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TiO2 efficiency in coatings : products and techniques for opacity optimisation in PAINTINDIA, Vol. LXVII, N° 5 (05/2017)
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Titre : TiO2 efficiency in coatings : products and techniques for opacity optimisation Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 76-88 Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Dioxyde de titane
Dispersions et suspensions
Opacité (optique)
pH
Revêtement en phase solvant:Peinture en phase solvant
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.2 Colorants et pigments Résumé : For those who have been in the Coatings industry for long enough, the rollercoaster ride of TiO2 price comes as no surprise. That said, the days of an even 10-year cycle in price have changed to shorter periods of high price (often painfully high) followed by longer periods of relatively low price (painful for the suppliers). Even when relatively "cheap", TiO, continues to be one of the most expensive raw materials in a coating and so ensuring that the pigment you buy is used correctly and efficiently remains a crucial business objective. Note de contenu : - TiO2 selection
- Pigment dispersion
- Solvent systems
- Water-based systems
- The role of pH and surface charge
- Dispersants and dispersant requirements
- Physical dispersion
- Pigment crowding and spacing
- Cost effective opacity
- Engineered composite technology - FP-pigment "opacity pigment"En ligne : https://drive.google.com/file/d/1jj19-Tjh-qx8uoIt1WgLXgMjEY7PLaor/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28874
in PAINTINDIA > Vol. LXVII, N° 5 (05/2017) . - p. 76-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19144 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Topcoat for military aircraft Type de document : texte imprimé Auteurs : Christopher J. Lyons, Auteur Année de publication : 2017 Article en page(s) : p. 38-52 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Avions -- Revêtements:Avions -- Peinture
Brillance (optique)
Colorimétrie
Composés organiques volatils
Dépôt par pulvérisation
Durée de vie en pot
Epaisseur -- Mesure
Essais (technologie)
Opacité (optique)
Polyuréthanes
Revêtements -- Finition:Peinture -- Finition
Revêtements -- Propriétés chimiques:Peinture -- Propriétés chimiques
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : A waterborne two-pack polyurethane finish coating formulated for military aircraft provides extended durability performance suited for Australia’s harsh climate as well as substantial reductions in content of volatile organic compounds when compared with high-solids solvent-based aerospace coatings. A formulating practice using commercially available hydroxyl-functional polyurethane dispersions combined with hydrophilically modified polyisocyanate resins enables compositions to be made that are suitable for spray application, have drying properties useful for aircraft workers, and cure to form films with the specified resistance and flexibility properties. Note de contenu : - EXPERIMENTAL : Approaches to formulating - Spray application - Solvent-based benchmarks - Testing - Gloss and color measurements - Exterior weathering - Calculations VOC levels
- RESULTS : In-can properties - Accelerated storage stability - Mixing - Spray application - Potlife - Freeze-thaw stability - VOC data - Early dry properties - Surface dry condition - Tape resistance - Hard-dry condition - Cure - Opacity - Surface appearance - Color and gloss - Dry adhesion - Water resistance - Humidity resistance - Heat resistance - Reverse impact flexibility - Low-temperature flexibility - Mandrel bend - Fluid resistance - Cleanibility - Corrosion resistance : salt spray - Corrosion resistance : Filiform - Exterior durabilityEn ligne : https://drive.google.com/file/d/1f9QfmlQ-40MIe-GWCAxvN5hsqaTxWCEg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28791
in COATINGS TECH > Vol. 14, N° 6 (06/2017) . - p. 38-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19050 - Périodique Bibliothèque principale Documentaires Disponible Water-based system to prevent the yellowing of opaque coatings on knotted pine wood / Rodrigo Coniglio ; Wolfgang Gaschler ; Leonardo Clavijo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
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Titre : Water-based system to prevent the yellowing of opaque coatings on knotted pine wood Type de document : texte imprimé Auteurs : Rodrigo Coniglio, Auteur ; Wolfgang Gaschler, Auteur ; Leonardo Clavijo, Auteur Année de publication : 2023 Article en page(s) : p. 781-788 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Décoloration
Essais accélérés (technologie)
Liants
Mesure
Opacité (optique)
Primaire (revêtement)
Résistance au jaunissement
Revêtements -- FinitionIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-based opaque coatings used on pine wood show undesired discolorations related to the presence of knots which have an outstanding high concentration of extractives. These compounds, of both polar and nonpolar nature, migrate through the polymeric structure resulting in a yellow–brown spot over the knot. A water-based coating system comprising a polar primer and a nonpolar topcoat proved to have remarkable performance preventing the migration of the extractives and the discoloration of the painted surface. The knot bleeding resistance was tested following EN 927–7. The color of the coating over the knot was measured using CIELab coordinates, and the resulting color difference in comparison with the surrounding paint was in all cases less than the accepted limit for discoloration of opaque coatings. The need to have the combined system to successfully block the whole spectrum of extractives was proved by the evaluation of the individual coatings as well as the utilization of polar dispersions as topcoats. The system presented in this work constitutes a solution to the discoloration of water-based coatings over knotted pine wood. Note de contenu : - MATERIALS AND METHODS : Wood material - Coatings - Coating procedure - Artificial weathering procedure - Discoloration measurement
- RESULTS AND DISCUSSION : Performance of a nonpolar binder - Performance of a polar binder - Performance of a system of a polar primer and nonpolar topcoat - Performance of a system of a polar primer and polar topcoats
- Table 1 : Hansch parameter for the binders used in this work
- Table 2 : Exposure parameters according to EN ISO 4892–2:2006
- Table 3 : Discoloration results of the staining test on 20 boards painted with the binder A
- Table 4 : Maximum discoloration measured for boards painted with the binder B as pigmented coating
- Table 5 : Discoloration results of the staining test on 20 boards painted with the binder A as primer and the binder B as topcoat
- Table 6 : Detail of the systems used to test the performance of a polar primer and polar topcoat
- Table 7 : Maximum discoloration measured for boards painted with the systems with polar primer and polar topcoatsDOI : https://doi.org/10.1007/s11998-022-00723-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00723-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39318
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 781-788[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Waterborne hybrid (alkyd/styrene acrylic) emulsion polymers and exterior paint applications / Nurullah Kartaloglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
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Titre : Waterborne hybrid (alkyd/styrene acrylic) emulsion polymers and exterior paint applications Type de document : texte imprimé Auteurs : Nurullah Kartaloglu, Auteur ; Suna Elif Akçin, Auteur ; Mesut Eren, Auteur ; Ali Delibas, Auteur Année de publication : 2023 Article en page(s) : p. 1621-1637 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Chanvre et constituantsLe chanvre ou chanvrier (Cannabis sativa L.) est la seule espèce du genre botanique Cannabis. Ce terme latin est souvent utilisé aussi comme nom vernaculaire pour distinguer les variétés de chanvre cultivé à usage industriel des variétés de cannabis à usage récréatif ou médical. C'est une espèce de plante annuelle, de la famille des Cannabaceae. La graine de chanvre s'appelle le chènevis.
