Singlet oxygen drying of alkyd resins and model compounds

Hubert, Julie; Venderbosch, R. A. M.; Muizebelt, W. J.; Klaasen, R. P.; Zabel, Klaus

doi:10.1007/bf02696154

Cited by 69 publications

(19 citation statements)

References 7 publications

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“…Ove alkidne smole umrežavaju pod dejstvom svetlosti i kiseonika iz vazduha (oksidativno sušenje) [4,5]. Sam mehanizam umrežavanja uključuje otkidanje vodonika sa alilne metilenske grupe pri čemu nastaje slobodni radikal koji reaguje sa kiseonikom iz vazduha i nastaje hidroperoksid [6][7][8]. Razlaganjem tako nastalog hidroperoksida nastaju slobodni radikali koji dovode do umrežavanja alkidne smole.…”

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The influence of the size and surface modification of TiO2 nanoparticles on the rheological properties of alkyd resin

Radoman¹,

Dzunuzovic²,

Jeremić³

et al. 2013

Hem Ind

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IzvodSferne čestice TiO 2 različitih veličina dispergovane su u alkidnoj smoli. Površinska modifikacija nanočestica TiO 2 izvedena je propil galatom i lauril galatom. Ispitivan je uticaj veličine nanočestica TiO 2 , koncentracije, kao i vrste površinske modifikacije na reološka svojstva alkidne smole. Dobijeno je da je viskoznost pripremljenih disperzija veća od viskoznosti čiste smole, da raste sa smanjenjem prečnika čestica i opada sa povećanjem frekvencije. Površinski modifikovane čestice imaju veći uticaj na viskoznost alkidne smole nego nemodifikovane zbog povećanja efektivnog zapreminskog udela čestica u disperziji. Za najmanju koncentraciju TiO 2 viskoznost je veća kada je modifikacija izvršena lauril galatom, dok sa povećanjem koncentracije, zbog manje disperzione stabilnosti čestica modifikovanih propil galatom, dolazi do njihove aglomerizacije i naglog povećanja viskoznosti.

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unclassified

The influence of the size and surface modification of TiO2 nanoparticles on the rheological properties of alkyd resin

Radoman¹,

Dzunuzovic²,

Jeremić³

et al. 2013

Hem Ind

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“…Photochemical peroxidation of oleic and linoleic acid esters. 104,107 Non-radical pathway for peroxidation of unconjugated and conjugated fatty acids involves reaction with molecular oxygen in the first excited singlet state ( 1 O2) lying 22 kcal/mol above the ground triplet state ( 3 O2). 104,105 Singlet oxygen is not generated by simple thermal processes.…”

Section: Peroxidationmentioning

confidence: 99%

Curing of Air-Drying Paints: A Critical Review

Honzı́ček

2019

Ind. Eng. Chem. Res.

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This review article provides a comprehensive overview of curing processes relevant to air-drying paints. It is focused not only on binders derived from plant oils but also on oriental lacquers and their synthetic congeners as their solidification and hardening processes are driven by chemical reactions with air-oxygen. The main aim of this article is to bring a critical look on this subject omitting deep-seated misinterpretation and oversimplification often appearing in the field of paint technology. Such objective was achieved by utilization of the latest knowledge appearing in various areas of chemical research, e.g. organic chemistry, biochemistry, physical chemistry, computational chemistry and inorganic chemistry.

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“…Alkyd resins cure via a physical and chemical drying process that requires catalysis [11,12] (Figure 2). A liquid paint dries physically by releasing solvent (water or organic) after application to a surface.…”

Section: Radical Curing Chemistrymentioning

confidence: 99%

The Evolution of Catalysis for Alkyd Coatings: Responding to Impending Cobalt Reclassification with Very Active Iron and Manganese Catalysts, Using Polydentate Nitrogen Donor Ligands

Simpson¹,

Maaijen²,

Roelofsen³

et al. 2019

Catalysts

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Autoxidation processes to achieve curing of alkyd resins in paints, inks, and coatings are ubiquitous in many applications. Cobalt soaps have been employed for these applications for many decades and most of the paint and ink alkyd resin formulations have been optimized to achieve optimal benefits of the cobalt soaps. However, cobalt soaps are under increased scrutiny because of likely reclassification as carcinogenic under REACH (Registration, Evaluation, Authorisation, and Restrictions of Chemicals) legislation in Europe. This is critical, since such coatings are available for regular human contact. Alternative manganese- and iron-based siccatives have been developed to address this need for over a decade. They often show very high curing activity depending on the organic ligands bound to the metal centers. Recently, new classes of catalysts and modes of application have been published or patented to create safe paints, whilst delivering performance benefits via their unique reaction mechanisms. Besides the use of well-defined, preformed catalysts, paint formulations have also been developed with mixtures of metal soaps and ligands that form active species in-situ. The change from Co-soaps to Mn- and Fe-based siccatives meant that important coating issues related to radical-based curing, such as skinning, had to be rethought. In this paper we will review the new catalyst technologies and their performance and modes of action, as well as new compounds developed to provide anti-skinning benefits.

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Singlet oxygen drying of alkyd resins and model compounds

Cited by 69 publications

References 7 publications

The influence of the size and surface modification of TiO2 nanoparticles on the rheological properties of alkyd resin

The influence of the size and surface modification of TiO2 nanoparticles on the rheological properties of alkyd resin

Curing of Air-Drying Paints: A Critical Review

The Evolution of Catalysis for Alkyd Coatings: Responding to Impending Cobalt Reclassification with Very Active Iron and Manganese Catalysts, Using Polydentate Nitrogen Donor Ligands

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