1. Product Description
U-680 is a three-proof paint that cures both UV and moisture, featuring outstanding "moisture-proof", "salt spray-proof" and "mold-proof" properties. High solid content, low odor, and environmentally friendly. It is used for sealing and protection of products such as PCB boards, electronic appliances, and precision machinery. It has excellent electrical insulation performance and chemical resistance.
2. Product Features:
2.1 Performance: Single-component, low viscosity, and dual curing by UV and moisture.
2.2 It is easy to operate and suitable for various processes such as spraying, dipping, brushing and flow coating.
2.3 Adhesion: It has good adhesion to various circuit boards.
2.4 Physical Properties: Resistant to high and low temperatures, the paint film has good elasticity and adhesion at -60℃.
2.5 Electrical insulation performance: It has excellent electrical insulation and dielectric strength.
2.6 Chemical properties: Resistant to salt spray, corrosion and aging.
2.7 Moisture-proof, shock-proof, dust-proof, water-proof and mold-proof.
3. Usage
3.1 Civil and Commercial applications
Conformal coating can provide protection for the electronic circuits in household appliances, enabling them to resist:
3.1.1 Water and detergent (washing machines, dishwashers, bathroom products, outdoor electronic LED screens);
3.1.2 Unfavorable external environment (display screens, anti-theft and fire alarm devices, etc.);
3.1.3 Chemical substance environment (air conditioning, dryer);
3.1.4 Hazardous substances in offices and homes (computers, induction cookers);
3.1.5 All other circuit boards that require three-proof protection;
3.2 Automotive Industry
The automotive industry requires conformal coating to protect circuits from the following hazards, such as gasoline evaporation, salt spray/brake fluid, etc. The application of electronic systems in automobiles is growing rapidly and continuously. Therefore, the use of conformal coating has become a basic requirement to ensure the long-term reliability of automotive electronic devices.
3.3 Aerospace
Due to the particularity of the usage environment, the aviation and aerospace environments have strict requirements for electronic equipment. Especially under the conditions of rapid pressurization and depressurization, good circuit performance must still be maintained. The pressure resistance stability of conformal coating has thus been widely applied.
3.4 Navigation
Whether it is fresh water or salty seawater, both can cause damage to the electrical circuits of ship equipment. The use of conformal coating can provide maximum protection for equipment on the water surface and even submerged and underwater.
3.5 Medical Care
Conformal coating can protect electronic devices from the erosion of external chemical agents and special usage environments, ensuring their continuous stability.
4. Technical parameters
4.1 Before Curing
Serial number | Performance indicators | U-680 | enforce standards |
1 | Appearance | A pale yellow transparent liquid | Visual inspection |
2 | Smell | Slight | Senses |
3 | Density（g/cm³，23℃） | 1.1 | GB/T1756-79 |
4 | Viscosity (mPa.S，23℃) | 92.5 | GB/T22235-2008 |
5 | Solid content | >98% | GB/T1981.2-2009 |
6 | Curing method | Pump lamp + moisture | —— |
7 | Completely cured（mJ/cm2） | 900-1500 | —— |
8 | UV surface drying time（s)/1000W以上 | 3-20 | —— |
9 | Moisture curing time（23℃ RH50%） | 48-72h | —— |
4.2 Mechanical and Thermal Properties (After Curing)
4.3漆膜介电性能（固化后）
Serial number | Inspection items | Result | Test conditions | Test method |
Dielectric constant | 3.8381 | Applied voltage :1000VDC, application Voltage application duration :1 minute | GB/T1409-2006 | |
2 | Electrical intensity |
21.05 | Voltage application rate :200VAC/s, frequency: 50Hz, temperature :22°C, test medium: transformer oil | GB/T14081-2016 |
3 | Surface resistivity | 4.97×1011 | The applied voltage is 100V DC Voltage application duration: 1 minute | GBT 1981.2-2009 |
4 | Volume resistivity | 9.663×1013 | 100V DC Voltage application duration: 1 minute | GB/T 31838.2-2019 |
5 | Coefficient of thermal expansion | 220.41 | T:-50℃ to 150℃ Rate: 10℃/min | IPC-TM-650 2.4.24C:1994 |
4.4防腐性能（固化后）
Serial number | Inspection items | Conditions | Result | Test method |
1 | Salt spray test （168h） | 50g/L NaCl solution | The paint film showed no signs of loss of gloss, wrinkling, cracking, peeling or rusting | |
2 | Temperature: 85℃ Humidity: 85% | The paint film showed no loss of gloss, wrinkling or peeling | IPC-TM-6502.6.3.3B | |
3 | 5% NH4Cl 5% Na2CO3 | The paint film showed no signs of loss of gloss, discoloration, wrinkling or peeling | GB1763-1979(1989) | |
4 | Water absorption rate | Bake at 105℃ for 1 hour, soak for 24 hours, and weigh | 0.74% | HG/T3856-2006 |
5 | Acid value | KOH (soluble in ethanol) concentration: 0.05mol/L | 35.9mgKOH/g | GB/T 1981.2-2009 |
6 | Solvent vapor resistant(168h) | Suspend the sample vertically 150mm above the water and acetone (1:1) solution for 168 hours | The paint film showed no signs of damage such as peeling, sagging or bubbling | GB/T1981.2-2009 |
5. Application process:
5.1 Pre-treat the workpiece to be coated to remove the oxide layer, oil stains, impurities, moisture and other contaminants from its surface.
5.2 According to the structure and process requirements of the workpiece, the construction methods of spraying, dipping and brushing can be selected.
5.3 During the spraying operation, a thinner can be used to adjust the viscosity to an appropriate level (U-680 will react and cure when in contact with water. Pay attention to the moisture content of the thinner. Before use, a small amount of thinner must be used for testing to confirm safety before adding). Adding thinner may affect the curing speed. If necessary, increase the curing dosage.
6. Precautions
When in use, wipe the glue off the bottle mouth clean and tighten the bottle cap. Opened packaging that needs to be stored must be tightly protected and used up as soon as possible.
Personal protective measures should be taken during operation to prevent the operator from inhaling the product in the form of vapor and mist.
7. Storage and Transportation:
The storage period of this product is 9 months (below 25℃). When stored at room temperature, do not place it in damp, direct sunlight, radiation, high-temperature areas or places out of reach of children.
2. This type of product is non-hazardous and can be transported as general chemicals.
8. Packaging specifications:
Model: U-680
Packaging method: 1KG/5KG
Compiled by Zhejiang Youli New Materials Co., LTD
