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Graphene, an additive for the coatings market / Lynn Chikosha in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 15-17 Titre : Graphene, an additive for the coatings market Type de document : texte imprimé Auteurs : Lynn Chikosha, Auteur ; William Weaver, Auteur ; Matthew Sharp, Auteur Année de publication : 2022 Article en page(s) : p. 15-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Dispersions et suspensions Formulation (Génie chimique) Graphène Le graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur. Revêtements -- Additifs Revêtements organiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Graphene was first isolated in 2004 by Andre Geim and Konstantin Novoselov at Manchester University. They used sticky tape to remove single layers from the surface of graphite and deposit them on a silicon wafer. The isolation of graphene was a breakthrough for which Geim and Novoselov ultimately won the 2010 Nobel prize for Physics. In its purest form, graphene possesses an unsurpassed combination of electrical, mechanical and thermal properties, which gives it the potential to replace existing materials in a wide range of applications and, in the long term, to enable new applications. Graphene's unique two-dimensional structure in the nanoplatelet form results in very high aspect ratio, high surface area materials which are particularly suited for use as multi-functional additives in paints and coatings formulations. Applied Graphene Materials UK Ltd. (AGM) produces a range of dispersions of graphene nanoplatelets (GNPs), enabling property enhancement. AGM supplies its graphene in dispersion format, ensuring good dispersibility and stability. For this work, two graphene dispersions were used and are described. Note de contenu : - Water vapour transmission rate testing - Anticorrosion testing : Neutral salt spray testing - Electrochemical Impedance Spectroscopy - Chemical resistance - Table 1 : Graphene dispersions tested - Table 2 : Paint formulations for corrosion testing - Table 3 : Assessment of panels 1440hr neutral salt spray - Table 4 : Visual assessment after 28 days immersion in 10 % sodium hypochlorite - Table 5 : Visual assessment after 28 days immersion in 10 % sulphuric acid En ligne : https://drive.google.com/file/d/1bxZ_CbNmDf94zRVFrShs5-ZPx8agOKpV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37782 [article]

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Functionality and colour - improving paint systems with iron oxide pigments / Stephan Spiegelhauer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 26-28 Titre : Functionality and colour - improving paint systems with iron oxide pigments Type de document : texte imprimé Auteurs : Stephan Spiegelhauer, Auteur Année de publication : 2022 Article en page(s) : p. 26-28 Langues : Anglais (eng) Catégories : Durée de vie (Ingénierie) Oxyde de fer Pigments inorganiques Résistance thermique Index. décimale : 667.2 Colorants et pigments Résumé : Manufacturers of high-quality paints and varnishes are increasingly expecting the pigments used to not only offer a colouring effect, but also additional value in the development of innovative formulations or to help optimise existing formulations. Thanks to new process technologies and the use of various production processes, Lanxess has succeeded in improving the functional properties of iron oxide pigments such that they provide added value in the overall paint system. Lanxess makes use of the entire technological range in iron oxide production. Depending on the manufacturing process, iron oxides with differing particle structures can be produced. Modifications of the pigment surface and targeted doping in the crystal lattice are also possible. The interaction between the different methods of synthesis allows the colour development to be controlled in accordance with the customer's requirements on the one hand, and the production of pigments with specific properties that offer additional functionalities in terms of performance and process efficiency on the other. The following sections introduce current developments. Note de contenu : - Colour preservation upon exposure to high heat - Optimum colour development with low dose of additives - Transparent life-cycle assessment on the basis of environmental product declarations En ligne : https://drive.google.com/file/d/1QBFmqWXIkbnoPZMt8HbxQVSm4wv_XKkS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37783 [article]

