CHARACTERIZATION OF POLYURETHANE/ACRYLIC HYBRIDS FILMS BY SAXS

PERUZZO, P.J.; PARDINI, O.R.; AMALVY, J.I.

Activity Report 2005 ? Brazilian Synchrotron Light Laboratory

Editora Cubo

Año: 2006 p. 1 - 2

1518-0204

Polyurethane-based coating systems have an established place in the coatings industry due to the high gloss and good weather stability. Developments in urethane chemistry and efforts to reduce emissions increased interest in the development of environmentally friendly water-borne coatings. The incorporation of acrylic monomers lead to cost reduction and properties are affected depending on the amount and on the way of incorporation. Film-forming properties of physical blends are not always satisfactory. The  polymerization of acrylic monomers in the presence of preformed polyurethane chains with polymerizable terminal vinyl groups is a useful synthetic method to achieve better film-forming properties. Final products are known as polyurethane/acrylate or acrylic/polyurethane hybrids and should produce binders with better technological properties than physical mixtures. In this work the morphology of hybrids polyurethane/acrylic with different acrylic content on cured and non-cured films were studied using SAXS.