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Additives for environmentally friendly protective coatings / John W. Du in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4552 (09/2010)
[article]
Titre : Additives for environmentally friendly protective coatings Type de document : texte imprimé Auteurs : John W. Du, Auteur Année de publication : 2010 Article en page(s) : p. 18-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Antimousse
Floculation
Mouillage (chimie des surfaces)
Pigments
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
SiliconesLes 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).
SurfactantsIndex. décimale : 667.9 Revêtements et enduits Résumé : The chemical structure of additives and their performance as surfactants, defoamers and dispersants. Part one : Wetting and dispersing additives and silicone and surface flow control agents. En ligne : https://drive.google.com/file/d/1U27d61USpwsv19icn6Crjb6dpsyPA55o/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10009
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Code-barres Cote Support Localisation Section Disponibilité 012483 - Périodique Bibliothèque principale Documentaires Disponible Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
[article]
Titre : Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach Type de document : texte imprimé Année de publication : 2002 Article en page(s) : p. 96-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Caractérisation
Charbon actif
Chaussures -- Industrie -- Aspect de l'environnement
Coagulation
Cuirs et peaux
Déchets industriels -- Elimination
Eaux usées -- Epuration
Eaux usées -- Recyclage
FloculationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The footwear industry generates small volumes of non-biodegradable liquid effluents from finishing operations which have a high organic load, mainly due to pigments, organic acids and organic solvents. In consequence, these effluents must be treated to accomplish regulatory requirements before discharge. One of the treatment alternatives is coagulation/flocculation, a well-known treatment for removing fine particles and colloids. Tests carried out using lime, aluminum sulphate, ferric chloride and ferric sulphate as coagulants gave chemical oxygen demand (COD) and 5-day biochemica1 oxygen demand (BOD5) removals over 80-90 %. However, despite this efficiency, some of the effluent characteristics are still higher than those imposed for discharge to surface waters, land or sewage systems. A polishing step using activated carbon adsorption is then required to permit the discharge to sewage systems, but the quantities of adsorbent required casts some doubt on the feasibility of the process. Note de contenu : - Characterisation of the effluents
- Coagulation/flocculation
- Activated carbon adsorption
- Table 1 : Characteristics of the effluents according to their residence time at the finishing system-
- Table 2 : Characteristics of the one-week-old sample B of effluent
- Table 3 : Jar tests with effluent sample B
- Table 4 : Selected conditions for coagulation/flocculation of A, B and C effluent samples
- Table 5 : Results of coagulation/flocculation on effluent A
- Table 6 : Results of coagulation/flocculation on effluent B
- Table 7 : Results of coagulation/flocculation on effluent C
- Table 8 : FeCl3 dose optimisation
- Table 9 : Results of coagulation/flocculation on effluent D
- Table 10 : Activated carbon treatment resultsEn ligne : https://drive.google.com/file/d/1_YusTO_2yqec69S27ZP60VA4rVk38bcV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39922
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 96-100[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Applied rheology and architectural coating performance / Richard R. Eley in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
[article]
Titre : Applied rheology and architectural coating performance Type de document : texte imprimé Auteurs : Richard R. Eley, Auteur Année de publication : 2019 Article en page(s) : p. 263-305 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cisaillement (mécanique)
Floculation
Latex
Microstructures
Particules (matières)
Revêtements en bâtiment:Peinture en bâtiment
Rhéologie
SédimentationIndex. décimale : 667.9 Revêtements et enduits Résumé : Paint rheology is understood to play a vital role in both product performance and customer acceptance. Consequently, the ability to formulate paints having the necessary flow properties is essential for paint technologists. Experienced formulators have said that as much as half the cost of new product development can be consumed in getting the rheology right. In fact, the quality-control viscosity measurement devices in everyday use in the development laboratory are of little help in this endeavor. Among other shortcomings, most such instruments apply shear stresses which are far from those involved in important coating flow processes. The rheological properties required for a successful coating must be defined with due regard to the prevailing conditions of stress involved in application and film formation. This requires that measurements should be taken over a wide range of shear stress and timescales. The task for the applied rheologist is to bridge rheology and technology, but it is often unclear how to connect rheological data with the “real-world” performance of paints, due to the complexity of coating flows. This review in part discusses the use of controlled-stress rheometry to characterize coatings, and presents ways of applying the results effectively to the analysis of paint flow. The methodology is fundamental but not unduly time-consuming, since the objective is to provide sound yet timely guidance to