Amino resin cross-linked can coatings / Saminu Musa Magami in SURFACE COATINGS INTERNATIONAL, Vol. 95, 2 (04/2012)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 95, 2 (04/2012) . - p. 64-70 Titre : Amino resin cross-linked can coatings Type de document : texte imprimé Auteurs : Saminu Musa Magami, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2012 Article en page(s) : p. 64-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Can coating Chromatographie en phase liquide à hautes performances Polyamines Qualité -- Contrôle Réticulation (polymérisation) Revêtements -- Aspect de l'environnement Index. décimale : 667.9 Revêtements et enduits Résumé : In the surface coatings industries, major advances have been made through the use of amino-formaldehyde-based resin technologies. The term amino resin refers to a group of viscous, thermosetting amino-group-containing components that have use in curing with other resins to form a cross-linked network. They are widely used as cross-linking agents for hydroxyl, carboxyl and amide functional polymers. Note de contenu : - Melamine-based amino resins - Benzoguanamine-based amino resins and acetoguanamine-based amino resins - Urea-formaldehyde-based amino resin - Synthesis of melamine-based amino resins - CAN TECHNOLOGY : Three-piece cans - Two-piece cans - CAN COATINGS : Amino resins in can coatings - Substrates used in can coatings - TRANSFORMATION OF COATING FROM THE WET STATE TO THE DRY STATE BY CURING - OPTIONS FOR THE EVALUATION OF THE PROPERTIES OF CAN COATINGS : Physical tests (performance of the coating formulation and of the solid coating) - Chemical tests - MIGRATION PHENOMENA - REGULATIONS FOR CAN COATINGS - HEALTH, SAFETY AND ENVIRONMENTAL ISSUES En ligne : https://drive.google.com/file/d/1RuwYqhMLijKJGKI-VU44WXE0KYrl8F0R/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14423 [article]

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Functional can coatings - Part 1 : Underlying basic physical and chemical principles / Saminu Musa Magami in SURFACE COATINGS INTERNATIONAL, Vol. 96, 2 (04/2013)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 96, 2 (04/2013) . - p. 88-93 Titre : Functional can coatings - Part 1 : Underlying basic physical and chemical principles Type de document : texte imprimé Auteurs : Saminu Musa Magami Année de publication : 2013 Article en page(s) : p. 88-93 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion Can coating Matériaux -- Propriétés fonctionnelles Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings are used in the canning industry to serve as barriers between the metal can and the can contents, thus protecting the contents from attack by the metal and conversely protecting the metal from attack by the contents. After can manufacture, including application of coatings inside the cans, the contents are introduced into the cans. Sealing, cooking sterilisation and pasteurisation follow. Note de contenu : - AN OVERVIEW OF FUNCTIONAL COATINGS - DEFINING ADHESION, COHESION AND PROHESION : Cohesion and prohesion - Wetting and work of adhesion in coatings - ANALYTICAL TECHNIQUES - INTERNAL COATINGS FOR CANS - CHEMISTRY OF FUNCTIONAL COATINGS - CANNING APPLICATIONS : Alkyl-amino binders - Benzoguanamine-formaldehyde compositions - Amino-methylol compositions - Urea-formaldehyde binders - Epoxy binders - CHEMISTRY DURING APPLICATION En ligne : https://drive.google.com/file/d/1AGFJKlqHowyaXks-MuzMSgRCoy5OSS5o/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18388 [article]

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Functional can coatings - Part 2 : Composition, attributes, applications and performance / Saminu Musa Magami in SURFACE COATINGS INTERNATIONAL, Vol. 96, 3 (06/2013)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 96, 3 (06/2013) . - p. 148-155 Titre : Functional can coatings - Part 2 : Composition, attributes, applications and performance Type de document : texte imprimé Auteurs : Saminu Musa Magami, Auteur Année de publication : 2013 Article en page(s) : p. 148-155 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aliments -- Emballages -- Aspect sanitaire Analyse thermique Can coating Contamination chimique Etanchéité Evaluation Evaluation du risque Matériaux -- Propriétés fonctionnelles Index. décimale : 667.9 Revêtements et enduits Résumé : • Part 2 of this review of can coatings discüsses issues such as the functional requirements for different types of can coatings, formulation, test procedures and HSE-related matters. • Internal coatings for food applications in particular must satisfy a number of requirements in relation to impermeability and lack of both migration and reaction between coating components and food constituents. • Constituents of the coatings that are discussed include pigments (in particular Ti02), resins, solvents and additives. • Test procedures are considered in relation to the application properties of the coatings and their physical and chemical properties in the cured state. • Regulatory controls on the composition and properties of can coatings are considered in some detail, with a listing and brief description of the main regulations (both European and North American) that are applicable. Note de contenu : - CAN COATINGS : Requirements for internal coatings - THE AGEING AND STABILISATION OF CAN COATINGS - THE ROLES OF PIGMENTS IN CAN COATINGS : Resins and solvents - ADDITIVES FOR CAN COATING FORMULATIONS - TESTING AND PERFORMANCE ATTRIBUTES - PHYSICAL CHARACTERISATION - PHYSICAL CHEMICAL EVALUATIONS - THERMAL ANALYSIS PROCEDURES - HEALTH, SAFETY AND ENVIRONMENTAL ISSUES : REACH and safety issues in practice En ligne : https://drive.google.com/file/d/15H1FV8sJ0G1N9zzh3zzhsRsnrfavLN3W/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18717 [article]

