Dépouillements

Pigment dispersion and stabilization / Amit S. Agrawal in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 56-58 Titre : Pigment dispersion and stabilization Type de document : texte imprimé Auteurs : Amit S. Agrawal, Auteur ; Ajit K. Padhi, Auteur Année de publication : 2015 Article en page(s) : p. 56-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions -- Stabilité Fragmentation Mouillage (chimie des surfaces) Pigments Index. décimale : 667.9 Revêtements et enduits Résumé : Pigments are inherent to paint formulations. They provide color strength, gloss and color intensity to the paint. To use powder pigments, formulators need to grind the pigments first. The particle size distribution of the mill base influences a lot the quality and more specifically the color strength of die final paint. Complete dispersion of pigment and extender in the liquid medium is essential for optimization properties such as process ability, shelf-life stability, color development, opacity and gloss. Moreover, the quality of the dry paint film is very much related to the uniformity of the distribution of the pigment. Separation and settling, inferior mechanical film properties and low film transparency are often related to insufficient pigment dispersion. In order to optimize the stage of dispersion, well controlled conditions for the dispersion process and dispersion stabilization need to be maintained. Note de contenu : - DISPERSING PROCESS : Destroying of agglomerates (Acting of mechanical forces - Physical and chemical interactions - Wetting of pigment surfaces - Difference in surface tension between pigment and liquid media - Oil absorption of pigment - Stabilisation of a dispersion - MECHANISMS OF DISPERSION : Electrostatical stabilization - Sterical stabilization - EFFECT OF GRINDING TIME AND MEDIA ON DISPERSION - COROLLARY OF PROPER DISPERSION - SELECTION OF RAW MATERIALS FOR COATING FORMULATION En ligne : https://drive.google.com/file/d/12eLHlRwC4XRTnfmEzxPbXwCDPLQmYLwv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24146 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Micro capsules. The precision guided munitions of coating technology / Ganesh Bathiri in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 61-71 Titre : Micro capsules. The precision guided munitions of coating technology Type de document : texte imprimé Auteurs : Ganesh Bathiri, Auteur Année de publication : 2015 Article en page(s) : p. 61-71 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Core-Shell Diffusion (physique) Encapsulation Microcapsules Revêtement de surface Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings are nothing but a stable dispersion of various raw materials in a continuous phase which are applied onto the substrates to accomplish both decorative and protective functions. Choice of the functional raw materials plays a key rote in this process. As the coating technology strives to design "Intelligent & Smart" coatings which sense and responds to the changing service dynamics with the aim of enhancing the service life of coatings to Amazonian proportions, it becomes imperative that the raw materials are to be incorporated in such a manner that they remain unaffected for long both in-can and after application, be readily available as and when required to achieve specific tasks, at specific locations. Microcapsules are made by encapsulating the functional materials within an appropriate shell and incorporating them within the paint helps to achieve ail of this and more. Microcapsules helps to preserve the functional materials for as long as they are required, deliver them as and when required and at appropriate locations within the coating matrix — something similar to that of precision guided munitions. This review article guides the reader through the process of micro encapsulation, preparation of micro capsules with elaboration on specific techniques, release mechanisms & profiles and some of the performance attributes they can impart to the coatings and in the conclusive part of this article some of the key challenges that are yet to be overcome are also discussed. Note de contenu : - Microencapsulation - Micro-capsule - Core - Shell - Morphology of capsules - Micro encapsulation techniques - Chemical process - Physical processes - Release profiles & mechanisms - Applications - Applications in coating industry - Specific applications in surface coatings En ligne : https://drive.google.com/file/d/1MA5efgjrRsPewz5osx1MhA6WT0PYSOwR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24147 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Dispersing without grinding media / Sven Hoffmann in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 72-74 Titre : Dispersing without grinding media Type de document : texte imprimé Auteurs : Sven Hoffmann, Auteur ; Michael Schmidt, Auteur Année de publication : 2015 Article en page(s) : p. 72-74 Langues : Anglais (eng) Catégories : Dispersions et suspensions -- Appareils et matériels Index. décimale : 667.9 Revêtements et enduits Résumé : The Business Unit Grinding & Dispersing, one of three business units of the global NETZSCH Group, offers a comprehensive program for the many challenges in mechanical process engineering. Here the Business Unit is primarily involved in the areas of wet and dry grinding, mixing, dispersing, deaeration and classifying. The laboratory- and production-scale machines, as well as complete production lines, are used in almost ail areas of industry, such as the future-oriented nanotechnology sector, the production of ink, minerals or foods. The bundling of processing know-how, our extensive machine program, solutions for customer-specific problems and our global presence are unique and hence the strength of the business unit. A crushing or dispersing process is required in the manufacture of many different products. For some applications with the goal of achieving deagglomeration, disaggregation or delamination, manufacturing technologies are often applied for which optimization is both desired and necessary. With the new OMEGA technology from NETZSCH-Feinmahltechnik GmbH, optimization is often possible for such applications in terms of power requirements, output and service Iife of the machine as well as ease of cleaning and operation. The function of this machine is similar to that of a high-pressure homogenizer. Due to the unique modular construction of the dispersing unit, the essential difference is that the OMEGA operates with a maximum pressure of only 700 bar. Thus, compared to agitator bead mills or high-pressure homogenizers, a savings in specific energy of more than 50% can be achieved for some applications. Note de contenu : - Comminution processes : true comminution and dispersing - Economic dispersionizer OMEGA - Operating principle - Areas of application - Application example : titanium dioxide - Application example : defibrillation of natural fibers or unbundling of carbon nanotubes - FIGURES : 1. Design of the OMEGA economic dispersionizer - 2. Design of NETZSCH dispersion device with valve, turbulence, nozzle and filter module - 3. Titanium dioxide suspension after one pass in the OMEGA - 4. Aqueous CNT suspension, aqueous cellulose suspension En ligne : https://drive.google.com/file/d/1jqL-x_zqQLgCzc_TXJv5qQW9sfbIk56s/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24149 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Hydrophilic polyisocyanates : the best balance between performance and environmental concern / Philippe Olier in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 75-80 Titre : Hydrophilic polyisocyanates : the best balance between performance and environmental concern Type de document : texte imprimé Auteurs : Philippe Olier, Auteur Année de publication : 2015 Article en page(s) : p. 75-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Essais d'adhésion Formulation (Génie chimique) Polyisocyanates hydrophiles Réticulants Revêtements bi-composant:Peinture bi-composant Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : It is no secret today that the quest for more environmentally friendly and healthier products is a key preoccupation among a lot of chemical companies. In many cases, regulation constraints have led to reconsider bath technologies and products but certainly not performances. Coatings particularly is one field in which high performance is required since the function of a coating, outside of the aesthetics, is mainly to protect the substrate it is applied on. Polyurethane coatings, especially two components systems, are very appreciated for their outstanding performances, especially durability and outdoor weatherability. When health and environmental preoccupations started to be at the forefront, 2K polyurethane waterborne coatings became naturally a route to follow, especially to reduce Volatile Organic Compounds (VOC) in the formulations. The challenge was above all to design waterborne formulations containing polyisocyanates which would be stable, regarding the reaction with water. Such a formulation should provide enough time to enable application and film formation with good end properties. Hydrophilic polyisocyanates were the answer and many synthesis routes were tried, each one having of course, advantages and drawbacks. In this paper, we will present a study aiming to highlight differences regarding the nature of the hydrophilic polyisocyanates. Latest developments of Vencorex in this field will be also included. Note de contenu : - POLYISOCYANATE : HOW TO MAKE IT HYDROPHILIC ? - EXPERIMENTAL : Hardeners - Starting point formulations - RESULTS : Emulsification ability - Application properties - TABLES : 1. Solubility parameters of hexamethylene trimer or biuret - 2. Characteristics of the hardeners - 3. Formulations - 4. Evaluation of adhesion with cross hatch and tape adhesion test - FIGURES : 1. : Particle size distribution of Easaqua XL 600 and polyisocyanate 1 into water - 2. Visual aspect of formulations regarding the mixing time and the nature of the polyisocyanate - 3. VOC, gloss and Koenig hardness of coatings made with Easaqua XL 600 and polyisocyanate. 