DESCRIZIONE
The invention relates to an antibacterial agent and its use. In order to provide an antibacterial active agent with which substrates, especially fibers and textiles, can be permanently equipped, it is proposed in the invention that this contains a modified natural product with silyl groups, in particular a biopolymer, wherein the modified natural product antibacterial properties and functional Groups selected from the group consisting of amino, hydroxyl and carboxyl groups. In this way, dirt-repellent and antibacterial inorganic-organic modifications of biopolymers are created, which are suitable for the permanent finishing of substrates, in particular of fibers and textiles. Antibacterial equipment is understood to mean one which has antibacterial and / or antiviral and / or antiparasitic and / or antifungal properties.