Aller sur edunet
Accueil
Résultat de la recherche
7 résultat(s) recherche sur le tag 'Polyaddition'
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherchePreparation and characteristics of a waterborne preventive stain coating material with organic- inorganic composites / Tamaki Wada in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
Titre : Preparation and characteristics of a waterborne preventive stain coating material with organic- inorganic composites Type de document : texte imprimé Auteurs : Tamaki Wada, Auteur ; Tadashi Uragami, Auteur Année de publication : 2006 Article en page(s) : p. 267-274 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères
Polyaddition
Résistance aux taches
Revêtements (produits chimiques):Peinture (produits chimiques)
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements en phase aqueuse:Peinture en phase aqueuseTags : 'Polycyclohexane dicarboxylate' Copolymère Polyester 'Propriété chimique' 'Résistance Solvant Polyadipate Polyisophtalate Acide mécanique' Polyaddition 'Copolymère ester uréthane' Index. décimale : 667.9 Revêtements et enduits Résumé : With the goal of developing a waterborne coating material that prevents staining, organic-inorganic composites prepared from colloidal silica and two types of acrylic resin emulsions were investigated as exterior coatings. Conventional acrylic resin emulsion and organic silane hybridized acrylic resin emulsion prepared by emulsion polymerization were mixed with colloidal silica to form organic-inorganic composite films. The addition of colloidal silica to emulsions yielded films with higher hydrophilkities, as indicated by lower water contact angles for these films in comparison to films without colloidal silica. The water contact angles of organic silane hybridized acrylic resin emulsion/colloidal silica films were lower than those of acrylic resin emulsion/colloidal silica films. Composite films containing colloidal silica particles smaller than 100 nm in diameter showed high hydrophilicities. Observations of the dispersed state of colloidal silica particles in organic-inorganic composite films by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrated that colloidal silica particles were densely aggregated on the film surface. Outdoor exposure tests of the coating materials prepared from organic silane hybridized acrylic resin and colloidal silica particles with diameters of 7.5 nm showed excellent stain resistance. DOI : 10.1007/s11998-006-0022-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0022-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3679
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 4 (10/2006) . - p. 267-274[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 005756 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Elucidation of polyurethane dispersions in a batch rotor-stator mixer Type de document : texte imprimé Auteurs : Supathorn Phongikaroon, Auteur ; Keith Carpenter, Auteur ; Richard V. Calabrese, Auteur Année de publication : 2004 Article en page(s) : p. 329-335 Note générale : Bibliogr. Langues : Américain (ame) Tags : Etude expérimentale Cinétique Agitation mécanique Polyaddition Préparation Dispersion aqueuse Uréthanne polymère Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, the effect of high energy input from mechanical agitation, provided with a high shear rotor-stator, on the drop size and the drop size distribution (DSD) of aqueous polyurethane (PU) dispersions is investigated. The effect of the dispersed phase volume fraction (phi) on the DSD of aqueous PU dispersions is also examined to understand the fundamental characteristics that result from the high shear mixing. DSD is measured by using either a high magnification video probe or dynamic light scattering, depending on the range of drop sizes. For the PU without any ionic content, the distributions appear to be bimodal with rather large drop sizes. The mean sizes of the first and second modes are about 10 and 22 µm, respectively. For the PU with an ionic content, the mean drop sizes are approximately 80 nm. The distributions reveal that functional chemistry plays a more dominant role in the process of making PU dispersions than the mechanical agitation, and that phi has a weak effect on the mean drop sizes. The results further suggest that mechanical agitation can be used to control the breadth of the distributions. DOI : 10.1007/s11998-004-0034-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0034-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3863
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 4 (10/2004) . - p. 329-335[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 000588 - Périodique Bibliothèque principale Documentaires Disponible
Titre : High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) Type de document : texte imprimé Auteurs : Pawan D. Meshram, Auteur ; Ravindra G. Puri, Auteur ; Amol L. Patil, Auteur ; Vikas V. Gite, Auteur Année de publication : 2013 Article en page(s) : p. 331-338 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Huile de coton
Polyéther bloc amide
Polyéther uréthane
Revêtements:PeintureTags : 'Revêtement haute performance' 'Polyéther-urethane amide' 'Ressource renouvelable' 'Huile végétale' Huile coton' Polyaddition 'Propriétés mécaniques' chimiques' 'Résistance impact' rayure' Flexibilité chimique' Index. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, polyetheramide resin was prepared through the condensation polymerization of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) with bisphenol-A. It was further modified by 2,4-toluene diisocyanate (TDI) in 10–30 wt% of polyetheramide to develop a series of moisture curing urethane-modified polyetheramide resins (UMCOPEtA). The synthesized resin was characterized using 1H NMR, 13C NMR, FTIR and solubility in various organic solvents at room temperature. The thermal and curing behavior of the resin was investigated using thermogravimetric analysis and differential scanning calorimetric techniques. The physico-chemical properties such as hydroxyl value, iodine value, specific gravity and mechanical properties like scratch hardness, impact, and flexibility were determined by standard laboratory methods. Coatings of UMCOPEtA resin were prepared on mild steel panels to evaluate chemical resistance performance against acid, alkali, water and xylene. The newly developed UMCOPEtA coatings showed improved hardness, impact, gloss, water and chemical resistance when compared with unmodified polyetheramide coatings, and thus were found to be suitable as a high performance coating material. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) - Synthesis of cottonseed oil polyeteramid (COPEtA) - Synthesis of urethane-modified polyétheramide (UMCOPEtA) - Preparation and testing of coatings - Characterization
