High Solid Acrylic-Melamine Latexes with Tunable Crosslinking Capability

CÓRDOBA, CARLOS A.; RONCO, LUDMILA I.; BARRIOS, CELINA E.; GUGLIOTTA, LUIS M.; MINARI, ROQUE J.

MACROMOLECULAR REACTION ENGINEERING

WILEY-V C H VERLAG GMBH

Año: 2018 vol. 13

1862-832X

Miniemulsion polymerization was employed to produce high solid content (50%) acrylic/melamine latexes with varied crosslinking capability, for their potential application as waterborne crosslinkable coatings. This synthesis strategy allowed the efficient incorporation of a hydrophobic crosslinker, iso-butylated melamine (iBMF), into polymer particles, and obtaining latexes with different iBMF concentrations and acrylic polymer with varied content of hydroxylic groups (OH-). The involved crosslinking mechanisms and the physical transformations during film thermosetting of acrylic/iBMF nanocomposite were exhaustively investigated by combining thermal, spectroscopic and thermo-mechanical analysis. The influence of reactive groups concentration (iBMF and OH- content in the acrylic polymer) on the rate of curing, the crosslinking degree, and consequently onto the sensitive properties of cured films were here discussed.