ProtoGen 18920

About
DSM’s Somos® ProtoGen 18920 is a liquid photopolymer that produces accurate, ABS-like parts ideal for general purpose applications. Somos® ProtoGen resins are the first stereolithography resins to demonstrate different material properties based on machine exposure control. Based on Somos® Oxetane™ chemistry, Somos® ProtoGen 18920 offers superior chemical resistance, a wide processing latitude and excellent tolerance to a broad range of temperature and humidity, both during and after the build. Applications This high-temperature resistant, ABS-like photopolymer is used in solid imaging processes, such as stereolithography, to build three-dimensional parts. Somos® ProtoGen 18920 provides considerable processing latitude and is ideal for the medical, electronic, aerospace and automotive markets that demand accurate RTV patterns, durable concept models, highly accurate humidity & temperature resistant parts.&&

Product Description
SupplierDSM
Generic3D打印材料
Material StatusCommercial: Active
FeaturesHigh Heat Resistance,Moisture resistance,Durability,Solvent resistance
AvailabilitysNorth America,Asia Pacific,Europe

Technical Data
PHYSICALNominal valueUnitTest method
Density1.16g/cm³
Water absorption rate ASTM D570
balance0.78%ASTM D570
balance0.38%ASTM D570
balance0.74%ASTM D570
viscosity
30℃0.35Pa·s

IMPACTNominal valueUnitTest method
Impact strength of cantilever beam notch ASTM D256A
14 to 28J/mASTM D256-A
20 to 24J/mASTM D256-A
22 to 26J/mASTM D256-A

THERMALNominal valueUnitTest method
Hot deformation temperature ASTM D648
0.45 MPa, unannealed58.7ASTM D648
0.45 MPa, unannealed96.5ASTM D648
1.8 MPa, unannealed78.6ASTM D648
1.8 MPa, unannealed51.0ASTM D648
Glass transition temperature ASTM E1545
68.9ASTM E1545
97.5ASTM E1545
Linear coefficient of thermal expansion
MD 
-40 to 0 ℃6.5E-5cm/cm/℃ASTM E831
-40 to 0 ℃6.9E-5cm/cm/℃ASTM E831
0 to 50 ℃7.4E-5cm/cm/℃ASTM E831
50 to 100 ℃7.9E-5cm/cm/℃ASTM E831
50 to 100 ℃1.1E-4cm/cm/℃ASTM E831
100 to 150 ℃1.3E-4cm/cm/℃ASTM E831
100 to 150 ℃1.4E-4cm/cm/℃ASTM E831

Electrical performanceNominal valueUnitTest method
Dielectric strength ASTM D149
15 to 16kV/mmASTM D149
14 to 15kV/mmASTM D149
Dielectric constant ASTM D150
60 Hz3.53 ASTM D150
60 Hz3.28 ASTM D150
1 kHz3.23 ASTM D150
1 kHz3.44 ASTM D150
1 MHz3.21 ASTM D150
1 MHz3.04 ASTM D150

Supplementary informationNominal valueUnitTest method
Critical Exposure7.00mJ/cm²
Penetration depth106.7µm

MECHANICALNominal valueUnitTest method
Shore hardness ASTM D2240
Shaw’s D85 to 86 ASTM D2240
Shaw’s D86 to 88 ASTM D2240
Shaw’s D86 to 87 ASTM D2240
Tensile modulus ASTM D638
2100 to 2320MPaASTM D638
2540 to 2920MPaASTM D638
2580 to 2620MPaASTM D638
tensile strength ASTM D638
46.6 to 47.8MPaASTM D638
56.1 to 56.9MPaASTM D638
69.2 to 69.6MPaASTM D638
Tensile strain ASTM D638
fracture5.0 to 12%ASTM D638
fracture4.0 to 9.0%ASTM D638
fracture13 to 19%ASTM D638
Bending modulus ASTM D790
2440 to 2520MPaASTM D790
2500 to 2700MPaASTM D790
2130 to 2310MPaASTM D790
bending strength ASTM D790
85.0 to 87.0MPaASTM D790
92.1 to 98.1MPaASTM D790
73.0 to 75.0MPaASTM D790

Notes
1. Typical properties: these are not to be construed as specifications.
2. UV Postcure at HOC +3
3. UV Postcure & Thermal Postcure
4. UV Postcure at HOC -2
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