Syntheses and characterizations of two-component polyurethane flame retardant coatings using 2,4-dichloro modified polyesters / Chang-Hwan Park in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 875 (12/1997) . - p. 41-47 Titre : Syntheses and characterizations of two-component polyurethane flame retardant coatings using 2,4-dichloro modified polyesters Type de document : texte imprimé Auteurs : Chang-Hwan Park, Auteur ; Jong-Pyo Wu, Auteur ; Hong-Soo Park, Auteur ; Seong-Kil Kim, Auteur Année de publication : 1997 Article en page(s) : p. 41-47 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Dichlorobenzoïque, Acide Durée de vie en pot Esterification Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Polycondensation Polyester chloré Polyesters Polyisocyanates Polyuréthanes Revêtement -- Séchage Revêtements bi-composant Triméthylolpropane Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane flame retardant coatings are composed of polyols and polyisocyanates. Flame retardant groups are usually introduced to the polyol structure. In this research intermediates were obtained by esterification of 2,4-dichlorobenzoic acid and trimethylolpropane for the purpose of introducing a flame retardant group to the polyol structure. Then chlorine-containing modified polyesters were synthesized by polycondensation of trimethylolpropane, adipic acid, 1,4-butanediol, and the intermediate. The content of 2,4-dichlorobenzoic acid in the intermediate was varied with 10, 20, and 30 wt%. Two-component polyurethane flame retardant coatings were prepared by blending the products with polyisocyanate. Various physical properties of these new flame retardant coatings were comparable to non-flame retardant coatings. They showed drying times of four to seven hours and pot life times of 14-20 hr, which could belong to the flame retardant coatings with long pot life time. The coating with 30 wt% 2,4-dichlorobenzoic acid showed a self-extinguishing property in the vertical burning test. Note de contenu : - EXPERIMENTAL : Materials - Syntheses of 2,4-dichloro modified polyesters - Chlorine contents and kinematic viscosity - Instrumental analyses - Preparation of two-component polyurethane flame retardant coatings - Tests of General properties for flame retardant coatings - Flame retardancy tests - RESULTS AND DISCUSSION : Indentification of 2,4-dichloro modified polyesters - Effects of DCBA content on the kinematic viscosity of modified polyesters - Thermal properties of 2,4-dichloro modified polyesters - Physical properties of flame retardant coatings - Flame retardancy of coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18068 [article]

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