An approach to water emulsions modification with structure forming additives, namely cellulose esters, is proposed in the article. Influence of the film former origin on the system rheological properties at different shear-strain rates was examined. Structural and mechanical, as well as rheological properties of the studied systems were determined. The results confirm that hydroxyethylcellulose has a greater structure forming effect in comparison with carboxymethylcellulose. Hydroxyethylcellulose provides well-definite pseudoplastic properties to the two-component systems that facilitate the production and application of paints. The results of the investigation could be used in the emulsion paint (coatings) production.
A most effective and less energy demanding method of producing fatty esters, polyol esters, by esterifying fatty acids, with a pentaerythritol and trimethylolpropan alcohols in the presence of an acid catalyst at elevated temperature wherein an azeotroping agent, particularly toluene, is used to facilitate continuous removal of water by distillation, formed as a by-product during the esterification reaction. The esterification reaction is completed within 5 hours, pentaerythritol and trimethylolpropan esters were produced.
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