HumiSeal 1R32 PB120
4 5 (1 evaluate)Category: Acrylic Conformal Coating
Manufacturer: Humiseal
Packaging: 5L, 20L
Origin: UK or USA
Product Specification
| Density, per ASTM D1475 | 0.90 ± 0.02 g/cm³ |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 30 ± 2 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 120 ± 20 centipoise |
| VOC | 630 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 505 |
| 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 Tg 340 ppm/°C above Tg |
| Glass Transition Temperature - DSC | 14°C |
| Modulus – DMA | 2000 MPa @ -40°C 1050 MPa @ 20°C 8.5 MPa @ 60°C |
| 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 |
Application of HumiSeal® 1R32 PB120
For successful application of a conformal coating, it is crucial to ensure the cleanliness of the substrate. Surfaces must be free of moisture, dirt, wax, grease, flux residues, and any other contaminants. Contamination beneath the coating could lead to problems and potential assembly failures.
Dipping
Depending on the complexity, density, and configuration of the components on the assembly, it may be necessary to reduce the viscosity of HumiSeal® 1R32 PB120 with HumiSeal® Thinner 505 to achieve a uniform film. Once the optimum viscosity is determined, maintain a controlled rate of immersion and withdrawal (5-15 cm/min) to ensure even coating deposition. During application, solvent evaporation may increase the viscosity, which can be adjusted by adding small amounts of HumiSeal® Thinner 505. Regular viscosity checks should be performed using a simple measuring device such as a Zahn or Ford viscosity cup.
Spraying
HumiSeal® 1R32 PB120 can be applied using conventional spray equipment. Ensure that spraying is done in a well-ventilated area to effectively carry away vapor and mist. The addition of HumiSeal® Thinner 521 is necessary to achieve a uniform spray pattern and a pinhole-free film. The required amount of thinner and spray pressure will depend on the specific spray equipment and operator technique. A typical ratio of HumiSeal® 1R32 PB120 to HumiSeal® Thinner 521 is 1:1 by volume, although adjustments may be needed for uniform coverage.
Brushing
For brushing applications, HumiSeal® 1R32 PB120 can be used with a small amount of HumiSeal® Thinner 505. The uniformity of the film will depend on component density and the operator's technique.
Storage
Store HumiSeal® 1R32 PB120 in tightly sealed containers, away extreme heat or cold. It can be stored within a temperature range of 0 to 35°C. Prior to use, allow the product to equilibrate for 24 hours at room temperature (18-32°C).
Caution
Application of HumiSeal® Conformal Coatings must be carried out in accordance with local and national health and safety regulations. The solvents in HumiSeal® Conformal Coatings are flammable, so the material should not be used near open flames or sparks. Always use in well-ventilated areas to avoid inhalation of vapors or spray, and avoid contact with skin and eyes. Refer to the MSDS/SDS for detailed safety information before use.
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