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How to characterise kaolin so that you want to use it in your formulation and buy it from the supplier / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 33-38 Titre : How to characterise kaolin so that you want to use it in your formulation and buy it from the supplier Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 33-38 Langues : Anglais (eng) Catégories : Brillance (optique) Brillance (optique) -- Mesure Caractérisation Essais (technologie) Formulation (Génie chimique) Kaolin Opacifiants Revêtements -- Additifs:Peinture -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Each latex paint formulator, both experienced and novice, has encountered various kaolins in start point formulations, which are usually an additional filler, as a titanium dioxide substitution, sheen and gloss modifier of paints in the middle range of pigment volume concentration, or simply as an additional filler present in a formulation without indicating its special property to be added to it. For the latter reason, usually formulators of latex paints, not having sufficiently presented benefits of using a specific kaolin in the formulation, decide to replace it with other types of kaolin. Often, such a substitution is dictated by economic decisions, as the kaolin present in the stripe formulation may be more expensive than the one currently available for the production of current latex paints or requires an order as it has not been used in a given paint factory so far. Often, the lack of appropriate case studies showing the benefits of using this particular kaolin result in modification of the starting recipe in the direction of deteriorating the properties of the coatings, e.g. in terms of opacity, sheen and gloss, etc. Of course, such modifications are carried out mostly unconsciously, because the formulator intends to replace it with a different kaolin, which is assumed to be a similar kaolin that is currently used in production recipes. Note de contenu : - FACTORS IMPACTING CRITICAL PERFORMANCE FEATURES : Appearance of dry coating - Change from wet hiding to dry hiding - Hiding power at fixed spreading rate - Enhancing sheen and gloss when dry rubbing - KAOLIN USED IN THE STUDIES - EXPERIMENTAL : Slurries preparation - Paint formulations - TEST RESULTS : Appearance of dry coating - Wet-to-dry change - Hiding power at fixed spreading rate - Burnish resistance - Table 1 : Characteristics of akolins used in the case studies - Table 2 : Base formulation of paints prepared with slurries - Table 3 : Formulation constants for paints based on all kaolins used in the preparation of paints - Table 4 : Summary of the results of sheen and gloss measurements with the requirements of EN 1330 and MPI - Table 5 : Hiding power test results according to ISO 6504-3 En ligne : https://drive.google.com/file/d/1AIggtzEVNl1x3mg9_X9NtwIUP2c_goyC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37784 [article]

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Exploring the potential concern of microplastic - printing inks perspective / Pinaki Ranjan Samanta in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 39-42 Titre : Exploring the potential concern of microplastic - printing inks perspective Type de document : texte imprimé Auteurs : Pinaki Ranjan Samanta, Auteur ; M. Manisha, Auteur ; Abhinesh Kumar Singh, Auteur ; Shweta Chauhan, Auteur ; Prem Kumar Nautiyal, Auteur Année de publication : 2022 Article en page(s) : p. 39-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contamination chimique Encre d'imprimerie Matières plastiques -- Aspect de l'environnement Matières plastiques -- Détérioration Microplastiques Particules (matières) Index. décimale : 667.4 Encres Résumé : Microscopic plastic particles (microplastics) are widespread anthropogenic persistent contaminants that are impacting aquatic ecosystems. Microplastic (MP) accumulation in the environment and its contamination in food products has become a global threat to both environmental and human health. In recent times, heavy use of plastic food containers, plastic packaging, plastic bottles, disposable cups, infant feeders, plastic-coated metal, and paper cartons etc. has provoked the issue with direct contact and release of plastic flaking into food items. People store, transport, prepare, and consume food in plastic containers, but they aren't aware of the leaching plastic or migration of contaminants from containers into their foods and drinks and consequently, they are directly consuming MPs. In this article, we focus on revealing the release of MPs from such printed plastic packaging materials specifically from printing inks into our food and drinks. The consumption of such plastic particles damages the human systems and impairs the normal metabolism processes. Note de contenu : - Definition of microplastics and nanoplastics - Microplastic categories - Chemical compositions/source of microplastics - Degradation mechanism - Potential contamination from food packaging - Regulations - Challenges of analytical approach for identification of microplastics and nano plastics - Fig. 1 : Particulate matter less than 2.2 micrometers (PM25) or less than 10 micrometers (PM101 in diameter, often from soot, vehicle exhaust or dust - Fig. 2 : Plastics and contaminants from plastic processing aids or printing inks - Fig. 3 : Guidetines of analytical approach - Table 1 : Copied from ECHA Annex XV restriction report En ligne : https://drive.google.com/file/d/1a0ggzrH_rtE55XaRjf16qvpp8fMMyuVt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37785 [article]

