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Bayer at ETCC: to Present Sustainable PU Coatings with Bio-based Raw Materials & more

Published on 2014-06-27. Author : SpecialChem

Leverkusen -- New functions and enhanced sustainability will have a key impact on the future development of paints and coatings. The European Technical Coatings Congress (ETCC), which is taking place from September 3 – 5, 2014 at the Gürzenich in Cologne, will be devoted to this topic. As one of the leading suppliers of raw materials for high-performance polyurethane coatings and adhesives, Bayer MaterialScience will be giving three presentations at this event. The focus will be on the latest sustainable developments involving the formulation and application of coatings.

Polyurethane coatings are very durable, which ensures long-lasting protection for valuable items in everyday use. They also help conserve resources that are needed to manufacture the steady flow of new products. Significantly reducing the content of volatile organic compounds (VOCs) enables a high level of occupational safety to be achieved and also benefits the environment. This satisfies key requirements relating to the performance and environmental compatibility of coatings.

More Sustainable Coatings with Bio-Based Raw Materials

Analyzing technical solutions throughout the value-added chain can further optimize sustainability and social acceptance. Using renewable raw materials is one possible way of further reducing carbon footprints. "In addition to this property, renewable raw materials are part of the trend toward more sustainable products," explains Dr. Gesa Behnken, who represents a ten-strong research team at Bayer MaterialScience. "Progress in the field of biotechnology offers additional possibilities for their increased use. What’s more, many of the substances that have become accessible as a result of this progress have not been available through petrochemical sources in the past. Bio-based substances thus open up completely new opportunities for product formulations," she continues.

The Bayer experts are therefore confident that these raw materials will enjoy stronger growth in the future, not least as a result of additional capacities being created.

High Productivity with Polyaspartic Floor Coatings

Binding agents made from polyaspartic raw materials and isocyanates have already delivered impressive results in corrosion protection and floor coatings. The main reasons for this are their high reactivity and their ability to form thick and durable layers in a short space of time, even at relatively low temperatures. It is therefore possible to dispense with one of the three coating layers used to date to achieve a similar protective effect to conventional coatings, which significantly boosts productivity during application.

Bayer specialists in Dr. Matthias Wintermantel’s team are currently working on further improving polyaspartics for floor coatings. One challenge that still remains is the formulation of systems for manual application. "Coatings are normally diluted with solvents to reduce their viscosity and make them easier to apply," explains Wintermantel. "The current VOC guidelines rule this out, and it wouldn’t be good for the environment either," he adds.

At the ETCC congress, the Bayer experts will be presenting a new low-viscosity polyaspartic ester that cures quickly at room temperature and can be used in combination with established products such as Desmophen® NH 1420. They have also significantly improved the balance between the hardness and flexibility of floor coatings.

Improved Application with Catalysts

Aliphatic hardeners based on hexamethylene diisocyanate (HDI) are ideal for numerous coating applications. Sometimes, however, they do not meet all the user’s needs, for example if their viscosity is too high or their reactivity is too low at a specific temperature. In such cases, targeted and controlled catalysis can produce the desired result.

For this purpose, Michael Grahl and a research team at Bayer MaterialScience have investigated thermolatent catalysts. They came to the conclusion that key parameters such as processing time and activation temperature can be set precisely by selecting appropriate catalysts. "This means we can give users valuable tips on efficiently achieving good curing without restricting the pot life too much," says Grahl. The results also have implications for processing casting elastomers, adhesives and sealants.

About Bayer MaterialScience

With 2013 sales of EUR 11.2 billion, Bayer MaterialScience is one of the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. At the end of 2013, Bayer MaterialScience had 30 production sites and employed approximately 14,300 people around the globe. Bayer MaterialScience is a Bayer Group company.

Source: Bayer MaterialScience

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