This document specifies the general procedure to be followed in determining the dynamic viscosity of unpigmented coating materials, such as paints, varnishes and related products, as well as binders at a shear rate range between 9 000 s−1 and 12 000 s−1. It describes an absolute viscosity measurement with cone-plate measuring geometry at high shear rates.The measured value gives information about the resistance offered by the material to brushing, spraying and roller coating during application.The method specified in this document is suitable for all paints and varnishes whether they are Newtonian in behaviour or not. For materials containing dispersions of large particles, the measuring geometry is expected to be adapted.
This document specifies the general procedure to be followed in determining the dynamic viscosity of unpigmented coating materials, such as paints, varnishes and related products, as well as binders at a shear rate range between 9 000 s−1 and 12 000 s−1. It describes an absolute viscosity measurement with cone-plate measuring geometry at high shear rates.
The measured value gives information about the resistance offered by the material to brushing, spraying and roller coating during application.
The method specified in this document is suitable for all paints and varnishes whether they are Newtonian in behaviour or not. For materials containing dispersions of large particles, the measuring geometry is expected to be adapted.
La présente partie de l'ISO 2884 fait partie d'une série traitant de l'échantillonnage et de l'essai des peintures, vernis et produits assimilés. Elle s'ajoute à l'ISO 2431:1993, Peintures et vernis — Détermination du temps d'écoulement au moyen de coupes d'écoulement. Elle spécifie la méthode générale à suivre pour déterminer la viscosité dynamique des peintures, vernis et produits assimilés à un gradient de vitesse compris entre 9 000 s?1 et 12 000 s?1. La valeur obtenue donne des informations sur la résistance du produit à la brosse, aux pulvérisations et à l'application au rouleau pendant l'application. La méthode spécifiée dans la présente partie de l'ISO 2884 convient pour toutes les peintures et vernis, à comportement newtonien ou non. Si les produits contiennent des particules de grande taille, les résultats seront faussés.
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