Acrylics Conformal coating 1R32A-2

Model No:	1R32A-2

HumiSeal® 1R32A-2 is a fast drying, single component acrylic coating, formulated for improved adhesion to typical substrates while providing excellent moisture and environmental protection for printed circuit assemblies. HumiSeal® 1R32A-2 fluorescence under UV light for ease of inspection and is easily repaired.

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Cleanliness of the substrate is of extreme importance for the successful application of a conformal coating. Surfaces must be free of moisture, dirt, wax, grease, flux residues and all other contaminants. Contamination under the coating could cause problems that may lead to assembly failures.

Specification:

Product Specification
Density, per ASTM D1475	0.91 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044	35 ± 2 %
Viscosity, per Fed-Std-141, Meth. 4287	220 ± 30 centipoise
VOC	600 grams/litre
Drying Time to Handle per Fed-Std-141, Meth. 4061	10 minutes
Recommended Coating Thickness	25 – 75 microns
Recommended Curing Conditions	24 hrs @ RT or 30 min @ 76°C
Time Required to Reach Optimum Properties	7 days
Recommended Thinner (dipping & brushing)	HumiSeal Thinner 503
Recommended Thinner (spraying)	HumiSeal Thinner 521
Recommended Stripper	HumiSeal Stripper 1080
Shelf Life at Room Temperature, DOM	24 months
Thermal Shock, 50 cycles per MIL-I-46058C	-65°C to 125°C
Coefficient of Thermal Expansion – TMA	170 ppm/°C below T_g 340 ppm/°C above T_g
Glass Transition Temperature – DSC	14°C
Modulus – DMA	2000 MPa @ -40°C 1050 MPa @ 20°C 8.5 MPa @ 60°C
Flammability, per UL 94	V-0
Dielectric Withstand Voltage, per MIL-I-46058C	>1500 volts
Dielectric Breakdown Voltage, per ASTM D149	7500 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-98	2.5
Dissipation Factor, at 1MHz and 25°C, per ASTM D150-98	0.01
Insulation Resistance, per MIL-I-46058C	8.0 x 10¹⁴ ohms (800TΩ)
Moisture Insulation Resistance, per MIL-I-46058C	6.0 x 10¹⁰ ohms (60GΩ)
Fungus Resistance, per ASTM G21	Passes