Antimicrobial agents: solutions for the materials industry

Antimicrobial agents: solutions for the materials industry

Wednesday, 6 May, 2026

People are becoming increasingly interconnected, which brings with it a growing need to protect the products we use from microbial attack –which in some cases may involve pathogenic organisms– as clearly illustrated by Covid-19.

Various methods exist to prevent microbial growth, such as temperature control, radiation or chemical agents. The latter inhibit the proliferation of bacteria and fungi and can be divided into two types: organic agents –such as alcohols, biocides and fungicides– which act rapidly but have a short duration, and inorganic agents –compounds based on metal ions– which offer longer-lasting protection and can be incorporated into paints, plastics and coatings, among other materials.

One of the most important metals in this field is silver. Its use is not new; as far back as antiquity, Roman, Greek and Egyptian civilisations used silver as an antimicrobial agent to prevent infections and preserve food and water. Today, the underlying principle remains the same, although the technology has evolved significantly.

How does silver work?
Three mechanisms:

Destruction of the cell membrane
Inhibition of DNA replication
Disruption of cellular respiration

In this way, durable, effective and safe protection against microorganisms is achieved, safeguarding material surfaces from deterioration and helping to reduce the presence of pathogens.

At Comindex we are distributors of BactiBlock silver-based additives from Laboratorios Argenol. These compounds are available in clay-based or amorphous glass carriers, both treated and modified to incorporate silver.

Source: www.laboratorios-argenol.com

Where can this additive be applied?
These additives are available in various formats –including powders, pellets, water pre-dispersions and solvent pre-dispersions–providing the versatility required for incorporation into a wide range of materials, formulations and manufacturing processes.

In addition, silver-based additives exhibit excellent dispersion, contain no VOCs, do not affect the properties of the host materials and are resistant to a broad range of temperatures.

What applications are possible?
The range of applications for these agents is extensive. By way of indication, here are a few examples:

Paints and varnishes
Hospitals, clinics and care homes
Public transport
Toothbrushes
Supermarkets and food environments
School materials, playgrounds and toys
Plastic surfaces and protective screens
Bathrooms and kitchens
Swimming pools

In conclusion, antimicrobial agents constitute a highly effective solution for a wide range of material formulations, protecting against microbial degradation and limiting the spread of pathogens on surfaces.

At Comindex –part of IMPAG Group– we can support you throughout your process. Simply contact our team of technical sales advisors.

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