| Titre : |
Next generation of thickeners in industrial coatings & construction systems |
| Type de document : |
texte imprimé |
| Auteurs : |
Rajni Gupta, Auteur ; James Heck, Auteur ; Yanhui Chen ; Mihai Polverejan ; David Marsh ; Wouter Ijdo ; Carlos Feito ; Elke Piron ; Rick Lin ; Tien Hsu ; Angel Lee |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 16-24 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colles:Adhésifs
Epaississants
Epoxydes
Formulation (Génie chimique)
Huile de ricin et constituants
Mélanges (chimie)
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Revêtements -- Additifs
Revêtements bi-composant
Rhéologie
Urethanes
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The rheological properties of an industrial coating, adhesive or sealant are vital to its success. A well formulated industrial coating, adhesive or sealant has balanced rheological properties, easy but controlled application, good Sag or slump resistance and storage stability. The thickeners incorporated in the coating, adhesive or sealant formulations provide the ma nufacturers with the a bi lity to design the rheological characteristics they need fora specific end use. Organic thixotropes are castor oil or polyamide-based materials that are especially useful in systems, such as industrial coatings, construction sealants, caulks, adhesives and mastics. These additives provide outstanding efficiency for shear thinning, viscosity build, Sag control and pigment suspension. However, the high activation temperature is sometimes a deterrent for broader use. In this paper, we present a new generation of highly efficient organic thixotrope-based thickeners that can be activated at significantly lower temperatures. These new materials can be successfully incorporated in industrial coatings or sealant formulas for better viscosity build, Sag resistance and higher extrusion rates. They display a wider process window and require less energy and time in production which can result in lower costs. |
| Note de contenu : |
- ADVANCING POLYAMIDE THICKENER TECHNOLOGY : Polyamide thickener goals for improvement
- NEW POLYAMIDE THICKENER PERFORMANCE EXAMPLES IN INDUSTRIAL COATINGS : 90% high solids industrial 2K epoxy coating sag resistance - 77% solids industrial 2K urethane coating sag resistance
- EXPERIMENTS DEMONSTRATING ACCOMPLISHMENT OF THE NEW POLYAMIDE THICKENER GOALS : Low temp and moderate mixing speed : 85°F mixing of a 77% solids industrial 2K urethane coating - Low temp and very low mixing speed : 85°F mixing of a 90% solids industrial 2K epoxy coating
- 100% SOLIDS ADHESIVE -EFFECTIVENESS OF NEW POLYAMIDES IN MS POLYMER FORMULATION
- Fig. 1 : Schematic of hydrogenation of castor oil to produce a castor wax
- Fig. 2 : Diagram of castor wax based organic thickener material changes occurring during the coating preparation mixing process
- Fig. 3 : Generic molecular structure of a polyamide organic thickener
- Fig. 4 : A) possible hydrogen bonds between molecules of polyamide thickeners ; B) an SEM micrograph of a collection of polyamide fibrils |
| En ligne : |
https://drive.google.com/file/d/1HrxDdxfAflFWJOYvJs31qRJLXsBQfxbQ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31020 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4644 (09/2018) . - p. 16-24
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