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Bayer at ECS 2015: Unveiled Desmodur® eco N 7300, a Biobased Hardener for PU Coatings

Published on 2015-04-28. Author : SpecialChem

NUREMBERG -- Bayer MaterialScience has developed a bio-based hardener for polyurethane (PU) coatings and adhesives. The product, based on pentamethylene diisocyanate (PDI), achieves the high level of conventional, petrochemical-based isocyanates, and in some cases even surpasses it. It is the perfect complement to polyols made from renewable raw materials, which are already being used in polyurethane coatings and adhesives. These coatings can thus now be formulated entirely from bio-based components.

The company unveiled the new Desmodur® eco N 7300 hardener to specialists at the European Coatings Show 2015. A large proportion of the carbon content – 70 percent – is biomass-based. The starting product is a starch from forage corn, a feed and industrial crop that is not intended for human consumption and does not compete directly with food production.

Award-winning Development

At the International Conference on Bio-based Materials on April 13 in Cologne, Germany, Bayer MaterialScience was honored for this development with the “Bio-based Material of the Year 2015” innovation award. In the public vote, the product of the company excelled over innovations of other big players in the chemical industry. With 220 participants from over 20 countries, the conference is one of the largest of its kind in the world.

Increasing numbers of consumers are opting for sustainable products. They pay particular attention to the use of renewable materials and environmental labels. Environmental compatibility is becoming a market requirement, and large suppliers of brand products support this trend.

Improved Eco-credentials Along the Value Chain

“Coating and adhesive manufacturers and their customers can use the new hardener to improve their carbon credentials significantly,” says Dr. Berta Vega Sánchez, a marketing manager in the Coatings, Adhesives, Specialties Business Unit at Bayer MaterialScience. “Users and manufacturers of brand products in various industries can use the higher bio content to position themselves as pioneers for sustainable materials.” This innovation is an excellent example of customer-oriented developments, true to the slogan Bayer MaterialScience Coatings, Adhesives, Specialties Business Unit’s slogan “Inventing for you.”

As regards hardness, processing and resistance to weathering, scratching and chemicals, Desmodur® eco N 7300 is absolutely on a par with conventional, petrochemical-based hardeners. In terms of compatibility with coating and adhesive formulations, it even has advantages.

Wide Range of Applications

Bayer MaterialScience is currently developing a comprehensive technology platform to enable additional uses for PDI-based raw materials in coatings, adhesives and other applications. The company is inviting customers to join forces with it in a drive to understand the market needs of the various sectors even better.

Commercial production of Desmodur® eco N 7300 is due to begin following mandatory REACH registration. A total annual capacity of up to 20,000 metric tons is to be provided at existing plants for this purpose.

“The suppliers of our PDI precursor are already working on the next generation of biomass,” says Dr. Gesa Behnken, Global Head of New Technologies at Bayer MaterialScience. The starting material is no longer forage corn, but cellulose or biowaste, and the process is already being used to manufacture bioethanol. “Developments are likely to be so advanced in a few years’ time – and that also applies to our project – that sufficient quantities will be available for industrial production.”

About Bayer MaterialScience

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 2014 Bayer MaterialScience had 30 production sites and employed approximately 14,200 people around the globe. Bayer MaterialScience is a Bayer Group company.

Source: Bayer MaterialScience


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