The originally red material changes to clear once exposed to UV light, indicating that there is UV light access across the adhesive material. Although this change in colour does not indicate a full cure it does confirm that the UV light has reached the polymer. By giving visual feedback, UV15RCL is said to offer processing and handling advantages over conventional systems.
According to Master Bond, curing under UV light typically takes 30-60 seconds, with a broad-spectrum UV lamp emitting light with a wavelength range between 320-365 nm. The minimum energy required is 20-40 milliwatts per cm2.
UV15RCL features a high glass transition temperature (Tg) of 90-95°C. However, when post cured for 1-2 hours at 125°C, the Tg can increase to 125-130°C. It has a service temperature range from -80°F to +350°F. This non-solvent based system cures tack free and has a low viscosity of 115-350 cps, making it ideal for spin coating. It is not oxygen inhibited and provides light transmission properties and good optical clarity, with a refractive index of 1.517. Also, it is an electrical insulator with a volume resistivity exceeding 1014 ohm-cm.
UV15RCL is suitable for bonding and sealing applications as it adheres well to metals, glass, ceramics and many plastics, including acrylics and polycarbonates. It is available in a range of packaging options, including syringes, ½ pint, pint, quart and gallon containers.
