BIOCIDAL COMPOSITIONS FOR THE TREATMENT OF BIODETERIORATION OF EXTERNAL SURFACES OF OLD STONEWORK AND MASONRY AND NON-INVASIVE TECHNIQUE FOR APPLYING THE SAME
The invention relates to a process for the treatment of deteriorated external surfaces of old stonework and masonry caused by micro-organisms and vegetation growth. According to the invention, the process consists, in a first stage, in spraying a curative 10% biocidal solution consisting of 0.7...14% synthesis biocides with sporicidal, bactericidal and fungicidal effect, preferably glutaraldehyde and quaternary ammonium salts, or 15...35% fatty acid derivative with non-selective herbicidal effect and 0.5...3% azolic fungicide, 0.1...5% aromatic oil, 5...80% solvent, 0.5...10% emulsifier and, for the remainder up to 100%, water, removal, after 10...25 days, of the so destroyed bioderm, washing and drying the surface and uniformly applying by spraying or brushing a preventive biocidal composition comprising 0.5...5% peroxidic fatty acid derivative or 0.5...6% quaternary ammonium salt and fungicide, 0.5...5% bioactive essential oil and 60...90% biodegradable air-drying film-forming agent.Invenţia se referă la un procedeu pentru tratarea deteriorării suprafeţelor exterioare din piatră şi zidărie veche, din cauza dezvoltării microorganismelor şi vegetaţiei. Procedeul conform invenţiei constă din aplicarea, într-o primă etapă, prin pulverizare, a unei soluţii biocide curative 10%, constând din 0,7...14% biocide de sinteză, cu efect sporicid, bactericid, fungicid, preferabil glutaraldehidă şi săruri cuaternare de amoniu, sau 15...35% derivat de acid gras cu efect erbicid neselectiv, şi 0,5...3% fungicid azolic, 0,1...5% ulei aromatic, 5...80% solvent, 0,5...10% emulgator şi până la 100% apă îndepărtarea, după 10...25 de zile, a biodermei distruse, spălarea şi uscarea suprafeţei aplicarea uniformă a unei compoziţii biocide preventive, prin pulverizare sau pensulare, conţinând 0,5...5% derivat peroxidic de acid gras sau 0,5...6% sare cuaternară de amoniu şi fungicid, 0,5...5% ulei volatil bioactiv şi 60...90% agent peliculogen biodegradabil, cu uscare la aer.
