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JOURNAL OF COATINGS TECHNOLOGY (JCT) . Vol. 69, N° 867Rheological changes during the drying of a waterborne latex coatingMention de date : 04/1997 Paru le : 01/04/1997 |
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Ajouter le résultat dans votre panierA introduction to organic pigment / Peter Lewis in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
[article]
Titre : A introduction to organic pigment Type de document : texte imprimé Auteurs : Peter Lewis, Auteur Année de publication : 1997 Article en page(s) : p. 29-32 Langues : Américain (ame) Catégories : Pigments organiques Index. décimale : 667.9 Revêtements et enduits Résumé : As to future trends within the pigment industry as they relate to the coatings industry, I see research contuining ton concentrate on providing the coatings industry with pigments that offer "value in use" by being more easy to disperse, more durable, more economical, faster wetting, more compatible with the common vehicle/solvent systems, and that are environmentally acceptable. The pressure on our environment are not likely to decrease as more and more pigments, both organic and inorganic, are withdrawn from use due to concerns over their effect on the environment.
On the other side, I see the coatings industry continuing to place stricter demands on the pigmen manufacturer regarding improved quality control and product consistency, an increased requirement for economical high performance pigments to satisfy the demands of the ever-changing automotive industry as basecoat/clearcoat systems become more widespread.
Nothing is more sure than change itself but this change must be a change for the better or a change to meet a real need, not just change for the saki of change.Note de contenu : - International nomenclature the CI system
- Pigment selection
- Physical formsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18110
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 29-32[article]Réservation
Réserver ce documentRheological changes during the drying of a waterborne latex coating / Frank Loffläth in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
[article]
Titre : Rheological changes during the drying of a waterborne latex coating Type de document : texte imprimé Auteurs : Frank Loffläth, Auteur ; Matthew Gebhard, Auteur Année de publication : 1997 Article en page(s) : p. 55-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Evaporation
Latex
Revêtement -- Séchage:Peinture -- Séchage
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Increases in the low shear viscosity occurring during drying of a water-based latex film were examined as a function of pH, cosolvents, and base. The water and cosolvent evaporation rates were determined as a function of temperature and humidity. Water was found to evaporate with an activity coefficient of 1 and a ΔHv equivalent to pure water. The viscosity changes were determined from a creep measurement. The data is explained by the volume packing model of De Kruif. For several of the films, the ratio between volume and weight fraction was not a static parameter, and an abnormally large drop in the effective volume and weight fraction was observed. This was exaggerated for the samples with ethylene glycol monobutyl ether (EB) or NH4OH. The high volatility of EB explains the former, while the latter result indicates that NH4OH suppresses viscosity during drying. Note de contenu : - THEORETICAL BACKGROUND : Evaporation process - Viscosity and volume fraction - Combination of evaporation and volume-fraction/ viscosity equations
- EXPERIMENTAL DATA : Raw material and sample preparation - Evaporation measurements - Viscosity increase during evaporation - Intrinsic viscosity - Determination of open time
- RESULT AND ANALYSIS : Evaporation rates - Intrinsic viscosity - Viscosity increase during drying - Physical changes in the sample upon drying - Correlation between drying curve data and open timePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18111
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 55-66[article]Réservation
Réserver ce documentSynthesis and characterization of Copoly(MMA-MA)-Cu complex and study on its leaching behavior / A. B. Samui in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
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Titre : Synthesis and characterization of Copoly(MMA-MA)-Cu complex and study on its leaching behavior Type de document : texte imprimé Auteurs : A. B. Samui, Auteur ; V. R. Hande, Auteur ; P. C. Deb, Auteur Année de publication : 1997 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Caractérisation
Complexes métalliques
Cuivre
Formulation (Génie chimique)
Lixiviation
Méthacrylique, AcideL'histoire de l'acide méthacrylique commence en 1865, année où il est synthétisé pour la première fois à partir du méthacrylate d'éthyle.
L'acide méthacrylique est très réactif avec les groupes carboxyles, vinyles et esters.
