Research on the influence of colloidal silica addition on water vapour permeability of paint coating

Wacław Brachaczek,

Wojciech Siemiński

Abstrakt

In the paper the influence of colloidal silica addition with different amounts of organic resin in facade paints formulations on the change of water vapour permeability of hardened coatings was researched. The results were obtained by means of experiments. To quantify the ability of paint to diffuse water vapour, Sdfactor, defined as equivalent to the thickness of non-rotating air layer, was used. For the quantitative determination of the relationship between water vapour permeability and the share of analyzed components in the formulation of paint a statistical model based on multiple regression was applied. Statistical analysis of the results showed that the effect of changes in the amount of colloidal silica in the formulation of paint on Sd value is small, compared to organic resin share changes.

Słowa kluczowe: colloidal silica, water vapour permeability, coating
References

Bergnah E., Colloid chemistry of silica in Colloidal Silica Fundamentals and Applications, CRC Press Taylor & Francis Group, Boca Ration 2005, Vol. 131, 9.

Otterstedt J.E., Greenwood P., Some Important, Fairly New Uses of Colloidal Silica Soll in in Colloidal Silica Fundamentals and Applications, Taylor & Francis Group, Boca Ration 2005, 737.

Brachaczek W., Masa tynkarska polikrzemianowo-silikonowa, Patent nr 214638, 2009.

Stanisz A., Przystępny kurs statystyki z zastosowaniem Statistica na przykładach z medycyny, StatSoft Polska Sp. z o.o., Kraków 2007.

Dunn O.J., Clark V.A., 2nd Ed., Applied Statistics: Analysis of Variance and Regression, John Villey, New York 1987.

Fox J., Applied Regression Analysis, Linear Models and Related Methods, Sage Thousand Oaks, 1997.

Farby i lakiery. Wyroby lakierowe i systemy powłokowe stosowane na zewnątrz na mury i beton. Część 1: Klasyfikacja.