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60 Years of Service: PIOLOFORM® Binders for Printing Inks and Industrial Coatings

Published on 2004-10-14. Author : SpecialChem

Munich -- It has been 60 years since PIOLOFORM® polyvinyl butyrals began their rise at WACKER's home base of Burghausen. These vinyl acetate-derived polymers have a unique set of properties. They adhere to polymeric films and aluminum, they are flexible, odorless and tasteless, and have low solvent retention. As a result, they have a wide range of applications - from printing inks for the packaging industry to repair and anticorrosion coatings.

WACKER can look back over many years of experience. The main pioneering work dates from as early as 1924. That was when polyvinyl alcohol - the immediate precursor of polyvinyl butyrals - was discovered by scientists at the Consortium für elektrochemische Industrie GmbH, the central research facility of the WACKER Group. In the years following, acetals of polyvinyl alcohols were found to be invaluable coating raw materials, and in 1940 industrial-scale production of PIOLOFORM® began. Subsequently, the first PIOLOFORM® plant went into production at the Burghausen site in 1944.

Today, WACKER is a world market leader in polyvinyl butyral printing-ink binders. The wide range of properties exhibited by polyvinyl butyrals (PVB for short) are particularly useful in, for example, food packaging. Polymer composite films have been growing increasingly in this sector since the early 1990s - and the trend shows no sign of abating. PIOLOFORM® is particularly useful for applications where the packaging material and printing ink are required to exhibit high flexibility and mechanical resistance during processing. Typical examples are the laminates used in the packaging of, e.g., candy bars and snacks.

It is not only its excellent bonding strength that makes PIOLOFORM® ideal for inks used on food packaging.

IOLOFORM® is also odorless and tasteless, with very low solvent retention.

WACKER offers seven different standard grades to fulfill the varying requirements of the multitude of applications. It also produces special development products for other purposes. For example, WACKER's current research is aimed at selective modification of the molecular structure to confer new properties on the material, such as low viscosity. The advantage is that printing inks based on low-viscosity polyvinyl butyrals can incorporate greater amounts of pigments, and therefore have higher intensity.

Source: WACKER


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