Boratos de zinc en pinturas retardantes de llama basadas en ligantes alquídicos clorinados

GIUDICE, CARLOS A.; BENITEZ JUAN C.; PEREYRA, ANDREA M.

Capital Federal, Argentina

Congreso; Report 2004. Congreso y Exposición Internacional de Pinturas y Tintas; 2004

Sociedad Argentina de Tecnólogos en Recubrimientos (SATER)

This work discusses the influence of zinc borates with molecular formulas of 2ZnO·3B2O3·3.5H2O and 2ZnO·3B2O3·7.5H20 used for substituting antimony trioxide on the performance of chlorinated alkyd, flame retardant coatings.   Experimental coatings were manufactured on a laboratory scale, applied by brush on wood panels (Araucaria Angustifolia) and finally tested in a Limiting Oxygen Chamber (LOI values), in a Flame Cabinet (Intermittent Bunsen Burner Rating) and in a Two-foot Flame Tunnel (Flame-spread Index, Panel Consumption, Afterflaming and Afterglow).   Results of laboratory tests indicated that coatings with a chlorine-containing resin as the film forming material, zinc borates can act as a flame retardant.   Keywords: flame retardant coatings, chlorinated alkyd resin, antimony trioxide, zinc borates, limiting oxygen index, two-foot flame tunnel.