.50 % |
| Biocompatibility (ISO 10993) | Data available on request |
Compatibility
- Vat photopolymerisation processes (SLA, DLP, MSLA)
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