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3M Novec 2708 Electronic Grade Coating Product Analysis
Product Overview
3M Novec 2708 Electronic Grade Coating is a high-solids, single-component fluorinated polymer solution based on 3M Novec 7200 Engineered Fluid, with less than 5% PGMEA. This product incorporates the UV-fluorescent detection feature characteristic of the Novec electronic coating series, containing a built-in yellow-orange dye that emits clear fluorescence under UV light, greatly facilitating coating coverage inspection and process quality control. Designed to provide long-lasting moisture and corrosion protection for printed circuit boards and electronic components, it dries to form a transparent, ultra-thin protective film with excellent hydrophobic and oleophobic properties. The coating requires no curing, offers easy application, and maintains strong environmental credentials including non-flammability, zero ozone depletion potential, low toxicity, low global warming potential, RoHS compliance, and low VOC content.
Physicochemical Properties Analysis
1.Optimized High-Solids Fluid Characteristics
Novec 2708 has a density of 1.4 g/ml (@23°C), a boiling point of 79°C, and no flash point as tested by the closed-cup method, ensuring safe storage and use. With a viscosity of 4.9 cP, it is suitable for dip, brush, and selective dispensing processes. The coating achieves handling capability within two minutes at room temperature, supporting efficient continuous production.
2.Exceptional Dry Film Performance
The cured coating demonstrates excellent thermal stability, maintaining protective performance after 24 hours at 175°C, and has a glass transition temperature (Tg) of 53°C. Static contact angles are 105° (water) and 65° (hexadecane), confirming outstanding dual-phobic properties. Electrically, it offers a dielectric constant of 3.2 (@1kHz), a dissipation factor of 0.001, and a high dielectric strength of 2500 V/mil, providing reliable insulation for high-reliability electronic devices.
Application Performance and Solutions
Suited for High-Protection Electronic Manufacturing
With its higher solids content and adjustable film thickness, Novec 2708 is particularly suitable for electronic assemblies requiring enhanced barrier protection, such as outdoor equipment, automotive electronics, and industrial control systems. Its fluorescent detection feature provides an additional process verification method for these high-reliability applications, ensuring complete coating coverage without omission.
Comprehensive Protection and Process Compatibility
The coating effectively resists moisture, chemical vapors, and various liquid contaminants, preventing adhesion of lubricants, silicones, photoresists, and other pollutants. It also supports solder-through rework, maintaining flexibility during both manufacturing and repair stages. It exhibits good adhesion to a variety of substrates including metals, glass, ceramics, plastics, and composite materials.
Technical Advantages and Process Benefits
Dual Benefits of Controllable Thickness and Visible Quality
The higher solids content provides users with a wider film thickness adjustment range, allowing optimization for different protection needs. Combined with UV-fluorescent inspection, this enables dual process control over both thickness and coverage, significantly improving product consistency and reliabilit
Convenient Application for Multiple Processes
The coating is compatible with spray, dip, brush, and selective dispensing methods and can be diluted with Novec 7200 Engineered Fluid to adapt to different production lines and equipment requirements. For rework, it can be dissolved and removed using Novec 72DA (preferred) or 7200 Engineered Fluid.
Long-Term Stability and Compliance Assurance
Throughout the product's lifecycle, its stable chemical properties and durability ensure long-lasting protective performance. Meanwhile, environmental features such as low VOC and halogen-free composition help users easily comply with increasingly stringent environmental regulations.
Novec 2708,Electronic Grade Coating,Nano coating,Electronic moisture-proof coating
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