Stand oil

General chemical structure of stand oil (R ¹ , R ² and R ³ are alkyl or alkenyl radicals with mostly an odd number of carbon atoms). Stand oil is - like other vegetable oils - a mixture of tri- esters of glycerine .

Stand oil (also Bennebroeker oil ) is oxidatively hardening or drying oil that has been thickened by heating and polymerized before .

Stand oil is thicker and more viscous than the original, natural oil. In the film state, stand oils show an improved resistance to moisture and weathering and a reduced tendency to yellow.

Thick oil is the generic term for all oils with artificially increased viscosity . Especially linseed oil and wood oil were treated so, but there are also other hardening oils (eg. As poppy seed oil , perilla oil , walnut oil or sunflower oil, and Tran ). They are made by heating in the absence of air as well as by heating and blowing in air (blown oils, blown oils). Nowadays stand oil is produced industrially, the natural oil is heated to approx. 250 ° C in a protective gas atmosphere . Originally linseed oil was heated to a high temperature and set on fire and then extinguished by covering the kettle.

Cooked oils are made by heating suitable oils to around 150 ° C with small amounts of substances called "dryers", which gives the oil the property of drying quickly into elastic skin. Almost all commercial cooked oils are made from linseed oil, although other drying oils can be used. The added dryers can be the following or similar compounds: lead and manganese oxides, acetates , oxalates , borates , rosinates and insoluble fatty acid salts, calcium and lead salts and mixtures thereof.

Web links

Wikiwoodworking

Individual evidence

↑ DIN 55945 . In: German Institute for Standardization e. V. (Ed.): Colorants 1 . 7th edition. DIN-Taschenbuch 49.Berlin, Vienna, Zurich 2012, ISBN 978-3-410-23202-5 , pp. 547 .
↑ Brock, Goeteklas, Mischke: Textbook of paint technology. 2nd edition, Vincentz, 1998, ISBN 3-87870-569-7 , p. 51.
↑ Entry on Blown Oils. In: Römpp Online . Georg Thieme Verlag, accessed on November 24, 2017.
↑ Bernhard Schultz: Farbwarenkunde. Vieweg, 1953, ISBN 978-3-322-97907-0 , pp. 58, 59.
^ Hermann Suida , Heinrich Salvaterra: Rust protection and rust protection paint. Springer, 1931, ISBN 978-3-7091-5152-5 , p. 65.
^ Percival J. Fryer, Frank E. Weston: Technical Handbook of Oils, Fats and Waxes. Volume 2, Cambridge Univ. Press, 1918, 2014, ISBN 978-1-107-66088-5 (Reprint), p. 242.

[1] DIN 55945 . In: German Institute for Standardization e. V. (Ed.): Colorants 1 . 7th edition. DIN-Taschenbuch 49.Berlin, Vienna, Zurich 2012, ISBN 978-3-410-23202-5 , pp. 547 .

[2] Brock, Goeteklas, Mischke: Textbook of paint technology. 2nd edition, Vincentz, 1998, ISBN 3-87870-569-7 , p. 51.

[3] Entry on Blown Oils. In: Römpp Online . Georg Thieme Verlag, accessed on November 24, 2017.

[4] Bernhard Schultz: Farbwarenkunde. Vieweg, 1953, ISBN 978-3-322-97907-0 , pp. 58, 59.

[5] Hermann Suida , Heinrich Salvaterra: Rust protection and rust protection paint. Springer, 1931, ISBN 978-3-7091-5152-5 , p. 65.

[6] Percival J. Fryer, Frank E. Weston: Technical Handbook of Oils, Fats and Waxes. Volume 2, Cambridge Univ. Press, 1918, 2014, ISBN 978-1-107-66088-5 (Reprint), p. 242.