Epoxy silanes in reactive polymer emulsions / Ming J. Chen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 875 (12/1997) . - p. 49-55 Titre : Epoxy silanes in reactive polymer emulsions Type de document : texte imprimé Auteurs : Ming J. Chen, Auteur ; Fred D. Osterholtz, Auteur ; Antonio Chaves, Auteur ; Philbert E. Ramdatt, Auteur ; Bruce A. Waldman, Auteur Année de publication : 1997 Article en page(s) : p. 49-55 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes Réticulants Réticulation (polymérisation) Revêtements Revêtements -- Additifs Revêtements en phase aqueuse:Peinture en phase aqueuse Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy silanes are effective additives for the crosslinking of carboxy and amino latexes and polyurethane dispersions. A series of epoxy silane additives have been evaluated in both one-pack and two-pack systems. It is found that the structure and water solubility of the epoxysilane as well as the pH of the latex determine silane stability. New water insoluble epoxy silanes achieve long-term shelf stability in emulsions yet crosslink upon application of the coating. Formulating principles, performance improvements, and catalytic cure profiles are reported. Carboxyl-modified waterborne polymer dispersions with post-added epoxy silanes provide curable coatings, in which properties such as mar, chemical and solvent resistance, adhesion, and durability are dramatically improved. In many applications, this approach is a potential candidate for crosslinkable waterborne systems free of aziridines and formaldehyde. Note de contenu : - EXPERIMENTAL : Preparation of a 40% β-(3,4-epoxycyclohexy)ethyltriethoxysilane emulsion - Preparation of a 40% glycidoxypropylmethyldiethoxysilane emulsion - Preparation of epoxysilane/reactive emulsion polymer admixtures - Testing methods - RESULTS AND DISCUSSION : The role of epoxysilane curing in performance improvement - Stable one-pack epoxycyclohexysilane emulsion/reactive latex system - Glycidoxy silanes for two-packs systems - Formulation principles - Wood coating applications - Time-temperature cure profile - Catalytic effects on the cure behavior - Improvement of solvent resistance in polyurethane dispersions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18069 [article]

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Film-boosting benefits / Ping Jiang in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2021)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2021) . - p. 24-29 Titre : Film-boosting benefits : Hydrophobic silicone resin for high-performance water-borne coatings Type de document : texte imprimé Auteurs : Ping Jiang, Auteur ; Paula Cousino, Auteur ; Ning Lu, Auteur ; Antonio Chaves, Auteur Année de publication : 2021 Article en page(s) : p. 24-29 Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Liants Matériaux filmogènes Polyacryliques Résistance au rayonnement ultraviolet Résistance aux taches Résistance chimique Revêtements en bâtiment:Peinture en bâtiment Revêtements en phase aqueuse 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 : Increasing regulatory and environmental requirements and the growing expectations of end users present a challenge when developing a high-performance water-borne coating system. An innovative product based on a water-borne hydrophobic silicone resin and additive technology platform overcomes the difficulties of combining silicone materials with organic water-borne resins and offers a range of benefits. Note de contenu : - Experimental - Elastic films with the novel resin - Co-binder in non-pigmented acrylic latex system - Co-binder in architectural paints - Post-add modifier with several resistance benefits - Enhanced and more resistant concrete surfaces - Versatile resin demonstrates good film-forming properties - Table 1 : Comparative study on blending the novel WB silicone resin with acrylic latex - Table 2 : Example of a satin paint formulation [29 % PVCJ. - Table 3 : Typical physical properhies of films cured with the navel resin - Table 4 : Reduced water absorption and improved UV resistance using the novel resin as a co-binder - Table 5 : Stain & chemical resistance comparison of coated wood panels En ligne : https://drive.google.com/file/d/1e4ccokMD5MMpwAT33kORrfXJ1a9HVq7k/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35860 [article]

