Master Bond UV10DCTK is a new one component UV and/or heat curable modified epoxy resin system for high performance bonding, coating and surface mount applications. It is a flowable paste at ambient temperatures with excellent long term storage characteristics in the absence of light and/or heat. When exposed to a source of UV light or heat, this compound cures readily to strong chemically resistant bonds and coatings. The cured UV10DCTK compound can be used over the wide temperature range of -60°F to 300°F. For UV curing, the maximum absorption is found in the 300-360 nanometer range. The dual cure capability of the Master Bond UV10LVTK compound in an oven at 220-250°F for approximately 20 minutes. The dual cure capability of the Master Bond UV10DCTK greatly enhances the utility of UV curing technology by extending its applicability to assemblies comprising both optically opaque and transparent components. It is particularly well suited for surface mount application where a component can be "fixed" by the UV light and then be completely bonded by the heat.

The Master Bond UV10DCTK resin system is not oxygen inhibited and does not require an inert atmosphere for either UV or thermal cures. Unlike most other UV curing systems the UV10DCTK compound can be cured in a wide range of section thickness up to 1/4" and more. Long term durability of bonded assemblies and coatings is excellent even when exposed to adverse environmental conditions including heat and moisture, chemicals, etc. Master Bond UV10DCTK exhibits high physical strengths

and superior chemical resistance to inorganic chemicals including acids, bases and salts as well as organic chemicals such as most common solvents. High strength bonds are obtained with metals, ceramics, glass, paper, many plastics and elastomers. The compound is 100% reactive and does not contain any solvents or diluents. Cures are effected with minimal shrinkage. Master Bond UV10DCTK superior performance profile is due to its unique chemical composition which includes an exceptionally effective UV curing agent and a superior thermally curing catalyst. The fast UV curing mechanism is triggered by exposure to commercially available 200 watt/linear inch medium pressure mercury vapor lamps or similar equipment.

With such commercial UV lamps cures can be effected in remarkably short time periods, e.g., 1 minute or less at ambient temperatures. When lower intensity UV lamps are employed somewhat longer curing times are necessary. As noted oven cures can be achieved at 220-250°F in approximately 20 minutes. Storage stability of the Master Bond UV10DCTK compound exceeds three (3) months under conventional storage conditions in unopened containers.