Essen, Germany. Evonik has developed a breakthrough "Debonding on Demand" concept to meet the growing requirements of today's manufacturing industry to increase circularity by improving the sustainability of adhesives. Developed in collaboration between Evonik's strategic innovation unit and business incubator, Creavis, and advanced polyurethane experts from the Comfort & Insulation business line, this innovative technology aims to address the pressing need for adhesives that can be easily removed for recycling and repair.

•    New debonding approach enhances material recyclability and repairability in modern manufacturing processes
•    Demonstrates significant cohesive strength loss after heat treatment in 1k and 2K-adhesive system applications
•    Designed to integrate with existing technologies, promoting operational flexibility

Adhesives are essential for modern manufacturing because they allow for efficient assembly, bonding of diverse materials, and lightweight construction. However, traditional adhesives can present challenges when it comes to the repair and recycling of bonded components. Evonik's innovative debonding on demand technology addresses these challenges by leveraging reversible or cleavable covalent bonds as the foundation of the chemical network, ensuring economic viability and operational efficiency. This new development is highly applicable and will complement existing thermal debonding technologies, such as stretch-and-detach or electric debonding, making it an attractive option for a wide range of industries. It has the potential to transform the circular economy by making the disassembly and recycling of products easier and more efficient.

“Despite the growing demand for debondable adhesives, to date, there have been limited effective solutions available in the market to make disassembling material parts easier, said Dr. Nicolai Kolb, Manager Business Development at Creavis. “Evonik is committed to leading the way in adhesive innovation, and our new approach is a positive step forward in developing more sustainable adhesive solutions that align with the principles of the circular economy.”

This innovative approach is compatible with existing adhesive technologies, including polyurethanes, enabling integration into existing manufacturing processes. The new debonding on demand concept from Evonik has low viscosity, enhancing ease of use in various applications. It offers a flexible range of debonding temperatures (80-150°C), compatible with both 1K and 2K adhesive systems, making it suitable for a wide range of applications.

“The development of this breakthrough technology is particularly timely, as regulatory pressures and sustainability concerns continue to shape the adhesive market,” said Dr. Christian Brandl, Technology Manager Advanced Polyurethanes, Comfort & Insulation business line. “We are excited by the potential of our new debonding on demand concept to meet these regulatory requirements by offering significant advantages in terms of material recovery, waste reduction, and product longevity.”

Evonik is currently collaborating with selected players in the adhesive market to prepare market demonstrators for this innovative technology. Initial proof of concept trials have shown promising results, indicating significant loss of cohesive strength after heat treatment, further validating the effectiveness of the debonding process.

Source: Evonik