VINNAPAS® CA 5317
VINNAPAS® CA 5317 is an aqueous polymer dispersion based on vinyl acetate and ethylene. It is particularly suited in back coatings of woven materials, needle felt floor coverings and tufted carpets. The dispersion combines high solids content with a moderate viscosity. VINNAPAS® CA 5317 is not produced with any added organic solvents or plasticizers.
- VINNAPAS® CA 5317 may be used in applications where filler loadings of calcium carbonate, aluminum trihydrate (ATH) or other fillers are required.
- The films are noted for their flexibility to below freezing point, aging resistance and light stability.
- The dispersion is compatible with acrylic dispersions and many styrene-butadiene latices.
VINNAPAS® CA 5317 can be used in the production of woven carpets, needle felt floor coverings and tufted carpets, where it delivers high dry adhesion strength and imparts soft to medium hand.
VINNAPAS® CA 5317 offers excellent adhesion to a variety of substrates together with high cohesion.
VINNAPAS® CA 5317 can be applied by a number of different application methods including foaming (direct coating), pan coating, saturation and spraying.
VINNAPAS® CA 5317 performs well on various fiber types including polypropylene, polyamide, cellulose, and polyester.
VINNAPAS® CA 5317 can take moderate filler loads with calcium carbonate or aluminium trihydrate (ATH) for compounding. Foaming additives and dispersing agents can be added to VINNAPAS® CA 5317 to improve foamability and filler acceptance. The compatibility and efficacy should be checked by conducting a storage stability test.
VINNAPAS® CA 5317 is miscible in all portions with most VINNAPAS® dispersions. Here too, the compatibility of the mixture should be tested by conducting a storage test.
We recommend alkali-swellable poly(acrylic acid) derivatives. Products with neutral pH, e.g., those based on cellulose derivatives, poly(vinyl alcohol) or polyurethane, can also be considered. Their compatibility and efficacy should be evaluated.
VINNAPAS® CA 5317 is compatible with many common mineral fillers (chalk, gypsum, dolomite, aluminum hydroxide). The latter product is especially suitable for the production of low smoke emission flame-proofing compounds used in textile floor coverings. The compatibility and stability should be checked by conducting a storage test.
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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.