Acrylics Conformal coating 1B31

Model No:	1B31

HumiSeal® 1B31 is a fast drying, single component, acrylic conformal coating that provides excellent moisture and environmental protection for printed circuit assemblies. HumiSeal® 1B31 demonstrates excellent flexibility, fluoresces under UV light for ease of inspection and is easily repaired.

Product Enquiry

HumiSeal® 1B31 conformal coating is:

an acrylic chemistry
fast drying
single component

HumiSeal®1B31 conformal coating has:

excellent moisture and environmental protection for printed circuit assemblies
excellent flexibility
fluorescence under UV light for ease of inspection
rework ability with ease
MIL-I-46058C qualification
IPC-CC-830 compliance
RoHS Directive 2002/95/EC compliance

Application of HumiSeal® 1B31 Conformal Coating

Conformal coatings can be successfully applied to substrates that have been cleaned prior to coating and also to substrates assembled with low residue “no clean” materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level.

Specification:

Product Specification
Density, per ASTM D1475	0.91 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044	35 ± 3 %
Viscosity, per Fed-Std-141, Meth. 4287	200 ± 15 centipoise
VOC	592 grams/liter
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, 521EU
Recommended Stripper	Stripper 1080, 1080EU
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_g340 ppm/°C above T_g
Glass Transition Temperature – DSC	14°C
Modulus – DMA	2000 MPa @ -40°C1050 MPa @ 20°C8.5 MPa @ 60°C
Flammability, per MIL-I-46058C	Self-Extinguishing
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 10¹⁰ohms (60GΩ)
Fungus Resistance, per ASTM G21	Passes