TAGS: Epoxy Coatings UV/EB Technology Acrylic Coatings
Master Bond launches UV15RCL, a low-viscosity epoxy-based UV system for bonding, sealing and coatings. UV15RCL is a cationic curing system with a special color changing feature. The original red material changes to clear once exposed to UV light, indicating that there is UV light access across the adhesive material.
Features High Glass Transition Temperature
Although the change in color from red to clear does not indicate a full cure it does confirm that the UV light has reached the polymer. By giving immediate visual feedback UV15RCL offers processing and handling advantages over conventional systems.
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 cm
2.
UV15RCL features a high glass transition temperature (T
g) of 90-95°C. However, when post cured for 1-2 hours at 125°C, the T
g can increase to 125-130°C. It has a service temperature range from -80°F to +350°F.
The non-solvent based system cures tack free and has a very 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 excellent electrical insulator with a volume resistivity exceeding 1014 ohm-cm.
UV15RCL adheres well to metals, glass, ceramics and many plastics, including acrylics and polycarbonates. It is available in a wide range of packaging options, including syringes, ½ pint, pint, quart and gallon containers.
Source: Master Bond