Industry News

Researchers Use Lignin to Create Eco-friendly Primers

Published on 2018-02-05. Author : SpecialChem

TAGS:  Environmentally Friendly Coatings    

Fraunhofer scientists have created an alternative to petrochemical by processing lignin, which is renewable, environmentally friendly and available almost without any limit.

Bio-binder for Primer Formulation

ligninbased Primer
Lignin is a real alternative to fossil resources in the
manufacture of primers and adhesives.
In the development of alternatives to petrochemical substances, lignin has often attracted the attention of scientists. Due to its challenging properties, though, such efforts with the mechanical wood pulp have so far not prevailed. For example, the exact chemical composition of the lignin mass depends on whether it comes from paper production and is mixed with other substances or whether it is a by-product of biofuel.

Accordingly, the production of a substance that always has a similar reaction is highly complex. "Most previous approaches were based on producing lignin monomeric starting materials, which always have the same properties. Due to the different composition of the starting material, this is quite complex," explains Yvonne Wilke from the Fraunhofer IFAM.

"We took a different approach by standardizing and modifying the whole substance. This gives us a raw material that we can say is always the same within certain limits."

The experts from the Fraunhofer IFAM transformed the standardized mixture further and used it as raw material for binders for primer formulations. The result is a primer that has key properties such as corrosion protection, adhesion or applicability comparable to primers based on petrochemicals.

Primers Made of Plant Residues

  • In times when the call of both manufacturers and end customers for sustainable products is becoming louder, bio-based solutions are particularly becoming interesting
  • In the automotive industry, for example, the carbon footprint is an important selling point 
  • Through the use of bio-based primers and paints, this can be significantly improved
  • The lignin-based primer of the Fraunhofer IFAM has comparable properties to those of conventional primers, no compromise would have to be made in terms of quality

"Independence from fossil fuels is a tremendous goal. Especially considering the amount of products that are still based on fossil fuels," says Wilke.

"With our project, we've been able to take a few steps in the right direction and to show that lignin is a real alternative in the manufacture of primers and adhesives, as well as that it brings us closer to independence from petrochemicals."

Source: Fraunhofer
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