Epoxy Technology EPO-TEK® 305 Spectrally Transparent Epoxy

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Epoxy Technology EPO-TEK® 305 Spectrally Transparent Epoxy
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	Product Description: EPO-TEK® 305 is a two component, semi-rigid, optical grade epoxy for semiconductor packaging of fiber optics, optoelectronics and medical devices. It is an electrically and thermally insulating epoxy. Advantages & Application Notes: Capable of transmitting light in the UV range. %Transmission from 248 to 400 nm may be realized. Tg and Shore D values are indicative of a somewhat “semi flexible or semi rigid” epoxy. It can be used for low stress applications in optics. Low viscosity, water-like epoxy formulation. This allows for application by pouring, dip coating, brushing, or microdispensing methods. Versatility in curing from 23°C to 80°C range. This allows many types of low cost plastic substrate or housings to be used. Suggested applications: Optics: Index matching epoxy for adhesive and coating applications with Scientific / OEM instruments and sensor devices LED potting and encapsulation; LCD glass-glass or glass-PET laminations Fiber Optics: potting or sealing the fiber into the snout of the opto-package in order to provide stress relief. PCB / General: low stress potting of electronics as a clear encapsulant, COB glob top encapsulant. Information Provided by Epoxy Technology
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Physical Properties	Metric	English	Comments

Specific Gravity	0.870 g/cc	0.870 g/cc	Part B
	1.25 g/cc	1.25 g/cc	Part A
Viscosity	150 - 250 cP @Temperature 23.0 °C	150 - 250 cP @Temperature 73.4 °F	100 rpm

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	66	66
Tensile Modulus	0.692 GPa	100 ksi	Storage
Shear Strength	13.0 MPa	1880 psi	Lap
	>= 23.4 MPa	>= 3400 psi	Die

Electrical Properties	Metric	English	Comments
Volume Resistivity	<= 2.00e+13 ohm-cm	<= 2.00e+13 ohm-cm
Dielectric Constant	4.46 @Frequency 1000 Hz	4.46 @Frequency 1000 Hz
Dissipation Factor	0.026 @Frequency 1000 Hz	0.026 @Frequency 1000 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	31.0 µm/m-°C	17.2 µin/in-°F	Below Tg
	148 µm/m-°C	82.2 µin/in-°F	Above Tg
Maximum Service Temperature, Air	100 °C	212 °F	Continuous
	200 °C	392 °F	Intermittent
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F	Continuous
	-55.0 °C	-67.0 °F	Intermittent
Glass Transition Temp, Tg	>= 35.0 °C	>= 95.0 °F	Dynamic Cure 20—200°C /ISO 25 Min; Ramp 10—200°C @ 20°C/Min
Decomposition Temperature	270 °C	518 °F	Degradation Temperature

Optical Properties	Metric	English	Comments
Refractive Index	1.4763 @Wavelength 589 nm	1.4763 @Wavelength 589 nm	uncured
Transmission, Visible	>= 91 % @Wavelength 250 nm	>= 91 % @Wavelength 250 nm	Spectral
	>= 97 % @Wavelength 300 nm	>= 97 % @Wavelength 300 nm	Spectral
	>= 98 % @Wavelength 400 - 1600 nm	>= 98 % @Wavelength 400 - 1600 nm	Spectral

Processing Properties	Metric	English	Comments
Cure Time	60.0 min @Temperature 65.0 °C	1.00 hour @Temperature 149 °F
	1440 min @Temperature 23.0 °C	24.0 hour @Temperature 73.4 °F
Pot Life	60 min	60 min
Shelf Life	12.0 Month @Temperature 25.0 °C	12.0 Month @Temperature 77.0 °F

Descriptive Properties
Color	Clear/Colorless		Part A
	Clear/Colorless		Part B
Consistency	Pourable liquid
Mix Ratio by Weight	100:2.8
Number of Components	Two
Weight Loss	1.22%		200°C
	3.99%		250°C

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PPOXYT111 / 141150

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