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Use of cellulose esters as rheology additives for automotive OEM clearcoats / Jianhui Zhou in COATINGS TECH, Vol. 9, N° 6 (06/2012)
[article]
Titre : Use of cellulose esters as rheology additives for automotive OEM clearcoats Type de document : texte imprimé Auteurs : Jianhui Zhou, Auteur ; Brian King, Auteur ; Kevin W. McCreight, Auteur ; Josh Seeley, Auteur Année de publication : 2012 Article en page(s) : p. 28-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Epaississants
Esters de cellulose
Vernis -- AdditifsIndex. décimale : 667.7 Cires, laques, vernis Résumé : Automotive coatings have witnessed a definite transition to greener technologies over the past decade. Paint lines are being built or retrofitted for consolidated paint processes, with the intent to reduce energy consumption and operating cost. Specific to automotive clearcoats, there is a move to a one-pass application and a continuing shift to higher solids clearcoats. Consolidated paint processes require a clearcoat with improved strike-in resistance, better flow/leveling, and "filling" power to cope with telegraphing from imperfect substrates. One-pass application requires a clearcoat with an improved sag/flow balance. This article illustrates the improved appearance achieved by the use of cellulose ester rheology additives, alone or in combination with other rheology modifiers, in automotive OEM 1K clearcoats. Electrostatic rotary bell application was utilized to assess clearcoat appearance. Flow and leveling were characterized by a BYK Wavescan Dual. the viscoelastic behavior of clearcoats during the film drying process was investigated using a novel rheological technique, and the speed of solvent release was monitored using thermogravimetric analysis (TGA). Note de contenu : - USE OF CELLULOSE ESTERS AS RHEOLOGY ADDITIVES FOR AUTOMOTIVE OEM CLEARCOATS : Impact of cellulose esters on the appearance of OEM clearcoats - Natural weathering of OEM clearcoats - Impact of cellulose esters on the drying behavior of automotive OEM clearcoats En ligne : https://drive.google.com/file/d/1JQOxn0yLv4F87dbvdRyEvOYirsIufPPJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15570
in COATINGS TECH > Vol. 9, N° 6 (06/2012) . - p. 28-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14016 - Périodique Bibliothèque principale Documentaires Disponible User friendly steel protection / Andrew Cockcroft in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 193, N° 4469 (10/2003)
[article]
Titre : User friendly steel protection Type de document : texte imprimé Auteurs : Andrew Cockcroft, Auteur Année de publication : 2003 Article en page(s) : p. 32-36 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements
Métaux -- Revêtements poudre
Primaire (revêtement)Index. décimale : 667.9 Revêtements et enduits Résumé : A new single application powder system can shave significant process costs in the coating of galvanised steel, writes by the author. Note de contenu : - Zinc potential
- Differentiation
- Powder challenge
- TABLES : 1. List of powder zinc primers tested using hot neutral salt spray (ASTM B117) to 3000 hours and supported with natural exposure testing - 2. Creep figures once coating systems tested have been sprayed with hot neutral salt spray (HNSS ASTM B117) up to 3000 hours - 3. Powder primer performance is tested using natural exposure over 17 months at the Blyth coast test sitePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27828
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 193, N° 4469 (10/2003) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000308 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Using beer's law to model : Percent transmittance of multilayer composite coatings Type de document : texte imprimé Auteurs : Don Campbell, Auteur ; Antonette Saint-Pierre, Auteur Année de publication : 2010 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements
Lumière -- Absorption
Photostabilité
Primaire (revêtement)
Revêtements -- Finition
Revêtements multicouches
TransmittanceLa transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie.
En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie.Index. décimale : 667.9 Revêtements et enduits Résumé : Transmission of light through automotive topcoat and primer layers can lead to degradation of the underlying electrocoat layer and to topcoat delamination. To protect against this, it is critical that transmission of both ultraviolet wavelengths and certain visible wavelengths be effectively blocked by the topcoat and primer layers. The clearcoat, basecoat, and primer each have their own role and combine to protect against light transmission. The transmittance of these combined layers is typically measured by the Integrating Sphere UV-Visible Spectrophotometer. It would both simplify measurement of the topcoat systems and allow better system modeling if these layers could be measured separately and combined using Beer's Law to obtain the transmittance of the total topcoat system. Although some automotive pigments function by reflecting or scattering, we demonstrate here that log-linear models similar to Beer's Law for absorption can still be used to combine these layers and interpolate the effect of individual layer thickness on the total topcoat transmittance. En ligne : https://drive.google.com/file/d/1iQpcBcwSpPc1qLR_Q52vfyoc7zkABMwi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40645
in COATINGS TECH > Vol. 7, N° 6 (06/2010) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012300 - Périodique Bibliothèque principale Documentaires Disponible UV cure automotive refinish : clearcoats and primers at the speed of photons / Michael J. Dvorchak in COATINGS TECH, Vol. 19, N° 9 (11-12/2022)
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Titre : UV cure automotive refinish : clearcoats and primers at the speed of photons Type de document : texte imprimé Auteurs : Michael J. Dvorchak, Auteur Année de publication : 2022 Article en page(s) : p. 24-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Automobiles -- Vernis
Formulation (Génie chimique)
Primaire (revêtement)
Revêtement monocomposant
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements bi-composant
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Over the past decade, the automotive-refinish industry has been forced to look at innovative technologies to reduce volatile organic compound (VOC) content and hazardous air pollutants (HAPs) while providing a rapid return to service of the consumer's vehicle.
