Optimal adhesion is achieved in bond line thicknesses of 0.001-0.003 inch, and it can cure rapidly with a minimum intensity of 20-40 milliwatts/cm2 using a UV light source emitting at a wavelength of 320-365 nm. The material can also be cured in sections up to 0.125 inch thick under appropriate conditions, making it suitable for bonding, sealing, coating, and encapsulation.
According to Master Bond, UV15-7HP has a strong performance profile, featuring a tensile strength of 6,000-7,000 psi and a tensile modulus of 250,000-300,000 psi at room temperature. This toughened system resists thermal cycling and offers significant elongation of 5-10%. It is an electrically insulative material with a volume resistivity greater than 1014 ohm-cm. Optically clear with a refractive index of 1.54 at 589 nm, it is not oxygen inhibited and contains no solvents or diluents.
UV15-7HP is said to bond well to a variety of substrates including glass, ceramics, metals and many plastics, such as polycarbonates, acrylics and polyester films. This system is serviceable in a range of temperatures from -80°F to 300°F. It is available in various packaging options: 10cc and 30cc syringes, ½ pints, pints, quarts, gallons, and 5-gallon containers.
Master Bond UV Curing Adhesive Systems
Master Bond’s UV curing product line features ultra-fast curing compounds ideal for diverse bonding, sealing, and coating applications within the optical, fibre optic, electronic, laser, and semiconductor industries. Certain UV grades meet NASA low outgassing or USP Class VI and ISO 10993-5 standards, and are used in the aerospace and medical industries, respectively.
Last November, Master Bond described its EP21LSCL-2Med, developed for medical device applications, as a two component non-cytotoxic epoxy for bonding, sealing, coating and potting.
While most, if not all, epoxies will yellow over time, especially upon exposure to heat and intense UV light, EP21LSCL-2Med is expected to resist yellowing to a greater extent than conventional systems. This feature makes it ideal for imaging applications or other medical devices where optical clarity is needed.
