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DSM Somos® ProtoGen™ 18920 Liquid Photopolymer, UV & Thermal Postcure
Categories: Polymer; 3D Printing/Additive Manufacturing Polymer

Material Notes: Product Description

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.

Information Provided by DSM Desotech Inc.

Vendors:
Proto3000 provides design tools, 3D printers, additive manufacturing processes, metrology technologies, high-performance materials, and part-finishing automation. Our ISO 9001:2015 additive manufacturing production facility offers 3D printing services, rapid prototyping services, and end-part production with HP MultiJet Fusion (MJF), FDM, SLA, SLS, Polyjet, DLP, metal binder jetting, BMD, and DMLS.

Axis Proto Inc. North American leaders in producing fast Rapid Prototyping and Additive Manufacturing solutions using all major 3D printing methods including SLA printing systems. Free 3D printing quotes at www.axisproto.com

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Physical PropertiesMetricEnglishComments
Density 1.16 g/cc
@Temperature 25.0 °C
0.0419 lb/in³
@Temperature 77.0 °F
Water Absorption 0.38 %0.38 %ASTM D570-98
Viscosity 350 cP
@Temperature 30.0 °C
350 cP
@Temperature 86.0 °F
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 86 - 8886 - 88ASTM D2240
Tensile Strength, Yield 69.2 - 69.6 MPa10000 - 10100 psiASTM D638M
Elongation at Break 4.0 - 9.0 %4.0 - 9.0 %ASTM D638M
Tensile Modulus 2.544 - 2.916 GPa369.0 - 422.9 ksiASTM D638M
Flexural Strength 92.1 - 98.1 MPa13400 - 14200 psiASTM D790M
Flexural Modulus 2.504 - 2.696 GPa363.2 - 391.0 ksiASTM D790M
Izod Impact, Notched 0.200 - 0.240 J/cm0.375 - 0.450 ft-lb/inASTM D256A
 
Electrical PropertiesMetricEnglishComments
Dielectric Constant  3.04
@Frequency 1e+6 Hz
3.04
@Frequency 1e+6 Hz
ASTM D150-98
 3.23
@Frequency 1000 Hz
3.23
@Frequency 1000 Hz
ASTM D150-98
 3.28
@Frequency 60.0 Hz
3.28
@Frequency 60.0 Hz
ASTM D150-98
Dielectric Strength 14.3 - 15.2 kV/mm363 - 386 kV/inASTM D149-97a
 
Thermal PropertiesMetricEnglishComments
CTE, linear  64.7 µm/m-°C
@Temperature -40.0 - 0.000 °C
35.9 µin/in-°F
@Temperature -40.0 - 32.0 °F
ASTM E831-05
 74.2 µm/m-°C
@Temperature 0.000 - 50.0 °C
41.2 µin/in-°F
@Temperature 32.0 - 122 °F
ASTM E831-05
 79.2 µm/m-°C
@Temperature 50.0 - 100 °C
44.0 µin/in-°F
@Temperature 122 - 212 °F
ASTM E831-05
 138.8 µm/m-°C
@Temperature 100 - 150 °C
77.11 µin/in-°F
@Temperature 212 - 302 °F
ASTM E831-05
Deflection Temperature at 0.46 MPa (66 psi) 96.5 °C206 °FASTM D648-98c
Deflection Temperature at 1.8 MPa (264 psi) 78.6 °C173 °FASTM D648-98c
Glass Transition Temp, Tg 97.5 °C208 °FASTM E1545-00
 
Descriptive Properties
AppearanceGray
Dp (mm)4.2Slope of cure-depth vs. ln(E) curve
E10 (mJ/cm2)76Exposure that gives 0.254mm thickness
Ec (mJ/cm2)7Critical exposure

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PDSMT011 / 93531

Aluminum Castings

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