WATERBORNE ACRYLIC/CASEIN LATEXES AND THEIR APPLICATION AS ECOFRIENDLY COATING

BARANDIARAN, M:J:; PASSEGGI, M.C.G.; GUGLIOTTA, L.M.; PICCHIO, M. L.; MINARI, R. J.

Cancun

Simposio; Simposio Latinoamericano de Polimeros; 2016

Sociedad Polimérica de México

Acrylic/casein hybrid latexes have gained increasingly industrial interest in recent years because of their promising properties as binders for coatings.1 Since the highly hydrophilic character of casein, hybrid films present some shortcoming such as poor water resistance which limits their further application.2 It is expected that increasing compatibility between polymer and protein phases, by covalently bonding both components, superior properties of the hybrid films will result. In this regard, the chemical modification of casein appears as a promising route to favor the grafting of acrylic polymers and overcome the weak characteristic of the hybrid materials. The aim of this work is to evaluate the incorporation of vinyl groups onto casein and to analyze the effect of the number of functionalities on the polymer/protein compatibility and coating properties of the materials. Additionally, hybrid latexes prepared from modified casein were formulated with commercial additives in order to maximize the coating performance of the hybrid binders.