Emulsifier-free (meth)acrylic colloids stabilized by cationic monomer containing two charged moieties

Towards improved performance of waterborne polymer dispersions through creation of dense ionic interparticle network within their films

“…The cationic monomer DABCO is not commercially available, so prior to polymerization reaction, DABCO was synthesized following the Scheme 1, reported elsewhere [14,15], where the characterization of the monomer is reported as well.…”

“…A typical acrylic formulation, 50/50 BA/MMA was used and IA and DABCO functional monomers were selected to give the ionic character to the latexes. In this work, in order to incorporate functional monomers into BA/MMA, the synthetic procedure developed in previous works [11,14,16] was used, however, this time the use of ionic surfactant was necessary to obtain stable latexes (SDS for anionic latex and DTAB for cationic ones).…”

“…According to the authors, at pH around 2.7, small amount of IA anionic monomer was buried within the particles, while the remaining IA was distributed equally between the particle surface and the aqueous phase. On the other hand, we have recently reported on incorporation of DABCO cationic monomer by emulsifier-free MMA/BA emulsion polymerization performed in semi-continuous mode under starved monomer conditions to enable the incorporation and to decrease the creation of soluble oligomers in aqueous phase [14]. High solids content and film forming dispersions were attained.…”