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New high performance two-component wood coatings comprised of a hydroxy functional acrylic emulsion and a water-dispersible polyisocyanate / Sharon Xudong Feng in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 899 (12/1999) . - p. 51-57 Titre : New high performance two-component wood coatings comprised of a hydroxy functional acrylic emulsion and a water-dispersible polyisocyanate Type de document : texte imprimé Auteurs : Sharon Xudong Feng, Auteur ; Mike Dvorchak, Auteur ; Kevan E. Hudson, Auteur ; Christine Renk, Auteur ; Tammy Morgan, Auteur ; Vic Stanislawczyk, Auteur ; Francine Shuster, Auteur ; Dick Todd, Auteur ; Howard Bender, Auteur ; Jim Papenfuss, Auteur Année de publication : 1999 Article en page(s) : p. 51-57 Note générale : Appendices Langues : Américain (ame) Catégories : Ameublement Bois -- Revêtements Formulation (Génie chimique) Hydroxyle En chimie organique, un hydroxyle (ou oxhydryle) peut désigner deux entités. Un groupement -OH, appelé aussi hydroxy, qui se rencontre en particulier dans les alcools et les phénols. Un radical : HO^{\bullet}. Il est produit par exemple lors de réactions de dissociation de peroxydes, en présence d'ions de métaux de transition (Fe(II), Cu(I), réaction de Fenton), de chauffage ou de rayonnement. Liants Polyacryliques Polyisocyanates Revêtements bi-composant Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Statistical methods were used to develop hydroxy functional acrylic emulsions for use with a water-dispersible polyisocyanate crosslinker. The resulting two-component waterborne coating systems were optimized for kitchen cabinet and office furniture applications. Key performance criteria included appearance and aesthetics pot life, print and mar resistance, and chemical resistance involving both Kitchen Cabinet Manufacturers, Association (KCMA) and office furniture requirements. Statistical analysis revealed several strong correlations between acrylic emulsion hydroxy level, particle size, composition Tg and polymerization process and wood coating performance. For example, smaller acrylic emulsion particle size was found to yield many performance benefits with few detriments. Coating formulation variables were also found to be significant. Ultimate coating hardness increased with water-dispersible polyisocyanate level, yet early hardness readings correlated negatively with water-dispersible polyisocyanate level. Plasticization and crosslinking effects were thought to be responsible. Higher ethylene glycol monbutyl ether (EB) coalescent level was found to correlate negatively with coating hardness, suggesting a reaction between the EB hydroxyl group and the water-dispersible polyisocyanate, resulting in plasticization of the coating. Note de contenu : HFAE POLYMERIZATION VARIABLES : Hydroxyl level - Polymerization process - Composition Tg - Acrylic emulsion particle size - COATING FORMULATION VARIABLES : Level of WDPI - Neutralizing amine - Agitation during the dispersion of the WDPI in the HFAe - Coalescent level - RESULTS AND DISCUSSION : Formulation gel time - WDPI level effect on hardness with dry - coating hardness/appearance - Acrylic emulsion hydroxy level effects - Acrylic emulsion particle size - Acrylic emulsion process - Type of neutralizing amine - Coalescent level Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17947 [article]

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Preparation and physical properties of polyurethane flame retardant coatings using phosphorus-containing lactone modified polyesters / Hong-Soo Park in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 899 (12/1999) . - p. 59-65 Titre : Preparation and physical properties of polyurethane flame retardant coatings using phosphorus-containing lactone modified polyesters Type de document : texte imprimé Auteurs : Hong-Soo Park, Auteur ; Soon-Yong Kwon, Auteur ; Kum-Jong Seo, Auteur ; Wan-Bin Im, Auteur ; Jong-Pyo Wu, Auteur ; Myong Ji, Auteur ; Seong-Kil Kim, Auteur ; Sam Hwa, Auteur Année de publication : 1999 Article en page(s) : p. 59-65 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Lactones Phosphore Polyesters Polyisocyanates Polymères ignifuges Polyuréthanes Revêtements bi-composant Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : Two-component polyurethane flame retardant coatings were prepared using phosphorus-containing lactone modified polyesters (PLMPs) and polyisocyanate. PLMPs were synthesized by polycondensation of dimethyl phenylphosphonate, a flame retardant component with polycaprolactone, adipic acid, and trimethylolpropane. PLMPs were prepared with dimethyl phenylphosphonate content from 10 to 20 wt%. It was found that various physical properties of these new flame retardant coatings were comparable to non-flame retardant coatings. The flammability of coatings depends strongly on the dimethyl phenylphosphonate content in PLMP. Coatings with 20 wt% dimethyl phenylphosphonate content did not burn in the vertical burning test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of lactone modified polyester - Synthesis of phosphorus-containing lactone modified polyesters - Instrumental analyses - Preparation of polyurethane coatings - Physical properties of the coatings - Flame retardancy tests - Surface morphology - RESULTS AND DISCUSSION : Identification of lactone modified polyester - Identification of phosphorus-containing lactone modified polyester - Rheological behavior of phosphorus-containing lactone modified polyester - Thermal behavior of phosophorus-containing lactone modified polyesters - Physical properties of coatings - Flame retardancy of coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17948 [article]

