UNE METHODE DE PREPARATION D'UNE COMPOSITION RENFERMANT UN MELANGE DE COMPOSE ANTIMICROBIEN OBTENU EN PULVERISANT UNE MATIERE DE BOIS OU EN EXTRAYANT UNE MATIERE DE BOIS
The invention relates to a mixture to be included in a composition or its semi-finished product, which compositionor its semi-finished product contains at least one anti-micro-organisticagent； a possible solvent system with either hydrophobic orhydrophilic nature, selected according to the target of usage； as well aspossible surface active agent. The mixture is obtained bypulverizing wood or plant material and/or by extracting the possiblypulverized wood or plant material, so that said mixture containsat least two different polyphenolic compounds selected from the followinggroup: lignans, stilbenes, juvabiones andflavonoids； said mixture further containing oligomers of said polyphenoliccompounds, so that the mixture also must have the followingproperties: the mixture has an anti-micro-organistic effect in the compositionor in the semi-finished product； the cytotoxicityof the polyphenols contained in the mixture is at least 10 times lower withrespect to BHT； the mixture does not irritate theskin in a so-called single patch test with contents of 0.1 wt%.
