Dépouillements

Measuring adhesion to poly(olefins) / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 921 (10/2001) . - p. 107-115 Titre : Measuring adhesion to poly(olefins) : The role of adhesion promoter and substrate Type de document : texte imprimé Auteurs : Rose Ann Ryntz, Auteur ; Russ Pierce, Auteur ; Dennis M. Mihora, Auteur ; Dottie Britz, Auteur Année de publication : 2001 Article en page(s) : p. 107-115 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau  revêtement'  Peinture  Adhérence  Thermoplastique  Polyoléfine  'Industrie  automobile'  'Matière  plastique'  'Méthode  mesure'  Adjuvant Index. décimale : 667.9 Revêtements et enduits Résumé : The use of thermoplastic poly(olefins) in the automotive industry continues to proliferate due to their decreased cost and weight and increased recyclability in comparison to thermoplastics such as poly(carbonate) alloys or poly(urethanes). An attribute that continues to hamper the widespread introduction of thermoplastic poly(olefins), in particular thermoplastic olefin (TPO, a blend of impact copolymer and elastomer), into additional automotive components however is its poor surface wettability and adhesion. Adhesion promoter formulation, both in terms of resin composition and solvent variation, has been known to influence the adhesive propensity of topcoats when analyzed by typical tests such as peel strength. It has long been disputed, however, that peel strength is not a true measure of paint adhesion since it artificially introduces a film between the paint and the adhesion promoter to enable one to perform the test. In contrast, this paper discusses the use of a newly developed in-situ adhesion test, described as compressive shear delamination (CSD), to quantify the adhesive/cohesive propensity of coatings to a variety of TPO substrates. The effect of solvent type and chlorinated poly(olefin) (CPO) adhesion promoting resin on the adhesion/cohesion of topcoats to TPO is described. Chlorinated poly(olefin) type, followed by solvent variation, was shown to have the most significant impact on the adhesion/cohesion of topcoats. This newly described CSD protocol for determining the weak link in painted plastic may have a significant impact on the choice of topcoat, adhesion promoting primer formulation, and substrate in particular automotive applications. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5765 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001229	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Cycloaliphatic epoxide crosslinkable core-Shell latexes / Mark D. Soucek in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 921 (10/2001) . - p. 117-125 Titre : Cycloaliphatic epoxide crosslinkable core-Shell latexes : A new strategy for waterborne epoxide coatings Type de document : texte imprimé Auteurs : Mark D. Soucek, Auteur ; Ganghua Teng, Auteur ; Shoabing Wu, Auteur Année de publication : 2001 Article en page(s) : p. 117-125 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau  revêtement'  'Peinture  phase  aqueuse'  émulsion'  Formulation  Liant  'Résine  époxyde'  'Polymère  réticulé'  Latex  'Polyméthacrylate  méthyle'  'Polyacrylate  butyle'  hydroxyéthyle'  'Acide  méthacrylique'  Préparation  'Etude  expérimentale'  'Particule  core  shell' Index. décimale : 667.9 Revêtements et enduits Résumé : New core-shell acrylic latexes designed for crosslinking with cycloaliphatic diepoxides were prepared. The core consisted of methyl methacrylate (MMA), butyl acrylate (BA), 2-hydroxyethyl methacrylate (HEMA), and the shell MMA, BA, and methacrylic acid (MAA). A strong acid acrylate was incorporated into the shell to catalyze the crosslinking reactions. The diepoxide crosslinker was introduced into the latex formulation via three methods: (1) added with the monomers during the polymerization of the latex, (2) added after the preparation of the latex in an organic solvent, and (3) added as a separate emulsion. The stability of epoxide was shown to be dependent on latex morphology, initiator system, and reaction conditions. