Abstract
A new class of materials consisting of water-borne formulations (lattices) of sub-micron to nano-sized heterophasic particles with film-forming capability has been developed. These lattices are prepared by either multi-step sequential emulsion polymerisation, as in the case of partially fluorinated acrylic lattices with core-shell particle structure, or by sequential emulsion copolymerisation of acrylates with the reactive comonomer TSPMA (trimethoxysilylpropyl methacrylate) followed by sol-gel co-condensation of various alkoxysilanes onto the pre-formed acrylic particles, yielding hybrid organic-inorganic core-shell particles. The investigation on the structure, morphology and chemical evolution of these systems during their synthesis and after film formation is aimed at optimizing their application properties in the field of the preservation of cultural property. In particular, the unique features resulting from the heterophasic nature of the latex particle can be directed towards the formation of partially fluorinated protective coatings with ultra-hydrophobic surfaces or of new consolidants for porous substrates based on nanostructured hybrid acrylic-organosiloxane materials.
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