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Heat resistant, ultra-smooth UV curable alkyd primers for PVD / Akio Umino in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4636 (11/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4636 (11/2017) . - p. 15-22 Titre : Heat resistant, ultra-smooth UV curable alkyd primers for PVD Type de document : texte imprimé Auteurs : Akio Umino, Auteur ; Hirotake Fukuoka, Auteur ; Ichiro Azuma, Auteur Année de publication : 2017 Article en page(s) : p. 15-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dépôt en phase vapeur Essais d'adhésion Formulation (Génie chimique) Polyalkydes Polymères en émulsion Primaire (revêtement) Résistance thermique Revêtements -- Séchage sous rayonnement ultraviolet Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The authors discusses the latest UV curable, water-based alkyd resin, which offers excellent adhesion to various substrates. The authors of this paper have developed a novel alkyd resin and completed a primer paint that can be used for all substrates. This alkyd resin has benn adopted by the world's leading headlamp manufacturer, realising the reduction of environmental burden due to painting loss and a reduction of working cost ; demand continues to increase year over year. This paper explores the design of the novel alkyd resin which realises excellent heat resistance to form a crosslinked structure with an acrylate compound via UV irradiation and also exhibits excellent surface smoothness. Furthermore, the development of waterborne alkyd resins suitable for this application will be discussed. Note de contenu : - UV CURE CONCEPT OF ALKYD RESINS - ALKYD RESIN SYNTHESIS AND PAINT FORMULATION : Spray, curing, and PVD condition - Appearance and cross-hatched adhesion test results in a PPS substrate - Heat resistance evaluation - IR spectra before and after UV-irradiation - Observation of surface shape - Cross-hatched adhesion test for various substrates - Characteristic of alkyd by each thermomechanical analyser (TMA) and thermogravimetry differential thermal analysis (TGA-DTA) - DESIGN OF UV CURABLE WATER-BASED ALKYD RESIN DISPERSION : Synthesis of water-based alkyd resin - Paint formulation - Spray, curing, and PVD condition - Appearance and cross-hatched adhesion test results for various substrates - FIGURES : 1. Expression of mirror surface design by primer of PVD - 2. Substrate of headlamp and its requirement of heat resistance - 3. Crosslinking of alkyd resin and acrylate compound by UV irradiation - 4.Appearance result after heat resistance test at 230°C - 5. Infrared absorption spectrum of prototype 3 before and after UV irradiation - 6. Surface observation results of the Prismatic pattern in prototype 5 - 7. Comparison of alkyd with acrylic by thermal equipment analysis - 8. Image of UV curable waterborne polymers - 9. Synthetic summary of the water-based alkyd resin TABLES : 1. Synthesised alkyd resin - 2. Composition of UV curable coating for PVD primer - 3. Formulation of test paint - 4. Results of heat resistance test of prototype 1 to 6 on a PPS substrate - 5. Results of cross-hatched adhesion test on various substrates on initial and after heat resistance test - 6. Technical data of UV curable water-based paints - 7. Formulation of test paint - 8. COmparison of application test results between water-base and solvant En ligne : https://drive.google.com/file/d/13nmsbWiqaCWskoEhEk0yLFUY7G1fjTAg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29464 [article]

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Appealing surfaces of coil coatings / Marco Heuer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4636 (11/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4636 (11/2017) . - p. 24-27 Titre : Appealing surfaces of coil coatings Type de document : texte imprimé Auteurs : Marco Heuer, Auteur ; Fabian Eichenberger, Auteur Année de publication : 2017 Article en page(s) : p. 24-27 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimousse Coil coatings 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. Polyesters Revêtements -- Additifs Revêtements -- Propriétés optiques Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : End customers' decisions are ultimately determined by quality and high demand for excellent visual appearance. The new surface additives improve processing and visuel appearance significantly. In solvent-based can and coil coatings, such specially developed polyacrylates provide excellent appearance. The products' composition and their far-reaching listings and registration leads to universal application. Recoatability is excellent, due to the fact that they do not impair the surface energy of cured films. Both new additives fulfill 21 CFR FDA regulations 175.300 and all components are listed in Annex 6 in the lists for evaluated (A) or not evaluated (B) substances according to Swiss Ordinance (SR 817.023.21). - The new flow additive shows a broad compatibility with all binders and high optical transparency. - The new flow additive provides flow improvement as well as an additional deaerating effect. - Both products are free of hazardous ingredients like BPA, aromatics and halogens. The excellent optical appearance attracts can and coil coating customers worldwide Note de contenu : - Increasing quality demands for coil coatings - Flow additives provide excellent optical appearance - Outlook : further increase in optical requirements - Far-reaching listing and registration globally - Table : Improve optical appearance via flow promotion - FIGURES : 1. Excellent flow promotion by addition of 0.4% new flow additive to the formulation, applied by spin coater - 2. Improved defoaming properties in the formulation testing system based on polyester-/melamine - 3. Excellent optical appearance via improved defoaming properties by addition of 0.4% - new flow additive to the formulation, applied by spin coater En ligne : https://drive.google.com/file/d/1iWAruHlFuXLSke_--dOsci9WKWE4A1Mn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29466 [article]

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Curing kinetic of epoxy oligomers in the presence of polyaniline / V. Kurbatov in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4636 (11/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4636 (11/2017) . - p. 36-38 Titre : Curing kinetic of epoxy oligomers in the presence of polyaniline Type de document : texte imprimé Auteurs : V. Kurbatov, Auteur ; Eugene A. Indeikin, Auteur Année de publication : 2017 Article en page(s) : p. 36-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cinétique chimique Eméraldine Epoxydes Oligomères Polyaniline Polymérisation Index. décimale : 667.9 Revêtements et enduits Résumé : The influence of polyaniline forms on the rate and depth of curing of epoxy oligomers was determined. It is established that the use of the emeraldine form of polyaniline as a modifying agent of an amine hardener leads to the acceleration of the curing process, unlike the pernigraniline form. Studying the changes of the electronic absorption spectrum of the modified amine hardener shows the transition of the emeraldine form of polyaniline in the pernigraniline form over time. Note de contenu : - Fig. 1. The reversible inversion of different forms of PANi - Fig. 2. Absorption spectra MPMDA, PANi, MPMDA modified by PANI in the n-methylpyrrolidum-2-on - Fig. 3. The formation of molecular excitons with charger transfer in the quinoid ring of two adjacent benzene rings - Fig. 4. Changes in the absorption spectrum of the MPMDA modified by PANi over time. Dwell time PANi modified MPMDA 1hr, 10 days, 25 days, 90 days - Fig. 5. The absorption spectra of MPMDA modified by PANi after 90 days of exposure, and after introduction of the reducing agent in it - TICI3 - Fig. 6. Initial cure rate - dZ/dt and the dynamic viscosity - vs the content of the emeraldine and pernigraniline form by PANi in the epoxy composition En ligne : https://drive.google.com/file/d/1mGgvpvJgrctKqLFtYQyyl80d0cbbbJtt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29467 [article]

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Polymer Paint Colour Journal - PPCJ Vol. 207, N° 4636 URL