HumiSeal® 1B73D is a high-performance, single-component, fast-drying acrylic conformal coating designed specifically for printed circuit assemblies (PCAs). This advanced formulation delivers exceptional flexibility and electrical properties, making it a reliable choice for protecting sensitive electronic components. With enhanced application features and compliance with industry standards, HumiSeal® 1B73D is a go-to solution for modern electronics manufacturing.
HumiSeal® 1B73D Features
Properties Specific to HumiSeal® 1B73D or 1B73D/600 PB54
Property | 1B73D | 1B73D/600 PB54 |
Density (per ASTM D1475) | 0.92 ± 0.02 | 0.925 ± 0.025 |
Solids Content (% by weight, per Fed-Std-141, Meth. 4044) | 29.5 ± 2 | 19 ± 2 |
Viscosity (per Fed-Std-141, Meth. 4287) | 262 ± 20 | 54 ± 5 |
VOC (grams/litre) | 661 | 749.2 |
Properties of HumiSeal® 1B73D and 1B73D/600 PB54
Property | Value |
Drying Time to Handle (per Fed-Std-141, Meth. 4061) | 30 minutes |
Recommended Coating Thickness | 25 – 75 microns |
Recommended Curing Conditions | 24 hrs @ RT or 2 hrs @ 76°C |
Time Required to Reach Optimum Properties | 7 days |
Recommended Thinner | HumiSeal® Thinner 73 |
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) | 67 ppm/°C |
Glass Transition Temperature (DSC) | 42°C |
Modulus (DMA) | 11.1 MPa |
Flammability (per UL 94) | V-1 |
Dielectric Withstand Voltage (per MIL-I-46058C) | >1500 volts |
Dielectric Breakdown Voltage (per ASTM D149) | 6300 volts |
Dielectric Constant (at 1MHz and 25°C, per ASTM D150-98) | 2.6 |
Dissipation Factor (at 1MHz and 25°C, per ASTM D150-98) | 0.01 |
Insulation Resistance (per MIL-I-46058C) | 5.5 x 10¹⁴ ohms (550TΩ) |
Moisture Insulation Resistance (per MIL-I-46058C) | 7.0 x 10¹⁰ ohms (70GΩ) |
Fungus Resistance (per ASTM G21) | Passes |
Maximum Operating Temperature | 150°C |