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Assessment of various analytical techniques on naturally weathered paints as a predictor of long-term gloss retention for waterborne acrylic architectural paints / Matthew S. Gebhard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)
[article]
Titre : Assessment of various analytical techniques on naturally weathered paints as a predictor of long-term gloss retention for waterborne acrylic architectural paints Type de document : texte imprimé Auteurs : Matthew S. Gebhard, Auteur ; Michael B. Clark, Auteur ; Kenneth. F. Willey, Auteur ; Robert F. Antrim, Auteur ; Francis V. Acholla, Auteur ; John B. Newman, Auteur ; Kristin Weidemaier, Auteur Année de publication : 2006 Article en page(s) : p. 15-27 Note générale : bibliogr. Langues : Américain (ame) Catégories : Colloides
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Formulation (Génie chimique)
Latex
Polyacryliques
Revêtements -- Analyse:Peinture -- Analyse
Revêtements décoratifs:Peinture décorative
Revêtements en bâtiment -- Détérioration:Peinture en bâtiment -- Détérioration
Revêtements en phase aqueuse:Peinture en phase aqueuse
Revêtements organiquesIndex. décimale : 667.6 Peintures Résumé : Gloss retention of waterborne acrylic architectural paints is one of many properties defining exterior durability. Assessing gloss retention is a time consuming process, and accelerated weathering protocols (Weather-Ometer®) typically have poor correlation with natural exposures for this class of paints. The recent development of new analytical techniques for assessing automotive paint durability raises the possibility of detecting subtle changes in short-term natural exposures that would be predictive of long-term gloss retention; however, extension to architectural paints has yet to be demonstrated. To test the concept, seven paints based on different aqueous emulsion polymers were exposed to natural weathering at the same time for 12 weeks at the Paint Quality Institute (PQI) test site, and were then examined using scanning probe microscopy, optical profilometry, chemiluminescence, XPS, and FTIR. These paints were also exposed for 1000 hr in a Weather-Ometer (WOM). Scanning probe microscopy, optical profilometry, chemiluminescence, FTIR, and the WOM results all showed poor correlation with 96-week natural exposure at the PQI test site. The lack of correlation for the WOM results emphasizes the crucial importance of using natural weathering to assess gloss retention. In contrast, the XPS shows some promise for qualitatively predicting subsequent gloss loss and appears worthy of further exploration. As employed here, the XPS was used to monitor the ratio of pigment (Al, Si, and Ti) to carbon coming from the TiO2 in the top few nanometers of the paint surface. A correlation (R2 = 0.731) was found between gloss retention after 96 weeks and the change (2 versus 12 weeks of exposure) in pigment to carbon ratio. This correlation is probably sufficient to rank a series of paints and allow for an assessment against well-established controls. While promising, XPS has some issues. Surface contamination, equipment expense, the considerable expertise required, and precision make utility for screening less than ideal. Note de contenu : - GLOSS RETENTION
- ALTERNATIVE APPROACH TO PREDICTING GLOSS RETENTION
- APPROPRIATE ANALYTICAL METHODS FOR ASSESSING COATING DEGRADATION : Scanning probe microscopy - Optical profilometry - Chemiluminescence - Photoacoustic spectroscopy - X-ray photoelectron spectroscopy
- ASSESSMENT PROTOCOL
- EXPERIMENTAL DETAILS : Paint formulations
- Gloss measurements - Scanning probe microscopy - Optical profilometry - Chemiluminescence - Photoacoustic spectra - X-ray photoelectron spectroscopy
- RESULTS AND DISCUSSION : Gloss - Weather-ometer - Surface topography - Chemiluminescence - PAS - XPS
- Table 1 : Paint formulatio used to prepara paints using the seven emulsion polymers
- Table 2 : Initial 60° gloss values for the paints based on the seven latex emulsion polymers
- Table 3 : PAS-FTIR parametersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3709
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 15-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003762 - Périodique Bibliothèque principale Documentaires Disponible Attributing the crosslinking density to water vapor transmission rate of an acrylic-melamine automotive clearcoat / M. Nasirzadeh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Attributing the crosslinking density to water vapor transmission rate of an acrylic-melamine automotive clearcoat Type de document : texte imprimé Auteurs : M. Nasirzadeh, Auteur ; H. Yahyaei, Auteur ; S. M. Lashgari, Auteur ; Mohsen Mohseni, Auteur Année de publication : 2021 Article en page(s) : p. 239-246 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermomécanique dynamique
Angle de contact
Caractérisation
Copolymère acrylique mélamine
Densité
Dureté (matériaux)
Formulation (Génie chimique)
Résistance chimique
Réticulation (polymérisation)
Transmission de vapeur d'humidité
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the effect of crosslinking density of an acrylic-melamine clearcoat on water vapor transmission rate was evaluated. Four types of acrylic resins with different OH contents were used as the main polymeric backbone of the acrylic-melamine clearcoat. Also, three different acrylics to melamine–formaldehyde ratios were used in the coating formulations to obtain various crosslinking densities. It was observed that other film properties such as surface hydrophilicity and molecular homogeneity had a crucial impact on the clearcoat water vapor transmission rate together with the crosslinking density. Surprisingly, results showed that samples with acrylic resin with less OH content and lower melamine–formaldehyde crosslinker had the lowest water vapor transmission rate among other samples. These results were in agreement with the water contact angle and the data deduced from dynamic mechanical thermal analysis (DMTA) results of clearcoats. Note de contenu : - EXPERIMENTAL : Materials - Preparation of acrylic-melamine clearcoat
