| Titre : |
Hybrid low modulus sealants - minerals for performance enhancement and process optimisation |
| Type de document : |
texte imprimé |
| Auteurs : |
Shamila Grigorieff, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 29-30 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Formulation (Génie chimique)
Mastics
Mastics -- Propriétés mécaniques
Mastics -- Propriétés optiques
Matériaux hybrides
Polymères à silane modifié
Rhéologie
Stabilité au stockage
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Silane-modified polymers are claimed to combine the strength of polyurethanes with the weathering resistance of silicones. In addition to their high performance properties, these hybrid polymers are achieving popularity due to their solvent-free and isocyanate-free nature. Sealants based on hybrid polymers also provide good over paintability, stain resistance and excellent primerless adhesion to a wide range of substrates.
In silane-modified sealants the mineral component can represent more than 60wt % of a commercial formulation. The choice of mineral will, therefore, have an impact on the processing and ultimate performance of the sealant. This paper evaluates the performance of minerals in such sealants. Specifically, the effects of coated ground calcium carbonates on its stability, rheology and mechanical properties are reported. The potential impacts on the process route are discussed in parallel. The results demonstrate that the sealant production processes can be simplified and the properties improved through selection and control of the physical properties of the mineral. |
| Note de contenu : |
- Table 1 : Formulation details
- Table 2 : GCC typical properties
- Table 3 : Optical and mechanical properties of the sealant after seven days storage at 23°C
- Table 4 : Moisture scavenger contents used & storage stability
- Fig. 1 : Viscosity profiles of the sealant after seven days storage at 23°C
- Fig. 2 : Moisture pick-up of the different GCC grades |
| En ligne : |
https://drive.google.com/file/d/1Y35eFQsP6wO6dVL8_KmLC0tv8XD_aqDo/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34452 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4664 (09/2020) . - p. 29-30
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Hybrid low modulus sealants - minerals for performance enhancement and process optimisation in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4664 (09/2020)
