Bringing surfaces under control / Heike Semmler in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2020)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2020) . - p. 16-21 Titre : Bringing surfaces under control : How to optimise coating surfaces by using specialFy modified siloxanes Type de document : texte imprimé Auteurs : Heike Semmler, Auteur ; Roger Reinartz, Auteur ; Ingrid K. Meier, Auteur ; K. Michael Peck, Auteur Année de publication : 2020 Article en page(s) : p. 16-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs Formulation (Génie chimique) Jaune Pigments Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Résistance à l'abrasion Revêtements -- Propriétés mécaniques Revêtements en phase aqueuse -- Additifs Revêtements organiques Vernis en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Surface control additives can be engi-neered to provide a range of benefits in water-borne coating formulations. This article describes a study aimed at clari-fying some general structure-property relationships. Note de contenu : - Benefits of siloxanes - Siloxanes and slip - Recoatability is a problem - Experimental : Design of surface control additives - Properties in two wood-coating formulations - Test of emulsion-type additives in a clearcoat formulation - Better blocking and scratch resistance - Test of 100 % active matter additives in a pigmented formulation - Blocking - Cross-cut adhesion - Organo-modified siloxanes as versatile toolbox for surface effects - Table 1 : Characteristics of siloxane-based surface control additives used in this study - Table 2 : Water-borne self-crosslinking modified acrylic clear wood-coating based on "NeoCryl XK-12" - Table 3 : Performance of surface confrol additives when post-added fo a wafer-borne self-crosslinking modified acrylic wood coating ("NeoCryl XK-12") - Table 4 : Pigmented water-borne acrylic wood coating based on "Acronal LR 9014" and Pigment Yellow concentrate - Fig. 1 : Scratch resistance testing and ratings - Fig. 2 : Comparative effects of surface control additives on the blocking properties of a pigmented water-borne acrylic wood coating - Fig. 3 : Cross-cut areas of panels that were coated twice with pigmented water-borne acrylic wood coatings containing 0.5 wt % surface control additives En ligne : https://drive.google.com/file/d/150Acf66umSHnqwoe2lBQgmhz4Wnp-6Va/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34288 [article]

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Colouring nature / Jacques Resoort in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2013)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2013) . - p. 136-139 Titre : Colouring nature : Advances in coatings for orchids and succulents Type de document : texte imprimé Auteurs : Jacques Resoort, Auteur ; Roger Reinartz, Auteur Année de publication : 2013 Article en page(s) : p. 136-139 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Fleurs -- Coloration Mouillage (chimie des surfaces) Surfactants Teinture Tension superficielle Index. décimale : 667.9 Revêtements et enduits Résumé : The Dutch are well known for cultivating flowers and plants. What is less known is that several companies have specialised themselves in production coatings for this colourful industry. As with most coatings, it needs a specialised approach. Note de contenu : - Good wetting - Dynamic surface tension reduction - Low contact angle En ligne : https://drive.google.com/file/d/1QG5SbXw367oB_Y7rzKhB5WUOIy5I6pM_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17819 [article]

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Fine-tuning coating surface control through the use of modified siloxanes / Ingrid K. Meier in COATINGS TECH, Vol. 17, N° 3 (03/2020)  