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Electrochemical impedance spectroscopy as a tool for investigating the quality and performance of coated food cans / P. kern in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 899 (12/1999) . - p. 67-74 Titre : Electrochemical impedance spectroscopy as a tool for investigating the quality and performance of coated food cans Type de document : texte imprimé Auteurs : P. kern, Auteur ; J. Lange, Auteur Année de publication : 1999 Article en page(s) : p. 67-74 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aliments -- Emballages Can coating Electrochimie Industries agro-alimentaires -- Emballages Qualité -- Contrôle Spectroscopie d'impédance électrochimique Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : In the present work, electrochemical impedance spectroscopy (EIS) is explored as a tool for evaluating the quality of coatings on food cans. The properties of the coating-metal interface are evaluate using an equivalent electrical circuit representing intact and defect coating areas. The element corresponding to the charge transfer capacitance under pores, proportional to the wetted metal surface, is found to be the most useful element for quality evaluation. It is shown that with EIS, differences can be detected between new and filled cans from different suppliers, as well as between different product formulations. Three measurement techniques, i.e., initial state characterization, rapid dc aging and long-term electrolyte aging, are applied to a series of pet-food and beveroge cans, and the results compared with the performance of the same cans after filling and storage. It 15 shown that all three measurement techniques give basic guidance as to the long-term performance of the filled cans. However, the electrolyte-aging test was found to give the best precision in the performance prediction. Note de contenu : - EXPERIMENTAL : Materials - EIS measurement routines - Methods - RESULTS AND DISCUSSION : Evaluation of the equivalent electrical circuit - Initial state characterization and dc tests - Long-term measurements - Accelerated tests vs. performance of filled cans Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17949 [article]

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Measurement of condensate- and smoke-causing emissions from automotive paints and sealers / Martin A. Ferman in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 899 (12/1999) . - p. 75-80 Titre : Measurement of condensate- and smoke-causing emissions from automotive paints and sealers Type de document : texte imprimé Auteurs : Martin A. Ferman, Auteur ; Devi N. Rai, Auteur ; Joseph C. Simmer, Auteur ; Sheila F. Kia, Auteur Année de publication : 1999 Article en page(s) : p. 75-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ateliers de peinture industrielle Automobiles -- Revêtements:Automobiles -- Peinture Matériaux -- Cuisson Produits d'étanchéité Revêtements -- Défauts:Peinture -- Défauts Index. décimale : 667.9 Revêtements et enduits Résumé : Two major problems that periodically arise during the surface coating of automobiles are oven plume opacity (smoke that violates local opacity ordinances) and oven condensate that can drip on cars and leave an oily residue. Both of these problems are caused by the evaporation of semi-volatile organic compounds in bake ovens. A new test procedure has been developed to standardize the analysis and reporting of condensate/smoke-causing compounds that are emitted from paint, sealer, and coating materials when they are baked. Use of this test will allow identification and quantification of potential sources of condensate, smoke, and opacity in the laboratory. The information is essential to material suppliers and formulators, and to users who prescreen materials in order to avoid costly problems in production. Note de contenu : - Sample preparation - Test procedure - Analysis - Test matrix - Reporting - Reproducibility Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17950 [article]

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