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Interfacial studies of crosslinked urethanes : Part III. Structure-property relationships in polyester waterborne polyurethanes / M. W. Urban in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 888 (01/1999)
[article]
Titre : Interfacial studies of crosslinked urethanes : Part III. Structure-property relationships in polyester waterborne polyurethanes Type de document : texte imprimé Auteurs : M. W. Urban, Auteur ; C. L. Allison, Auteur ; C. C. Finch, Auteur ; B. A Tatro, Auteur Année de publication : 1999 Article en page(s) : p. 75-85 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie des surfaces
Cinétique chimique
Couches minces
Fourier, Spectroscopie infrarouge à transformée de
Interfaces (Sciences physiques)
Polyaddition
Polyesters
Polyurée
Polyuréthanes
Réactions chimiques
Réticulation à l'humidité
Revêtements en phase aqueuse:Peinture en phase aqueuse
Spectroscopie de réflectanceIndex. décimale : 667.9 Revêtements et enduits Résumé : These studies examine crosslinking reactions of polyurethanes (PURs) using attenuated total reflectance Fourier-transform (ATR FTIR) spectroscopy and show that higher relative humidity (RH) accelerates the crosslinking reactions leading to the formation of polyurethane and polyurea. Concentration levels of unreacted isocyanate (NCO) are greater at the film-air (F-A) interface than the film-substrate (F-S) interface. In contrast to the previous studies on polyacrylate emulsion urethanes, no stratification was detected between 0.65 to 1.14 um near the F-A and F-S interfaces. This behavior is attributed to equivalent weight differences, 3100 g/eg for polyacrylate and 1140 g/eq for polyester. Solvent evaporation experiments show that approximately 10% of the initial water concentration remains in the film for extended periods of time, resulting in reactions leading to the fomation of urea near the F-S interface.Pur film formation occurs in two stages, a solvent vapor pressure controlled stage, followed by a diffusion controlled stage. The duration of each stage depends on several factors, including the amount of shear induced on the shear thinning waterborne urethanes, which subsequently affects the exposure of isocyanate aggregates to water. Increased RH significantly affects structure-property relationships of waterborne PURs due to urea formation, which alters the glass transition temperature, storage modulus, crosslink density, and film hardness. Note de contenu : - EXPERIMENTAL : Sample preparation - Analytical methods Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17816
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 888 (01/1999) . - p. 75-85[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003557 - Périodique Bibliothèque principale Documentaires Disponible 009602 - Périodique Bibliothèque principale Documentaires Exclu du prêt
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Titre : On-the-spot adhesives Type de document : texte imprimé Auteurs : Anton Brandmair, Auteur ; Andreas Dobmann, Auteur ; Sebastian Meyer, Auteur ; Willi Schwotzer, Auteur ; Patrick Steiner, Auteur Année de publication : 2012 Article en page(s) : p. 24-27 Langues : Multilingue (mul) Catégories : Assemblages collés
Collage
PolyuréeIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Ultrafast assembly technology - A new arrival on the market is a joining process that combines the advantages of adhesive bonding with those of mechanical joining technologies. This new process is based on an adhesive that has a long and variable open time but which can be cured very quickly. Note de contenu : - The dilemma in adhesive bonds
- Non-invasive yet with pushbutton convenience
- Solution strategies
- Join first, then bond
- High-pressure mixing
- Systemic limits
- Optimization of manufacturing processes
- Example 1 : in-situ cast dowels
- Example 2 : in-situ cast assembly clipsEn ligne : https://drive.google.com/file/d/1TS6_CPir9fzvNTXvsCKXuB6tGeS05XVj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15063
in ADHESION - ADHESIVES + SEALANTS > N° 1/2012 (2012) . - p. 24-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13768 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : One surface, three effects : A combined injection molding and reaction process generates high gloss, depth and structure in one operation Type de document : texte imprimé Auteurs : Jochen Mitzler , Auteur ; Matthias Dykhuis, Auteur ; Steffen Reuter, Auteur ; Daniel Schelter, Auteur Année de publication : 2014 Article en page(s) : p. 41-44 Langues : Anglais (eng) Catégories : Brillance (optique)
Laque et laquage
Matières plastiques -- Moulage par injection
Matières plastiques -- Revêtement:Matières plastiques -- Peinture
Matières plastiques -- Vernis
Polyurée
Polyuréthanes
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 668.4 Plastiques, vinyles Résumé : One-shot manufacturing of injection molded parts with high-gloss hard lacquer coatings, sophisticated depth effects or structured surfaces with a convincing tactile effect is no longer just a vision. After several years of development work, a project aimed at vehicle interiors is showing that the "ColorForm" process allows these aims to be met with virtually zero rejects and at favorable costs. Note de contenu : - Specification derived from a market analysis
- Release-agent-free combination of thermoplastic and PU lacquer
- Multicolor parts in one Shot
- Hitherto unfeasible effect combinations
- No reason for complaintEn ligne : https://drive.google.com/file/d/1nVNoY19f-7zq7IIl3AdP9CQd_j27XO9F/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22324
in KUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 9 (09/2014) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16514 - Périodique Bibliothèque principale Documentaires Disponible Polyaspartic : a revolutionary coating technology / Brijesh Mishra in PAINTINDIA, Vol. LXI, N° 6 (06/2011)
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Titre : Polyaspartic : a revolutionary coating technology Type de document : texte imprimé Auteurs : Brijesh Mishra, Auteur Année de publication : 2011 Article en page(s) : p. 57-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diisocyanate de diphénylméthane
Durée de vie en pot
Epoxydes
Isocyanates
Polyaspartiques
Polyurée
Polyuréthanes
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : The name polyaspartic is becoming more recognyzable among formulators, specifiers, and applicators in the coatings industry to differentiate it from polyurea and polyurethanes. Polyaspartic coating is a recent development in the polyurethane coatings industry. Two main application areas are reaction injection moulding (RIM) and sprayable coatings.
