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Quaternari d'ammonio
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Essica Srl
Via E.Mattei, 15
35020 Maserà di Padova - ITALY
Email: essica.info@tin.it
URL: www.essica.it

Quaternari d'ammonio

I quaternari d’ammonio, chiamati anche quaternari o QAC sono dei tensioattivi (surfactants) cationici. Le caratteristiche chimico-strutturali dei composti dell’ammonio quatemario ne definiscono l’impiego e dipendono dal tipo e dal numero di radicali alchilici e arilici presenti nella molecola.
I più impiegati a livello industriale sono:
Caratteristiche:
Compatibilità:
Stabilità e sicurezza:
Modalità e concentrazioni d’uso:
Attività
(Microbicida, Batteriostatica)
ad alta concentrazione
a bassa concentrazione (< 300 ppm)
Meccanismo d’azione
Adsorbimento sulle pareti cellulari dopo penetrazione nella cellula
Interferenza con l’attività metabolica
pH
Alcalino ottimale con diminuzione dell’efficacia all’aumentare dell’acidità
Sostanze organiche
Proprietà detergenti (difficoltà del risciacquo) ma diminuisce il n° di molecole attive sui microrganismi
Temperatura
Non influisce significativamente, efficaci fino a 100°C
Concentrazione d’uso
> 300 ppm  optimum 1000 ppm
Tempo
15 minuti  -   300 ppm
  2 minuti  -   500 ppm
  1 minuto - 1000 ppm
Disattivanti
Tensioattivi anionici