[article]
| Titre : |
Thickening by thinning - A novel liquid rheology additive for selvent-based and solvent-free coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Janos Hajas, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. XIX-XXI |
| Langues : |
Anglais (eng) |
| Catégories : |
Dilution
Epaississants
Revêtements -- Additifs:Peinture -- Additifs
Rhéologie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A new liquid rheology additive based on a modified urea was developed to solve rheology problems in solvent-based and solvent-free coatings. Its thickening mechanism can be explained by selective insolubility of the modified urea, which results in a controlled separation of fine, needle-like particles demonstrating strong cohesive interactions. The final result of such interactions is a three-dimensional network which improves the rheological properties. Anti-settling and sag control results, compared to results with conventional additives, will be presented in coatings formulations with various polarities. Formulations containing the modified urea thickener displayed very intense shear-thinning effects and high thixotropy levels. Results with various incorporation methods will be discussed. Recommendations for practical coatings applications will be provided along with detailed information about advantages, usage areas and side-effects. |
| Note de contenu : |
- Chemistry and method of action
- Rheology effects
- Application fields : solvent-based and solvent-free systems |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13321 |
in PAINTINDIA > Vol. XLVII, N° 10 (10/1997) . - p. XIX-XXI
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Thickening by thinning - A novel liquid rheology additive for selvent-based and solvent-free coatings in PAINTINDIA, Vol. XLVII, N° 10 (10/1997)
