Environmental friendliness and sustainability are important keywords in the coating industry. However, 100 % bio-based coatings represent just 1-3 % [1] of the total market volume and coatings with a high bio-based content account for about 10 % [2]. Reasons for this include an assumption that bio-based coatings are more expensive, less efficient and have lower availability compared with commercial synthetic polymer coatings, which is why there is a high demand for new developments in this area. Native starch with its global availability and low raw material price fulfils two criteria. At the same time, starch has inherent ...