Cationic quaternary ammonium actives u2014 benzalkonium chloride and DDAC u2014 plus zinc pyrithione for odor-control and mildew-resist finishing of textiles.
Antimicrobial textile finishes are biocidal actives applied during finishingnto limit the growth of odor-causing bacteria and fungi on fabric. RawSourcensources two working classes: cationic quaternary ammonium compounds u2014 benzalkoniumnchloride (BKC) and didecyldimethylammonium chloride (DDAC) u2014 and the metal-organic activenzinc pyrithione. The quats and the pyrithione cover different organisms, so a hygiene ornodor-control finish often pairs a quat with a fungistat rather than relying on one active.
nnQuaternary ammonium actives carry a positive charge that adsorbs onto the anionicnsurfaces of cellulosic fiber and of microbial cell walls. That substantivity is also thentrade-off: a quat held by physical adsorption can lose finish over repeated launderingnunless it is anchored with a binder or a reactive group. Specify a wash-durability targetnup front. A finish rated for 5 washes and one rated for 50 are different formulations, notnthe same active at a different dose.
nnZinc pyrithione is the usual choice where fungal control matters: footwear linings,nperformance wear, outdoor fabric. All three actives are registered biocides. In the US theynfall under EPA FIFRA as antimicrobial pesticides and treated-article rules, and in the EUnunder the Biocidal Products Regulation. Treat the registered-use list, not the chemistry,nas the constraint, and confirm regulatory status for your application and jurisdictionnbefore you formulate.
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