32 résultat(s) recherche sur le tag 'Réticulation'

Model compound study for acrylic latex crosslinking reactions with cycloaliphatic epoxides / Shaobing Wu in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 869 (06/1997)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 869 (06/1997) . - p. 43-49 Titre : Model compound study for acrylic latex crosslinking reactions with cycloaliphatic epoxides Type de document : texte imprimé Auteurs : Shaobing Wu, Auteur ; Mark D. Soucek, Auteur Année de publication : 1997 Article en page(s) : p. 43-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères Epoxydes Latex Polyacryliques Polymères aliphatiques Réticulation (polymérisation) Tags : 'Acrylique  acide  copolymère'  'Méthacrylate  d'hydroxyéthyle'  Latex  Réticulation  Epoxyde  'Composé  bicyclique'  'Réaction  modèle'  Cinétique  'Mécanisme  réaction'  Régiosélectivité  'Effet  température'  pH  Stoechiométrie Index. décimale : 667.9 Revêtements et enduits Résumé : Cyclohexene oxide, methanol, and acetic acid were used as model compounds to study the competitive crosslinking of cycloaliphatic diepoxides with hydroxyl and carboxyl functionalized acrylic copolymers. Model reactions were performed as a function of molar ratio, pH, and temperature. At a 2:1:1 molar ratio of epoxide: hydroxyl: carboxyl, the formation of the primary ether and ester linkages were found to be the major crosslinking reactions. By increasing the molar ratio to 3:1:1, the formation of both the ether and ester oligomer products were significantly enhanced. As the pH of the media decreased, the rate of the crosslinking reactions increased, and generally ester products were formed preferentially to ether products. A temperature dependence of the rate of reactions were generally more pronounced at higher pH. Note de contenu : - EXPERIMENTAL SECTION : Materials - Instrumentation - General procedure for model reactions - Sampling and GC analysis - RESULTS AND DISCUSSION : Model compound products and molar ratio effect on product formation - pH effect on the formation of primary and secondary ether and ester products - Temperature effect on the formation of primary and secondary products - Proposed crosslinking modes for cycloaliphatic epoxides with hydroxyl and carboxyl functionalized acrylic copolymers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18245 [article]

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Water-borne crosslinkable fluorochemical coatings / G. Moore in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 9 (09/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 9 (09/1995) . - p. 377-379 Titre : Water-borne crosslinkable fluorochemical coatings Type de document : texte imprimé Auteurs : G. Moore, Auteur ; D.-W. Zhu, Auteur ; M. Pellerite, Auteur ; C. Burton, Auteur ; D. Schmidt, Auteur ; C. Coburn, Auteur ; G. Clark, Auteur Année de publication : 1995 Article en page(s) : p. 377-379 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  eau'  Liant  'Polymère  fluor'  Réticulation  Utilisation Index. décimale : 667.9 Revêtements et enduits Résumé : On développe actuellement des revêtements fluorés hydrodiluables et réticulables, intéressants pour une gamme d'applications exigeant un faible degré d'énergie superficielle, la facilité de nettoyage, la résistance aux salissures et aux taches et/ou la compatibilité avec l'environnement. On considère l'importance du constituant fluoré et l'influence du niveau de réticulation sur les performances des revêtements. On discute également des possibilités d'application aux revêtements anti-adhésifs. Note de contenu : - WXF coatings - Fluorochemical component - Crosslinking Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16992 [article]

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Crosslinking with malonate blocked isocyanates and with melamine resins / Z. Alex He in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 889 (02/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 889 (02/1999) . - p. 85-90 Titre : Crosslinking with malonate blocked isocyanates and with melamine resins Type de document : texte imprimé Auteurs : Z. Alex He, Auteur ; Werner J. Blank, Auteur Année de publication : 1999 Article en page(s) : p. 85-90 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Industrie  automobile'  'Matériau  revêtement'  Vernis  Peinture  Durcissement  Réticulation  'Mécanisme  réaction'  'Isocyanate  polymère'  'Copolymère  réticulé'  'Mélamine  résine'  'Malonique  dérivé  Polyol Index. décimale : 667.9 Revêtements et enduits Résumé : Automotive clearcoats with improved acid etch resistance are being formulated using a combination of a dialkyl malonate blocked polyisocyanate, a melamine crosslinker, and an acrylic polyol. These coatings contain lower levels of melamine crosslinker compared to conventional acrylic/HMMM systems and show excellent acid etch resistance. We explored the reaction mechanism of this complex crosslinking system and found explanations for the good chemical resistance properties. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17841 [article]

