Wacker Chemie AG Hanns-Seidel-Platz 4 81737 München, Germany www.wacker.com PRESS RELEASE Number 50 ABRAFATI 2015: WACKER Presents Novel Polymer Binders and Silicones for Water-Repellent Wood Coatings, Waterproofing Systems, Skim Coats and Fire Protection Coatings Munich / São Paulo, October 13, 2015 At ABRAFATI 2015, the WACKER Group is presenting a range of innovations for challenging coatings and sealants: Wood impregnated with the new silicone resin emulsion SILRES WH is protected against damp, moisture and damage caused by fungi and insects for an exceedingly long time. Another local premiere is the new silane-terminated polymer binder GENIOSIL XT for industrial adhesives and liquid waterproofing systems. Additional highlights are the dispersible powder VINNAPAS 5518 H for hydrophobic skim coats and the dispersions VINNAPAS EZ 3112 and VINNAPAS EZ 3066 for intumescent coatings. ABRAFATI is being held from October 13 to 15 in São Paulo, Brazil. At ABRAFATI 2015, WACKER is showcasing a range of polymer- and silicone-based products for the first time on the American market. SILRES WH, a novel silicone resin emulsion for wood protection coatings, possesses hydrophobic properties that reliably protect wood outdoors against wet and damp and the damage that these cause. The product is flexible enough to adhere strongly to wood surfaces, and imbues them with the water-repellent properties typical of silicones. Weathering tests show that the product still protects impregnated wood against moisture and damp after 17 years. This means that silicone res-
Oct. 13, 2015 Press Release No. 50 Page 2 of 8 ins, 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. 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 the emulsion produces on wood surfaces after weathering. The new product 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. Extremely tear-resistant and highly elastic: GENIOSIL XT Another highlight is the GENIOSIL XT line: the new products are based on silane-modified polyether with a high density of crosslinkable silyl groups and represent the first technically equivalent alternative to conventional polyurethane-based systems. By virtue of their properties, the new polymers are ideal for applications that repeatedly subject them to dynamic forces up to now, applications of this kind were essentially the domain of isocyanate-curing polymer systems. GENIOSIL XT s low viscosity makes it easy to process at low temperatures. The binders can be formulated with and without plasticiz-
Oct. 13, 2015 Press Release No. 50 Page 3 of 8 ers or fillers, and blends can be produced in any color. The compounds can be formulated for adhesion to many conventional substrates, such as metals, glass, cement, glazed tiles, wood, polycarbonate, and polymethyl methacrylate. Priming is unnecessary. As the polymers are also miscible with all other GENIOSIL silaneterminated polyethers, compounders can vary the properties over a wide range of formulations. Typical end products are industrial adhesives, liquid waterproofing systems, and coatings. GENIOSIL XT 50, for example, is an alpha-silane-terminated polymer and lends itself to the production of tin-free adhesives and crackbridging liquid waterproofing systems. These can possess tensile strengths of up to 9 N/mm 2 and tear strengths of up to 50 N/mm (measured in accordance with ASTM D 624 B-91). What is more, GENIOSIL XT 50 can be formulated without fillers to make transparent, tin-free end products that have good mechanical properties. Hydrophobic and flexible: VINNAPAS 5518 H for Skim Coats Skim coats are cementitious products applied with a low thickness of 1-2 mm to walls to reduce undulations and to create an ultra-smooth finish before a paint coat is applied on the top for protection and esthetic appeal. Modern skim coats are increasingly modified with polymer binders to enhance the workability and elasticity this is essential in new buildings, where some movement is still to be expected. VINNAPAS 5518 H is a dispersible polymer powder that exhibits great workability, good adhesion to all substrates, greater flexibility and flexural strength. Furthermore, it shows optimized cleaning properties and is thus much easier to wipe after film formation. Due to its strong hydrophobicity, skim coats modified with VINNAPAS 5518 H
Oct. 13, 2015 Press Release No. 50 Page 4 of 8 prevent moisture and dirt particles from penetrating the surface of the facades which results in an improved weather resistance, and therefore durability of buildings. This makes it particularly suitable for challenging outdoor applications such as skim coats. VINNAPAS Dispersions for Intumescent Coatings Intumescent coatings are special fire protection coatings which encase steel girders and swell (intumesce) in the event of a fire, thus delaying the melting or warping of the building s supporting structure. The coating is usually applied one to four millimeter thick and, when subject to heat, foams to tens to hundreds of times its original thickness. Because of the extremely low thermal conductivity of the foam layer, the temperature in the interior of the coating increases only slowly, so that the steel girders are protected against the heat of the fire for a defined time, and thus retain their strength for longer. The polymer dispersions VINNAPAS EZ 3112 and VINNAPAS EZ 3066 show particularly pronounced foaming and expansion, and longterm foam stability. At the same time, the adhesion and strength of the intumescent coatings are improved, so that the protective layer firmly adheres to the substrate and forms a heat barrier for a limited time. Without the binders, the foam layer would be too brittle and inadequately adhere to the steel substrate. Both binders are waterbased and free of organic solvents or additives, such as plasticizers. VINNAPAS EZ 3112 further offers the additional advantage of high hydrophobicity and a very good shelf life even under challenging storage conditions. Depending on the formulation, both dispersions allow for highly fire-resistant coatings with fire resistance class F120 (heat protection for up to 120 minutes).
