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Penetration of water-borne alkyd emulsions and solvent-borne alkyds into wood

Eindringung von Alkyd-Emulsionen auf Wasser-Basis und von Alkyd auf Basis Lösemittel in Holz. Autoradiographie und REM-EDXA-Untersuchgen

Autoradiographic and SEM-EDXA studies

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Abstract

The ability of water-borne alkyd emulsions and solvent-borne alkyds to penetrate into sapwood of pine and spruce is demonstrated with autoradiography and SEM-EDXA. Application of test alkyds on to tangential surfaces shows that penetration occurs mainly through the radial rays. Only a few outer longitudinal tracheids are penetrated. Water-borne alkyd emulsions and solvent-borne alkyds have similar penetration patterns and seem to penetrate to the same extent. Penetration is reduced by factors such as increasing alkyd viscosity and pigmentation.

Zusammenfassung

Das Eindringen von Alkyd auf Wasser- und Lösemittelbasis in Splintholz von Kiefern und Fichten wird angezeigt mit Hilfe der Autoradiographie und der REM-EDXA. Nach Aufbringen der Alkydharze auf Tangentialflächen zeigt sich, daß das Eindringen vorwiegend durch die Holzstrahlen erfolgt. Nur wenige der äußere Longitudinal-Tracheiden werden penetriert. Alkyde auf Wasserbasis zeigen ein ähnliches Eindringverhalten wie Alkyd auf Lösemittelbasis, und zwar auch in quantitativer Hinsicht. Das Eindringen wird erschwert durch hohe Viskositäten und Pigmentgehalte der Harze.

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  1. Trätek-Swedish Institute for Wood Technology Resesearch, Box 5609, S-114 86, Stockholm

    R. M. Nussbaum

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  1. R. M. Nussbaum
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Nussbaum, R.M. Penetration of water-borne alkyd emulsions and solvent-borne alkyds into wood. Holz als Roh-und Werkstoff 52, 389–393 (1994). https://doi.org/10.1007/BF02615391

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