Influence of titanium dioxide pigment characteristics on durability of four paints (acrylic isocyanate, polyester melamine, polyester isocyanate, alkyd)

Gaumet, S.; Siampiringue, Narcisse; Lemaire, J.; Pacaud, Bernard

doi:10.1007/bf02692692

Cited by 18 publications

(10 citation statements)

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“…1, confirms that uncoated anatase (photocatalytic) and inorganically coated rutile (photostable), behave completely differently regarding gloss decay under UV irradiation [1,2,4,5,[23][24][25], which validates their use as photocatalytic and photostable references. Furthermore, we previously showed the order of the photocatalytic activity of the TiO 2 powders to be UA > CA(org) > CR(org) > CR(inorg) [5].…”

Section: Experiments I: the Effect Of Different Tio 2 Pigmentsmentioning

confidence: 68%

“…However, for pigments, the crystal structure and the inorganic coating are the most important characteristics influencing photocatalytic activity [5]. Uncoated anatase pigments have the highest photocatalytic activity, while inorganically coated rutile pigments are relatively photostable and even photoprotective [1,4,5,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…metal stearates or drying agents) and the binder (in this study linseed oil) [26]. Most earlier investigations have focused on pure titanium whitebinder mixtures to elucidate degradation phenomenology [1,2,23,25,27]. However, for the investigation of degradation rates, this constitutes an oversimplified formulation.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the effect of artists’ paint formulation on degradation rates of TiO2-based oil paints

et al. 2018

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This study reports on the effect of artists' paint formulation on degradation rates of TiO 2 -based oil paints. Titanium white oil paint exists in a multitude of different recipes, and the effect of the formulation on photocatalytic binder degradation kinetics is unknown. These formulations contain, among others, one or both titanium dioxide polymorphs, zinc oxide, the extenders barium sulfate or calcium carbonate and various additives. Most research performed on the photocatalytic degradation process focusses on pure titanium white-binder mixtures and thus does not take into account the complete paint system. Since photocatalytic oil degradation is a process initiated by the absorption of UV light, any ingredient or combination of ingredients influencing the light scattering and absorption properties of the paint films may affect the degradation rate. In this study three sets of experiments are conducted, designed using the design of experiments (DoE) approach, to screen for the most important formulation factors influencing the degradation rate. The benefits of using DoE, compared to a more traditional 'one factor at a time approach' are robustness, sample efficiency, the ability of evaluate mixtures of multiple components as well as the ability to evaluate factor interactions. The three sets of experiments investigate (1) the influence of the TiO 2 type, (2) the impact of different mixtures of two types of TiO 2 , ZnO and the additive aluminum stearate and (3) the influence of common extenders in combination with photocatalytic TiO 2 , on the photocatalytic degradation of the oil binder. The impact of the formulation on the degradation rate became apparent, indicating the shortcoming of oversimplified studies. The protective effect of photostable TiO 2 pigments, even in a mixture with photocatalytic TiO 2 pigments, as well as the negative effect of extenders was demonstrated. Furthermore, the ambiguous role of ZnO (photocatalytic or not) and aluminum stearate is highlighted. Neither can be ignored in a study of degradation behavior of modern oil paints and require further investigation.

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Section: Experiments I: the Effect Of Different Tio 2 Pigmentsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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Investigating the effect of artists’ paint formulation on degradation rates of TiO2-based oil paints

et al. 2018

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“…592 Reliable information on relative degradation rates of different coatings was obtained after short exposures. 568 It is suggested for UV sensitive binders that efforts concentrate on improving the dispersion of titanium dioxide (maximizing its screening effect) rather than on photocatalytic activity of pigment. 565 It is interesting to note that earlier discovered effect of titanium dioxide on weak and strong binder (see more in Section 15.1) has been confirmed by detailed studies of different paints.…”

Section: Important Changesmentioning

confidence: 99%

Weathering of Compounded Products

Wypych¹

2013

Handbook of Material Weathering

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“…Some minerals, such as amorphous silica (silica fume), have refractive index the same or lower than the resin and will be invisible in the dry film. They can be used to reduce the gloss of a clear coating without creating haze (Bremmell & Mensah, 2005;Shao et al, 2009;Gaumet et al, 1997;Walter, 1991).…”

Section: Introductionmentioning

confidence: 99%