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Plastics & Elastomers
The material selection platform
Plastics & Elastomers
by SpecialChem
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Somos® ProtoGen 18920

Technical Datasheet | Supplied by Covestro
Somos® ProtoGen 18920 is a liquid photopolymer grade. It is an acrylonitrile butadiene styrene (ABS)-like grade, producing accurate parts ideal for general purpose. It is the first stereolithography grade to demonstrate different material properties based on machine exposure control. Exhibits superior chemical resistance, a wide processing latitude, excellent tolerance to a broad range of temperature and humidity, both during and after the build. Can be processed be 3D printing method. Parts created from Somos® ProtoGen 18920 exhibit accurate RTV patterns, durable concept models, highly accurate, humidity and temperature resistant parts. Used in solid imaging processes, such as stereolithography to build three-dimensional parts. Recommended for medical, electronic, aerospace and automotive markets.
Product Type
Thermoset, other
Physical Form

Somos® ProtoGen 18920 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
~350 cps
Specific Gravity
~1.16 g/cm3
Water Absorption
0.38 %
(UV & Thermal Postcure)
ASTM D570-98
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