1. Polyisocyanate 1 contains 20% solvent - 4. Contact angle of a drop of water with the surface. High angle values indicate hydrophobic surfaces. Angle values over 90° are the sign that the liquide does not wet the substrate - 5. Contact angle measurement of water on 2K waterborne coatings (initial and after 3 days at 100% RH and 50°C - 6. Visual aspect of the coatings after crosshatch and tape adhesion test - 7. Visual aspect of coated panels after 350 hours of salt spray test En ligne : https://drive.google.com/file/d/1mWEEPsgKAs7RQgi3rIxpy7dCyWmc-YoP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24150 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Refractive indices / Mukund Hulyalkar in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 102-104 Titre : Refractive indices Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2015 Article en page(s) : p. 102-104 Langues : Anglais (eng) Catégories : Opacifiants Réfraction, Indice de Revêtements:Peinture Index. décimale : 667.6 Peintures Résumé : In this issue we have given the refractive indices at a glance. It plays a very important role with respect to opacity/covering of paint. Underlined materials are related to paint industry. En ligne : https://drive.google.com/file/d/1799IXcCbehiMJUki0iH6aedEIC_VZtJx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24151 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Additives - Defoamers in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 110-112 Titre : Additives - Defoamers Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 110-112 Langues : Anglais (eng) Catégories : Antimousse Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits En ligne : https://drive.google.com/file/d/1rFsQKczqfgpzQk_htyt0eHzqKHBnGhrr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24152 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Corrosion and protection of bridges (Part 2) / P. K. Kamani in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 117-123 Titre : Corrosion and protection of bridges (Part 2) Type de document : texte imprimé Auteurs : P. K. Kamani, Auteur Année de publication : 2015 Article en page(s) : p. 117-123 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Haut extrait sec Métallisation Métaux -- Revêtements protecteurs Ponts métalliques -- Revêtements protecteurs Revêtements:Peinture Surfaces -- Nettoyage Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Painting on bridges has multifarious role : decoration, protection and functional. There have been lots of development in every sphere of painting system : surface preparation, primer to top coat, pain application equipments, etc. Environment, painting cost and performance of die coatings are the basic reasons behind the development of newer technology. New paint systems have been developed to meet low VOC requirement and facilitate painting comprise fewer layers compared to old paint systems having several layer of paints with high VOC. Present paint systems for bridges enable vert' long repair intervals. Painting conditions in workshops have improved considerably in the fast few years, and the risk of moisture condensing on the surface of steel before painting has been eliminated completely. Note de contenu : - SURFACE PREPARATION - INITIAL CONDITION OF SURFACE : Flame cleaning - Chemical cleaning or chemical treatment - ALKALY CLEANING - SOLVENT CLEANING - REMOVAL OF SOLUBLE IRON CORROSION PRODUCTS - WET ABRASIVE BLAST CLEANING - ULTRA-HIGH PRESSURE WATER JETTING - METALLIZING - OVERCOATING - PAINT APPLICATION - THE INFLUENCE OF DESIGN ON CORROSION : Newer technology - Moder high-solids coatings En ligne : https://drive.google.com/file/d/1O6KLbv4EQwmAErJWrECRspcfM6A2Vyfs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24153 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Formulation corner / Mukund Hulyalkar in PAINTINDIA, Vol. LXV, N° 3 (03/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 106 Titre : Formulation corner Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2015 Article en page(s) : p. 106 Langues : Anglais (eng) Catégories : Etudes comparatives Revêtements protecteurs Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : In this series of protective industrial coatings I am herewith giving properties of the various paint systems. It will help to compare the strength and weakness of each system so that suitability for end use can be decided. En ligne : https://drive.google.com/file/d/1twzF6nIXgum2keoMJJh-8hG_unvXYXiw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40237 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17240	-	Périodique	Bibliothèque principale	Documentaires	Disponible