- RESULTS AND DISCUSSION : FTIR spectral analysis - NMR spectral analysis - Physico-chemical characterization - Coating properties - Thermal analysisDOI : 10.1007/s11998-012-9449-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9449-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18732
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 331-338[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 15149 - Périodique Bibliothèque principale Documentaires Disponible 15593 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Preparation of modified polyesters containing triphosphorous and their applications to PU flame-retardant coatings Type de document : texte imprimé Auteurs : Hong-Soo Park, Auteur ; Hyuk-Jae You, Auteur ; Hye-Jin Jo, Auteur ; Il-Woo Shim, Auteur ; Hyun-Sik Hahm, Auteur ; Seong-Kil Kim, Auteur ; Young-Geun Kim, Auteur Année de publication : 2006 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Américain (ame) Tags : Esteruréthanne copolymère Propriété thermique Copolymère organométalloïdique Uréthanne chimique Additif Etude expérimentale Stabilité Inflammabilité Relation mise en oeuvre propriété Polyaddition Polycondensation Matériau revêtement Retardateur flamme Phosphate Préparation Index. décimale : 667.9 Revêtements et enduits Résumé : Three phosphorous functional groups were introduced in one structural unit of polymer backbone to enhance the flame retardancy of PU coatings. In the first step, we synthesized tetramethylene bis(orthophosphate) (TBOP) that contained two phosphorus functional groups in one structural unit. In the next step, we synthesized modified polyesters (ATBTP-10, -20, -30) that contained triphosphorous groups by condensing polymerization of TBOP, 1,4-butanediol, trimethylolpropane, adipic acid, and phenylphosphonic acid (PPA). The amount ofPPA in the ATBTPs was 10, 20, and 30 wt %. Then, flame-retardant PU coatings (AHFC-10, -20, -30) were prepared by curing ATBTPs with hexamethylene diisocyanate-biuret (curing agent) at room temperature. From the TGA analysis of diphosphorus-modified polyester (ATBT) and ATBTPs, the residues of ATBT, ATBTP-10, ATBTP-20, and ATBTP-30 were 24.6, 27.5, 29.2, and 31.9 %, respectively. From this result, it was found that the residue increased in relation to the amount of PPA. Physical properties of the films of flame-retardant coatings were deteriorated with the addition of PPA (flame retarding component), however, all the films of flame-retardant coatings, except AHFC-30, met the required physical properties standard for coatings. Char lengths of the AHFCs measured by the 45° Meckel burner method were 2.9 ~ 4.8 cm, and LOI values were 28 ~ 31 %, which indicates that the prepared AHFCs showed good flame retardancy. DOI : 10.1007/s11998-006-0005-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0005-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3720
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 53-60[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003762 - Périodique Bibliothèque principale Documentaires Disponible
Titre : The selectivity of isophorone diisocyanate in the urethane reaction : Influence of temperature, catalysis and reaction partners Type de document : texte imprimé Auteurs : R. Lomoelder, Auteur ; F. Plogmann, Auteur ; P. Speier, Auteur Année de publication : 1998 Article en page(s) : p. 31-38 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Polyuréthane' 'Diisocyanate organique' 'Cyclohexane dérivé' Polyaddition Diol 'Réaction catalytique' modèle' 'Activité 'Sélectivité catalyseur' Régiosélectivité 'Acide Lewis' 'Métal Composé' 'Base 'Amine tertiaire' 'Effet température' 'Etude expérimentale' comparative' Index. décimale : 667.9 Revêtements et enduits Résumé : The selectivity of isophorone diisocyanate (IPDI) in the urethane reaction demonstrates a strong dependence on temperature, catalyst type, and degrees of substitution of the reaction partner. It was possible to establish, by means of GC analysis of the monomer content, that dibutyltin dilaurate (DBTL) leads to the highest selectivity compared to the series of Sn, Zn, Bi, Fe, and amine catalysts. The ratio ofthe rate constant Γin the model reaction with 1-butanol at 20°C was increased from 5.5 in the uncatalyzed variant to 11.5 by catalysis with DBTL. The use of diazabicyclooctane succeeded in reversing the selectivity. The selectivity under DBTL catalysis dropped from 11.5 at 20°C to 6.5 at 100°C. The use of 2-butanol leads to a further increase in selectivity: Γ= 17 with DBTL catalysis at 20°C. By the resolution of all four monourethanes by GC analysis of the 1-butanol reaction, a significantly higher selectivity of trans IPDI was established: the ratio of secondary monourethane to primary monourethane with trans IPDI is higher by a factor of 2. A very good correlation between prepolymer synthesis and the model reactions was observed. Recommended optimal conditions for prepolymer synthesis based on IPDI are temperatures between 40°C to 60°C using DBTL catalysis. Note de contenu : - Selectivity of IPDI by application of various urethane catalysts
- Influence of temperature on the selectivity of IPDI - Additional steric hindrance : 2-butanol - Back to the pratical : NCO prepolymersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13179
in PAINTINDIA > Vol. XLVIII, N° 11 (11/1998) . - p. 31-38[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006481 - Périodique Bibliothèque principale Documentaires Disponible
PermalinkPermalink
