Mixed powder coating film using thermoplastic polyester and its alkaline resistance / Yukitoshi Takeshit in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 503-514 Titre : Mixed powder coating film using thermoplastic polyester and its alkaline resistance Type de document : texte imprimé Auteurs : Yukitoshi Takeshit, Auteur ; Takuya Kamisho, Auteur ; Seizo Sakata, Auteur ; Takashi Sawada, Auteur ; Yoshikazu Watanuki, Auteur ; Ryuichi Nishio, Auteur ; Toshinobu Ueda, Auteur Année de publication : 2013 Article en page(s) : p. 503-514 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bases (chimie) Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polyesters Polyéthylène téréphtalate Polyvinyle butyrale Résistance chimique Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : To improve alkaline resistance, a newly mixed powder coating film using thermoplastic polyethylene terephthalate (PET) was investigated. Two kinds of polyvinyl butyral (PVB) and two kinds of polyamide (PA) were chosen as the secondary polymer. The melting temperatures (T ms) of these materials were lower than that of primary PET polymer so the mixed powder coating was able to form a dual phase film through a fluidized bed coating process. Microscope and Fourier transform infrared spectroscopy (FTIR) observations revealed that the dual phase structure was indeed successfully formed and there was a secondary layer over the entire surface area of the film. This mixed powder coating film significantly enhanced the alkaline resistance to an environment filled with NaOH solution at 40°C in which a secondary material would be effective in protecting the film. With regard to both alkaline resistance and film formability, PET/PVB was superior to the PET/PA mixture. Note de contenu : - EXPERIMENTAL : Materials - Preparation of mixed powder coating film - Evaluation - RESULTS AND DISCUSSION : Combination of PET/PVB-1 - Combination of PET/PVB-2 - Combination of PET/PA-1 - Combination of PET/PA-2 DOI : 10.1007/s11998-013-9473-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9473-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19100 [article]

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Water absorption of water-based anticorrosive coatings and its effect on mechanical property and adhesive performance / Takuya Kamisho ; Yukitoshi Takeshita ; Seizo Sakata ; Takashi Sawada in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 2 (03/2014) . - p. 199-205 Titre : Water absorption of water-based anticorrosive coatings and its effect on mechanical property and adhesive performance Type de document : texte imprimé Auteurs : Takuya Kamisho, Auteur ; Yukitoshi Takeshita, Auteur ; Seizo Sakata, Auteur ; Takashi Sawada, Auteur Année de publication : 2014 Article en page(s) : p. 199-205 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Analyse mécanique dynamique Anticorrosifs Essais accélérés (technologie) Humidité -- Absorption:Eau -- Absorption Revêtements en phase aqueuse:Peinture en phase aqueuse Viscoélasticité Index. décimale : 667.9 Revêtements et enduits Résumé : We focused on the water absorption of newly developed water-based anticorrosive coatings, which contain low volatile organic compounds. We investigated (1) the water absorption behavior of the coatings, (2) the effect of water absorption on the mechanical property of the coatings, and (3) the relationship between the water-absorbing properties and adhesive performance under accelerated aging conditions. It was found that the water absorption of the coatings indicated Fickian diffusion, and the saturated water content M ∞ and diffusion coefficient D of the coatings were quantitatively determined. The storage modulus E′ of the coatings decreased due to water absorption. However, in the coating that exhibited higher crosslink density, the effect of water absorption on the decrease in E′ was relatively small in spite of its higher M ∞ . The lower M ∞ and higher D coating resulted in better adhesive performance than the higher M ∞ and lower D coating. Thus, M ∞ value affected adhesive performance under accelerated aging conditions much more than D value. Note de contenu : - EXPERIMENTAL : Sample preparation - Water absorption test - Dynamic mechanical analysis - Accelerated aging test - Pull-of test - RESULTS AND DISCUSSION : Water absorption behavior - Effect of water absorption on mechanical property - Adhesive performance of coatings under accelerated aging conditions DOI : 10.1007/s11998-013-9517-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9517-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21164 [article]

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