UV-A-cured one-component (1K) autorefinish primers were first introduced in the mid-1990s. UV-A clearcoats were subsequently introduced in the late 1990s.
Materials have continued to be developed and pushed to mimic the classic two-component (2K) solvent-based polyurethanes (PURs) ; however, slow acceptance by the auto-refinish market over the past two decades is indicative of a market that is difficult to change.
The automotive-refinish coatings market is forecast to surpass U.S. $6.3 billion globally in 2021. This market is expected to increase by 5.4% CAGR between 2021 and 2031. The main technology types are solventborne, waterborne, and UV cure.
The classic coating layers are primers, basecoats, topcoats, and clearcoats. A specific parameter in the refinish area that must be addressed is the bottleneck of a 2-hour cure for the primer before it can be sanded. Current UV-cure primers can be sanded within 2 minutes. The need to lower VOCs and volatile HAPs (VHAPs) is among the current constraints for all technologies. A hurdle that was recently cleared in the UV-cure sector is the price barrier for UV light equipment. Reports for the market have UV LED units priced under $1,000.2 This market continues to consolidate and will be required to decrease refinishing speeds to remain competitive.
This article will review the history of the UV-cured 1K and 2K auto-refinish market and formulations for primers and clearcoats. It will also attempt to look at current UV-cured 1K and 2K auto-refinish primers and clearcoats in the global market, new formulations, and new developments in UV equipment.Note de contenu : - CHANGES IN THE AUTOMOTIVE OEM AND REFINISH MARKETS
- INTRODUCTION OF UV-A-CURABLE AUTO REFINISH : Early attempts to develop a UV refinish clearcoat - Early patents on UV-A cure auto-refinish primers - Automotive OEM technical paper on UV auto-refinish clearcoats
- PRODUCTION AND INNOVATION IN THE MARKET : Combinatorial chemistry approach to identify the best non-air-inhibited formulation - Mimicking a 2K polyurethane clearcoat with a 1K-A-cure clearcoat via Tg values - 2K UV-A-curable clearcoat that uses a photo latent amine catalyst - 1K and 2K UV-A-curable clearcoat - 1K UV-A clearcoat and primer field study to evaluate long-term performance - Current RADTECH automotive refinish project - Continued development of a 1K UV-A cure clearcoat
- TODAY'S UV-A CURE LIGHT SOURCES FOR THE 1K UV-A-CURE AUTOMOTIVE-REFINISH MARKET
- FORECAST FOR THE UV-A-CURABLE REFINISH MARKET
- NUMEROUS TECHNIQUES HAVE BEEN USED TO MITIGATE OXYGEN INHIBITION
- Table 1 : Methods to mitigate oxygen inhibition showing advantages and disadvantages
- Table 2 : Concept of matching the Tgs of traditional 2K clearcoat with a UV-A-cure clearcoat
- Table 3 : The relationship of cure for the systems tested with pendulum hardness, reported in seconds
- Table 4 : Current automotive refinish UV-A products in the market
- Table 5 : Current UV light sources available to tha automotive industryEn ligne : https://drive.google.com/file/d/1gQnzdJrkq6O-eG3SrHqeCakEFjpIbBmk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38534
in COATINGS TECH > Vol. 19, N° 9 (11-12/2022) . - p. 24-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23758 - Périodique Bibliothèque principale Documentaires Disponible Vers des polymères autoréparants / Cécile Michaud in LA RECHERCHE, N° 430 (05/09)
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Titre : Vers des polymères autoréparants Type de document : texte imprimé Auteurs : Cécile Michaud, Auteur Année de publication : 2009 Article en page(s) : p. 26 Note générale : Bibliogr. Langues : Français (fre) Catégories : Automobiles -- Entretien et réparations
Automobiles -- Revêtements:Automobiles -- Peinture
Polymères -- Effet du rayonnement ultraviolet
Polymères autoréparants
RayuresIndex. décimale : 668.9 Polymères Résumé : Des chimistes américains ont conçu un polymère capable de réparer de légères dégradations sous l'effet d'un rayonnement ultraviolet. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5898
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Code-barres Cote Support Localisation Section Disponibilité 011260 - Périodique Bibliothèque principale Documentaires Disponible Vers la réduction des dépenses d'énergie / Clément Delorme in DOUBLE LIAISON, N° 596 (01/2014)
PermalinkA versatile, high-performance polyol chemistry for broad industrial market use / Jamie Dziczkowski in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4646 (11/2018)
PermalinkPermalinkWater-thinnable coatings / Ganesh Datt Bajpai in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4524 (05/2008)
PermalinkWaterborne 2K polyurethane topcoats / Cédric Le Fevere de Ten Hove in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4584 (05/2013)
PermalinkWaterborne : a different animal, part 2 / Clifford K. Schoff in COATINGS TECH, Vol. 10, N° 2 (02/2013)
PermalinkWear resistance evaluation method of painting LADA cars / S. E. Pavlihkin in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/01 (01-02/2001)
PermalinkWhite is the global number one colour choice when it comes to choosing cars in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4638 (02/2018)
PermalinkWonders of reduced phenolic resin / Mukund Hulyalkar in PAINTINDIA, Vol. LXI, N° 12 (12/2011)
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