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5766 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001229	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Sheet coating by drawdown of extruded polymer / Fan Ding in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 921 (10/2001) . - p. 127-134 Titre : Sheet coating by drawdown of extruded polymer Type de document : texte imprimé Auteurs : Fan Ding, Auteur ; A. Jeffrey Giacomin, Auteur ; John C. Slattery, Auteur Année de publication : 2001 Article en page(s) : p. 127-134 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Procédé  revêtement'  Feuille  'Moulage  extrusion'  'Revêtement  Polymère  Etirage  Modélisation  'Fluide  newtonien'  'Angle  contact  dynamique' Index. décimale : 667.9 Revêtements et enduits Résumé : An approximate analytic solution for coating a highly viscous Newtonian fluid onto a substrate is developed (low Poiseuille number and high capillary number). Two particular extrusion angles are considered: parallel and perpendicular to the moving substrate. We obtain expressions for the curtain shape, coating thickness, contact length, contact pressure, drawing force, apparent contact angle, and contact convexity. In this paper, we identify a process indeterminacy that arises in the curtain coating employing a parallel slit. We show that, by orienting the extrusion slit perpendicular to the moving substrate, this indeterminacy vanishes. Thus, a unique solution for the contact length is always obtained. The extension to a viscoelastic fluid is also briefly considered. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5767 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001229	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Meeting the challenge of radical change / George R. Pilcher in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 921 (10/2001) . - p. 135-143 Titre : Meeting the challenge of radical change : coatings R&D as we enter the 21st century Type de document : texte imprimé Auteurs : George R. Pilcher, Auteur Année de publication : 2001 Article en page(s) : p. 135-143 Note générale : Bibliogr. Langues : Américain (ame) Tags : Industrie  peinture  vernis  Recherche  développement Index. décimale : 667.9 Revêtements et enduits Résumé : The coating industry has only occasionally been presented with the challenges and opportunities which either bring about, or proceed from, radical change—the advent of latex house paints, powder coatings and electrodeposition have been among the very few. Today, however, the coatings R&D community is blessed/cursed with a large variety of potential technology approaches, any of which—solid paint, solventless liquids, energy-curing systems, the use of nanotechnology or combinatorial chemistry, et al.—might lead to paradigm-shifting products and processes. It is easy to envision a future in which painted metal might replace asphalt shingles, clay tiles, and other common roofing materials widely used on residential roofing, and the automotive industry is clearly willing to explore coil-applied alternatives to its current painting practices. Taking advantage of the opportunities implicit in these new technologies, processes, and markets which are on the horizon will, however, require both new approaches to early performance prediction and also a renewed commitment to—and funding of—R&D within the global coatings community. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5768 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001229	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Pigment dispersion : I / Zeno W. Wicks in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 921 (10/2001) . - p. 145-149 Titre : Pigment dispersion : I Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; S. Peter Pappas, Auteur ; Frank N. Jones, Auteur Année de publication : 2001 Article en page(s) : p. 145-149 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dispersions et suspensions Floculation Mouillage (chimie des surfaces) Pigments -- Stabilité Revêtements Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Pigments are manufactured with the particle size distribution that gives the best compromise of properties, but the particles often become cemented together into aggregates during processing. Breaking these aggregates and forming stable dispersions of optimally sized pigment particles is a critical process in the manufacture of coatings. Making dispersions involves three aspects: (1) wetting, (2) separation, and (3) stabilization. Most authors agree that there are three aspects to dispersion but different terms are used, sometimes with conflicting meanings. Be careful reading papers to know how an author is using the terms. Because of effects of the high surface tension and polarity of water, consideration of pigment dispersion is separated in three sections. The first section (JCT, October 2001, page 145), dispersion in organic media, usually solutions of resins in organic solvent, was discussed. Dispersion in aqueous media is treated in the Formulation of Mill Bases section in this issue. The third section covers the use of Dispersion Equipment and Processes as well as the Evaluation of the Degree of Dispersion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5776 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001229	-	Périodique	Bibliothèque principale	Documentaires	Disponible