Exterior wall-coatings deteriorate with time, and there can be various reasons for this.
Adding dirt resistance to paint
At the core of any water-based paint is the polymer dispersion which imparts most of its functional properties. Weather conditions have a huge impact on the durability of the exterior coating, affecting its qualities such as
It then becomes a challenge for paint manufacturers to formulate a dirt pick-up-resistant (DPUR) paint that is elastic enough to bridge surface cracks. It should also form a barrier with low water uptake (i.e. high water resistance) and high water-vapor permeability. As a result, liquid water cannot permeate through the surface, but water vapor can be harmlessly passed through the coating to prevent water build up and potential adhesion-loss problems.
Advances in polymer chemistry provide the answers to this puzzle. It helps paint manufacturers formulate a paint that shows all of these properties:
This way, the durability of the paint coating is enhanced, while also retaining its fresh appearance for long.
Clean, fresh walls: The BASF solution
BASF offers an excellent remedy to the age-old problem of dusty, grubby walls with its Acronal® 7079 polymer dispersion product that acts as a binder in the paint, allowing the coating (or paint) to resist dirt, dust, peeling, cracking, chalking and efflorescence build-up over time.
Owing to its unique cross-linking structure, this innovative product from BASF helps prevent formation of surface cracks and creates a good water-barrier and water-vapor permeability. Acronal® 7079 can be included in the paint to provide dust resistance and crack bridging.
So the next time you despair over the state of your walls, simply ask your paints supplier for paint that has the best dirt-resistance and water-proofing properties. This will not only help enhance exterior aesthetics but also overcome the impact of hairline cracks.