Collaboration between Audi, BASF and Covestro

New clearcoat with biobased hardener for automotive manufacturing

New clearcoat with biobased hardener Covestro
Satisfied faces in Audi´s paint shop in Ingolstadt: Dr. Matthijs Groenewolt, head of clearcoat and topcoat development Europe at BASF, Dr. Markus Mechtel, head of marketing for automotive coatings at Covestro, and Thomas Heußer, head of materials and process engineering at Audi (from left to right), are pleased about the successful coating of Q2 test bodies under realistic production conditions.

In the automotive industry, manufacturers and suppliers are working constantly to reduce energy consumption and CO2 emissions in production. A project team consisting of employees of the car maker Audi, BASF´s Coatings division and materials company Covestro has now passed a new milestone: for the first time, a clearcoat containing a biobased hardener was applied to test bodies of the Audi Q2 under near-series conditions at the Audi plant in Ingolstadt, Germany.

BASF developed the clearcoat using the biobased hardener Desmodur® eco N 7300 from Covestro. A total of 70 percent of the hardener’s carbon content is sourced from renewable raw materials. This innovation reduces the consumption of fossil resources. The clearcoat forms the top layer of the coating system, lending it scratch resistance, a glossy appearance and protection against sunlight and other weather effects.