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Plastics & Elastomers
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Plastics & Elastomers
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Somos® ProtoGen 18420

Technical Datasheet | Supplied by Covestro
Somos® ProtoGen 18420 is a liquid photopolymer grade. It is an easy to clean, 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, high heat 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 18420 show 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 18420 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
1.16 g/cm3
(At 25°C)
Water Absorption
0.61 %
(UV & Thermal Postcure)
ASTM D570-98
Water Absorption
0.61 %
(UV & Thermal Postcure)
ASTM D570-98
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