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A novel contribution to the modeling of the matting efficiency of aqueous polyurethane dispersions
Uribe, Julio; Graells Sobré, Moisès; Salgado, Juan
Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. CEPIMA - Centre d'Enginyeria de Processos i Medi Ambient
Gloss is a critical issue in many applications in the coating industry. Gloss depends on optical and rheological properties of complex mixtures, and estimating gloss from basic properties is still a challenge. In order to predict the gloss of an industrial thickened-to-application formulation this work presents a gloss-rheology semi empirical-modeling approach based on a gloss excess function and previous work from other authors. A new matt (low gloss) hybrid waterborne polyurethane dispersion composed out of a self-matting agent (A) and a traditional silica-based matting agent (B) has been studied, and the resulting gloss of the mixture has been correlated to pure component gloss values and dynamic viscosity at medium shear rate. Several modeling options have been tested and their goodness of fit has been determined. The most promising options have been selected and validated towards untrained data sets.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria química
Polymerization
PUD
Gloss
Self-matt
Property modeling
Polymer physics
Polimerització
info:eu-repo/semantics/publishedVersion
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