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Adsorption studies of associative interactions between thickener and pigment particles
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1997 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 30, 167-171 p.Article in journal (Refereed)
Abstract [en]

Adsorption of a HEUR thickener and a HMHEC thickener have been studied on two titanium dioxide pigment grades with and without dispersant previously adsorbed. One of the pigments had an acidic surface, mainly silica, and the other a more basic alumina/zirconia surface. Both associative thickeners adsorbed on pigments having a partially hydrophobic (alpha-olefinic maleic acid co-polymer) dispersant preadsorbed on the surface. No adsorption takes place when sodiumhexametaphosphate, a highly charged low molecular weight inorganic dispersant, was used. The alpha-olefinic-maleic acid co-polymer dispersant is shown to adsorb on a negatively charged silica surface. This is assigned to hydrogen bonding between unionised carboxylic groups from the dispersant and oxide ions on the pigment surface.

Place, publisher, year, edition, pages
1997. Vol. 30, 167-171 p.
Keyword [en]
Thickeners, pigments, surface adsorption, dispersants
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27439OAI: oai:DiVA.org:ri-27439DiVA: diva2:1054444
Note
A1087Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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