VINNOL® CE 35
VINNOL® CE 35 is an aqueous dispersion of a terpolymer of vinyl chloride, vinyl acetate and ethylene.
- VINNOL® CE 35 is a stiff film-former and imparts excellent heat-sealability and high frequency (HF)-weldability to nonwovens & textiles substrates.
- Because of its high chlorine content, VINNOL® CE 35 can be used in conjunction with antimony oxide, phosphorous-nitrogen compounds or other flame-retardant additives to produce flame retardant coatings.
- It also especially suitable for making plasticizer-free heat sealable and high frequency weldable coatings on paper and cardboard.
VINNOL® CE 35 is especially suitable as binder for heats-sealable/ HF-weldable waddings. It sprays well and does not generate unpleasant odors during processing.
VINNOL® CE 35 is miscible with most anionic and/ or nonionic polymer dispersions especially with VINNOL® CEN 2752. The latter will soften handfeel.
Solvents and Plasticizers
The flame-retardant effect of VINNOL® CE 35 can be increased by adding, for example phosphorous-nitrogen compound, which also softens the polymer film and lowers the glass transition and minimum film forming temperatures.
The addition should be made at room temperature, but the mixture should then be heated at about 50 °C for 1 hour to ensure that the plasticizer diffuses completely into the resin particles.
If necessary, VINNOL® CE 35 dispersion can be defoamed with 1) SILFOAM® SE1662, for example. The efficacy and compatibility of the formulation chosen should always be checked.
Polyurethane thickeners such as 2)ROHAGIT® SD15, 3)ACRYSOL TM RM8, 4)Rheovis® AS 1125 are recommended to use with VINNOL® CE 35. The efficacy and compatibility of the formulation chosen should always be checked.
1) SILFOAM® is a trademark of Wacker Chemie AG
2) ROHAGIT® is a trademark of Synthomer PLC
3) ACRYSOLTM is a trademark of Dow Chemical Company
4) RHEOVIS® is a trademark of BASF SE
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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.