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Influence of emulsifier on the formation of alkyd emulsions
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1995 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 94, 161-171 p.Article in journal (Refereed)
Abstract [en]

In traditional alkyd paints, the alkyd is dissolved in an organic solvent such as mineral spirit. For health and environmental reasons there is an increasing interest in water-borne alkyd paints. Alkyd emulsions are therefore an interesting alternative. The alkyd emulsion should have a good colloidal stability at a low concentration of surfactant. A high concentration of surfactant gives undesired properties of the paint film, as for example water sensitivity. In this paper, the influence of emulsification temperature and emulsifier concentration on the formation of alkyd emulsions has been investigated. The temperature dependence observed with both anionic and nonionic emulsifiers is related to the change in viscosity of the alkyd with temperature. In the case of nonionic emulsifiers, an additional effect is seen due to the change in HLB (Hydrophilic Lipophilic Balance) of the surfactant with temperature. A concentration corresponding to a close packing of the non-ionic surfactant on the surface of the droplets is needed to obtain a stable emulsion when nonionic surfactants are used. In the case of anionic emulsifiers, stable emulsions can be obtained at low concentrations giving a very low packing density at the surface.

Place, publisher, year, edition, pages
1995. Vol. 94, 161-171 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26465OAI: oai:DiVA.org:ri-26465DiVA: diva2:1053467
Note
A895Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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