Modification of rheological properties of a solventborne paint using additives
ČlánekOtevřený přístuppeer-reviewedpublishedDatum publikování
2005
Vedoucí práce
Oponent
Název časopisu
Název svazku
Vydavatel
Univerzita Pardubice
Abstrakt
The application properties of paints such as spreading and levelling properties, film thickness, sedimentation tendency and pigment stability are determined by the paint rheological behaviour. Sufficiently shear thinning, thixotropic paints with a yield point have, as a rule, suitable application properties. If the paint does not exhibit the required properties, its rheological behaviour may be improved using a proper type of rheological additive. In this work, the rheological properties of an acrylic paint (dispersion of TiO2 in a solution of acrylate copolymers), which behaves as a Newtonian liquid, have been modified using three different types of commercial additives. To evaluate the influence of additive adjuction, the flow curves, yield point, oscillation tests, and creep and recovery tests have been measured for the paint samples on the dynamic rheometer RS 150(Haake). It has been found out that the modified paints show shear thinning behaviour with a yield point and thixotropy. At the same time, they behave as viscoelastic liquids with different portion of elastic component of deformation at shear stresses in the vicinity of the yield point. The additive Byk 410 has been evaluated as the most efficient type of rheological additive. Its addition to the basic paint is easy and the paint samples modified with this additive exhibit the most suitable rheological properties.
Rozsah stran
p. 305-318
ISSN
1211-5541
Trvalý odkaz na tento záznam
Projekt
Zdrojový dokument
Scientific papers of the University of Pardubice. Series A, Faculty of Chemical technology. 10 (2004)
Vydavatelská verze
Přístup k e-verzi
open access
Název akce
ISBN
Studijní obor
Studijní program
Signatura tištěné verze
47333
Umístění tištěné verze
Univerzitní knihovna (studovna)
Přístup k tištěné verzi
Klíčová slova
reologické vlastnosti, rozpouštědlové efekty, nátěrové systémy, modifikace