Polyglycerin Fatty Acid Esters as Dispersants for Micropigments. Evaluation of Dispersants by Measurement of Interfacial Tension.:Evaluation of Dispersants by Measurement of Interfacial Tension
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概要
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Polyglycerin fatty acid esters (PGE) were studied as possible dispersants for micronized titanium dioxides in oils with different polarities. The interfacial tension between water and oil containing the micronized titanium dioxides remained constant within a certain concentration range of dispersant but decreased sharply thereafter. The concentration at which the interfacial tension decreased corresponded to that of the dispersant, which dispersed the micronized titanium dioxides in the oils homogeneously. The dispersions of the titanium dioxides in oils were observed by microscope.We found that hexaglyceryl polyricinolate was effective in dispersing the micronized titanium dioxides in a medium chain triglyceride while decaglyceryl pentaisostearate was effective in dispersing the micronized titanium dioxides in mineral oil.
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