- CHARACTERIZATION
- RESULTS AND DISCUSSION
- WATER CONTACT ANGLE : ATR-FTIR results - Solvent resistance - The hardness of the clearcoats - Dynamic mechanical thermal properties (DMTA) - Water vapor transmission rate
- Table 1 : The composition of clearcoats
- Table 2 : Water contact angle with clearcoats (degree)
- Table 3 : The hardness results (with standard deviation) of the clearcoats
- Table 4 : The crosslink density of the clearcoats calculated with storage modulus in rubber plateau
- Table 5 : The homogenity data obtained from loss tangent graphs
- Table 6 : Water vapor transmission, grams per square meter per 24hDOI : https://doi.org/10.1007/s11998-020-00400-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00400-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35366
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 239-246[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Auto-deposition coating Type de document : texte imprimé Auteurs : Vikesh Kumar Singh, Auteur ; Ajay Chaurasiya, Auteur Année de publication : 2017 Article en page(s) : p. 117-130 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides carboxyliques
Ateliers de peinture industrielle -- Nettoyage
Autodéposition chimique
Dépôt électrolytique
Dioxyde de titane
Formulation (Génie chimique)
Miniémulsions
Oléique, AcideL'acide oléique vient du latin oleum et veut dire huile. C'est le plus abondant des acides gras monoinsaturés à chaîne longue dans notre organisme. Sa formule chimique brute est C18H34O2 (ou CH3(CH2)7CH=CH(CH2)7COOH). Son nom IUPAC est acide cis-9-octadécénoïque, et son nom court de lipide est 18:1 cis-9. La forme saturée de cet acide est l'acide stéarique.
On le symbolise par les nombres 18:1 pour indiquer qu'il possède 18 atomes de carbone et une liaison éthylénique. Pour indiquer la position de la double liaison, on préfère indiquer le nombre de carbones entre le dernier carbone (n° 18) et le carbone où commence la double liaison (n° 9), d'où 18 - 9, qu'on écrit n - 9, en désignant par n le nombre de carbones de la chaîne. L'acide oléique est donc un acide gras insaturé, plus précisément monoinsaturé.
La double liaison agit sur la forme de la molécule et des triglycérides qu’elle forme avec le glycérol. Comme la molécule ne peut pas pivoter autour de C = C, la chaîne est beaucoup moins flexible que l’acide stéarique et ne peut pas former de boule. Les molécules des esters de cet acide sont beaucoup moins compactes que la tristéarine: ces sont des huiles.
À la température de notre corps c'est un liquide (huile), qui ne se solidifie qu'à 13,4 °C.
Polymères -- Synthèse
Polymérisation
Résistance à l'hydrolyse
Séchage
VinyleIndex. décimale : 667.9 Revêtements et enduits Résumé : Auto-deposition is faster and more environmentally responsible than conventional coating processes; however, a typical seven-stage auto-deposition process still requires several cleaning stages. Recent advances are pushing auto-deposition technology past this boundary to offer manufacturers and coaters a coating solution that lowers the environmental impact even further, while also reducing the overall manufacturing production footprint and increasing efficiency in the assembly process. Note de contenu : - Comparison with ed coat
- A safer, more efficient process
- Higher performance with less environmental impact
- Continued advances
- Chemical concepts to back up auto-deposition
- Objectives behind invention
- Deposition mechanism : Iron dissolution - Deposition - Auto-deposition sequence - An auto-deposition bath contains
- Where it wets- it coats
- Final sealing rinse
- Curing
- Coating properties of typical auto-deposition systems
- Equipment considerations : Coating bath control parameters
- Formulating principles : Radical polymerization – Formulation basics – Acidic composition (aqueous - Alkaline composition
- These alkaline compositions are more suitable for the non steel surfaces typical compositions : Auto-deposition composition and process with acrylic terpolymer coating - The disperse resin comprising the organic coating-forming component in this composition is a polymer comprising
- Synthesis of a water based titanium dioxide polymer particles via mini-emulsion : Designing the synthetic route - Finding a stable precursor system
- Carboxylic acids as legands : Oleic acid : Acrylic and methacrylic acid
- General remark on the hydrolytic stability of alkoxide precursor molecule
- Hydrolytic stability within vinylic monomer mixture
- Formation of miniemulsion using oleic acid along with vinylic monomer system
- Modification using increased tio2 loading
- Polymerization process
- Drawbacks associatedEn ligne : https://drive.google.com/file/d/1aOIMQzuZj4o1pi6tkDabb_U6WYKqqhje/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29339
in PAINTINDIA > Vol. LXVII, N° 9 (09/2017) . - p. 117-130[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19295 - Périodique Bibliothèque principale Documentaires Disponible Automotive coatings formulation / Ulrich Poth / Hannover [Germany] : Vincentz Network GmbH & Co. (2008)
Titre : Automotive coatings formulation : Chemistry, physics und practices Type de document : texte imprimé Auteurs : Ulrich Poth, Auteur Editeur : Hannover [Germany] : Vincentz Network GmbH & Co. Année de publication : 2008 Collection : European Coatings Tech Files Importance : 237 p. Présentation : ill. Format : 27 cm ISBN/ISSN/EAN : 978-3-86630-904-3 Prix : 167 E Note générale : Index - Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Formulation (Génie chimique)
