Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate / Kim Teck Teo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 6 (11/2020) . - p. 1571-1585 Titre : Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate Type de document : texte imprimé Auteurs : Kim Teck Teo, Auteur ; Aziz Hassan, Auteur ; Seng Neon Gan, Auteur Année de publication : 2020 Article en page(s) : p. 1571-1585 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Brillance (optique) Caractérisation Copolymère uréthane acrylique Essai de dureté Essais accélérés (technologie) Essais de brouillard salin Essais dynamiques Métaux -- Revêtements protecteurs Poids moléculaires Résistance à la fissuration Résistance au chocs Résistance chimique Revêtements -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Transition vitreuse Vernis -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : A series of four polyol macromers with similar hydroxyl number was prepared by reacting palm fatty acid distillate with neopentaglycol, pentaerythritol, and separate equimolar amounts of isophthalic acid (IPA), terephthalic acid (TPA), phthalic anhydride (PA), and adipic acid (AA). Each macromer was then copolymerized with 2-hydroxylethyl acrylate (2-HEA) and toluene diisocyanate to produce the UV curable resins labeled as UA-IPA, UA-TPA, UA-PA, and UA-AA, respectively. The glass transition temperature (Tg), pendulum hardness, and adhesion properties of the cured films were studied. In general, all the resins produced coatings with high gloss and good adhesion. When accelerated weathering tests were carried out, films of UA-TPA could withstand UVA exposure up to 1500 h. When subjected to methyl ethyl ketone double rub test, cured films of UA-IPA and UA-TPA could withstand the highest double rubs at 90 times, followed by UA-PA and UA-AA at 45 and 15 times, respectively. Under salt spray corrosion test for 720 h, cured films showed good corrosion resistance with no observable blistering, except for UA-AA that showed slight blistering. Excellent water resistance was achieved by all cured films with good adhesion and minimal gloss reduction. Note de contenu : - EXPERIMENTS : Materials - Synthesis of hydroxyl terminated macromer - Urethane acrylate resins (UA) - Clearcoat formulation - Application of UA clearcoat on metal panel - FTIR analysis - Molecular weight measurement - Glass transition measurement - Pendulum hardness - Acid value and isocyanate value - Hydroxyl number - Adhesion performance - Pencil hardness - Gloss measurement - Flexibility of coating by T-bend test - Resistance of cracking by impact deformation - Cured film durability by QUV-A accelerated weathering test - Resistance of coating to MEK - Water resistance test - Monitoring of UV curing - UV-curable UA resin in metal coating application - RESULTS AND DISCUSSION : Synthesis of macromer - Synthesis of UA-IPA, UA-TPA, UA-PA and UA-AA - UV Curing of resins - Change in Tg during UV curing - Pendulum hardness analysis of cured film - Physical and mechanical performance of UV cured film in metal coating - Film flexibility by T-bend test - Cracking resistance of the UV cured film by impact deformation - Solvent resistance of the UV cured film - Durability of UV cured film - Performance of water resistance of the UV cured film DOI : https://doi.org/10.1007/s11998-020-00379-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00379-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34961 [article]

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