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Monitoring the degree of curing in coatings using contact angle and surface reflectance measurements / Saminu Musa Magami in SURFACE COATINGS INTERNATIONAL, Vol. 97.5 (10/2014)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 97.5 (10/2014) . - p. 250-253 Titre : Monitoring the degree of curing in coatings using contact angle and surface reflectance measurements Type de document : texte imprimé Auteurs : Saminu Musa Magami, Auteur Année de publication : 2014 Article en page(s) : p. 250-253 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Dioxyde de titane Epoxydes Hautes températures Revêtement -- Séchage:Peinture -- Séchage Spectroscopie de réflectance Index. décimale : 667.9 Revêtements et enduits Résumé : Surface wetting and spectrophotometric reflectance are important properties that are commonly used in the characterisation of the products arising in the surface coating-related industries. In this study, these two techniques were used as simple methods of monitoring the curing behavior of coatings of interest to the packaging sector. The fluid coatings were cured at different temperatures (160, 180, 200, 220, and 240°C) for 10 minutes. In an extended study, the curing of the coatings was also carried out at 200°C for different time periods (5, 10 and 15 minutes, respectively). The results show that the techniques that were developed can be used as quality control procedures to monitor the extent to which the coatings are cured. Clear correlations were noted between instrumental measurements and visual assessments of the coatings. These techniques can be used to establish the consequences of employing variations in the curing conditions of the coatings because they lead to variation in molecular weight, structure development, film formation, cross-linking and interlocking in the coatings, as a consequence of increasing either the curing time or the curing temperature. Note de contenu : - MATERIALS AND METHODS : Materials - Coatings application and curing - Contact angle measurement and reflectance spectrophotometry - RESULTS AND DISCUSSION : Wetting characteristics- Visual region assessment - Surface spectrophotometric measurements En ligne : https://drive.google.com/file/d/13rCJZpFw7qbNeCU3F-A064rHr4pPEtTh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22162 [article]

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The effect of TiO2, pigmentation on the hydrolysis of amino resin crosslinked epoxy can coatings / Saminu Musa Magami in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 1013-1022 Titre : The effect of TiO2, pigmentation on the hydrolysis of amino resin crosslinked epoxy can coatings Type de document : texte imprimé Auteurs : Saminu Musa Magami, Auteur ; Peter K. T. Oldring, Auteur ; Laurence Castle, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2014 Article en page(s) : p. 1013-1022 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides Can coating Dioxyde de titane Epoxydes Hydrolyse Mélamine La 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. Réticulants Index. décimale : 667.9 Revêtements et enduits Résumé : Pigmented (TiO2), amino resin crosslinked coatings, designed for applications in can coatings’ internal lacquers, were formulated, characterized, applied, and cured. Three grades of a pigmentary form of TiO2 were characterized in terms of their particle size, their particle morphology, their zeta potential, and their moisture retention behavior. Epoxy coatings that were crosslinked using one of several, different amino crosslinkers were prepared. The effect of the presence of the TiO2 pigments on the hydrolysis of the cured coatings was monitored via the controlled retorting of the coatings. The different grades of TiO2 pigment were selected, to establish whether or not they could be used interchangeably with respect to hydrolysis and to melamine release. Also, the effects of the aging of the fluid coatings on the amount of melamine released from the coatings (after curing and retorting) were monitored. Storage under laboratory conditions for 2, 20, and 40 weeks was used for this purpose. The TiO2 pigment contributed significantly to the hydrolysis behavior of the epoxy coatings in that their presence substantially reduced the amount of melamine released and the extent of crosslinker hydrolysis. Typical results show that excluding the TiO2 pigment particles from the formulation results in there being 50% more hydrolysis of the crosslinker to melamine. With respect to the melamine release and crosslinker hydrolysis, the different grades of the pigment gave similar results. Note de contenu : - MATERIALS : Analysis of TiO2 - Preparation of the "model" epoxy-anhydride coatings - Coating application and curing - Surface microscopy of coatings and contact angle studies : epoxy-anhydride coatings - Retort of coatings/hydrolysis tests : epoxy-anhydride coatings - Determination of the melamine released by the epoxy-anhydride coatings - RESULTS AND DISCUSSION : Behavior of the TiO2 pigment species - Effect of pigmentary TiO2 on the hydrolysis of cured epoxy-anhydride coatings to melamine DOI : 10.1007/s11998-014-9610-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9610-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22357 [article]

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