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1. (WO2014209095) BACTERIOSTATIC AND FUNGISTATIC ADDITIVE IN MASTERBATCH FOR APPLICATION IN PLASTICS, AND METHOD FOR PRODUCING SAME

Pub. No.:    WO/2014/209095    International Application No.:    PCT/MX2013/000077
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Wed Jun 26 01:59:59 CEST 2013
IPC: B82Y 30/00
A01N 29/00
A01N 25/10
Applicants: SERVICIOS ADMINISTRATIVOS PEÑOLES, S.A. DE C.V.
Inventors: BENAVIDES PEREZ, Ricardo
BOCANEGRA ROJAS, Jose Gertrudis
TENA SALCIDO, Carlos Sergio
Title: BACTERIOSTATIC AND FUNGISTATIC ADDITIVE IN MASTERBATCH FOR APPLICATION IN PLASTICS, AND METHOD FOR PRODUCING SAME
Abstract:
The invention relates to an additive of ZnO/Ag° with a bacteriostatic and fungistatic action in the production of plastic items based on resins such as polypropylene, polyethylene, polystyrene, high-impact polystyrene, polyurethanes, etc., especially for producing automotive products, electrical appliances, products for washing, for storing and conducting water, for packaging, etc. The additive is prepared by mixing nanometric silver concentrates and pre-treated zinc oxide with a polymer resin compatible with the target application as a vehicle, obtaining pellets of the additive in a ratio of between 10:90 and 90:10 in weight of ZnO/Ag° : vehicle. The additive is biologically effective in a ratio in the final product of between 0.01 and 0.5 wt. % of polymer mixture and does not have any negative effects on other properties of the polymer, such as the whiteness thereof.