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Ajouter le résultat dans votre panierOptimum particle size is essential / Thomas Rentschler in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/99 (04/1999)
Titre : Optimum particle size is essential Type de document : texte imprimé Auteurs : Thomas Rentschler, Auteur ; Armin Reller, Auteur Année de publication : 1999 Article en page(s) : p. 80-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane
Pigments inorganiques
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : The size of the TiO2 crystallites is of great importance for both the specific properties and the required qualities of the products, respectively. Primary particle sizes of different TiO2 pigments were determined by the Scherrer method applying synchrotron radiation. The results correspond to findings calculated from their BET surfaces for large pigments as well as for ultra-fine TiO2 samples. These methods were compared to additional indirect particle size analysis in dispersed media applying various dispersion energies. The particle diameters of the base pigments were correlated to the light scattering properties and durability data upon artificial weathering of the final products in varnishes. Note de contenu : - Primary particles can flocculate, agglomerate or aggregate
- Highly coherent synchroton radiation determines crystallite particle size up to 1 µm
- Calciner discharges of rutile and anastase are tested
- Experimental conditions
- Each method of measurement may yield results unique to itself
- Increase of the particle size according to higher firing temperatures
- Spezific surface area confirms growth of the primary particles
- Particles size determination in dispersions provides complex information
- Exclusively primary particles of agglomerated rutile samples can not be attained
- Methods are applicable to industrial type TiO2 pigments
- Size of coherent scattering domains and actual prevailing particles are different for nanoscalic materials
- Particle sizes and size distibutions of final pigmentary products are practically constant
- Scaterring power increases strogly with increasing annealing temperature
- A sensitive method to monitor the correlation of pigment properties
- Anatase impurities deteriorate the durability of paints
- ConclusionsEn ligne : https://drive.google.com/file/d/14bvj7VdQjJXgsUIM6KZw6-3txDNGRFeq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11176
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/99 (04/1999) . - p. 80-89[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : New effect pigments using innovative substrates Type de document : texte imprimé Auteurs : Sigrid Teaney, Auteur ; Gerhard Pfaff, Auteur ; Katsuhisa Nitta, Auteur Année de publication : 1999 Article en page(s) : p. 90-96 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Pigments based on the layer-substrate interference principle are the most important types of pearlescent pigments today. Most of them consist of metal oxide layers coated on mica, a sheet layer silicate mineral. But mica pigment characteristics are limited to the thickness. Two new synthetic materials could be used in place of mica as substrates for effect pigments. New coloristic effects can be realized by suitable combination of silica flakes or alumina flakes as carrier and coating with relatively high index metal oxides such as titanium dioxide and iron oxide. Note de contenu : - Mica as a carrier for thin layers of metal oxides
- Metallic platelets acting as small mirrors
- Direct reflection, multiple reflection and the interference phenomenon
- High reflection coefficients resulting in enhanced chromatic effects
- New synthetic substrates replaced the natural mica
- Substrate particles of uniform thickness
- New properties with silica flake pigments
- TiO2- anatase containing pigments
- TiO2- rutile containing pigments
- Iron oxide generates strong interference effects
- Extraordinary optical effects
- Gonio-chromatic shift pigments
- Improved interference pigments
- Pigments based on alumina flake substrate coated with metal oxide
- Experimental conditions for crystal growth of Al2O3 flakes
- Application properties of silica and alumina flake pigments
- A new era of engineered control pigment coloristicsEn ligne : https://drive.google.com/file/d/1q0tCqkyK-2Vjdfso6_9hQU6PWA4ha3zw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11177
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/99 (04/1999) . - p. 90-96[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Making scratch resistance visible Type de document : texte imprimé Auteurs : B. Pourdeyhimi, Auteur ; Xuegin Wang, Auteur ; Fred Lee, Auteur Année de publication : 1999 Article en page(s) : p. 100-106 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Scratches and other mechanical damages of the coatings surface lead to changes in appearance like reduction in gloss and reflectivity. Yet no techniques for accurate characterization of these changes are yet available. The optical imaging technique described below for examining surface defects provides a main advantage : it is completely insensitive to the basecoat and its properties will not in any form influence the reflectivity of the topcoat. Note de contenu : - Superior to human perception
- To eliminate influence by the basecoat
- A three-dimensional optical arrangement
- Defective areas cause scattering
- Experimental conditions
- A modified mar test is developed
- Dry abrasion test
- Two series of experiments to examine the extent of damage
- Image analysis methods
- Different opinions to the reflectance of apperance change
- Standard errors of statistics are not relevant
- Texture roughness can be characterized using power spectral density
- Some mathematic details to PSD
- Greatest loss of reflectivity by polyurethane samples
- Fibers in the pad material caused curied path at low loads
- A perfect correlation between the gloss measurement and reflectivity