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Interdiffusion and crosslinking in thermoset latex films / Mitchell A. Winnik in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 925 (02/2002)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 925 (02/2002) . - p. 49-63 Titre : Interdiffusion and crosslinking in thermoset latex films Type de document : texte imprimé Auteurs : Mitchell A. Winnik, Auteur Année de publication : 2002 Article en page(s) : p. 49-63 Note générale : Bibliogr. Langues : Américain (ame) Tags : Article  synthèse  Carbodiimide  polymère  Mélamine  résine  Acrylamide  dérivé  Diffusion  mutuelle  Réticulation  Formation  film  Thermodurcissable  Peinture  émulsion  eau  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : Thermoset latex systems represent an attractive approach to obtaining the high performance needed in many different kinds of industrial coatings, while at the same time satisfying the growing requirement for environmental friendliness. In these coatings, in the dispersed state, the reactive groups are packaged inside of polymer particles. These latex particles deform as the coating dries to form a transparent binder phase. The useful properties of mechanical strength, as well as scrub and solvent resistance, develop over time. This paper focuses on the idea that to achieve the desired properties in a thermoset latex coating, one has to pay proper attention to the relative rates of polymer diffusion and cross-linking in the coating. Strength in these films develops as a consequence of chains that connect crosslink points on opposite sides of interface formed between a jacent particles in the film. Thus polymer diffusion must precede extensive bond formation created by the crosslinking chemistry. This paper reviews fundamental concepts and then describes experiments in three separate systems, in which my students have studied both the rates of polymer diffusion and the rates of the crosslinking reaction. These experiments show that the formulator has a number of tools that can be used to vary the relative rates of these processes. Catalyst strength and concentration will affect the reaction rote. Polymer chain length will have a large influence on the polymer diffusion rate. Temperature changes will often have a larger effect on the polymer diffusion rate than on the rate of the crosslinking reaction, because the effective activation energy for diffusion (through changes in free volume) are normally larger than the activation energy for the chemical reaction. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5674 [article]

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Novel curing / dave Bunn in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 19, N° 6 (06/2012)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 19, N° 6 (06/2012) . - p. 37-38 Titre : Novel curing : An emerging technology may allow adhesives in opaque substrates to be cured by UV or visible light Type de document : texte imprimé Auteurs : dave Bunn, Auteur Année de publication : 2012 Article en page(s) : p. 37-38 Langues : Américain (ame) Catégories : Colles:Adhésifs Lumière visible Luminescence Particules (matières) Rayonnement ultraviolet Réticulation (polymérisation) Tags : Adhésifs  Réticulation  'Lumière  visible'  'Rayonnement  ultraviolet'  'Matériaux  opaques'  'Générateur  lumière  activé  rayon  X'  'Particules  luminescentes'  'modulateur  énergie' Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Adhesives and coatings cured by ultraviolet (UV) or visible light have become valuable tools in modern-day assembly operations, particularly in high-technology industries such as electronics and medical devices. Most UV adhesives are based on free radical polymerization systems with acrylate or methacrylate monomers, although other systems such as cationically cured cycloaliphatic epoxies, vinyl ethers, and oxetanes are known. - UV systems offer users the following advantages: - Quick cure speed (often in seconds) leads to increased productivity - Energy savings; requires a fraction of the power consumption of heat curing - Fewer stresses and movement than in heat cure - Less floor space due to small, compact curing systems - Single component (no application of primers or mixing) - Reduced work in process (assembly to pack measured in minutes) - Safety (no hazardous solvents or other emissions) En ligne : http://www.adhesivesmag.com/articles/print/91089-novel-curing Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19029 [article]

