| abstract |
An aqueous coating composition, which when in the form of a film exhibits an MVTR of ≤ 500g/m2/24h comprising 20 to 80 wt% of a polyurethane A with an acid value of 8 to 40mg KOH/g and a hard segment content ≥ 40wt%, a ring structure content ≥ 48 wt% and 80 to 20 wt% of a vinyl polymer B with a Tg ≥ 20°C. |