Identification of factors affecting recoating of two pack polyurethane monocoat on ABS substrate using Shainin design of experiments tools / Mahendra B. Chavan in PAINTINDIA, Vol. LIII, N° 10 (10/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 10 (10/2003) . - p. 31-40 Titre : Identification of factors affecting recoating of two pack polyurethane monocoat on ABS substrate using Shainin design of experiments tools Type de document : texte imprimé Auteurs : Mahendra B. Chavan, Auteur ; Bhavesh P. Patel, Auteur Année de publication : 2003 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : ABS components are painted with two pack acrylic - isocyanate Polyurethane paints. A common problem faced in the recoating of such components is lifting of the earlier coat, which is more severe at lower Dry Film Thickness [DFT]. The various factors in the formulation which can affect the recoatability performance such as Tg of Acrylic resin used, presence or absence of catalyst, OH: NCO ratio, type of thinner used and type of Isocyanate used for cross linking were studied by application of the Shainin DOE tools. Presence of the strong catalyst and Low Tg of Acrylic resin used were found to be the most significant factors responsible for poor recoatability performance. The blend of High Tg resin with Low Tg resin in a suitable ratio can give recoatability performance comparable to High Tg resin. The use of a weak catalyst like Zinc Octoate does not affect the recoatability performance of the paint. Note de contenu : - SHAININ DOE TOOLS - EXPERIMENTAL - Materials - Processing of PU Paint - Application of Shainin Tools (Variable Search) for the study Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12180 [article]

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