formulators. Thirteen commercial semigloss latex paints were analyzed rheologically to develop correlations to paint performance. Using the method of shear stress mapping, key regions of the non-equilibrium flow curve are identified for the control of paint flow processes. With this approach, simple but strong correlations were obtained of paint flow metrics to viscosity chosen at the relevant stresses. The fact of high correlation means one can expect that an appropriate viscosity adjustment will correspondingly improve performance. It is argued that shear stress, not shear rate, is the correct independent variable both for experimentation and for the graphical presentation and analysis of viscosity data. The yield stress parameter, particle flocculation, and sedimentation are also discussed, and an oscillatory shear method of direct measurement of yield stress is described. Note de contenu : - BASIC RHEOLOGY TERMS AND DEFINITIONS
- RHEOLOGY AND COATING FLOWS : Correlations of rheology to performance - Shear rate or shear stress ? - Shear rate or shear stress : experimental aspects - Equilibrium flow methods - Step-shear thixotropic recovery method - The non-equilibrium flow curve - Graphical representation of flow curves - Shear stress mapping - Leveling - Sagging (drainage flow) - Rheology and initial film geometry - Hydrodynamics of brush and roller application -
- YIELD STRESS : Yield stress measurement - Yield stress and coating flows - Yield stress and particle settlingDOI : 10.1007/s11998-019-00187-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00187-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32405
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Code-barres Cote Support Localisation Section Disponibilité 20894 - Périodique Bibliothèque principale Documentaires Disponible Associative polymer/particle dispersion phase diagrams III : Pigments / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 3 (07/2006)
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Titre : Associative polymer/particle dispersion phase diagrams III : Pigments Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2006 Article en page(s) : p. 165-171 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie)
Brillance (optique)
Diagrammes de phases
Dioxyde de titane
Epaississants
Floculation
Hydrophobie
Latex
Polyacide méthacrylique
Polyacrylate d'éthyle
Polyéthers
Polyéthylène glycol
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
ThermodynamiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The colloidal interactions of both HEUR and HASE associative polymers with pigments in the presence of dispersant are complicated and subject to a number of variables. The objective of this work was to clarify the conditions needed to achieve good pigment dispersion in associative thickener systems by characterizing particle dispersion behavior. This had previously been done for latex particles, but not for pigments such as TiO2. Good dispersion leads to optical properties, such as gloss and hiding, that are superior to nonassociative thickener systems. Pigment dispersion phase diagrams represent a good way to visualize the complex interactions among pigments, dispersant, and thickener. The two most important variables were found to be pigment type (i.e., surface composition) and dispersant composition. Associative thickeners can yield good pigment dispersion or flocculation, depending on the correct matching of dispersants and pigment type. Because of the hydrophobic functional groups governing associative thickener behavior, dispersants having some hydrophobic character yielded the best pigment dispersions and optical properties because they could couple the pigment particles with the associative thickener network. Interior-grade TiO2 tended to yield better dispersions and optical properties than exterior-grade TiO2. Optimized associative thickener systems generally had improved optical properties over comparable nonassociative systems. Optical properties correlated well with particle dispersion behavior as displayed by the dispersion phase diagrams. DOI : 10.1007/BF02774506 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02774506.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3689
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Code-barres Cote Support Localisation Section Disponibilité 005076 - Périodique Bibliothèque principale Documentaires Disponible Capture of overspray powder paint in a wet booth system / Sheila F. Kia in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)
[article]
Titre : Capture of overspray powder paint in a wet booth system Type de document : texte imprimé Auteurs : Sheila F. Kia, Auteur ; Devi N. Rai, Auteur ; Joe C. Simmer, Auteur ; Clifford Wilson, Auteur Année de publication : 1997 Article en page(s) : p. 23-31 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents mouillants
Ateliers de peinture industrielle
DéplétionEn physico-chimie, la déplétion est à l'origine de l'interaction attractive entre grosses particules en présence de plus petites. Décrite pour la première fois théoriquement par Azakura et Oosawa2, ce phénomène contrôle la stabilité de nombreuses solutions colloïdales. En effet, des particules solides ne peuvent s'interpénétrer, il peut en résulter les effets de volume exclu entre les grosses particules, cette force effective est induite par la présence des petites. Cette force de déplétion est une force attractive à très courte distance (de l'ordre de la taille des petites particules) entre deux grosses particules, créée par l'absence statistique des petites dans cette zone. Une expression analytique de cette force existe pour le mélange binaire de sphères dures (modèle de Asakura et Oosawa).
