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Measurement by scanning force microscopy of the scratch and mar resistance of surface coatings / W. Shen in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 6 (06/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 6 (06/1996) . - p. 253-256 Titre : Measurement by scanning force microscopy of the scratch and mar resistance of surface coatings Type de document : texte imprimé Auteurs : W. Shen, Auteur ; C. Ji, Auteur ; F. Jones, Auteur ; M. P. Everson, Auteur ; A. Ryntz, Auteur Année de publication : 1996 Article en page(s) : p. 253-256 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture  'Matériau  revêtement'  'Propriété  mécanique'  Feuil  'Résistance  rayure'  'Etude  expérimentale'  'Microscopie  force  balayage' Index. décimale : 667.9 Revêtements et enduits Résumé : Scratch and mar resistance are a very desirble characteristic of coatings. Conventional hardness does not provide relevant data about them. The scanning force microscope has been used to carry out a micro-scratch test. This direct measurement provides a reliable comparison of scratch resistance for samples measured under the same condition. To characterize the scratch and mar resistance, a micro-scratch resistance test may be introduced for coatings. It is defined as the force applied normal to the surface divided by the cross section area of the scratch. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17048 [article]

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Development of electron beam curable coatings for prepainted strip / G. M. Miasik in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 6 (06/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 6 (06/1996) . - p. 258-267 Titre : Development of electron beam curable coatings for prepainted strip Type de document : texte imprimé Auteurs : G. M. Miasik, Auteur Année de publication : 1996 Article en page(s) : p. 258-267 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  radiodurcissable'  Durcissement  'Irradiation  électron'  'Coil  coating'  'Acrylate  polymère'  Formulation  'Résistance  intempérie'  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : There has been considerable growth in the production of prepainted steel over the past decade. This has been due to the increased usage of prepainted steel products in the construction and domestic appliance industries and a recognition by the automotive manufacturing industry of the benefits of prepainted steels, such as Durasteel and Bonazinc. The coil coating industry is, however, under increasing pressure from environmentalists who question the manufacture, content and recyclability of prepainted steel. The major areas of concern are the levels of solvents used in current coil coating paints, the continued use of chromates in pretreatments and primers and the recyclability of halogen-containing (PVC, PVF2) prepainted steels. The European steel industry must respond positively to these environmental pressures if it wishes to maintain and expand its coil coating operations. Radiation curing has a large potential as a future processing technology for the production of prepainted steel strip. This technology is currently widely used throughout the plastic, paper and wood-coating industries where it shows a number of environmental advantages over conventional thermal curing. Note de contenu : - PRINCIPLES OF RADIATION CURING - CURING MECHANISMS - THE CHEMISTRY OF RADIATION CURING : acrylate systems - oligomeric (resinous) reactive material - diluents - non-reactive diluents - reactive diluents - adhesion promoters - EXPERIMENTAL PROGRAMME : raw materials - electron beam curing unit (EBCU) - coating development - addition of pigmentation - DETERMINATION OF DEGREE OF CURE OF COATING BY FTIR : unpigmented coating - pigmented coating - investigation of heat aging phenomenon - adhesion of EB curable coating to thermally cured topcoats - corrosion testing - ACCELERATED WEATHERING OF COATING : non-topcoated samples - topcoated panels - EXTERIOR WEATHERING OF COATING : non-topcoated panels - polyester topcoated panels - EFFECT OF PROCESS VARIATION ON PERFORMANCE OF COATING : FTIR estimation of cure - MODIFICATION OF COATING : reduction of gloss by the addition of matting agents - addition of plasticers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17049 [article]

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Intermolecular forces in coatings / James Thomas Guthrie in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 6 (06/1996)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 79, N° 6 (06/1996) . - p. 268-273 Titre : Intermolecular forces in coatings Type de document : texte imprimé Auteurs : James Thomas Guthrie, Auteur Année de publication : 1996 Article en page(s) : p. 268-273 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture  'Matériau  revêtement'  'Interaction  intermoléculaire'  Dipôle  'Liaison  hydrogène'  'Propriété  physique'  Fusion  'Température  transition  vitreuse'  'Masse  moléculaire'  Plastifiant  transition' Index. décimale : 667.9 Revêtements et enduits Résumé : The physical properties of coatings formulations in the liquid state and the solid state directly arise from interactions which exist between the various components of the formulations. In such systems we can envisage, for the liquid state, the solvent, the resin precursor, the film former, the pigment(s), extenders and any/all additives. In the solid state the solvent is removed. The interplay between the remaining species changes. The solvent provides the basis for mobility, opportunities for change and the possibility of closer approaches to homogeneity within the system (or, in certain instances, greater heterogeneity within the system). Note de contenu : - INTRODUCTION : london forces - dipole-dipole forces - interaction forces-polarisability - hydrogen bonding - INTRAMOLECULAR FORCES AND PHYSICAL PROPERTIES : volatility - MELTING FEATURES : the glass transition temperature - factors influencing the glass transition temperature - molar mass effects - chain branching effects - chain across linkage - plasticisers - copolymerisation - measurement of transition temperatures Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17050 [article]

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