DSM Somos® 7120 Epoxy Photopolymer, UV Postcure

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DSM Somos® 7120 Epoxy Photopolymer, UV Postcure (discontinued **)
Categories:	Polymer; 3D Printing/Additive Manufacturing Polymer; Thermoset; Epoxy
Material Notes:	Description DSM Somos® 7120 Photopolymer is a humidity-tolerant, high heat-deflection-temperature, low-curl, high-speed liquid that produces rigid, highly accurate parts. It produces exceptional, undistorted thin walls and down-facing surfaces and exhibits good processing latitude. Application Somos® 7120 Photopolymer is used in the solid imaging process to build three-dimensional 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 providing high quality Rapid Prototyping and Additive Manufacturing solutions using all major 3D printing systems including SLA technology. Free 3D printing quotes at www.axisproto.com Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Metric	English	Comments

Density	1.13 g/cc @Temperature 25.0 °C	0.0408 lb/in³ @Temperature 77.0 °F
Viscosity	700 cP @Temperature 30.0 °C	700 cP @Temperature 86.0 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	88	88	ASTM D2240
Tensile Strength, Yield	58.0 MPa	8410 psi	ASTM D638M
Elongation at Break	2.1 - 6.9 %	2.1 - 6.9 %	ASTM D638M
Modulus of Elasticity	2.477 GPa	359.3 ksi	ASTM D638M
Flexural Strength	108 MPa	15700 psi	ASTM D790M
Flexural Modulus	2.967 GPa	430.3 ksi	ASTM D790M
Izod Impact, Notched	0.270 J/cm	0.506 ft-lb/in	ASTM D256A

Thermal Properties	Metric	English	Comments
Deflection Temperature at 0.46 MPa (66 psi)	<= 70.0 °C	<= 158 °F	ASTM D648

Descriptive Properties
Appearance	Transparent Amber
D_p (mm)	0.123		Slope of cure-depth vs. ln(E) curve
E₁₀ (mJ/cm²)	64		Exposure that gives 0.254mm thickness
E₅ (mJ/cm²)	23		Exposure that gives 0.127mm thickness
E_c (mJ/cm²)	8		Critical exposure

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PDSMT036 / 93556

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