Black&Light Technology

Conventional black adhesives are absorbing a high percentage of light intensity. For this reason, uv curable adhesives are generally transparent. If common black adhesives are cured with uv light, they cure only in very small layers of a few microns. This results in surface “skin” formation, but not a complete cure. Usually, a secondary curing mechanism is then necessary, for example with heat.

With the new “Black&Light” technology from Panacol black adhesives can now be cured in deeper layers up to a few millimeters with uv light. During the curing process, the “Black & Light” technology within the adhesive enables the UV rays to penetrate and complete a full cure.  Once the adhesive polymerization is complete, the structure of the "Black & Light" technology prohibits light transmission. Thus, black adhesives with high optical density can now be cured in a single curing step with uv light only. This process is irreversible.

These new “Black&Light” adhesives are mainly targeted at applications in optical bonding and optoelectronics where high optical density is needed. They are also suitable for optoelectronic applications to help minimize reflections and enhance sensor transmission values, or the black uv epoxies can be applied as glob top or encapsulation.

The “Black&Light” technology is compatible with most epoxy-based Vitralit® adhesives from Panacol. The technology has no influence on the halogen content. The "Black & Light" adhesive systems can be very specifically adapted to specifications of the respective application for amount of light blocking and depth of cure.

Another major advantage of the "Black&Light" adhesives is storage: As the the "Black & Light" epoxy adhesives do not cure at room temperature or elevated temperatures, they can be stored and shipped at room temperature or under normal refrigeration and need not to be stored deep-frozen.

Black and Light: UV curable black epoxies

A black epoxy coating with 1mm thickness is being cured with UV LED light