VINNAPAS® EN 1020
VINNAPAS® EN 1020 is a self-crosslinking, aqueous polymer dispersion based on the monomers vinyl acetate and ethylene. VINNAPAS® EN 1020 is produced without the use of plasticizer.
- VINNAPAS® EN 1020 is particularly suitable as binder for soft hydrophilic nonwovens. The binder can be applied by spray, impregnation or foam
- VINNAPAS® EN 1020 provides good wet strength while the free formaldehyde content on the nonwoven remains low.
VINNAPAS® EN 1020 can be mixed with most of the VINNAPAS® dispersions and with many other aqueous polymer dispersions. However, the compatibility of the mixture should be tested by undertaking a storage test. Temperatures above 150 °C are necessary to achieve proper crosslinking.
Suitable defoaming agents include 1)SILFOAM® SE1662, 2) FOAMASTER® WO 2310, 3)Agitan® 352 and 4)SURFYNOL® DF58. Their compatibility and efficiency in the formulation chosen should always be tested. Thickening Agents We recommend, in particular, products with a neutral pH, e.g. those based on cellulose derivatives, polyvinyl alcohol or polyurethane, like e.g. 5)ACRYSOLTM RM8-W. Should alcali-swellable polyacrylic acid derivatives be used those need to be chosen that are effective with ammonia, in order not to interfere with the acid catalyzed cross-linking of VINNAPAS® EN 1020. Typical alkali-swellable thickening agents are, for example, 6)ROHAGIT® SD15, 5)ACRYSOLTM ASE60, 7) RHEOLATE® 420 or 425 8)RHEOVIS® AS1130. The efficacy and compatibility of the formulation chosen should always be checked.
1) SILFOAM® is a trademark of Wacker Chemie AG
2) FOAMASTER® is a trademark of BASF SE
3) AGITAN® is a trademark of MÜNZING Chemie GmbH
4) SURFNOL® is a trademark of Evonik Resource Efficiency GmbH
5) ACRYSOLTM is a trademark of Dow Chemical Company
6) ROHAGIT® is a trademark of Synthomer PLC
7) RHEOLATE® is a trademark of Elementis Specialties, Inc
8) RHEOVIS® is a trademark of BASF SE
If the product is used in applications other than those mentioned, the choice, processing and use of the product is the sole responsibility of the purchaser. All legal and other regulations must be complied with.
For questions concerning food contact status according the chapter 21 CFR (US FDA) and German BfR, please feel free to contact us.Wacker Chemie AG Hanns-Seidel-Platz 4 D-81737 München Germany
When the dispersion is stored in tanks, proper storage conditions must be maintained. VINNAPAS® EN 1020 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. 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
VINNAPAS® EN 1020 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.