A special dual-cure (UV/heat-curable) epoxy system called UV15DC80 is designed for bonding, sealing, coating, and potting applications. This compound has a low viscosity, is easy to apply, and requires no mixing. Environmentally friendly, it is 100% solid and contains no solvents or volatiles.
UV15DC80 is not inhibited by oxygen and has low shrinkage upon cure. Particularly noteworthy is that UV15DC80 can cure in shadowed areas by supplemental heat curing at 80°C for 15 to 30 minutes. Straight UV curing can be accomplished for thicknesses of .010/.020 in. in seconds using UV light at 365 nm with 30 to 40 mw/cm of energy. Faster cures can be achieved at higher energy outputs. Post curing at 125 to 135°C for 15 to 30 minutes can increase the Tg from 90°C achieved by a straight UV cure to over 130°C.
UV15DC80 has high physical strength properties. Adhesion to metals, glass, ceramics, and most plastics is excellent. It has superior chemical resistance. Shore D hardness is >70 and its elongation after cure is 3 to 4%. UV15DC80 has a tensile strength of >4,200 psi and a tensile modulus of 120,000 psi. Its refractive index is 1.517. Storage stability of UV15DC80 is 6 months at room temperature in the original unopened containers. It is available for use in half-pint, pint, quart, gallon, and 5-gallon pail containers. For ease of use, it also is available in syringe applicators.
- Allows for curing in “shadowed out” areas
- Cures at temperatures as low as 80°C
- Convenient no-mix system
- Excellent physical strength properties
