Catalytic activity of primary and secondary driers towards the oxidation and hydroperoxide decomposition steps for the chemical drying of alkyd resin

Dubrulle, Laurent; Lebeuf, Raphaël; Thomas, Lynne H.; Fressancourt-Collinet, M.; Nardello‐Rataj, Véronique

doi:10.1016/j.porgcoat.2016.12.018

Cited by 22 publications

(16 citation statements)

References 40 publications

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“…Various experimental methods, including liquid chromatography [24], mass spectrometry [25], measurements of oxygen uptake [26], measurements of viscoelastic properties on quartz crystal microbalance [27] and vibration spectroscopy [28,29], have been used for investigation of the air-drying process on alkyd resins or their liquid model systems (e.g. fatty acids esters).…”

Section: Introductionmentioning

confidence: 99%

Effect of primary driers on oxidative drying of high-solid alkyd binder: Investigation of thickness effects by mechanical tests and infrared spectroscopy

Charamzová

Vinklárek

Honzı́ček

2018

Progress in Organic Coatings

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Catalytic activity of four primary driers was investigated in high-solid alkyd binder modified with tall oil fatty acids. The drying activity was established by mechanical tests. Infrared spectroscopy was used for detailed investigation of chemical changes during the autoxidation process. Due to strong thickness effect, the infrared 2 study was performed using attenuated total reflectance (ATR) technique, which measures spectra of a thin layer from the interface sample/ATR crystal (down surface of the sample). Coatings of 30 µm-wet thickness were found to be enough thin to be considered as a homogenously dried bulk with negligible effect of oxygen diffusion. It makes the 30 µm-layers very suitable for determination of kinetic parameters of the autoxidation process. For the first time, ATR-IR experiments on several samples of the same composition but different film thickness were used for detailed investigation of the thickness effect. Two well-distinguished modes of film-formation were observed in studied drier/binder systems. Front frontforming drying occurs when the autoxidation is fast and air-oxygen diffusion is slower than its consumption. In extreme case, the film-formation process is practically ceased because impermeable skin is formed and the coating is not through-dried for very long time. The second mode, homogenous drying, is observed when autoxidation is slow and oxygen consumption is not fast enough to establish oxygen gradient in the coating.

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Section: Introductionmentioning

confidence: 99%

Effect of primary driers on oxidative drying of high-solid alkyd binder: Investigation of thickness effects by mechanical tests and infrared spectroscopy

Charamzová

Vinklárek

Honzı́ček

2018

Progress in Organic Coatings

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“…Chemical drying of alkyd binders, catalyzed by transition metal compounds, is based on autoxidation of fatty acid tails, which involves a complex set of chemical processes. Mechanism of the drying has been extensively studied on liquid model compounds (i.e., unsaturated fatty acid esters, alkyl hydroperoxides) by various experimental techniques . The main steps of the radical chain process are outlined in Figure .…”

Section: Introductionmentioning

confidence: 99%

Chemical curing of alkyd resin catalyzed by benzoylferrocene: Performance, kinetics, and thickness effects

Honzı́ček

Vinklárek

2017

J of Applied Polymer Sci

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Catalytic properties of benzoylferrocene, as a representative of cobalt‐free drier, was investigated on alkyd resin modified with soybean oil. Mechanical tests, performed on alkyd films, revealed promising activity at low metal concentrations. A detailed analysis of time resolved infrared spectra was used for in‐depth investigation of chemical curing in the films. The experiments, performed in transmission mode, enabled determination of kinetic parameters for the autoxidation process. Effects of film thickness were investigated using attenuated total reflectance technique. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46184.

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“…Note that this amount still does not exceed the optimal catalyst concentration range determined by Dubrulle et al for fatty acid methyl ester oxidation (25-50 mm). [21,22] Them icrokinetic model was also used to explore the effects of temperature on the rate of oxidative curing. The microkinetic model predictions for key functional groups containing oxygen during the first 45 hours of cure time.…”

Section: Angewandte Chemiementioning

confidence: 99%

Modeling the Evolution of Crosslinked and Extractable Material in an Oil‐Based Paint Model System

et al. 2018

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The construction of mechanistic models for the autoxidation of fatty acid or ester substrates found in oil paint binders is a challenging undertaking due to the complexity of the large crosslinked species that form, and the small molecules that volatilize. Building models that capture this product diversity are made possible by automating the process of network generation. This work presents a microkinetic model for the autoxidation of ethyl linoleate catalyzed by cobalt(II) 2-ethyl hexanoate. The mechanism size was controlled by using a rate-based criterion to include the most kinetically relevant reactions from among the millions of possible reactions generated. The resulting model was solved and compared to experimental metrics. Quantities such as hexanal production and the consumption of unsaturated moieties were in good agreement with experiment. Finally, the model was used to explore the effect of the catalyst concentration and temperature on key measurables.

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Catalytic activity of primary and secondary driers towards the oxidation and hydroperoxide decomposition steps for the chemical drying of alkyd resin

Cited by 22 publications

References 40 publications

Effect of primary driers on oxidative drying of high-solid alkyd binder: Investigation of thickness effects by mechanical tests and infrared spectroscopy

Effect of primary driers on oxidative drying of high-solid alkyd binder: Investigation of thickness effects by mechanical tests and infrared spectroscopy

Chemical curing of alkyd resin catalyzed by benzoylferrocene: Performance, kinetics, and thickness effects

Modeling the Evolution of Crosslinked and Extractable Material in an Oil‐Based Paint Model System

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