Dow DOWSIL™ MS-4022 Optical Grade Moldable Silicone

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Dow DOWSIL™ MS-4022 Optical Grade Moldable Silicone
Categories:	Polymer; Thermoset; Silicone
Material Notes:	LED lighting grade. DOWSIL™ silicone optical resins help increase design freedom and energy efficiency from high-performance buildings to outdoor-area illumination to advanced automotive styling. Compared to organic options, these specialty silicone liquid resins can maintain outstanding optical properties without yellowing with age under high temperatures. Product applications: LED lamp and luminaire applications Key Features: High light transmittance with low attenuation coefficient High thermal stability Smooth, low-tack plastic-like surface Optically clear Information provided by Dow
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Mechanical Properties	Metric	English	Comments

Hardness, Shore A	85	85	ASTM D2240
Tensile Strength	11.0 MPa	1600 psi	ASTM D412
Elongation at Break	52 %	52 %	ASTM D412

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+16 ohm-cm	1.00e+16 ohm-cm

Optical Properties	Metric	English	Comments
Refractive Index	1.42 @Wavelength 633 nm	1.42 @Wavelength 633 nm
Transmission, Visible	87 % @Thickness 3.20 mm, Wavelength 380 nm	87 % @Thickness 0.126 in, Wavelength 380 nm
	90 % @Thickness 3.20 mm, Wavelength 450 nm	90 % @Thickness 0.126 in, Wavelength 450 nm
	93 % @Thickness 3.20 mm, Wavelength 760 nm	93 % @Thickness 0.126 in, Wavelength 760 nm

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PDOW9969 / 233172

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