Enabling safer, effective crosslinking with breakthrough resin innovations / Craig Frankum in SURFACE COATINGS INTERNATIONAL, Vol. 107.4 (07-08/2024)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 107.4 (07-08/2024) . - p. 293-295 Titre : Enabling safer, effective crosslinking with breakthrough resin innovations Type de document : texte imprimé Auteurs : Craig Frankum, Auteur ; Ad Overbeek, Auteur ; Fred Bückmann, Auteur Année de publication : 2024 Article en page(s) : p. 293-295 Langues : Anglais (eng) Catégories : Polyéthylèneimine Réticulants Revêtements (produits chimiques):Peinture (produits chimiques) Index. décimale : 667.9 Revêtements et enduits Résumé : With consumers and painters increasingly conscious of the safety profiles of decorative coatings, manufacturers around the world are working to further deliver solutions. Covestro supports them with this task through its cutting-edge R&D, innovation support and broad toolbox of advanced resin technologies. Just one example is its polymeric aziridine crosslinker that offers lowered toxicity levels while still delivering equal performance to traditional aziridine crosslinkers. With recent studies suggesting that 25% of all indoor air pollution now comes from paint, efforts to improve the safety profile and health impact of our decorative paints and coatings are more important now than ever. In recognition of this issue, and as a player early in the coatings’ value chain, Covestro continually works to create safer paint ingredients that can keep manufacturers, applicators and consumers safe. As part of these efforts, for instance, we have worked to lower levels of volatile organic compounds (VOCs) and biocides in our resins, eliminate triethylamine and reduce the use of other tertiary amines that can contribute to strong odours, phase out N-methylpyrrolidone (NMP), and improve the film formation of our systems to reduce the need for co-solvents. We also have a dedicated innovation platform related to detox and compliance, enabling us to further phase out chemicals of concern. In this way, we ensure that our customers can develop safer coatings that future-proof their portfolios against impending legislation changes. Note de contenu : - The functional Performance challenge - NeoAdd PAX : an innovative crosslinking - Excellent secondary functional properties - All the performance, half the labelling En ligne : https://drive.google.com/file/d/11rsPr3JQOwMcRI-ItrjG4-1Y9mUwgR5f/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41388 [article]

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Polymer heterogeneity in waterborne coatings / Ad Overbeek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 1 (01/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 1 (01/2010) . - p. 1-21 Titre : Polymer heterogeneity in waterborne coatings Type de document : texte imprimé Auteurs : Ad Overbeek, Auteur Année de publication : 2010 Article en page(s) : p. 1-21 Note générale : Bibliogr. Langues : Américain (ame) Tags : Coating  Heterogeneous  Waterborne  Gloss  Adhesion  Nano-structured  Hybrid Index. décimale : 667.9 Revêtements et enduits Résumé : An overview is presented of the progress in understanding polymer heterogeneity over the last 20 years and how this has contributed to the improvement of coatings. Solvent-based polymers are homogeneous in nature, since all polymeric materials tend to be dissolved in the same solvent mixture. This is different for most waterborne polymers, which tend to be present in a compartmentalized way. Most polymeric materials are present in particles, which are separated by the continuous aqueous phase. This gives excellent opportunities to create particle morphologies that form the basis for the film morphology after drying of the coating. This article gives an overview of the various types of heterogeneity which are accessible in waterborne polymers and will show how heterogeneity in the polymer can contribute to the solution of several persistent problems of the coating industry. DOI : 10.1007/s11998-009-9201-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9201-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8343 [article]

