Understanding and controlling the interactions of adsorbing latex with inorganic oxides is of great value in waterborne architectural coatings. Unlike the common non-reactive binders, this type of reactive adsorbing latex can be absorbed onto TiO2 surface and form TiO2-Polymer composite. This recently developed TiO2-polymer composite provides a new approach to enhancing the TiO2 scattering efficiency in latex paints, resulting in significantly improved wet and dry hiding as well as other paint properties.Asymmetrical Flow Field-Flow Fraction with on-line Multi-Angle Light Scattering (AFFFF-MALS) was developed to quantitatively characterize the pre-composite latex polymer and the TiO2-polymer composite. This development enabled us to demonstrate the formation of the TiO2-polymer composite in the aqueous phase, probe the kinetics of the formation of TiO2-Polymer composite in different formulations, and predict the reactivity of different grades of TiO2with the adsorbing polymer. Using this information, we can make better adsorbing latex polymer by design, and have better understanding and control of the key formulation and process variables affecting the latex-pigment interaction in the paint manufacturing process. Therefore, this analytical technique is essential and has enabled the large scale industrial production of this new adsorbing technology platform. Figure 1.  AFFFF-MALS fractograms of latex, TiO2 and composite particles.

Probing the TiO<sub>2</sub>-polymer composite formation for a new class of latex paint by AFFFF-MALS

247th National Meeting (2014)

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Probing the TiO2-polymer composite formation for a new class of latex paint by AFFFF-MALS

Probing the TiO₂-polymer composite formation for a new class of latex paint by AFFFF-MALS