Revêtement en plastiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Very few objects capture the public interest as much as automobiles. In practice, automobiles are means of transporting persons and goods. And therein lies the particularity of this form of transportation – its individuality, which is very much in vogue with current ideas. Individual mobility is often linked to the individual appearance of objects, and automobiles are no different in this regard. Popular tastes in automobiles vary enormously. Some people like to drive very prestigious cars, others prefer sporty cars, or cars which "look different" – and there are many different tastes in between. The whole appearance of automobiles is dictated by the shape of the car body and its accessories, and not least by the surface impression created by the coatings. Makers of cars and coating materials spend a lot of effort on generating particularly appealing car surfaces. These include optimising resistance to weathering, corrosion, chemicals and mechanical impact. The most important target is to preserve the appearance as long as possible, ultimately over the vehicle’s life-time.
The formulation and composition of coating materials depend on the requirements of processes of different industrial application methods. Therefore, automotive coating systems are a special class of industrial coating systems. That is why some paint producers specialise in the development and production of automotive paints. Although criticism has been levelled at ever increasing production levels (e.g. due to rising emissions of carbon dioxide), it must nonetheless be borne in mind that producers of coating systems for automotive applications pioneered the development and introduction of environmental paint systems. Currently the most important target is to avoid hazardous compounds or to replace them, and to cut emissions of organic compounds during the production and application of paints. This book presents the results of such developments within the coatings industry. The development and production of automotive coatings is not the preserve of paint producers only. Suppliers of raw materials also participate in the developments and improvements. These include major chemical companies who produce basic raw materials, and producers of specialty chemicals, polymers for coatings, pigments, and additives. Makers of application equipment contribute to the development process, too. The automotive industry itself is also interested in achieving optimum systems and processes. Some companies therefore expend a great deal of effort on researching and developing coating systems.
This book is directed at persons who are involved in those sectors of industry which are related to the development, production, testing, marketing, supply of coatings raw materials, coating systems and application equipment. The information is addressed to chemists, physicists, engineers, and other persons with technical interests who are involved with coatings. Of course, another goal is to educate persons who are working their way into the technology. In addition, the book is directed at persons who are mainly involved in the application processes, but would like to know more about coating systems.Note de contenu : - GENERAL ASPECTS OF COATINGS : Composition of paints - Application form - Film forming - Production process - Application methods - Coating systems
- AUTOMOTIVE OEM COATINGS : History of automotive coatings - Automotive coatings as a multilayer system - Application processes for automotive coatings - Pre-treatment and primers - Primer surfacers - Topcoats - Basecoats - Clearcoats - Reductions in solvent emissions
- REPAIR COATINGS : Surfaces and treatments - Primers - Primer surfacers - Putties - Topcoats - Basecoats - Clearcoats
- PLASTIQUES COATINGS FOR AUTOMOBILES : Coatings for interior parts - Coatings for attached parts
- COATINGS FOR HEAVY LOADERPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3144 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 2544 667.9 POT Monographie Bibliothèque principale Documentaires Sorti jusqu'au 20/05/2024
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Titre : Automotive stoving enamels Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2023 Article en page(s) : p. 100-102 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Formulation (Génie chimique)
Matériaux -- Cuisson
Revêtement émail:Peinture-émail
Revêtements -- Finition:Peinture -- FinitionIndex. décimale : 667.9 Revêtements et enduits Résumé : Stoving enamel is a paint that is sprayed on metal surface and cured at a high temperature, it is designed to give a substrate a good finish, gloss, and color retention. Hence stoving enamel is a balanced formula blended with top quality resins, selective additives and highly durable pigments which imparts its exceptional color retention, high gloss and smooth finish coupled with film flexibility, hardness and solvent resistance. Therefore it is used in the automotive industry, and can also be used on steel furniture, control panels, machinery, and medical equipment. Note de contenu : - Two component car repair coating (blue color) : Raw material suppliers details
- White topcoat for thick layer application : Preparation of binder solution - Total - Properties of white topcoat - Raw material suppliers detailsEn ligne : https://drive.google.com/file/d/1a77etGSSqQvDxlyJbOhyhNZoEUp_GBy4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40743
in PAINTINDIA > Vol. LXXXIII, N° 12 (12/2023) . - p. 100-102[article]Réservation
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