Master Bond Dual Curing Adhesive Enables Rapid Fixturing

Master Bond’s LED422DC90 is a one-component industrial adhesive. The dual-curing system has a "side-bonding" capability that allows for rapid polymerization up to 3-4 mm in depth by exposing the adhesive to 405 nm LED light from an angle. The cure is then completed by a secondary heat cure at 90-95°C for 30-45 minutes. This two-tiered curing process allows for the precise and rapid fixturing of heat-sensitive components.

LED422DC90 is a one-component, nanosilica-filled dual-curing system. Source: Master Bond

LED422DC90 offers dimensional stability and a relatively low coefficient of thermal expansion for a dual-cure LED product, at 30-40 x 10^-6 in./in./°C. It is an optically clear material with a refractive index of 1.49, a Shore D hardness of 85-90 and an elongation of 1-3%. The system offers a good strength profile, featuring a tensile strength of 6,000-7,000 psi, a tensile modulus of 475,000-575,000 psi, and a tensile lap shear strength for aluminum to aluminum of 800-900 psi.

The system is an electrical insulator with a volume resistivity greater than 10¹⁴ ohm-cm. It also passes NASA low outgassing certifications and is designed for use in the electronics, optics and aerospace industries.

According to Master Bond, LED422DC90 bonds well to a variety of substrates, including plastics, glass and metals, and is serviceable from -80°F to +350°F. This adhesive is available in syringes, half pint, pint and quart containers.