Titre : |
Development of ultra low bake stoving monocoat for industrial OEM application |
Type de document : |
texte imprimé |
Auteurs : |
Sulav Seth, Auteur |
Année de publication : |
2023 |
Article en page(s) : |
p. 54-68 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Automobiles -- Revêtements:Automobiles -- Peinture Bilan des émissions de gaz à effets de serre Catalyse Composés organiques volatils Copolymère mélamine-Formaldéhyde Dépôt électrolytique Haut extrait sec Matériaux -- Cuisson Polyacryliques Polyesters Réticulants Revêtement monocouche Thermodurcissables
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Three eco-friendly solutions are prominent in coating industry especially in the field of Automotive coating. In Indian context, water based coatings are not feasible for its cost & other operational issues, thus it is limited to CED application only. High solid coatings are the next alternate & it is gaining popularly for reduced VOC emission without compromising the physical & chemical properties of the coatings. Simultaneously all OEM manufacturers are seeking solutions for low bake coatings to restrict energy consumption in the curing process which will reduce carbon footprint in the whole supplychain.
When we talk about low bake coatings, reactivity & catalysis plays pivotal role in achieving results. Developing a low bake top coat has many challenges. Increased reactivity of the resin system often contributes to uncontrolled & incomplete reaction which is responsible for poor physical, chemical & weathering properties. Use of excess catalyst also has an impact on Electrical Resistivity (ER) which is a very important application parameter for electrostatic spray application. Combination of catalysis & reactivity negatively impacts storage stability. Judicious selection of catalyst, its dose optimization, right combination of crosslinker resin, Base to crosslinker ratio is very important to get desired results. In the current research paper we will explore various aspects of low bake formulation ingredients & their effect on coating performance to develop a low bake glossy monocoat white which meets the performance requirements of commercial vehicle manufacturers. |
Note de contenu : |
- Technology feasibility in Indian market
- Material selection & development strategy : Thermosetting acrylic resin - Thermosetting polyester resin - Melamine formaldehyde resin - Type 1 MF resin - Type 2 MF resin - Type 3 MF resin - Low bake catalysts
- Paint preparation, application & property assessment : Paint preparation - Test panel preparation - Property assessment - Instruments for critical paint property assessment
- Experiments, results & discussion : Design of experiments - Paint parameters & flow of experiments
- Table 1 : Technology feasibility chart
- Table 2 : Standard specification of monocoat stoving glossy white top coat
- Table 3 : Design of experiments
- Fig. 1 : Cross linking reaction of acrylic & MF resin
- Fig. 2 : Methylolation reaction of melamine
- Fig. 3 : Condensation& polymerization of ethylol amines
- Fig. 4 : Imino type MF resin
- Fig. 5 : HMMM type MF resin
- Fig. 6 : Etherified polymeric Mf resin
- Fig. 7 : Relative strength of acid catalyst
- Fig. 8 : Baking window of ultra low bake mono coat white |
En ligne : |
https://drive.google.com/file/d/1H4Xo4dpQD7p_RRc7xWktM0bfln7lR4cz/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40727 |
in PAINTINDIA > Vol. LXXXIII, N° 11 (11/2023) . - p. 54-68