- Texture roughness is a robust measure of appearance at early stages of wearEn ligne : https://drive.google.com/file/d/1m6XikT29zaJUEfsc64MAIeaPlsXTMFi9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11178
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Coating additives, part IV : pigment suspensions and dispersing agents Type de document : texte imprimé Auteurs : Vladimir V. Verkholantsev, Auteur Année de publication : 1999 Article en page(s) : p. 108-118 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Surface-active agents which are specifically intended to intensify processes of dispersion of pigments and extenders (fillers) in liquid media and normally also contribute to the stabilization of consequent pigment suspensions are described as dispersing agents (pigment dispersants). Alike emulsifiers, intended to disperse resins and to stabilize resin dispersions, dispersing aids are normally specific for a type of liquid media (aqueous or non-aqueous), and in order to be efficient, dispersing aids are frequently required to be adjusted to dispersing conditions, nature of the treated pigment and other additives used in paint formulation. Note de contenu : - Converting dry pigments into pigment suspension
- Classification of pigments into morphologies
- Pigments characteristics affect the dispersion process and stability
- Dispersing agents
- The wet-grind and the dry-grind dispersion process
- Mill base formulation
- Dispersant selection and dispersant demand
- Calculation of dispersant demand value
- Practical aspects
- Mechanisms of dispersing processes
- Pigment wetting
- The breakdown of aggregates
- Stabilization of pigment suspension
- Dispersion kinetics
- Side effects
- Solvent-based paints
- Aqueous paints
- Polyphosphates and polyacrylatesEn ligne : https://drive.google.com/file/d/1SL2E3ENBFVpd1QkRn30kphbYHixvqVJg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11184
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/99 (04/1999) . - p. 108-118[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Electrochemical measurements to evaluate phosphate coatings Type de document : texte imprimé Auteurs : T. S. N. Sankara Narayanan, Auteur Année de publication : 1999 Article en page(s) : p. 138-141 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Phosphate pretreatment plays a vital role in the finishing of the automotive chassis and/or some special assemblies. The ever changing needs of the customer, necessitates the manufacturer to introduce new materials and paint finishes. However, such modifications induced severe complexity in the process stages, calling for an effective process control system. With the use of electrochemical measurements, an effective correlation of the quantitative values of the characteristic properties of the phosphate coating with the control charts of the actual production runs for every lot can be established. Note de contenu : - Data points to be correlated with control charts
- Use of electrochemical measurements isn't simply desirable but mandatory
- Two methods are highly reliable assessing porosity of phosphate coatings
- Anodic polarization can be used to evaluate the corrosion resistance
- Superiority of " electrochemical impedance spectroscopy" over the salt spray testEn ligne : https://drive.google.com/file/d/10yZJBGXg3g6Lgn6mHb_R8C9K3VrmdePX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11186
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/99 (04/1999) . - p. 138-141[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Globalisation from the viewpoint of a raw materials manufacturer Type de document : texte imprimé Auteurs : Manfred Bock, Auteur ; Helen Meiss, Auteur ; Hans-Ulrich Meier-Westhues, Auteur Année de publication : 1999 Article en page(s) : p. 120-136 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Globalisation is not - as is often asserted - an economic strategy in itself but a modern instrument for coordinating global business activities. It is driven by efforts to reduce costs and improve earnings. This paper is made up of three parts. The first part takes a current example at Bayer to illustrate the impact of globalisation. In the example described, the choice of location and an international manufacturing network are of key significance. In the second part, the phenomenon of globalisation is discussed in general and with respect to the coating raw materials industry. It is shown how tightly globalisation is interwoven with other trends in economic development. The third part examines the coating raw materials market in detail. This market offers wide-ranging potential to suppliers who commit themselves to a global presence and innovation. Note de contenu : - An integrated global chemical and pharmaceutical company
- Globalisation in the automotive industry
- Global strategies in the coating raw materials, coating and automotive sector
- Global trends in automotive finishingEn ligne : https://drive.google.com/file/d/1u34bgjRvj6sisWy6UXRAwjZx0R6aDl1k/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33532
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Code-barres Cote Support Localisation Section Disponibilité 000603 - Périodique Bibliothèque principale Documentaires Disponible
Titre : The glass transition temperature Type de document : texte imprimé Année de publication : 1999 Article en page(s) : p. 150-152 Langues : Anglais (eng) Catégories : Transition vitreuse Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Liquid-like state of equilibrium
- Fig. 1 : Specific volume of a polymer as a function of temperature on cooling from high temperatures. 1 : rapid cooling ; 2 : slow cooling
- Fig. 2 : Storage modulue E', loss modulus E" and loss factor tan δ of an acrylic copolymer as a function of temperatureEn ligne : https://drive.google.com/file/d/11sZorcizN57xFmPCabMmBgHi2zR3ixf4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33533
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| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 000603 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
