Dual-Cure UV3342LV-80 UV/Moisture-Cure Conformal Coating

SEAYU® UV3342LV-80 is a single component, UV curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, thermal shock resistance and moisture resistance. The material is tack-free after exposure to UV light. A secondary moisture cure mechanism will cure unexposed areas of the coating at ambient conditions. This coating fluoresces a bright blue when exposed to UV light (365nm) for easy inspection of coating coverage. SEAYU ® UV3342LV-80 is recognized under UL File Number E479913, and is in full compliance with the RoHS directives 2015/863/EU and 2011/65/EU.

FEATURES

UV Light Cure
Bright Blue Fluorescing
Secondary Moisture Cure
Excellent Adhesion
Solvent-Free
Chemical Resistance
Halogen-Free
Moisture Resistance
Low Odor
Thermal Shock Resistance

TECHNICAL DATA

Typical Properties of Uncured Material
Chemical Class	Acrylated Urethane
Appearance	Translucent Liquid
Density (g/cm³)	1.05
Viscosity (mPa.s) GB/T2794-2013	60-120
Recommended Coating Thickness（μm）	25-75

TECHNICAL CURING PERFORMANCE

Recommended UV Cure Condition(s)

High pressure mercury vapor lamp:Intensity(50mW/cm²)

Recommended Moisture Cure Condition (h)

70% RH@ 25°C

TYPICAL PROPERTIES OF CURED MATERIALS

Hardness(A) GB/T2411-2008	70-80
Adhesion GB/T 9286-1998	5B
Tensile at Break (MPa)	1.6
Elongation at Break (%) GB/T1040-2006	52
Modulus of Elasticity (MPa) at 25℃,DMA	732
Glass Transition Temperature (˚C) TMA	6
Coefficient of Thermal Expansion（ppm/˚C TMA	77/Below Tg 220/Above Tg
Water absorption (% @25℃, 24h) ISO 62:2008	0.32
Dielectric Withstand Voltage (V) IPC-TM-650 2.5.7.1:2000	>1500
Dielectric Constant (1 MHz)	3.04
Dissipation Factor (1 MHz)	0.012
Volume Resistivity (ohm-cm)	1.8×10^16
Surface Resistivity (ohm)	1.0×10^16
Comparative tracking index (CTI) GB/T 4207-2012	600
Flammability	UL 94V-0
Recommended Operating Temperature (℃)	-40 ~130
Moisture and Insulation Resistance IPC-TM-650 2.6.3.4A (65℃/90%RH)	Pass
Fungus Resistance IPC-TM-650 2.6.1.1	Pass
Temperature Shock Test -40 to +110℃, 500 cycles	Pass
Salt Spray Test GB/T 1771-2007(168H)	Pass

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