Research Area

Primer & Chemical Surface Treatment

Debonding Process

In addition to the stable bonding of building components, the release of adhesive bondings without damaging the substrates is an important task in various market segments. Especially a defined separation of the elements is necessary if valuable or hard to get components are used for production or if there is a long value chain.

A non-destructive debonding enables the repair of defective building components before sale (rework) or in case of damage (un- or intentional – accident or vandalism) and so an economical production, optimal recycling and reusability of more expensive components. Debonding may also be necessary within the production chain, for example, if temporary bonding is required for positioning components for the assembly or processing of component elements (e.g. in the manufacture of optical products).

With our know-how, we test the reparability of your composites for you, find the suitable de bonding option for your substrate/adhesive combination and develop appropriate rework and repair processes.
Various approaches can be used, such as exposure to temperature and/or dissolving the adhesive, perhaps combined with mechanical techniques, which neither damage the components nor impair their functionality.

A process for gentle adhesive removal using chemical methods is an effective and cost-saving method, for example in order to correct faulty bondings or repair optical prisms.
A slight adhesive modification with special short-cut fibers allows an accelerated diffusion of the cleavage agents suitable for the adhesive system, especially in the case of thin glue joints that are difficult to access. This improved accessibility results in more rapid chemical depolymerization as well as swelling inside the joint, which in turn results in a much faster release of the adhesive, when the cleavage agents and adhesive composite have contact with each other.
The other bonding-related properties of the modified adhesives (with the exception of viscosity) are not significantly different from the basic system.

further Topics of Adhesive Technology

Dr. Joerg Leuthaeusser

Head of Department
Primer and Chemical Surface Treatment

Phone: +49 3641 2825 48