[article]  inCOATINGS TECH > Vol. 17, N° 3 (03/2020) . - p. 58-66 Titre : Fine-tuning coating surface control through the use of modified siloxanes Type de document : texte imprimé Auteurs : Ingrid K. Meier, Auteur ; Fadia Namous, Auteur ; K. Michael Peck, Auteur ; Roger Reinartz, Auteur Année de publication : 2020 Article en page(s) : p. 58-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs Jaune Pigments Polyacryliques Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Polymères ramifiés Polyuréthanes Résistance à l'abrasion Revêtements en phase aqueuse -- Additifs Vernis en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Siloxane-based additives are critical tools in coating applications because their structures can be varied to provide a broad range of performance benefits in many types of formulations and chemistries. Surfactants and defoamers are some of the more commonly recognized additive classes, but many other functionalities can be derived from siloxane chemistries, particularly attributes related to surface control such as flow and leveling, slip, scratch resistance, and haptic properties. This extensive range of performance attributes is achievable due to the broad flexibility inherent in siloxane chemistry, allowing a fine-tuned balance of compatibility, incompatibility, and surface activity. As with many additive types, a broad range of functionalities creates many options for improvement and innovation but also presents challenges in finding the right additive and optimizing to achieve the desired performance. This article will attempt to clarify the general structure-property relationships that drive the performance attributes of siloxane additives and detail the continuum that exists between wetting, leveling, defoaming, and slip within this chemistry class. Surface control properties and testing will be reviewed and related to recent evaluation work conducted in developing novel siloxane surface control additives. Note de contenu : - INTRODUCTION : Siloxane chemistry - Siloxane-based Surface control additives in coating applications - The need for recoatability : The balancing act - RESULTS AND DISCUSSION : Experimental - Design of the new surface control additives - Evaluations of new surface control additives in waterborne wood coatings - Fig. 1 : Representation of the chemical structure of polydimethylsiloxane - Fig. 2 : Typical chemical structure of a comb siloxane - Fig. 3 : Typical chemical structure of an a,w-siloxane - Fig. 4 : Structures of organo-modified polymediméthylsiloxane surface control additives - Fig. 5 : Micrograph of a polyurethane dispersion containing 1.0 wt% of an emulsion of a crosslinked siloxane (MAG 1000 x HV : 15.OkV D : 7.7 mm) - Fig. 6 : Visual appearance ratings - Fig. 7 : Scratch resistance testing and ratings - Fig. 8 : Comparison of the effects of surface control additives on the blocking properties of a pigmented waterborne acrylic wood coating - Fig. 9 : Comparison of cross-cut areas of panels that have been coated twice with pigmented waterborne acrylic wood coatings containing 0.5 wt% surface control additives - Table 1 : Waterborne self-crosslinking modified acrylic clear wood coating - Table 2 : Waterborne self-crosslinking acrylic clear wood coating - Table 3 : Pigment yellow 42 (PY 42) concentrate - Table 4 : Pigmented water-based acrylic wood coating - Table 5 : Characteristics of siloxane based surface control additives - Table 6 : Performance of surface control additives when post-added to a commercial water-based oil-modified polyurethane clear semi-gloss wood coating applied on Leneta Charts - Table 7 : Performance of surface control additives when post-added to a water-based self-crosslinking modified En ligne : https://drive.google.com/file/d/1KB37PGXF00a1AKdeY-Ku1tj2XbEAolux/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33907 [article]