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Revêtements antisalissures:Peinture antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : The most effective commercially available antifouling paint system is based on organotin, which is chemically attached to a long chain polymeric binder. Environmental studies have revealed that the proportion of organotin in sea water near the shores has reached an alarming level. Therefore, attempts are being made in many directions to eliminate tin from antifouling paint systems. Design of a highly toxic copper based paint system is one of the latest areas of research. In the present work, a copper complex based on carboxyl containing polymer has been synthesized. Paints were formulated using the complexes as pigment. Critical pigment volume concentration is found to be around 35%. Both accelerated and normal leaching behavior were studied. The release if copper from complex is slower and steadier compared to that from cuprous oxide. The later part of leaching is very close to steady-state behavior. Note de contenu : - EXPERIMENTAL : Materials - Methods - Characterization - Estimation of copper
- RESULT AND DISCUSSION : Composition - Infrared spectra - Mechanical properties of paint films - Tensile strength - Adhesive strength - Accelerated leaching - Leaching in sea waterPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18231
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 67-72[article]Réservation
Réserver ce documentUnifying model for understanding HEUR associative thickener influences on waterborne coatings : I. HEUR interactions with a small particle latex / Mao Chen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
[article]
Titre : Unifying model for understanding HEUR associative thickener influences on waterborne coatings : I. HEUR interactions with a small particle latex Type de document : texte imprimé Auteurs : Mao Chen, Auteur ; Wyllie H. Wetzel, Auteur ; Zeying Ma, Auteur ; J. Edward Glass, Auteur ; Robert J. Buchacek, Auteur ; John G. Dickinson, Auteur Année de publication : 1997 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption
Epaississants
Hydrophobie
Polyéther uréthane
Revêtements -- Additifs:Peinture -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : The structural features of associative thickeners influence their viscosifying properties in neat and surfactant containing aqueous solutions and in architectural coating formulations. Our understanding of the phenomena based on model associative thickener of the Hydrophobically modified Ethoxylate URethane (HEUR) type are presented. These studies provide general concepts in aqueous solutions, but they do not provide a quantitative model for understanding the influence of associative thickeners in coating formulations. To provide a more quantitative description, the interactions of associative thickeners with the film forming latex are considered in this study. This requires a knowledge of the free surfactant concentration in the formulation that depends on the residual amount present in the latex and the amounts added with the pigment grind, colorant, etc. The competitive interaction of the surfactants and associative thickener types for the surface of both disperse phases is a key variable. These interactions with the latex will be discussed in this article in an effort to define an encompassing model for understanding how HEUR associative thickeners influence waterborne coatings. Note de contenu : - Adsorption on small particles latexes
- Rheology of thickened dispersionsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18232
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 73-80[article]Réservation
Réserver ce documentSelf-opacifying aluminum phosphate particles for paint film pigmentation / Marisa Masumi Beppu in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
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Titre : Self-opacifying aluminum phosphate particles for paint film pigmentation Type de document : texte imprimé Auteurs : Marisa Masumi Beppu, Auteur ; de Oliveira Lima Emilia Celma, Auteur ; Renato Massami Sassaki, Auteur ; Fernando Galembeck Année de publication : 1997 Article en page(s) : p. 81-88 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Opacifiants
Phosphate d'aluminiumLe phosphate d'ammonium est un composé chimique de formule (NH4)3PO4. Il s'agit d'un sel d'ammoniac NH3 et d'acide phosphorique H3PO4, constitué de cations ammonium NH4+ et d'anions phosphate PO43–. Il se forme à l'état de poudre cristalline lorsqu'on mélange deux solutions concentrées d'ammoniac et d'acide phosphorique : 3 NH3 + H3PO4 → (NH4)3PO4.
Il est soluble dans l'eau, et la solution aqueuse de phosphate d'ammonium libère de l'ammoniac lorsqu'on la chauffe.
Les autres sels d'ammoniac et d'acide phosphorique existent également : phosphate de diammonium (NH4)2HPO4 et phosphate de monoammonium NH4H2PO4. Ils peuvent être convertis l'un en l'autre avec le phosphate d'ammonium en ajoutant davantage d'ammoniac ou d'acide phosphorique selon les besoins.
Le phosphate d'ammonium est utilisé dans certains engrais comme source d'azote. Il est également employé comme retardateur de flamme dans la composition des thermoplastiques.
Pigments inorganiques
Polyacétate de vinyle
Polyacryliques
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Opaque particles of aluminium phosphate can be obtained in two years : self-opacification within drying latex films and thermal treatment at 500-700°C (which was previously described). Self-opacification is easily achievied and allows for extensive replacement of tiO2 as a white pigment, with a gain (in a acrylic latex) in the optical properties of the pigmented film. Note de contenu : - Self-opacification of films containing aluminium phosphate particles
- Particles self-opacification and emulsion aging
- Particle morphologyPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18233
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 81-88[article]Réservation
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