At ECS 2015, WACKER will be premiering a silicone resin emulsion for wood protection coatings. Its superior impregnating effect enables long-term protection against damp, moisture and damage from moisture exposure. Marketed as SILRES® WH, the product is so flexible that it even bonds to wood surfaces and thus retains the hydrophobic, i.e. water-repellent properties typical for silicones for many years. Long-term tests with impregnated wood show that the moisture and damp resistant properties of SILRES® WH are fully intact after 15 years. Silicone resin additives which have been successfully used on mineral substrates for decades can now provide wood with lasting outdoor protection.
The 50 percent emulsion is based on a functional silicone resin and is suitable as a wood impregnant or as an additive for formulating film-forming, pigmented wood stains. Due to its hydrophobic properties, SILRES® WH significantly reduces the water uptake of wood and, as a result, its moisture content. Weathering tests have shown that the silicone resin’s impregnating effect lasts for many years. Thus, wood is better protected against typical damage caused, for example, by fungi, mold and insects or by cracks due to shrinkage and swelling. It is possible to reduce the use of biocides in formulations significantly. In wood stains and coatings, even low amounts of SILRES® WH provide a long-lasting hydrophobic effect.
SILRES® WH produces a visible beading effect on wood surfaces. By providing wood with long-term protection, the product greatly reduces the frequency of renovation and recoating compared with conventional wood preservatives. Best results are achieved when mixing the additive with water in a 1:4 to 1:9 ratio. In water-based stains, a concentration of up to three percent SILRES® WH is sufficient.
Watch our video clip on SILRES® WH at: http:// www.wacker.com/ecs-clips
Less Dirt and More Color: PRIMIS® AF 1000
A further ECS 2015 highlight is the new PRIMIS® line, comprising binders and additives for advanced, high-value paints and architectural coatings. The new line combines organic and mineral components to deliver a binder with a completely novel property profile. The elastic, acrylic ester-based, organic component performs a binder’s traditional role, offering strong adhesion and cohesion, good mechanical properties and enhanced processability. The solid mineral components, on the other hand, have outstanding protective properties and ensure long-lasting, bright colors and reduced dirt pick-up.
PRIMIS® AF 1000 offers improved scratch and abrasion resistance, optimized thermal conductivity and water-vapor permeability, and simpler and more even processing. Additionally, the dispersion is characterized by excellent film formation, even at low outdoor temperatures, and by its elasticity while its surface exhibits maximum blocking resistance. The mineral components also improve fire performance. The dispersion’s good pigment compatibility and color consistency keep exterior paints bright for longer – extending renovation cycles and, in turn, positively impacting overall costs.
The new PRIMIS® AF 1000 dispersion is ideal for challenging exterior applications and expands WACKER’s extensive portfolio designed for plasters and exterior coatings.