Floculation
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Polyéthylène glycol
Polyoxypropylène glycol
Récupération (Déchets, etc.)
Revêtements
Revêtements poudre:Peinture poudre
SurfactantsIndex. décimale : 667.9 Revêtements et enduits Résumé : A chemical treatment is developed to enable capture of powder paint in a wet booth system. The treatment paves the way for use of conventional wet booth systems in small or short-term powder paint applications where capital investment for dry powder booths is unfavorable. It is found that the powder paint collection in a wet booth is possible only in the presence of a suitable wetting agent in the boothwater. The selected wetting agent is polyoxyethylene-polyoxypropylene glycol, which is a low-foaming, nonionic, surface active agent, and found to have little interference with the detackifying and flocculating functions of a melamine-based chemical treatment program. Note de contenu : - INTRODUCTION : Wetting principles - Selected wetting agent
- EXPERIMENTAL : Laboratory analysis
- RESULTS AND DISCUSSION : Wetting agent effects - Wetting agent depletion rate - Treatment performance - Treatment chemicals usagePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18066
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Code-barres Cote Support Localisation Section Disponibilité 003544 - Périodique Bibliothèque principale Documentaires Disponible PermalinkCoagulation et floculants organiques de synthèse / Ciba (1996)
PermalinkCoagulation - Floculation / Ciba (1995)
PermalinkComment diminuer la viscosité de suspensions concentrées de particules de ciment ? / J. Hot in RHEOLOGIE, Vol. 24 (12/2013)
PermalinkControlling particle dispersion in latex paints containing associative thickeners / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
PermalinkDirect observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM / Cheng-Le Zhao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 2 (04/2006)
PermalinkDispersing technology / Manoj Sathyan in PAINTINDIA, Vol. LVIII, N° 1 (01/2008)
PermalinkPermalinkEffect of pigment particle size in coating application / Sanket Shinde in PAINTINDIA, Vol. LXIX, N° 12 (12/2019)
PermalinkEffects of latex and thickener polarities on rheology and phase stability of latex-HEUR mixtures / Travis B. Smith in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
PermalinkEnhanced clarification of tannery wastewater / Bruce. M. Poole in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
PermalinkEtude de l'adsorption de polyacrylates de sodium sur le carbonate de calcium. Application à la stabilisation des suspensions aqueuses de minéraux / Jacques Persello / 1983
PermalinkEtude et modélisation du comportement rhéologique en fluage de suspensions aqueuses floculées de Kaolin au seuil d'écoulement / D. Léger in LES CAHIERS DE RHEOLOGIE, Vol. XV, N° 3 (05/1998)
PermalinkExploring the mechanisms of the interaction between a specific bioflocculant and tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
PermalinkFlocculation behaviors of collagen protein-Al(III) composite flocculant / Ruiqin Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 2 (02/2014)
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