Biocidal polypropylene

New Orleans, La., 22nd-26th Aug. 1999, p.483-4 QUATERNARY AMMONIUM FUNCTIONALISED POLYPROPYLENE IMINE DENDRIMERS AS POTENT BIOCIDES Chen C Z Cooper S L Delaware,University... 

The use of polymeric ammonium salts and a sulfonic acid salt of sodium is an easy and efficient way of coating fabrics furthermore, employing the layer-by-layer (LbL) deposition technique can broaden the application of N-halamine biocides in other polar substances for use as antimicrobial coatings. Branched PEI, polypropylene (PP) and styrene maleic anhydride copolymers are a very good coating for food packaging materials, possibly due to the presence of both cationic- and N-halamine-forming structures. N-halamine cationic antimicrobial polymers based on (acrylamidopropyl)trimethylammonium chloride, PDDA chloride and poly(2-acrylamido-2-methylpropane sulfonic acid sodium salt) have been synthesised and coated onto cotton fabrics via an LbL deposition technique. 

Gawish, S.M., Matthews, S.R., Wafa, D.M., Breidt, R, Bourham, M.A., 2007a. Atmospheric plasma-aided biocidal finishes for nonwoven polypropylene fabrics. 1. synthesis and characterization. J. Appl. Polym. Sci. 103, 1900-1910. 

Akcros is part of the Dutch chemicals group Akzo Nobel. Several Akcros additive products have already been mentioned in Chapter 5 of this report. The company and its products were originally geared largely to the PVC industry, but Akcros has diversified to provide additives for use in polyolefins and other resins. Its biocides are targeted at polyethylene, polypropylene, silicones and polyurethanes, as well as PVC. 

The resulting coated product exhibited biocide, antibacterial properties with excellent adhesion to the substrate. Similar results were obtained when polypropylene, polyethylene, polycarbonate, polyamide, polyimide and cellulose derivative films were treated/coated according to Example 4. The same experiment was repeated with paper and fabrics (woven and nonwoven) and similar biocide properties were obtained. 

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