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A shellac derivative in thermoset coatings / Jennifer T. Otto in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 4 (07/2010)  

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Rhéologie et réticulation des polymères : Une nouvelle méthode de détermination du point de gel / V. Verney in LES CAHIERS DE RHEOLOGIE, Vol. XVII, N° 1 (10/2000)

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Effect of carbon black on adhesion to plastics in solventborne 2K polyurethanes / Kalpana S. Katti in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 903 (04/2000)

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Effect of crosslinker reaction rate on film properties for thermoset coatings / Ward T. Brown in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 904 (05/2000)

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Interfacial studies of crosslinked urethanes : part IV. Substrate effect on film formation in polyester waterborne polyurethanes / Marek W. Urban in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 896 (09/1999)

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Novel, water-based fluorinated polymers with excellent antigraffiti properties / Jurgen Scheerder in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 8 (10/2005)  

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Polymer diffusion and mechanical properties of films prepared from crosslinked latex particles / Patrick Pinenq in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 903 (04/2000)

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Polyorthoesters for low-VOC coatings / Hisashi Isaka in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 937 (02/2003)

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Radiation-curable silicone-based additives for coatings and printing inks / Karen Bowling in PAINTINDIA, PAINTINDIA (03/1999)

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Star oligomers with different reactivity in low VOC polyurethane coatings : part II / J. Huybrechts in SURFACE COATINGS INTERNATIONAL, Vol. 81, N° 4 (04/1998)

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UV curing of a pressure sensitive adhesive coating studied by real - time ftir spectroscopy and laboratory scale curing experiments / Armin Tauber in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 927 (04/2002)

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Oxazolidines and tetramethylxylenediisocyanate based polyurethanes in legislation-compliant anticorrosion coatings / G. A. Howarth in SURFACE COATINGS INTERNATIONAL, Vol. 82, N° 1 (01/1999)

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Catalytic curing of industrial OEM coatings - Part I / D. S. Hardas in PAINTINDIA, Vol. XLV, N° 6 (06/1995)

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Cationic uv-cured coatings containing epoxidized soybean oil initiated by new onium salts containing tetrakis (pentafluorophenyl) gallate anion / Haiyan Gu in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 927 (04/2002)

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Cure of secondary carbamate groups by melamine-formaldehyde resins / H. P. Higginbottom in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 894 (07/1999)

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Cycloaliphatic AMT polyisocyanates and their blends / P. B. Jacobs in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/96 (09/1996)

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Effectiveness of hydroxyfunctional chain transfer agent in acrylic resins / Amitabha Ray Chaudhuri in PAINTINDIA, Vol. LII, N° 9 (09/2002)

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Epoxy flooring compounds - A versatile material for protection / N. R. Kondekar in PAINTINDIA, Vol. LI, N° 2 (suppl.) (02/2001)

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Evaluation of alkane sulfonic acid catalysts and derivatives for curing activity in a melamine/acrylic polyol coating formulation using Fourier transform infrared spectroscopy / Dana Garcia in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 908 (09/2000)

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Low viscosity 100 % radiation curable formulations / Catherine Leroy in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4535 (04/2009)  

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Mechanical property changes and degradation during accelerated weathering of polyester-urethane coatings / allen Skaja in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

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Model for the effects of water on the cationic UV-Curing of cyclohexyl epoxides / Mark D. Soucek in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 937 (02/2003)

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Scratch resistance behavior of model coating systems / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 904 (05/2000)

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Surface rearrangement of tailored polyurethane-based coatings / Mariëlle Wouters in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)  

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Synthesis of amino coataining siliconised epoxy / Lluis Justo in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4533 (02/2009)  

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UV-PUDs for topcoats / Xavier Deruyttere in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4537 (06/2009)  

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VOC protocols and high solid acrylic coatings / Dipak K. Chattopadhyay in PAINTINDIA, Vol. LI, N° 10 (10/2001)

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