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The chemical reactivity of many fillers and pigments used in commercial polymer formulations often causes detrimental polymer-filler interactions unless compensating additives are applied during compounding. A method of reducing these interactions by forming stable, inert magnesium-silicate gel-coatings on the surface of the mineral fillers is described. Various methods of measuring this reduction in chemical activity are discussed. Considerable changes in rheological properties of the mineral dispersions in paraffin oil and water are observed.
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Hodgkin et al. (1974) studied this question.
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