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Friday, 20 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

C26 monomers from mother nature form sustainable polyesters

Tuesday, 25 September 2012

One of the driving forces for coatings technology is the use of renewable ressources. Now reasearchers found out one more way to derrive polyesters from natural ressources.

Polyesters form rapseed oil developed

Source: FikMik/Fotolia

Polyesters form rapseed oil developed

Source: FikMik/Fotolia

Polyesters are not only used as binders they are as well necessary in the reaction with isocyanates to gain polyurethanes.

Michael A. R. Meier and co-workers from Karlsruhe Institute of Technology, KIT, Germany have now explored plant oils and their derivatives as building blocks for the synthesis of 100 % renewable aliphatic long-chain polyesters.

Erucic acid from rapseed oil used

For this purpose, erucic acid, a monounsaturated ω-9 fatty acid readily available from rapeseed oil, was efficiently self-metathesized and hydrogenated to yield a linear saturated long-chain α,ω-dicarboxylic acid. The subsequent direct polycondensation of stoichiometric amounts of this C26 diacid with its corresponding C26 diol obtained from the diacid via reduction, proved to be a straightforward method to prepare aliphatic long-chain polyesters that are 100 % renewable. Their properties were investigated by means of various techniques, revealing high crystallinity, melting and degradation temperatures.
This development was published in Macromolecular Chemistry and Physics on 31. August.

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