VINNAPAS® 400 H

VINNAPAS® 400 H is a poly(vinyl alcohol) stabilized vinyl acetate-ethylene copolymer dispersion with a glass transition temperature (Tg) of 0 °C. It was developed as a higher viscosity, high-performance dispersion offering a superior balance of adhesive/cohesive properties useful in achieving much higher formulation viscosities.



特性

VINNAPAS® 400 H is used as a base for adhesives and offers a superior balance of adhesive/ cohesive properties. Much higher formulation viscosities can be achieved due to the higher viscosity of the dispersion. This allows for more dilution water to be added to achieve the same end viscosity and thus reduce overall costs. This dispersion exhibits excellent setting speed, wet tack, and high thickening response. It has clean machining and is suitable for a variety of roll, extruder or spray applications because of its poly(vinyl alcohol) stabilization. The dry film is tack-free and heat-sealable. The backbone of the polymer gives the dried adhesive film both high tensile strength and flexibility that continue to be present even with fluctuations in temperature and humidity. Just like VINNAPAS® 400, this dispersion has excellent heat resistance which, at elevated temperatures, is much greater than that exhibited by other vinyl acetate-ethylene, vinyl acetate-maleate and vinyl acetate-acrylate copolymers with similar glass transition temperatures. The initial adhesive strength is excellent even after aging, and it exhibits excellent resistance to plasticizer migration.

VINNAPAS® 400 H的特殊性能

  • 生产过程中未使用APEO

免责声明

所提供之所有信息均基于我们当前所掌握的知识。尽管如此,我们不对其作任何担保、也不承担任何责任,并且保留在任何时候进行技术变更的权利。购买方应在预测试中对所提供之信息以及产品在既定应用中的适应性进行检查。任何时候都必须以合同条款与条件为准。此外,本免责申明还适用于与第三方权利有关之事宜,尤其是在德国境外。

Protect against frost.


VINNAPAS® 400 H is compatible with other poly(vinyl alcohol) and surfactant stabilized vinyl acetate-based dispersions and acrylic copolymers. It is also compatible with rubber lattices, water-based urethane dispersions, solvents, plasticizers and other modifiers. VINNAPAS® 400 H thickens rapidly to high viscosities with the addition of plasticizers and/ or solvents. The addition of plasticizers to VINNAPAS® 400 H will improve the specific adhesion, water resistance and setting speed. Additionally, the adhesive dispersion accepts moderate loadings of dry fillers. VINNAPAS® 400 H can be further crosslinked through the hydroxyl functionality of the poly(vinyl alcohol) with materials such as glyoxal, boric acid, and isocyanates.


VINNAPAS® 400 H is an excellent base for adhesive formulators and can be used in an extremely wide variety of applications. The ethylene in the polymer acts as an internal plasticizer which provides flexibility and reduces or eliminates the need for plasticizer in many applications. Because of its flexibility and excellent adhesion to so many substrates, VINNAPAS® 400 H is a versatile base in adhesives for application areas which include but are not limited to packaging (case and carton,) converting, bookbinding, textile bonding, vinyl and paper to wood laminating, automotive applications, and craft glues. It forms strong bonds between porous substrates and such films as poly(vinyl chloride) (PVC), poly(vinylidene chloride), cellulose acetate, cellophane and acrylic. VINNAPAS® 400 H adheres to widely diversified substrates such as paper, wood, cotton cloth, nylon cloth, glass and glass fibers, hardboard, urethane foam and clay coated paperboard.

储存

When the dispersion is stored in tanks, proper storage conditions must be maintained. If stored in the original, unopened containers at cool (below 30 °C), but frost-free temperatures the product has a shelf life of 9 months from the date of manufacture. 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. To maintain proper storage conditions appropriate measures should also be taken to ensure cleanliness of the tanks and pipes. In a storage tank in which the product is not stirred, it is advisable to contact your biocide representative/supplier. Proper procedures must be set up in order to prevent microbial attack between necessary periodic tank cleaning and sanitization. These procedures will vary, since loading and unloading practices in each storage situation will differ slightly. 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.

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000000 Changsha
中国大陆
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