Product Description:
DX-7553 is a single component, low viscosity, UV/moisture dual curing conformal coating that can be brushed or sprayed onto surfaces of printed circuit boards, electronic components, integrated circuits, etc. After UV irradiation and curing, a dense conformal coating is formed to protect various components. The product contains a fluorescent indicator, which is easy to detect after spraying.
DX-7553 UV cured conformal coating does not contain any volatile solvents and can cure within seconds. Therefore, it can improve processing speed, increase output, and reduce costs.
Typical use:
Conformal coating for electronic circuit, waterproof, mildew proof, corrosion proof and anti-aging.
Especially suitable for circuit board coating protection in smart meters, household appliances, industrial control, and automotive electronics industries.
Product Features:
1、 Non hazardous chemicals
2、 Single component, solvent-free, economical and environmentally friendly
3、 Excellent salt spray resistance
4、 Excellent resistance to high and low temperatures
5、 Excellent waterproof and moisture-proof performance
6、 Excellent insulation, anti leakage, and anti corona performance
7、 Long opening time before glue application, rapid curing after glue application
8、 Non corrosive, non-toxic before and after curing
Liquid performance:
| Main chemical components |
Polyurethane acrylic acid |
| Solvent content |
Does not contain non reactive solvents |
| Color of rubber material |
Light amber liquid |
| Density(g/cm) |
1.05 |
| Viscosity(mPa.s) |
150-300 |
Dry film performance:
| Working temperature (℃) |
-30-135 |
| Hardness（Shore A） |
D70 |
| Adhesion (grade) |
1 |
| Flexibility |
1mm |
| Water resistance level |
Good |
| Waterproof level |
IPX5 |
| Surface dryness |
50s |
| Surface hardness |
2H |
| Coefficient of thermal expansion a1.μm/m/℃ |
148 |
| Tensile strength（Mpa） |
15.8 |
| Dielectric constant（1 MHz） |
4.09 |
| Dielectric loss factor（1 MHz） |
0.06 |
| Dielectric breakdown voltage KV/mm（V/mil） |
43（1.100） |
| Volume resistivity、ohm-cm |
1.63X10 |
| Surface resistivity、ohm |
2.06x10 |
| Refractive index(20℃) |
1.51 |
| Water absorption rate、%(2h) |
3 |
| High temperature and high humidity（H） |
240 |
| Flame retardant（UL 94） |
V-0 |
solidification:
The UV curing rate depends on the intensity, wavelength, coating thickness, and distance from the UV lamp to the coating. For areas that are not exposed to ultraviolet radiation, the moisture curing mechanism plays a role. After UV irradiation, the surface can be dried at room temperature for about 1 day. To achieve final performance, it usually takes 5-7 days, depending on the coating thickness, temperature and humidity in the operating room. The type of light source also affects the curing rate. DX-7553 is suitable for various types of ultraviolet lamps, and the UV energy meter can accurately measure the energy required for curing, which has strong guiding significance for the selection of curing processes. The recommended curing energy is as follows:
| Energy |
Light intensity |
| UVA：800-3000mJ/cm2 |
200-2000mw/cm2 |
| UVB:300-2000mJ/cm2 |
100-2000mw/cm2 |
| UVC:130-1000mJ/cm2 |
60-500mw/cm2 |
| UVV:800-3000mJ/cm2 |
200-2000mw/cm2 |
Usage:
1、 Ensure good ventilation at the construction site.
2. The surface of the PCB should be free of oil stains, dust, impurities, etc.
3、 According to the structure and process requirements of the workpiece, spraying, immersion coating, and brushing coating construction methods can be selected.
4、 When spraying, the spray gun should move smoothly, and the spraying adhesive layer should be evenly thick, without accumulation or shortage of adhesive.
Precautions:
1、 During construction, open flames should be strictly prohibited, and work clothes that are prone to static electricity should be avoided. Glue should be applied in a ventilated environment
2、 The thinner the adhesive coating, the faster the curing process
3、 The spraying speed should be appropriate to avoid the generation of bubbles
4、 The adhesive solution retained after spraying should be sealed and stored
5、 For special chemical reactions, please contact our technical department
Packaging specifications:
1L/barrel, 5L/barrel
Storage method:
Store in a sealed environment at a low temperature of 5-30 ℃.
Safety and Health:
This product has no toxic effects and is the same as general chemicals. It cannot come into contact with food or food utensils. It is recommended to maintain sufficient ventilation in the work environment. In case of entering the eyes or mouth, rinse immediately with water. Store in a safe place, away from children.
Declaration:
The technical parameters mentioned in this article are typical values and are not used as product acceptance criteria. They are for reference only. The above data was obtained under standard laboratory conditions, and our company guarantees its reliability. However, due to different working conditions used by users, different surface states of materials, and different curing conditions, some changes in actual performance data are normal phenomena. Storage conditions, transportation, and other factors can all affect the stability, physical and mechanical properties of the adhesive. We are not responsible for any results obtained by anyone using methods beyond our control. It is recommended that users conduct experiments based on the data provided in this article before formal use.
