VOC-free Synthesis of Waterborne Poly(hydroxy urethane)-(meth)Acrylics Hybrids by Miniemulsion Polymerization
Résumé
A VOC-free method for the synthesis of Poly(hydroxyurethane)-(meth)acrylic waterborne hybrid dispersions was developed. Poly(hydroxyurethane)s (PHU) synthesized by bulk aminolysis of cyclic-carbonate derivatives using bio-sourced vegetable oil-based diamines was dissolved in (meth)acrylate monomers, the solution dispersed in water and polymerized in miniemulsion. Hybrid particles exhibiting core-shell morphology with the PHU in the shell were obtained. The performance of the 2 coating cast from these dispersions was studied, finding that by simply varying the PHU content and the casting conditions, widely different mechanical properties of PHU-(meth)acrylic hybrids could be obtained. The versatility of the synthetic method that is not limited to the type of (meth)acrylic monomers, opens the way for obtaining a broad range of environmentally friendly VOC and isocyanate free waterborne urethane-acrylic coatings and adhesives.
Domaines
Polymères
Origine : Fichiers produits par l'(les) auteur(s)
Loading...