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Saturday, 21 September 2019
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Raw materials & technologies, Technologies, Waterborne coatings

Dispersion stability of waterborne wood coatings studied

Monday, 16 July 2012

Study investigates waterborne polyurethane wood coatings based on rapeseed fatty-acid-methyl-esters as an alternative to technical fatty-acids and vegetable oils.

Waterborne polyurethane wood coatings based on rapeseed fatty-acid-methyl-esters have been investigated / Source: Ivan Kmit, Fotolia

Waterborne polyurethane wood coatings based on rapeseed fatty-acid-methyl-esters have been investigated / Source: Ivan Kmit, Fotolia

Trends in wood coatings are driven to waterborne systems and to renewable resources Vegetable oils are well known for wood coatings, e.g. alkyds or polyurethane dispersions. In this context, fatty-acid-methyl-esters turn out to be an alternative to technical fatty-acids and vegetable oils. High contents of hydrophobic oil-based monomers require a sufficient understanding of the dispersion stability.

German researchers from the Fraunhofer Institute for Wood Research show in their new study the influence of hydrophobic monomers, ionic centers, degree of neutralisation and stirring procedure to the particle size distribution and dispersion stability. Furthermore, they investigated the impact of these parameters on the resulting coating film properties. Read the complete study in "Progress in Organic Coatings”, vol. 74, issue 4, August 2012, pp. 705-711.

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