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Rheological behaviour of latexes in-can and during film drying
YKI – Ytkemiska institutet.
1997 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 30, 141-158 p.Article in journal (Refereed)
Abstract [en]

In-can rheology was studied for sixteen model acrylate laticies and a commercial vinyl/acrylate copolymer latex. Following the model of Quemada the shear thinning behaviour, the effects of latex neutralisation and the copolymer composition could be described. Furthermore, the rheological effects of coalescing agents and thickeners (a cellulose and hydrophobically modified types thereof (HEC and HMEC), as well as associative urethanes (HEUR)) were studied. A special apparatus (the TNO Filmviscometer) was shown to be suitable to follow the rheological changes during drying of latex films. Effects of binder type, coalescent and thickener were investigated. The rheological effects of coalescents during drying could be related to the evaporation kinetics and latex particle swelling, while the effects of thickeners reflect the initial in-can rheology. The rheological changes during drying correlate to sagging and levelling behaviour and to the adsorption behaviour of associatice thickeners onto latex particles.

Place, publisher, year, edition, pages
1997. Vol. 30, 141-158 p.
Keyword [en]
Rheology in-can, rheology during drying, acrylate latexes, coalescing agents, associative thickeners (HMHEC, HEUR), adsorption of thickeners onto latex, film drying, evaporation kinetics, sagging/levelling.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27440OAI: oai:DiVA.org:ri-27440DiVA: diva2:1054445
Note
A1088Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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