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New non-isocyanate moisture curable silylated resin for protective coating applications / Michael Seeber in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 29-34 Titre : New non-isocyanate moisture curable silylated resin for protective coating applications Type de document : texte imprimé Auteurs : Michael Seeber, Auteur ; Nayeem Soad, Auteur ; Vikram Kumar, Auteur ; Dean Kondos, Auteur ; Antonio Chaves, Auteur ; Martin Wusik, Auteur Année de publication : 2017 Article en page(s) : p. 29-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Dépôt par pulvérisation Essais de résilience Essais dynamiques Flexion (mécanique) Formulation (Génie chimique) Isocyanates -- Suppression ou remplacement Métaux -- Revêtements protecteurs Photostabilité Polyuréthanes Réticulation à l'humidité Revêtement monocomposant Silylation La silylation est l'introduction d'un groupe silyle, généralement substitué (R3Si–), dans une molécule. Stabilité au stockage Surfaces -- Nettoyage Vernis Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) polyurethane coatings are widely used as the top layer of protective coatings systems to provide performance benefits, such as UV durability, flexibility and chemical resistance. However, these 2K products are coming under increasing scrutiny due to the presence of unreacted isocyanate in the uncured formulation. There have been efforts made ta develop non-isocyanate based coatings however, it is a challenge to do so while providing ail performance benefits of a 2K Polyurethane coating. A new non¬isocyanate moisture curable silylated resin for protective coating applications is discussed in this paper. This resin is targeted to enable the coating formulator ta develop a one¬component (1K) non-isocyanate coating that provides performance on par with the current 2K polyurethane coatings. Some of the key coating properties that were studied and are . discussed herein are UV durability, flexibility, corrosion resistance and chemical resistance. Note de contenu : - EXPERIMENTAL : Metal cleaning process - Spray coating application - Design of experiments/formulation - Testing protocols - Chemical resistance test - RESULTS AND DISCUSSION : Viscosity and shelf stability of Y-19243 resin and model formulations - Flexibility and impact resistance of Y-19243 resin - Outdoor durability and chemical resistance - Corrosion resistance - TABLES : 1. Basic clear coat sample formulation - 2. Grind paste sample formulation using TiO2 and Y-19243 - 3. Grind paste sample formulation using TiO2 and Y-19243 with a pigment binder of 0.35 - 4. Cross hatch adhesion values after seven day cure at room temperature - 5. Pass/fail results for 3/4" Mandrel bend test on CRS substrates - 6. Summary of colour and gloss values before and after exposure to QUV-B weathering for eight weeks - FIGURES : 1. Konig hardness values as a function of # oscillations vs room temperature cure time over 60 days - 2. Evolutions of viscosity (cP) as measured at two week time intervals after ageing in a 50°C oven. Measurements were taken of Y-19243 resin as produced, as well as model clear formulations - 3. Visual images of mandrel bend tests. A. Exp. clear, no catalyst B; Exp clear with catalyst ; C. Exp white, no catalyst, with catalyst ; E. Comm 1K-A ; F. Comm 1K-B ; G. 2K PU - 4. Frontal and reverse impact resistance values in lbs force for all model formulations and commercial controls. Panels were tested after 30 days of room temperature cure - 5. Chemical resistance ratings scale - 6. Visual representation of areas of cured films exposed to all solvents tested - 7. Corrosion resistance after 1500 hr exposure to NSS. a) Com. 1K-A ; b) Comm. 1K-B - c) Comm. 2K PU ; d) Exp white, no catalyst ; e) Exp white, catalyst En ligne : https://drive.google.com/file/d/1LqialbhrHGYZelQtXxUle97cwrueSbAY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29327 [article]

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Silanes in coatings technology / M. J. Chen in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 12 (12/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 12 (12/1996) . - p. 539-550 Titre : Silanes in coatings technology Type de document : texte imprimé Auteurs : M. J. Chen, Auteur ; Antonio Chaves, Auteur ; F. D. Osterholtz, Auteur ; E. R. Pohl, Auteur ; W. B. Herdle, Auteur Année de publication : 1996 Article en page(s) : p. 539-550 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Revêtement  'Silane  organofonctionnel'  Technologie  Polymère Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings technology is evolving toward higher solids and water-borne systems. Many functionalized polymers, comonomers or additives have been developed and introduces as the viscosity and performance demands on coatings systems have increased. The volume of patent literature, the ability to create low temperature curing systems, the potential for aqueous systems, and the durability and thoughness imparted by silane crosslinking make an exploration of this technology worthwhile. In this article, mention will be made of some of the extensive literature describing the use of OFS in coatings and related polymeric materials. Literature on the use of silanes as pigment dispersants will not be discussed. Some studies from the author's laboratories on the benefits of using OFS instead of alternative crosslinking agent or adhesion promoters will be described as well as work in solvent-borne acrylic automotive clear coatings and on latex systems. Note de contenu : - Silanes for mar resistance in solvent-based automotive clear coats - Stable silylated latex systems Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17127 [article]

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Silanes in high-solids and waterborne coatings / Ming J. Chen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 870 (07/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 870 (07/1997) . - p. 43-51 Titre : Silanes in high-solids and waterborne coatings Type de document : texte imprimé Auteurs : Ming J. Chen, Auteur ; Fred D. Osterholtz, Auteur ; Eric R. Pohl, Auteur ; Philbert E. Ramdatt, Auteur ; Antonio Chaves, Auteur ; Valerie Bennett, Auteur Année de publication : 1997 Article en page(s) : p. 43-51 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Haut extrait sec Réticulants Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Silanes have been used effectively in solvent-based or waterborne coatings to crosslink binder resins, increase pigment dispersion and improve end use properties, such as mar and solvent resistance and durability. A series of silylated styrene acrylic order to have been prepared and studied in order to understand the chemical and physical parameters that influence the mar resistance and weathering properties of the cured coatings. It was found that the silane content affects the indentation hardness, coefficient of friction, modulus, and toughness of the cured coatings. A relationship between these coating characteristics and mar resistance is demonstrated. In water dispersed and emulsion polymer systems, silanes maximize properties, such as adhesion and solvent resistance. Silanes are incorporated into these systems via copolymerization or post addition. Recent advances in waterborne silane technologies are discussed, including methods of improving formulation stability. Note de contenu : - INTRODUCTION : Silanes in high-solids systems - EXPERIMENTAL : Characteristics of silylated acrylic clearcoats - Coating tests - RESULTS AND DISCUSSION : Tensile properties, siloxane crosslinking, and coating properties - Correlation of modulus, friction, and hardness on mar resistance of clearcoats - The influence of difunctional silane ester on clearcoats - Silanes in waterborne systems - EXPERIMANTAL : Preparation of silylated vinyl acrylic latexes - RESULTS AND DISCUSSION : Stable sylilated acrylic and vinyl acrylic latexes - Performance improvements of silylated emulsion polymer coatings - Effects of catalysts in the silylated vinyl acrylic systems - Siloxane crosslinkage of silylated vinyl acrylic films Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18261 [article]

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