Oct. 13, 2015 Press Release No. 50 Page 5 of 8 SILRES BS 168 Improves the Wet Abrasion Resistance of Interior Paints WACKER has also developed an interior paint additive for ph adjustment with zero odor and zero VOC properties (volatile organic compounds). Thanks to its high alkalinity (ph value: 13), SILRES BS 168 is highly efficient, combining lower dosages, high ph stability, and paint storage properties. It can also be pre-diluted in water (dilution rate: up to 1:3) for better dosage control. SILRES BS 168 itself does not contain volatile organic compounds and therefore doesn t affect the paint s VOC content. The product also interacts with the fillers and the resin in a coating formulation, positively increasing scrub resistance properties of the dried film. Visit WACKER at Abrafati 2015 at booth 3/D/4. Learn more about WACKER s innovative technologies and visit our lectures at the Abrafati Coatings Congress 2015: October 13, 2:30 p.m.: Silicone-based ph-adjuster: High efficiency, zero-odor and zero-voc October 15, 1:00 p.m.: Vinyl acetate-ethylene (VAE) dispersions provide high performance versatile binders for a variety of coatings applications
Oct. 13, 2015 Press Release No. 50 Page 6 of 8 New silicone resin emulsion SILRES WH provides wood with long-lasting protection against moisture and damp, as evidenced by the beading effect on impregnated wood (right). In contrast, the untreated wood (left) soaks up wet immediately. By providing long-term protection, SILRES WH greatly reduces the frequency of renovating and recoating exterior woodwork (photo: Wacker Chemie AG). A transparent liquid waterproofing system based on the new silaneterminated polymer GENIOSIL XT 50 available from WACKER can protect tiles against moisture and frost damage. Such polymers are both highly elastic, yet extremely tear resistant. They also display very good crackbridging properties (photo: Wacker Chemie AG).
Oct. 13, 2015 Press Release No. 50 Page 7 of 8 Modern buildings often feature steel skeletons but when the temperature reaches 500 C, steel frames soften rapidly. To prevent them from buckling within minutes during a fire (left), they are provided with special fire protection coatings, allowing them to resist a fire for much longer (right). The polymer binders VINNAPAS EZ 3112 and VINNAPAS EZ 3066 ensure significant foam development in these coatings, coupled with improved adhesion and strength (graphics: Wacker Chemie AG). Skim coats modified with hydrophobic polymer powders such as VINNAPAS 5518 H offer an improved weather resistance, and therefore durability of buildings (photo: Wacker Chemie AG).
Oct. 13, 2015 Press Release No. 50 Page 8 of 8 Note: These photos are available for download at: http://www.wacker.com/pressreleases For further information, please contact: Wacker Chemie AG Media Relations & Information Nadine Baumgartl Tel. +49 89 6279-1604 nadine.baumgartl@wacker.com www.wacker.com follow us on: The company in brief: WACKER is a globally active chemical company with some 16,700 employees and annual sales of around 4.83 billion (2014). WACKER has a global network of 25 production sites, 21 technical competence centers and 48 sales offices. WACKER SILICONES Silicone fluids, emulsions, rubber and resins; silanes; pyrogenic silicas; thermoplastic silicone elastomers WACKER POLYMERS Polyvinyl acetates and vinyl acetate copolymers in the form of dispersible polymer powders, dispersions, solid resins and solutions used as binders for construction chemicals, paints and coatings, adhesives, plasters, textiles and nonwovens, as well as for polymeric materials based on renewable resources WACKER BIOSOLUTIONS Biotech products such as cyclodextrins, cysteine and biologics, as well as fine chemicals and PVAc solid resins WACKER POLYSILICON Polysilicon for the semiconductor and photovoltaic industries Siltronic Hyperpure silicon wafers and monocrystals for semiconductor components