The invention relates to a concentrated product for treating and protecting mineral surfaces without fluorinated compounds, the concentrated product comprising, based on its total weight, 50 to 69% by weight of a first emulsion of one or more self-crosslinking acrylic (co)polymers, 20 to 29% by weight of a second emulsion comprising at least two compounds selected from silanes, alkoxysilanes, siloxanes and organosiloxanes, and 1 to 6% of one or more biocides, as well as to a ready-to-use product. The invention also relates to a manufacturing method and a method for treating and protecting mineral surfaces.
The present invention relates to a piece of street furniture comprising an air purification unit integrated within the piece of street furniture, suitable for purifying the surrounding air of chemical, particulate and/or biological pollutants, the air purification unit comprising: (a) a housing body comprising an air inlet and an air outlet in fluid connection with at least one air circulation means, the at least one air circulation means being arranged to draw in outside air to be purified at the air inlet and to discharge the purified air to the outside through the air outlet, (b) at least one filter arranged in the housing body in fluid connection with the air circulation means and suitable for purifying the air by filtrating at least one portion of the pollutants contained in the air to be purified, the pollutants being chosen from nitrogen and sulphur oxides, ozone, volatile organic compounds, fine organic and inorganic particles, odours, pollens, hair, mites, microorganisms and/or viruses, (c) a means for connecting to a power supply source, wherein the purification unit and/or the filter(s) are removably installed and are accessible by an access means provided in the piece of street furniture, the latter being preferably selected from display and advertising panels, public benches, waste bins, public toilets, public letter boxes, lampposts, bicycle terminals, gates, water points, guard posts, access kiosks to metro stations or shelters for public transport users. The invention also relates to a method for purifying ambient air in urban areas by means of one or more pieces of street furniture according to the invention.
F24F 3/16 - Systèmes de conditionnement d'air dans lesquels l'air conditionné primaire est fourni par une ou plusieurs stations centrales aux blocs de distribution situés dans les pièces ou enceintes, blocs dans lesquels il peut subir un traitement secondaire; Appareillage spécialement conçu pour de tels systèmes caractérisés par le traitement de l'air autrement que par chauffage et refroidissement par ozonisation
F24F 11/39 - Surveillance de la performance des filtres
B01D 46/10 - Séparateurs de particules utilisant des plaques, des feuilles ou des tampons filtrants à surface plane, p.ex. appareils de précipitation de poussières
F24F 8/10 - Traitement, p.ex. purification, de l'air fourni aux locaux de résidence ou de travail des êtres humains autrement que par chauffage, refroidissement, humidification ou séchage par séparation, p.ex. par filtrage
F24F 8/167 - Traitement, p.ex. purification, de l'air fourni aux locaux de résidence ou de travail des êtres humains autrement que par chauffage, refroidissement, humidification ou séchage par séparation, p.ex. par filtrage par des moyens chimiques utilisant des réactions catalytiques
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