LED415DC90 adhesives for aerospace and defense

March 15, 2023
One component, flexibilized LED curable system

Key Features

  • Cures rapidly with LED light
  • Secondary heat cure at 90-95°C
  • Can cure up to 6 mm deep or in cross section
  • Formulated for “side bonding” applications

Master Bond LED415DC90 is a one part system that cures rapidly upon exposure to LED light at 405 nm followed by heat curing at 90-95°C for 30-45 minutes. This fast curing system is not oxygen inhibited and can cure up to 6 mm deep or in cross section. This unusual curing profile allows this LED to be used for side bonding. Side bonding refers to a situation where the LED is applied between two opaque substrates and the light is exposed to the adhesive from a side angle and not through the substrate, which is more the norm. The unusually deep penetration in cross section offered by LED415DC90 allows it to partially cure enough to fixture the two substrates. The cure is then completed by adding 90-95°C heat for 30-45 minutes.

There are some variables to consider with speed of the LED curing process. These include the intensity of the light source, the thickness of the layer, and the width of the cross section that is being cured. The recommended intensity of the light source should be 2-4 watts/cm2.

LED415DC90 bonds well to a wide variety of substrates including plastics, glass and metals. The system has good chemical resistance to oil, water, fuels, and mild acids and bases. It is a reliable electrical insulator with a service temperature range of -80°F to 350°F. Additionally, it can withstand rigorous thermal cycling, mechanical shock and vibration. The special feature of LED415DC90 curing well cross sectionally combined with its secondary heat cure allows it to be used as a high strength adhesive. Utilizing LED light for fixturing followed by relatively fast heat curing is an interesting and unique way of attaching substrates together.

Product Advantages

  • One component system
  • Cures by LED light, UV light not required
  • Uncured material readily polymerizes with heat
  • Can cure in cross section 4-6 mm
  • Excellent strength properties, especially lap shear

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