High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil) / Pawan D. Meshram in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 3 (05/2013) . - p. 331-338 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:Peinture Tags : '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 analysis DOI : 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18732 [article]

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Performance control of polyether-based reactive hot melt adhesives / Ricardo De Genova in ADHESIVES AGE, Vol. 40, N° 12 (11/1997)  

[article]  inADHESIVES AGE > Vol. 40, N° 12 (11/1997) . - p. 57-60 Titre : Performance control of polyether-based reactive hot melt adhesives Type de document : texte imprimé Auteurs : Ricardo De Genova, Auteur ; Laura Grier, Auteur ; D. Phillip Murray, Auteur ; William Clay, Auteur Année de publication : 1997 Article en page(s) : p. 57-60 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs thermofusibles Polyéther uréthane Polyols Rhéologie Stabilité thermique Viscosité Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The study shows that by manipulating the polymer structure, it is possible to produce polyether polyol-based polyurethane reactive hot melt adhesive systems with green strengths, viscosity and melt stability properties comparable to polyester polyol-based systems. Melt stability is affected by the final NCO content of the prepolymer and the temperature of application. Higher index allows for lower application temperatures, which is considered a desirable feature by the adhesive user due to industrial hygiene concerns. For the purposes of this study, tack free times were faster than what is normally expected, but it should be noted that this work was carried out on prepolymers without any further formulation additives. The adhesive manufacturer can manipulate this variable to some extent by using tackifiers. Note de contenu : - Green strength - Viscosity - Melt stability - Tack free time En ligne : https://drive.google.com/file/d/1ZZusP5Z7zBsoUhpk3XD5PXweYx0Vt7xg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20464 [article]

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Preparation of UV curable emulsions using PEG-modified urethane acrylates and their coating properties / Myung-Eon Song in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 862 (11/1996)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 862 (11/1996) . - p. 43-50 Titre : Preparation of UV curable emulsions using PEG-modified urethane acrylates and their coating properties Type de document : texte imprimé Auteurs : Myung-Eon Song, Auteur ; Ju-Young Kim, Auteur ; Kyung-Do Suh, Auteur Année de publication : 1996 Article en page(s) : p. 43-50 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane acrylate Copolymères réticulés Formulation (Génie chimique) Liants Polyéther uréthane Polyéthylène glycol Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet:Peinture en phase aqueuse -- Séchage sous rayonnement ultraviolet Revêtements en phase aqueuse:Peinture en phase aqueuse Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : To prepare self-emulsifiable urethane acrylate, PEG-modified urethane acrylates (PMUA) containing polyoxyethylene groups as a terminal group were synthesized by the reaction of PEG [poly(ethylene glycol)] with residual isocyanate groups of a urethane acrylate. As the reaction molar ratio of PEG to HEMA increased, droplet sizes and viscosity of PMUA emulsions decreased, however, the tensile strength and conversion of UV-cured PMUA film decreased. The molecular weight and type polyol had a significant influence on emulsion droplet size and stability. The coating properties and mechanical properties of the UV-cured film were improved by using crosslinking agent and epoxy acrylate. However, centrifugal stability was decreased by the addition of these additives. Note de contenu : - EXPERIMENTAL : Synthesis of PMUA and UA - Preparation of UV-curable formulations - Measurement - Characterization of coating properties - RESULTS AND DISCUSSION : UA emulsions prepared using mixed surfactants - Soap-free emulsion of PMUA - The effect of crosslinking agent (CA) and epoxy acrylate (EA) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18454 [article]

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Unifying model for understanding HEUR associative thickener influences on waterborne coatings : I. HEUR interactions with a small particle latex / Mao Chen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 73-80 Titre : Unifying model for understanding HEUR associative thickener influences on waterborne coatings : I. HEUR interactions with a small particle latex Type de document : texte imprimé Auteurs : Mao Chen, Auteur ; Wyllie H. Wetzel, Auteur ; Zeying Ma, Auteur ; J. Edward Glass, Auteur ; Robert J. Buchacek, Auteur ; John G. Dickinson, Auteur Année de publication : 1997 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption Epaississants Hydrophobie Polyéther uréthane Revêtements -- Additifs:Peinture -- Additifs Revêtements en phase aqueuse:Peinture en phase aqueuse Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : The structural features of associative thickeners influence their viscosifying properties in neat and surfactant containing aqueous solutions and in architectural coating formulations. Our understanding of the phenomena based on model associative thickener of the Hydrophobically modified Ethoxylate URethane (HEUR) type are presented. These studies provide general concepts in aqueous solutions, but they do not provide a quantitative model for understanding the influence of associative thickeners in coating formulations. To provide a more quantitative description, the interactions of associative thickeners with the film forming latex are considered in this study. This requires a knowledge of the free surfactant concentration in the formulation that depends on the residual amount present in the latex and the amounts added with the pigment grind, colorant, etc. The competitive interaction of the surfactants and associative thickener types for the surface of both disperse phases is a key variable. These interactions with the latex will be discussed in this article in an effort to define an encompassing model for understanding how HEUR associative thickeners influence waterborne coatings. Note de contenu : - Adsorption on small particles latexes - Rheology of thickened dispersions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18232 [article]

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