At the ECS 2015, WACKER is premiering a silicone resin emulsion for wood protection coatings. The emulsion possesses hydrophobic properties that reliably protect wood outdoors against wet and damp and the damage that these cause. SILRES® WH, as the product is called, is flexible enough to adhere strongly to wood surfaces, and imbues them with the water-repellent properties that are typical of silicones for many years. Weathering tests show that the product still protects impregnated wood against moisture and damp after 15 years. This means that silicone resins, which have proved successful at protecting mineral substrates over the decades, can now provide wood with lasting outdoor protection, too.
The 50-percent emulsion is based on a functional silicone resin and can serve as a water-repellent impregnating agent or as an additive for formulating film-forming wood stains. Due to its hydrophobic properties, SILRES® WH reduces the water uptake of wood and so keeps its water content low. Weathering tests have shown that the silicone resin’s impregnating effect lasts for many years. Consequently, the wood is better protected against typical damage, such as fungus, mildew and insect attack, as well as cracks caused by swelling and shrinking. The use of biocides can be slashed as a result. SILRES® WH added to paints and wood stains confers lasting water repellency, even in low concentrations.
The water repellency is clearly revealed by the beading effect which SILRES® WH produces on wood surfaces. By providing wood with long-term protection, SILRES® WH greatly reduces the frequency of renovation and repainting compared with conventional wood preservatives. Best results are obtained by diluting it 1:4 to 1:9 with water. In waterborne stains, SILRES® WH is admixed in amounts of up to three percent.
To watch a video clip about SILRES® WH, go to 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, simple processing and even distribution. Additionally, the dispersion is characterized by excellent film formation, even at low outdoor temperatures, and by its elasticity while the polymer surface exhibits maximum blocking resistance. What is more, it has low flammability due to its mineral content. 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.
To watch a video clip about PRIMIS® AF, go to http:// www.wacker.com/ecs-clips
VINNAPAS® LL 3031: For High-Quality Interior and Exterior Paints and Facade Systems
Also new at the ECS 2015 is VINNAPAS® LL 3031, a waterborne polymer dispersion that is based on vinyl acetate, ethylene and vinyl chloride and has a very low environmental impact. The dispersion is produced without the use of alkylphenol ethoxylates (APEOs), plasticizers, film-forming agents or solvents, is low-odor and boasts an extremely low formaldehyde content (< 20 ppm). It also lends itself to paint formulations that have a low volatile-organic-compound content (VOC < 1 g/l).
VINNAPAS® LL 3031 is a general-purpose binder for paints and plasters used both indoors and outdoors. It provides high color consistency, good pigment compatibility, high saponification resistance and compatibility with silicates. It is very easy to process and offers enhanced rheology. VINNAPAS® LL 3031 dries quickly, but still possesses high binding power and abrasion resistance. As the dispersion yields flame-retardant polymer films, it is ideal for plasters and embedding coats for external thermal insulation composite systems (ETICS). Moreover, VINNAPAS® LL 3031 combines perfectly with silicone resin products from the SILRES® BS range to yield water-repellent facade systems.