SHANGHAI - Covestro will use this week's All China Leather Exhibition (ACLE) to launch a series of breakthroughs in its Insqin waterborne polyurethane (PU) technology and Impranil polyurethane dispersion products. Insqin uses waterborne polyurethane technology instead of potentially polluting solvents and is part of Covestro's drive to replace PU-based textile coatings and artificial leather with a more sustainable option.