Disinfectant aqueous composition and method for treating substrates

An aqueous composition for treating a substrate, comprising:

• a) 1 to 60% by weight of a solvent mix comprising:
• i. 2 to 25% by weight of the solvent mix of a diol which is a vicinal diol with carbon chain length from C7 to C14;
• ii. 2 to 80% by weight of the solvent mix of a fatty acid ester of the formula R1COR2 wherein R1 represents an alkyl group having 6 to 15 carbon atoms and R2 is methyl or ethyl;
• iii. 2 to 80% by weight of the solvent mix of a glycol ether;
• b) 0.2 to 5% by weight of a bipolar antimicrobial particle which is an asymmetric 1:1 or 2:1:1 clay particle comprising alternating tetrahedral and octahedral sheets terminating with a tetrahedral sheet at one external surface plane and an octahedral sheet at another external surface plane and an antimicrobial group attached to the coordinating cation on one of the said external surface plane, wherein the antimicrobial group is selected from quaternary ammonium material comprising a single alkyl or alkenyl long chain having an average chain length greater than or equal to C20 or a quaternary ammonium material selected from cetylpyridinium chloride (CPC), Cetyltrimethyl ammonium Bromide (CTAB), Benzylkonium (BKC), Benzethonium chloride, cetrimide, Quaternium, polyhexamethylene BH, antimicrobial alcohols, antimicrobial phenols, antimicrobial organic acids/salts, Zinc pyrithione, Ketoconazole, Octopirox or combinations thereof;
• and
• c) water.