Journal
PROGRESS IN ORGANIC COATINGS
Volume 165, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2022.106734
Keywords
Titanium dioxide(TiO2); Waterborne coatings; POEOA-based dispersant; Dispersion; ATRP
Funding
- FCT (Fundacao para a Ciencia Tecnologia) [2020.09161, LISBOA-01-0247-FEDER-038366]
- MATIS [CENTRO-01-0145-FEDER000014]
- European Regional Development Fund (FEDER) through the Programa Operacional Regional do Centro [CENTRO2020]
- FEDER funds through the program COMPETE -Programa Operacional Factores de Competitividade -and by national funds through the FCT -Fundacao para a Ciencia e a Tecnologia [UIDB/00285/2020, REEQ/481/QUI/2006]
- FCT [POCI-2010]
- FEDER, Portugal
Ask authors/readers for more resources
In this work, a new type of polymeric dispersants were synthesized and used for the dispersion of titanium dioxide particles in water-based paint formulations. The dispersants showed high dispersion efficiency and improved gloss and pigment dispersion compared to a standard commercial dispersing agent. This study provides valuable insights into the development of efficient additives for water-based paints.
In this work, a new polymeric dispersants based on poly[oligo(ethylene oxide) methyl ether acrylate] (POEOA) as hydrophilic block and poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and dopamine (Dopa) as anchoring molecules, have been synthetized and successfully used as efficient tailor-made polymers for the aqueous dispersion of titanium dioxide (TiO2) particles. The controlled structure of this new class of additives was obtained by initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP). The proposed polymer dispersants were characterized by size exclusion chromatography (SEC) and nuclear magnetic resonance analysis (H-1 NMR). The dispersion efficiency was evaluated by dynamic light scattering (DLS), zeta potential (zeta), rheology and transmission electron microscopy (TEM). The influence of different stabilizing blocks bounded to the same anchoring block on the dispersion efficiency was evaluated in aqueous dispersions of TiO2 using a common water-based paint formulation (satin vinyl paint). Aiming for in-dustrial validation, a satin paint was also formulated with the new dispersants. Higher gloss (up to 39%) and improved pigment dispersion were observed when using the tailor-made polymers, comparing to the use of a standard commercial poly(acrylic acid) (PAA) dispersing agent. The data presented suggest that POEOA-based macrostructures are highly efficient additives for the dispersion of TiO2 in water-based paint formulations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available