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Study on influencing factors of stability of acrylate cathodic electrodeposition coatings / Xu Conghui in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 49-51 Titre : Study on influencing factors of stability of acrylate cathodic electrodeposition coatings Type de document : texte imprimé Auteurs : Xu Conghui, Auteur ; Zheqing Gong, Auteur ; Wangting Zhao, Auteur ; Lijun Chen, Auteur Année de publication : 2022 Article en page(s) : p. 49-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Dépôt électrolytique Polyacrylates Réticulants Revêtements -- Stabilité Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The stability of the CED coatings is vital to their storage and application, which have an important effect on the film of the CED coatings. In this work, CED coatings were prepared by mixing the synthetic resin and blocked isocyanate. The factors, which have an influence on the stability of the CED coatings, were studied and optimised. The optimum conditions for preparing the CED coatings with good stability are the following. The mixing process is that the resin and curing agent is mixed well, and then water is added to disperse in the blender. The rotational speed and dispersed time were 900r/min and 40min, respectively. TDI trimer was the curing agent of the CED coating. The neutralisation degree was 80%. Note de contenu : - EXPERIMENTAL : Materials - Preparation of CED coatings - Characterisation - RESULTS AND DISCUSSION : Influence of mixed process on stability of CED coatings - Effect of agitation on the stability of CED coatings - Determination of curing agent - Influence of components of cationic acrylate resin on stability of CED coatings - Table 1 : Effect of mixing process on stability of CED coatings - Table 2 : Influence of agitation on stability of CED coatings - Table 3 : Main parameters of curing agents - Table 4 : Effec(ts of curing agent on stability of CED coatings - Table 5 : Influences of different amine value and hydroxyl value on appearance and stability of CED coatings En ligne : https://drive.google.com/file/d/19TTEkh3IzJZZBS5kdemEFqnTBsaj3pND/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37786 [article]

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Innovative water-based polymer technologies for industrial coatings and graphic arts / Fabian Gyger in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 52-54 Titre : Innovative water-based polymer technologies for industrial coatings and graphic arts Type de document : texte imprimé Auteurs : Fabian Gyger, Auteur ; Erkan Erkan Yilmaz, Auteur Année de publication : 2022 Article en page(s) : p. 52-54 Langues : Anglais (eng) Catégories : Arts graphiques Bois -- Revêtements Cires Peinture industrielle Polymères en émulsion Réseaux polymères Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In many applications, such as wood coatings or in the printing industry, formulations based on modem acrylate polymer technologies provide excellent coating results, while at the same time utilising the advantages of water-based coating materials. They are the environmentally conscious choice compared to solvent-based coatings and during processing, whether industrial or do-it-yourself (DIY), water-based coatings are sale in use and very easy to handle. Solvent-based paints contain higher levels of organic compounds than water-based paints. However, these paints and their underlying polymers are being increasingly phased out because of the volatile organic compounds (VOCs) being released into the atmosphere upon evaporation, resulting in a strong odour and toxic effects on the environment. Stricter environmental regulations have required paint manufacturers to drastically reduce the VOC content of their paints. In addition to these greater environmental demands the quality requirements of peint manufacturers are also becoming increasingly demanding, for example in terms of appearance, feel or durability of high-performance coatings. For formulations that meet these challenges, Zschimmer & Schwarz offers tailor-made innovative water-based polymer technologies with the highest standards of quality and cost-effectiveness. Some of these technologies from the product portfolio are briefly presented here. Note de contenu : - Interpenetrating polymer network (IPN) - Multiphase technology - Wax-hybrid technology - Table 1 : Som product highlights and new developments for wood coatings - Table 2 : Some product highlights and new developments for graphic arts (OPV and primers) - Table 3 : Some of the special waxes for wood coatings and graphic arts En ligne : https://drive.google.com/file/d/1FsOWcqWwUVsdd26XA3ssd6Y6j1Lzd3vS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37787 [article]

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Polymer Paint Colour Journal Vol. 212, N° 4675 URL