Polyaspartic coatings combine extreme application properties such as rapid cure (even at temperatures well below 0°C) and intensitivity to humidity to exceptional physical properties such as high hardness, flexibility, tear and tensile strength, and chemical and water resistance. The result is good weathering and abrasion resistance. The systems are 100 % solids, making them compliant with strictest VOC regulations. Due to its specific curing profile and exceptional film properties, the polyaspartic coating technique developed into various areas, including corrosion protection, containment, membranes, linings and caulks, polyaspartic coatings increase the productivity and reduc the overall cost.Note de contenu : - History of polyaspartics coatings chemistry
- Chemical reactions
- Curing characteristics
- Polymer film properties
- Properties of polyaspartic coatings
- Low VOC level
- Application properties
- Application techniques
- What makes polyaspartic unique ?
- Applications : Rail cars - Bridges - Concrete - Tunnels - Light poles - Wood floorsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11849
in PAINTINDIA > Vol. LXI, N° 6 (06/2011) . - p. 57-64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013222 - Périodique Bibliothèque principale Documentaires Disponible Polyurea coatings and its versatile nature / Mukesh Kathalewar in PAINTINDIA, Vol. LXI, N° 8 (08/2011)
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Titre : Polyurea coatings and its versatile nature Type de document : texte imprimé Auteurs : Mukesh Kathalewar, Auteur ; Amey Bhogale, Auteur ; Suraj Mare, Auteur Année de publication : 2011 Article en page(s) : p. 67-75 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Elastomères
Polyurée
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurea is an elastomer that is obtained by mixing two reactive components : an isocyanates component and an amine component. Two-component polyurea elastomeric coating systems are the newest technology to the protective coating industry. Polyurea coatings give exceptional physycal properties such as high hardness, flexibility, tear and tensile strength, chemical and water resistance ; which are even better compared to polyurethane and epoxy coatings. A major advantage of polyurea coatings is the fact thay they set within a matter of seconds and take just a few hours to cure through. This allows surfaces coated with polyurea to be reopened for use without any limitations after just 24 hours. Unlike other spray coatings, polyurea systems can also be applied in humid and low-temperature outdoor conditions.
Polyurea systems are used as spray-applied protective or wear coatings in various industrial applications, for example in the construction of tanks and industrial buildings, roads and bridges, in hard landscaping and in interior fitting.Note de contenu : - POLYUREA CHEMISTRY : Raw materials - Aromatic based polyurea (1. Isocyanate - 2. Diluents) - Resin blend or amind blend side - Polyetheramines - Chain extenders - Aliphatic based polyurea - Additives - Isocyanate reaction with water - Diamine & carbonic acid derivative - Polyurea vs polyurethane - Epoxy vs polyurea - Development in polyurea (1. Polyaspartic ester based polyurea - 2. Silicone modified polyurea - 3. The use of UV stabilizers in aliphatic polyurea - 4. Polyurea using 2, 4'-MDI isocyanate isomers - 5. Colored polyureas - 6. Low-pressure applied polyurea) - Polyurea application - Polyurea addition - Myths - Application scope for polyurea (a. Building and construction - b. Infrastructure - c. Transport - d. Others). Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11873
in PAINTINDIA > Vol. LXI, N° 8 (08/2011) . - p. 67-75[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13282 - Périodique Bibliothèque principale Documentaires Disponible Polyurea "loose" liners / Kristin Leonard in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 31, N° 2 (02/2014)
PermalinkPolyurea : A revolution in coating technology / Santosh Kumar in PAINTINDIA, Vol. LVII, N° 7 (07/2007)
PermalinkPreparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings / Xinmeng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
PermalinkPermalinkA review on : CNSL based polyurethane, polyester and polyurea coatings / Sonam Saxena in PAINTINDIA, Vol. LXIX, N° 11 (11/2019)
PermalinkRing opening opens the path to easier-to-use polyureas in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/2010 (11/2010)
PermalinkSelf-crosslinkable urethanes and urethane/acrylics / Ronald Tennebroek in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/97 (11/1997)
PermalinkPermalinkSilica-embedded polyurea microspheres with rough surface for matte leather finishing / Liang Jia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 5 (05/2022)
PermalinkTitans of the abyss / Mike O'Donoghue in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 31, N° 1 (01/2014)
PermalinkTwo-component hybrid coating for roofs in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 8, N° 3 (2015)
PermalinkTwo-component mixing system successfully used on large-scale project / Wiwa Wilhelm Wagner in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 8, N° 1 (2015)
PermalinkWet work : space center boulevard storm sewer reconstruction / Michael Osborne in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 9 (09/2017)
PermalinkWhen a good idea goes bad / Rick A. Huntley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 3 (03/2013)
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