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13. Jul 2021 | Application Areas

Thermal degradation of polyurethane wood coating

Researchers have presented a case study on the thermal degradation of an acrylate-type polyurethane wood coating.
It became obvious that the thermal degradation of PUA occurred in a four-step process.
Image source: Myriams-Fotos - Pixabay (symbol image).

The thermochemical properties of a solvent-borne two-component polyurethane acrylate based wood coating (PUA) and of a flame-retardant counterpart (PUA-FR) treated with tris(1-chloro-2-propyl)phosphate (TCPP) were studied using within a temperature range between 50 and 600 °C.

Data were analysed regarding structural features of the cured coating material, particularly with respect to its thermal decomposition behavior.

Four-step process

It became obvious that the thermal degradation of PUA occurred in a four-step process in the following order:

In the case of PUA-FR, steps II) and III) were found to be mainly suppressed by TCPP at the expense of the decarboxylation of the ester side chains while degradation step IVa) was also retarded significantly.

The study has been published in Progress in Organic Coatings, Volume 157, August 2021.

EC Library Waterbased Acrylates for Decorative Coatings

Books

Waterbased Acrylates for Decorative Coatings

Aqueous polyacrylates, as binders, dispersing resins and thickening polymers, are nowadays impossible to do without as raw materials in the paints and coatings industry. Since their introduction in the 1950s and 60s, straight acrylic and styrene acrylic dispersions have established themselves as environment-friendly, high-performace alternatives to the solvent-borne, air-drying alkyd resin binders used principally before. The particularly wide performance spectrum and high level of variability of the polyacrylates has enabled the propagation and consistent ongoing development of this product class as binders for coating materials. This book gives an overall view of the preparation and properties of aqueous acrylic dispersions and also the special features pertaining to their use in the architectural coatings sector. Following a general introduction to dispersions and emulsion paints manufacture at the beginning of the book, specialized chapters give a deeper insight into the diverse products such as primers, masonry paints, interior paints, plasters, wood coatings and gloss emulsion paints. The book presents an picture of the preparation of acrylic binders and the formulation of architectural paints. It is aimed both at students and newcomers to the paints and coatings field as well as at experienced dispersion users and practitioners in the paints and coatings industry.

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