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How to optimize coating surfaces by using specialty modified siloxanes / Heike Semmler in SURFACE COATINGS INTERNATIONAL, Vol. 104.2 (03-04/2021)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 104.2 (03-04/2021) . - p. 122-125 Titre : How to optimize coating surfaces by using specialty modified siloxanes Type de document : texte imprimé Auteurs : Heike Semmler, Auteur ; Roger Reinartz, Auteur ; Ingrid K. Meier, Auteur ; K. Michael Peck, Auteur Année de publication : 2021 Article en page(s) : p. 122-125 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs Formulation (Génie chimique) Jaune Pigments Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Résistance à l'abrasion Revêtements en phase aqueuse -- Additifs Vernis en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Siloxane-based additives are critical tools in coating applications: their structures can be varied in order to provide a broad range of performance benefits in many types of formulations. Surfactants and defoamers are commonly recognised additive classes, but also many other functionalities can be derived from siloxane chemistries, particularly attributes related to surface control, such as flow and levelling, slip, scratch resistance and haptic properties. This extensive range of performance is achievable due to the broad flexibility inherent in siloxane chemistry, allowing a fine-tuned balance of compatibility, incompatibility and surface activity. As with many additive types, a broad range of functionalities creates many options for improvement and innovation, but also presents challenges in finding the right additive and optimising molecular structure to achieve the desired performance. In order to clarify some general structure-property relationships, a study was carried out. Due to their unique interfacial activity, siloxane-based surface control additives have become invaluable tools in the coating formulator's tool box. Many surface control additives are capable of mitigating surface energy gradients that can exist within a liquid film immediately after application ; thus, they can improve flow, prevent retraction, minimise cratering, enable better surface levelling and ensure a flawless surface appearance. As their surface activity increases, surface control additives can also render special properties to the surface of the coating. For example, depending on their chemical structures, certain surface control additives can impact surface slip, affect haptic properties (surface 'feel'), impart scratch resistance, act as anti-blocking agents and even create a release effect on the surface of the cured coating. This is of great importance in many areas of application, but especially for wood coatings, which typically have to combine very good aesthetics with high mechanical resistance. The property of 'slip' is characteristic of a smooth sliding motion across the coating that results from a reduced coefficient of friction. lt is quantified as the force needed to slide a mass across the coating surface. The material properties of both the substrate and the object to be moved are reflected in the static and dynamic coefficients of friction with contributions from the chemical composition of the coating and the interactions arising from it, as well as surface roughness. Surface control additives with large polydimethylsiloxane segments and a high degree of surface activity can ensure particularly slippery surfaces. Additionally, coatings with a high slip often feel smooth and silky. Coatings may also resist scratching when the scraping object slips off the surface rather than penetrating the coating film ; however, force-dependent scratch resistance of a coating can only be significantly improved if the surface control additive used contains functional groups that do not interact strongly with one another. Organo-modified siloxanes, with a high percentage of polydimethylsiloxane domains, exhibit particularly weak interactions both with each other and with other materials. This can make them ideal for this purpose. Moreover, during the drying process, organo-modified siloxanes continually migrate to the air-liquid interface, producing a lubricating film that significantly reduces the coefficient of friction of the coating. When a cured coating surface has a strong polydimethylsiloxane character due to the use of a surface control additive, it is also more likely to resist blocking — adhesion of the dried coating to another freshly coated surface or other substrates. While it is possible to achieve a variety of desired benefits by using siloxane-based surface control additives that have large polydimethylsiloxane segments, most coatings eventually need to be recoated. The downside to employing strongly hydrophobic and oleophobic surface control additives is the tendency for the resultant coating to have a very low surface energy and to be very difficult — if not impossible — to recoat. Even if a second coating layer can be applied to such a surface, lack of adhesion and the tendency for the second coating layer to show craters are true problems. Note de contenu : - Design of surface control additives - Properties in two wood coating formulations - Test of emulsion-type additives in clear coat formulation - Table 1 : Characteristics of siloxane-based surface control additives in this study - Table 2 : Waterborne self-crosslinking modified acrylic clea wood coating based on NeoCryl XK-12 - Table 3 : Performance of surface control additives when post-added to a waterborne self-crosslinking modified acrylic wood coating (based on NeoCryl XK-12) - Table 4 : Pigmented waterborne acrylic wood coating based on ACRONAL LR 9014 and Pigment Yellow 42 concentrate - Fig. 1 : Scratch resistance testing and ratings - Fig. 2 : Comparison of the effects of surface control additives on the blocking properties of a pigmented waterborne acrylic wood coating - Fig. 3 : Comparison of cross-cut areas of panels that have been coated twice with pigmented waterborne acrylic wood coatings containing 05 wt% surface control additives En ligne : https://drive.google.com/file/d/1LAnKlTYPYRTilx7GwkMEANR6lSywT8qi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35999 [article]

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Less is more for new technology / Markus Vogel in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 1 (01/2018) . - p. 28-32 Titre : Less is more for new technology : Novel silicone resin for high-performing, lower-cost facade paints and plasters Type de document : texte imprimé Auteurs : Markus Vogel, Auteur ; Roger Reinartz, Auteur ; Daniel Brünink, Auteur Année de publication : 2018 Article en page(s) : p. 28-32 Langues : Anglais (eng) Catégories : Applications extérieures Hydrophobie Résistance aux conditions climatiques Revêtement mural:Peinture murale Revêtements en bâtiment:Peinture en bâtiment Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Index. décimale : 667.9 Revêtements et enduits Résumé : Facade paints need to be both decorative and weathering resistant as well as meet increasing customer requirements. Extending the colour range and environmental compatibility at the same time as reducing costs poses a real challenge. However, researchers believe they have developed a new hydrophobing agent using silicone resin technology that sets a new standard. Note de contenu : - High water-vapour diffusion with silicone resin - Fast-developing water resistance - Highly effective at low concentrations - Lower dirt pick-up - Greater colour choice with organic pigments - Processing and storage benefits - Environmentally compatible for broad market access - Reduced costs and greater performance En ligne : https://drive.google.com/file/d/1fPZjiJxxk2p5YCpKljSVecUgmTuxFig6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29768 [article]

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Multifunctional, gemini-type coalescing surfactants enable formulation of lower VOC waterborne coatings / Ernie C. Galgoci in COATINGS TECH, Vol. 3, N° 1 (01/2006)  

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Raising the bar for façade paints and plasters / Markus Vogel in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4664 (09/2020)  

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Sticking to the subject / Roger Reinartz in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2015)  

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Surfactant technology - the key ingredient / Roger Reinartz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4570 (03/2012)  

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