Copolymère styrène acrylique
Durée de vie (Ingénierie)
Essais dynamiques
Formulation (Génie chimique)
Huiles et graisses végétales
Latex
Matériaux hybrides
Opacité (optique)
Polyalkydes
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Revêtements en phase aqueuse
Revêtements en phase aqueuse:Peinture en phase aqueuse
Traction (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Since alkyd resins include hazardous solvents, converting alkyds into waterborne hybrid polymers is an essential research topic. Here, alkyd/styrene acrylic waterborne hybrid polymers were synthesized in the presence of monomers, water, emulsifiers, and an initiator by using synthesized alkyd resins at 0%, 5%, 10%, and 15% ratios based on the total monomer ratio. A mini-emulsion technique and a semi-batch polymerization method were used to synthesize the latexes. Two different biosources, tall oil fatty acids (TOFA) and hemp seed oils (HSO), were used to synthesize the alkyd resins. Synthesized waterborne hybrid latexes and their films were analyzed by using FTIR, NMR, particle size, MFFT, TGA, DSC, CA, AFM, and mechanical tests. It was determined that the type and concentration of the alkyds affected the viscosity, particle size, Tg and MFFT values, and appearance. It was also identified that alkyd incorporation took place with grafting and that the alkyd concentration was particularly effective in increasing the particle size. In addition, experiments were carried out on waterborne paint systems for exterior paint by using synthesized hybrid polymer emulsions. It was observed that the alkyd content was not effective in changing the paint color in hybrid latexes. As a result, it is suggested that hybrid waterborne latexes could be used for exterior paints. Note de contenu : - EXPERIMENTAL : Materials - TOFA-based alkyd resin synthesis - HSO-based alkyd resin synthesis - Synthesis of alkyd/styrene acrylic waterborne hybrid polymers - Preparation of paints
- TESTS AND MEASUREMENTS : Analysis for TOFA and HSO - Analyzes of alkyd/styrene acrylic waterborne hybrid polymers - Analysis of paints
- RESULTS AND DISCUSSION : Evaluation of TOFA and HSO - Evaluation of alkyd resins and alkyd/styrene acrylic waterborne hybrid polymers - Evaluation of paint samples prepared with hybrid latexes
- Table 1 : Chemicals used in the study
- Table 2 : Formulation of alkyd resin synthesis
- Table 3 : Recipes for preparing hybrid latexes
- Table 4 : Formulation of the paint
- Table 5 : Physicochemical properties of polymer emulsions
- Table 6 : Tensile test values
- Table 7 : Properties of high-gloss opaque and transparent paints
- Table 8 : Effect of QUV exposure on color parameters of hybrid polymer films
- Table 9 : Hardness control resultsDOI : https://doi.org/10.1007/s11998-023-00767-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00767-6.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39976
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1621-1637[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Whiter than snow : Optimisation of dry hiding using multi-minerals in high-PVC paints Type de document : texte imprimé Auteurs : Helen Dollani, Auteur Année de publication : 2023 Article en page(s) : p. 56-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Blanc (couleur)
Carbonates
Concentration pigmentaire volumique
Dioxyde de titane
Formulation (Génie chimique)
Kaolin
Opacifiants
Opacité (optique)
Revêtements décoratifs:Peinture décorative
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : White paints commonly use titanium dioxide for its excellent hiding power, but the industry needs new approaches. One option is to carefully combine minerals of the right particle size, shape, porosity and structure to allow optimised light scattering. This will help formulators improve paint properties such as opacity, whiteness and gloss with minimal or zero TiO2, whilst meeting mechanical requirements. Note de contenu : - Practical assessment of scattering pores or air voids
- Richt mineral composition influences particle packing
- Mineral shape and size optimise scattering
- A balancing act between opacity and scrub resistance in high PVC paints
- Further performance optimisation without TiO2
- Figure : Examples of mineral morphology
- Table : Comparison of novel zero and low TiO2 forulation performance vs. German commercial paintsEn ligne : https://drive.google.com/file/d/1Kmaj-dOWP2kJYaxXuOzkbv7YLXYmekaZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38908
in EUROPEAN COATINGS JOURNAL (ECJ) > (03/2023) . - p. 56-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23900 - Périodique Bibliothèque principale Documentaires Disponible