| Product description: VINNAPAS® EF8001 is an aqueous vinyl acetate ethylene copolymer dispersion. It was developed as a higher performance replacement for vinyl acrylic copolymers with environmental advantages. Properties: As a broad application binder for architectural coatings, VINNAPAS® EF8001 provides a variety of benefits for the coatings formulator. VINNAPAS® EF8001 is designed to meet the following requirements for the coatings industry: - It does not use any surfactants or defoamers that contain alkylphenol ethoxylate (APEO).
- It is manufactured without the use of any formaldehyde donors.
- It enables the formulation of low volatile organic compounds (VOCs) coatings.
- It has a low glass transition temperature (Tg) and minimum film formation temperature (MFFT) which provide the polymer with a very low to no cosolvent demand for proper film formation.
VINNAPAS® EF8001 continues the standard for scrub resistance set by VAE copolymers as evidenced by evaluations of several different formulations that show it outperforming both conventional and low VOC latexes. This allows paint formulators to develop paints with extremely high levels of scrub resistance. A key requirement for contractor flat paints involves the property of touch-up, which is characterized as maintaining a visually uniform appearance of a film surface upon repainting after the initial coat of paint has been applied. While the choice of pigments used in the formulation can also have a significant effect on this property, the choice of polymer has a major impact on low temperature touch-up, particularly in lower VOC systems. VINNAPAS® EF8001 exhibits excellent ambient and low temperature touch-up properties in general, which is characteristic of many VAE polymers. VINNAPAS® EF8001 exhibits excellent thickener response with a number of different thickener types, including hydrophobically modified cellulosics (HMHEC), hydrophobic ethoxylated urethanes (HEUR), and hydrophobic alkali-swellable emulsions (HASE). With the ever-tightening restrictions on the permissible level of VOCs in coatings, it is becoming more important that the polymers used in formulations can be formulated at lower solvent levels without sacrificing performance. Many commercial binders used today, especially conventional vinyl acrylics, suffer significantly in performance when formulated at lower solvent levels. VINNAPAS® EF8001 requires little to no coalescing solvent, which allows formulators to develop high performance coatings even at low VOC paints. The reduction in solvent provided by formulating with VINNAPAS® EF8001 compared with conventional vinyl acrylics can deliver additional raw material cost savings.Application: VINNAPAS® EF8001 represents the next in a line of VAE copolymer dispersions that is positioned to broadly replace vinyl acrylics in the architectural coatings industry. It has application in contractor and Do-it-Yourself (DIY) products and is recommended for flat through mid-sheen finishes. With the environmentally friendly design of VINNAPAS® EF8001, it is compliant with any major “green” requirements foreseeable in the coatings industry. VINNAPAS® EF8001 is also very compatible with other latex dispersions and can be blended with other polymers such as high Tg pure acrylics to provide improved block resistance and wet adhesion, properties which are necessary in higher end and higher gloss/sheen coatings. VINNAPAS® EF8001 has been designed to replace vinyl acrylics in both interior and exterior formulations, either as a sole binder or in blends with other vehicles, such as acrylics. Exterior paints based on VINNAPAS® EF8001 have been exposed in multiple climates on a variety of substrates. Performance over dimensionally unstable wood substrates has shown comparable grain-cracking resistance to vinyl acrylics. In addition, over "hot masonry" substrates, VINNAPAS® EF8001 exhibits significantly better resistance to alkaline hydrolysis versus conventional vinyl acrylic polymers. Information provided by Wacker Chemie AG. |
