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Hybrid chemistry: Light fixation revolutionises 2C adhesives

Author : Karl Bitzer, Senior Product Manager

30 March 2020

Two-component (2C) epoxy resins are suitable for structural bonding and protective potting. For many industrial applications, the time-lapse before reaching initial strength has been deemed a major disadvantage – until now.

2C products can be dispensed precisely with the preeflow eco-DUO volumetric dispensing systems.

For the first time, there is a viable and instantaneous form of light fixation for 2C epoxy resins. This new technology offers a faster and simpler production process as well as less expensive logistics.

Over the last several years, dual-curing adhesives have greatly shortened the time of joining processes in high-volume industrial applications. Under high-intensity (UV) light, two components can be fixed together within seconds before they achieve full strength in a second process step. This reduces enormously the time leading to the further processing of an assembly. In addition, the precision of bonding rises with controlled curing or fixation on demand. This is required in response to the increasing level of miniaturisation in many sectors.

2C epoxy resins – known for good strength, marked media resistance, and reliable curing at room temperature – were unable to keep pace with this trend because they lacked a light fixation capability. However, now there is a dual-curing process suitable for two-component products used in industrial production environments. It combines the strengths of 2C products with the advantages of light fixation, equipping users with an entirely new option in the use of bonding technology in their production processes.

Read the full article in the April issue of DPA.


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