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Prolonged open time / Ad Overbeek in EUROPEAN COATINGS JOURNAL (ECJ), N° 10/02 (10/2002)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 10/02 (10/2002) . - p. 38-46 Titre : Prolonged open time : for new generation decorative paints Type de document : texte imprimé Auteurs : Ad Overbeek, Auteur ; Jan Bouman, Auteur ; Ronald Tennebroek, Auteur Année de publication : 2002 Article en page(s) : p. 38-46 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The growth of waterborne paints in the higher performance decorative paint segments has been slowed down due to a lack of open time, rheology, film build and scratch resistance. Over the years the improvement of the open time has been an intense area of research, but to date the typical paint rheology and brushing performance of a solvent based paint could not be achieved in a waterborne system. Very low viscosity oligomers are a solution for the open time problem. These oligomers remain liquid even after the evaporation of water and are self-crosslinking to achieve good final properties. The oligomers are combined with a dispersed polymer to reduce tack free times of the resulting coatings and to increase the rate of development of the properties. A model system is described where this effect is demonstrated. Note de contenu : - Synthesis of model systems - Test methods for wet edge open time, dust free and tack free time. - Phase inversion point - a critical point - Change in rheology during drying - Closing the paint - Drying at different blend ratios of oligomer and polymer - New technology compared to commercial paints En ligne : https://drive.google.com/file/d/12U78JR2RIRI87w4I18AM2aXG2Yl3d9ag/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10709 [article]

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Self-crosslinkable urethanes and urethane/acrylics / Ronald Tennebroek in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/97 (11/1997)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11/97 (11/1997) . - p. 1016-1021 Titre : Self-crosslinkable urethanes and urethane/acrylics Type de document : texte imprimé Auteurs : Ronald Tennebroek, Auteur ; J. Geurts, Auteur ; Ad Overbeek, Auteur ; André S. Harmsen, Auteur Année de publication : 1997 Article en page(s) : p. 1016-1021 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dureté (matériaux) Polyacrylates Polyurée Polyuréthanes Résistance à l'abrasion Résistance chimique Réticulation (polymérisation) Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Aqueous polyurethane dispersions are widely used in the coatings industry because of their high performance. A new technology has been developed to achieve enhanced properties of aqueous urethanes and urethane-acrylics through the design of unique (self-)crosslinkable polyols. Synthesis and properties of a wide range of urethanes and urethane-acrylics with varying crosslink densities and morphology will be discussed. Note de contenu : - Urethane properties - Aqueous polyurethane dispersions - General composition - Synthesis - One component self-crosslinkable urethane dispersions - Comparison between autoxidative and azomethine crosslinking - Comparison of urethane/acrylate composites with urethane/acrylate blends - Results and discussion - Mechanical properties - Chemical resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11437 [article]

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Self-crosslinking surfactant free acrylic dispersions / Fred Bückmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/01 (06/2001)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6/01 (06/2001) . - p. 53-60 Titre : Self-crosslinking surfactant free acrylic dispersions Type de document : texte imprimé Auteurs : Fred Bückmann, Auteur ; Ad Overbeek, Auteur ; Tijs Nabuurs, Auteur Année de publication : 2001 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Surfactant free acrylic dispersions with a core-shell particle morphology are described, where the shell polymer is a self-crosslinking polymeric dispersant used for the stabilisation of the polymer particle. The phase ratio's and the magnitude in which the Tq's of the polymeric dispersant and the subsequently formed polymer differ were found to be of crucial importance to obtain a very low MFT and hence very good film formation combined with very high hardness and good anti blocking properties. In addition films cast from these dispersions have excellent chemical resistances which make these dispersions very useful as binders for high performance coating systems. Note de contenu : - Polymer entanglement is crucial for film formation - Hydrophilic low molecular weight polymer backbones - Sequential polymerisation for phase separated particle morphologies - Crosslinking for improved chemical resistance - The role of the surfactant - Concept of surfactant free dispersions with self dispersing polymers - Polymeric self-crosslinking surfactant - Properties of polymeric self-crosslinking surfactant - The effect on film formation - Investigating model dispersions - Application in high performance coatings En ligne : https://drive.google.com/file/d/1WE47U7biHXhhSqMNLtu5nlFDSZNj63yi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10954 [article]

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Self-crosslinking surfactant free acrylic dispersions / Fred Bückmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/01 (07-08/2001)

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