Electrolube 2K850 two-part, UV cure conformal coating

Electrolube’s 2K850 two-part, UV cure conformal coating combines the speed and convenience of UV cure, enabling an immediate tack-free coating, with the benefits of Electrolube’s 2K conformal coating system, which combines the properties of a resin with the easy application of a coating. The system enables complete cure at room temperature within 24 h, compared to the industry average of about 8–14 days, according to the company.

Most single-part UV cure systems require moisture to diffuse through the UV-cured coating sections. If the material is a decent barrier to humidity, full moisture cure beneath components can be measured in weeks or even months for some components. For sensitive designs, the constant changes in material properties, as the moisture-cure process progresses can affect calibration. In a production scenario, this extended cure time can affect the amount of work in progress (WIP) and require excessive buffering.

The 2K850 product offers advantages over the first generation of single-part UV cure coatings currently available. Users of single-part UV cure coating systems experiencing issues relating to their coating cracking during thermal shock, extended moisture cure processes or both now have a robust alternative solution using their existing production equipment — the only additional requirement is a simple 2K fluid valve modification.

The 2K850 polyurethane system provides a fast processing time with a high level of protection. The UL94V-0, IPC-CC-830C, MIL-I-46058C and IEC 61086 compliant coating features a wide operating temperature range of -40 to +130°C, with good thermal shock performance. It is a tough, flexible, high-performance coating, characterised by good coating thickness (200–400 μm), enhanced edge coverage and good adhesion, hardness and scratch resistance. Ultimately, the coating provides a consistent chemical cure.

Electrolube’s 2K range of hydrophobic coatings provides good water, moisture and condensation protection, including salt mist. This makes 2K850 a suitable choice for automotive, aerospace and other tough electronic applications exposed to harsh conditions.