VINNAPAS® CA 5320
VINNAPAS® CA 5320 is a versatile polymer dispersion based on vinyl acetate and ethylene. It has excellent compatibility with pigments and fillers and delivers strong binding strength, soft hand, and excellent processability.
- VINNAPAS® CA 5320 does not contain APEO surfactants and is produced without using formaldehyde donors and without added plasticizers or organic solvents.
VINNAPAS® CA 5320 is suitable for use in a broad range of carpet backing applications such as carpet tiles, tufted broadloom, woven carpet and needle felts.
The dispersion is characterized by high bonding strength combined with increased flexural strength and good compatibility with inorganic fillers like calcium carbonate and alumina trihydrate (ATH).
VINNAPAS® CA 5320 is compatible with other dispersions such as styrene-butadiene, styrene-acrylic and pure acrylics.
VINNAPAS® CA 5320 can be applied by a number of different application methods including foaming (direct coating), pan coating, saturation and spraying.
VINNAPAS® CA 5320 performs well on various fiber types including polypropylene, polyamide, cellulose, and polyester.
VINNAPAS® CA 5320 can be blended with most anionic and/or nonionic aqueous polymer dispersions. However, the compatibility of the mixture should be tested by means of storage tests.
VINNAPAS® CA 5320 has a minimum film forming temperature of 0°C. Therefore, there is no need to add any film-forming or coalescing agents to the formulation.
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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 9 months starting from the date of manufacture if stored in the original, unopened containers at temperatures between 5 and 30°C. Please refer to "Best use before date" on the packaging label. Storage beyond the date specified does not mean that the product can´t be used anymore, but the user should perform a quality check on the properties necessary for the intended application. 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 equipment and containers are not recommended because the dispersion is slightly acidic. Corrosion may result in discoloration of the dispersion or its blends when further processed. Therefore, the use of containers and equipment made of ceramics, rubberized or enameled materials, appropriately finished stainless steel, or plastic (e.g. rigid PVC, polyethylene or polyester resin) is recommended. As polymer dispersions may tend to superficial film formation, skins or lumps may form during storage or transportation. Filtration is therefore 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.