SGR Paris

Conventionally, disassembly of multi-materials systems bonded together by adhesives or sealants is mainly based on tedious and time-consuming operations. Among them, current methods include thermal degradation, mechanical actions (e.g., cutting), use of solvents or combination of these methods. This often entails risk of substrate damage and health and environment issues. These facts highlight the need for easy, quick, and reliable techniques. One solution to that is to design adhesives that directly embeds debondable capacity on demand. Embedding of disassembly technologies directly in construction materials via proposing such reversible adhesives as vitrimers can be seen as an eco-design approach: ease of separation, sorting, and recycling of materials is intrinsically present as functionality of the product to recycle.

Besides, currently the market of sealants for construction is dominated by PU (70% of the market shares). Developing adhesives from scratch that allows new functionality such debonding on-demand and avoiding the use of toxic materials (isocyanates) on jobsites will be a real step toward the circularity field in construction based on holistic comprehension of the challenges spotted/highlighted by life cycle assessments approach.