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Sunday, 15 September 2019
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Raw materials & technologies, Applications, Automotive coatings

Coating hardener from biomass improves carbon credentials

Thursday, 30 April 2015

Automotive coatings are one of the application areas for a new, bio-based hardener for polyurethane coatings and adhesives.

Dr. Gesa Behnken (left), global head of New Technologies, and Dr. Berta Vega Sánchez, marketing manager in the Coatings, Adhesives, Specialties Business Unit of Bayer MaterialScience, present a coated car body part. Source: Bayer MaterialScience
Dr. Gesa Behnken (left), global head of New Technologies, and Dr. Berta Vega Sánchez, marketing manager in the Coatings, Adhesives, Specialties Bus...

"Desmodur eco N 7300” achieves the high level of conventional, petrochemical-based isocyanates, and in some cases even surpasses it. The product, based on pentamethylene diisocyanate (PDI), 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. 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.

Furthermore Dr. Berta Vega Sanchez won the Innovation Slam Boxing Belt at the European Coatings SHOW 2015 this year with the presentation of this product against four other innovative developments.

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, the hardener 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 the hardener 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.

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