VINNAPAS® EP 523
VINNAPAS® EP 523 is a plasticizer-free dispersion based on vinyl acetate and ethylen. It stands out due to its high cohesive force and great versatility and is recommended primarily for exterior applications.
- High cohesive force
- High solids content for formulation flexibility and supply-chain effciency
- Great versatility
VINNAPAS® EP 523 has been proved in a wide range of application fields. Versatility is a particular strength of this binder. VINNAPAS® EP 523 can be used as binder in a variety of paints and plasters – in either cases outdoor as well as indoor. Particularly in combination with external thermal insulation composite systems (ETICS), VINNAPAS® EP 523 has proved itself as an excellent binder for resin bound plasters. Due to its minimum film forming temperature of approx. +2°C VINNAPAS® EP 523 does not need any coalescing aids for filming. Thus it is a very suitable binder for indoor paints and plasters which complies with the criteria of tighter environmental-labels.
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Wacker Chemie AG
When the dispersion is stored in tanks, proper storage conditions must be maintained. The product has a shelf life of 6 months starting from the date of receipt if stored in the original, unopened containers at temperatures between 5 and 30 °C. Any longer periods for the maximum storage period that may be described in the Certificate of Analysis which accompanies each shipment of the product, take preference over this suggestion in which case the time period stated in the Certificate of Analysis shall be solely authoritative. Iron or galvanized iron containers and equipment are not recommended. Corrosion could result in discoloration of the dispersion or blends made from it in further processing. We therefore recommend the use of containers and equipment made of ceramic, rubberized or enameled materials, appropriately finished stainless steel, or plastic (rigid PVC, polyethylene or polyester resin). As polymer dispersions may tend to superficial film formation, skins or lumps may be formed during storage or transportation. A filtration process is thus recommended prior to utilization of the product.
Preservation for Transport, Storage and further Processing
The product is adequately preserved during transportation and storage if kept in the original, unopened containers. However, if it is transferred to storage tanks, the dispersion should be protected against microbial attack by adding a suitable preservative package.
Measures should also be taken to ensure cleanliness of the tanks and pipes. In unstirred tanks, a layer of preservative-containing water should be sprayed onto the surface of the dispersion to prevent the formation of unwanted skin and possible attack by microorganisms. The thickness of this water layer should be < 5 mm for low viscosity dispersions and up to 10–20 mm for high viscosity products. Proper procedures – periodic tank cleaning and sanitization – must be set up in order to prevent microbial attack. Contact your biocide representative/supplier for further plant hygiene recommendations. Measures should be taken to ensure that only clean air enters the tank when the dispersion is removed.
Finished products manufactured from polymer dispersions usually also require preservation. The type and scope of preservation will depend on the raw materials used and the anticipated sources of contamination. The compatibility with other components and the efficacy of the preservative should always be tested in the respective formulation. Preservative manufacturers will be able to advise you about the type and dosage of preservative required.