EP4031645A1 - Sanitization composition and method for sanitization- purification of surfaces and environments - Google Patents
Sanitization composition and method for sanitization- purification of surfaces and environmentsInfo
- Publication number
- EP4031645A1 EP4031645A1 EP19801093.6A EP19801093A EP4031645A1 EP 4031645 A1 EP4031645 A1 EP 4031645A1 EP 19801093 A EP19801093 A EP 19801093A EP 4031645 A1 EP4031645 A1 EP 4031645A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- approximately
- titanium dioxide
- composition
- particles
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 73
- 238000011012 sanitization Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 51
- 239000002245 particle Substances 0.000 claims abstract description 42
- 230000005855 radiation Effects 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000001246 colloidal dispersion Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims abstract 3
- CPZFDTYTCMAAQX-MBCFVHIPSA-J tetrasodium;5-[[4-[bis(2-hydroxyethyl)amino]-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-2-[(e)-2-[4-[[4-[bis(2-hydroxyethyl)amino]-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate Chemical compound [Na+].[Na+].[Na+].[Na+].N=1C(NC=2C=C(C(\C=C\C=3C(=CC(NC=4N=C(N=C(NC=5C=CC(=CC=5)S([O-])(=O)=O)N=4)N(CCO)CCO)=CC=3)S([O-])(=O)=O)=CC=2)S([O-])(=O)=O)=NC(N(CCO)CCO)=NC=1NC1=CC=C(S([O-])(=O)=O)C=C1 CPZFDTYTCMAAQX-MBCFVHIPSA-J 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 230000005670 electromagnetic radiation Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000005674 electromagnetic induction Effects 0.000 claims 1
- 239000006185 dispersion Substances 0.000 description 14
- 230000001699 photocatalysis Effects 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 230000000845 anti-microbial effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000001804 emulsifying effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000001033 granulometry Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- 235000010269 sulphur dioxide Nutrition 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 1
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 241000238876 Acari Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000192125 Firmicutes Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000013566 allergen Substances 0.000 description 1
- 230000000172 allergic effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- -1 microbes Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000006199 nebulizer Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229960002715 nicotine Drugs 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/48—Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
- C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/20—Water-insoluble oxides
Definitions
- the present invention relates to a sanitization composition and method for sanitization-purification of both internal and external surfaces and environments.
- a clean environment with pure air in fact guarantees a better quality of life and better working conditions and, in the medical-hospital environment, better care conditions.
- compositions or paints which can be applied on certain surfaces and which contain substances having a disinfectant, antimicrobial or similar effect.
- compositions are not fully satisfactory, above all in terms of effectiveness, persistence of effectiveness, ease of use, versatility.
- An object of the present invention is to provide a sanitization composition and method which are free from the drawbacks herein disclosed in the known art; in particular, it is an object of the invention to provide a sanitization composition and method which are fully effective in the function of the sanitization/purification of the environments in which they are used, thus producing multiple beneficial effects.
- a further object of the invention is to provide a sanitization composition, and the respective method of use, which can be applied simply and quickly to various types of surfaces and substrates, thus maintaining its effectiveness over time.
- the present invention therefore relates to a sanitization composition and to a sanitization method as defined in essential terms in the annexed claims 1 and 11, respectively, as well as, for the additional preferred characters, in the dependent claims.
- the invention provides a sanitization composition and method that allow to purify the air and the environment, allowing in particular an effective and long-lasting sanitization effect of surfaces and environments.
- composition of the invention is applied in a simple and fast way to a plurality of different surfaces, such as walls, glass, coatings, furniture surfaces, sanitary fixtures, etc.
- the composition of the invention performs various beneficial actions and achieves a plurality of effects, such as for example: repellency to dirt and moisture (self-cleaning action); cleaned and disinfected surfaces; elimination of moulds, bacterial and viral agents, other microorganisms, avoiding furthermore that these are formed again (bacteriostatic action against mites, moulds, spores, animal allergens, bacteria, pollen, etc.); purifying action of the air, which becomes perfectly breathable and free from unpleasant odours (odour neutralizing action); abatement of polluting substances, in particular the so-called VOC (volatile organic compounds, which are eliminated up to 99.8%), fine particulate matter (PM 2.5 - PM 10), ethanol, carbon monoxide, benzene, ethyl benzene, toluene, methanol, sulphur dioxide, polycondensed aromatic compounds, nitrogen oxides, acetaldehyde, formaldehyde, xylene, nicotine, o
- composition of the invention does not affect in any way the surface on which it is applied, which remains perfectly intact and retains all of its original characteristics; the composition of the invention is also completely eco-compatible.
- composition of the invention can be used in a variety of environments: residential, work and medical-health, as well as outside, on the surfaces of buildings, monuments, etc.
- composition of the invention in a domestic or residential environment and in the workplace in general allows a significant increase in the quality of life and working conditions, allowing to live and work in healthy and clean environments .
- the abatement activity of polluting substances makes the composition useful also for external environments, for example if applied to surfaces of buildings and monuments, roofs, floorings, etc.
- An additional advantage of the invention is cost savings: by applying the composition of the invention, it is possible to do without a large number of different products and chemical detergents used for daily cleaning, disinfecting and sanitizing operations .
- composition of the invention comprises only natural components and is free of compounds and chemical additives such as chlorine, ammonia, detergents, etc.
- composition of the invention in fact comprises two main components: titanium dioxide, whose "photosensitive" molecules exposed to UV rays and in contact with the humidity of the air allow the oxygen to react with the substances with which they come into contact, transforming the same in molecules of harmless mineral salts; and water (distilled).
- composition once applied on a generic surface, is activated by photocatalysis, simply by light radiation (in particular, but not necessarily, UV radiation) in the presence of air.
- Activation does not require high intensity of irradiation: in general, less than 300 lumens are sufficient to activate the composition, triggering the photocatalytic process. In essence, activation is guaranteed only by the ultraviolet fraction of solar radiation and does not require artificial radiation (which however, optionally, can also be carried out).
- the composition can however also be activated in another way, for example with another type of electromagnetic radiation (UV radiation, light radiation in the visible field, etc.), by induction, etc.
- UV radiation ultraviolet radiation, light radiation in the visible field, etc.
- the treatment of an environment does not involve any risk and waiting: the action and the beneficial effects of the invention are in fact almost instantaneous, and start when the surface on which the composition has been applied is exposed to UV light:
- composition of the invention contains (or essentially consists of) an aqueous colloidal dispersion of titanium dioxide, with particles of titanium dioxide of pre-established dimensions dispersed in water.
- composition of the invention is characterized by the use of titanium dioxide (or titanium oxide (IV), TiCb) of pre-established dimensions, which is activated by photocatalysis .
- the titanium dioxide present in the aqueous dispersion is in the form of particles having dimensions ranging from 100 to 300 nm, preferably from 150 to 300 nm.
- the particles of titanium dioxide have a mean diameter, calculated as the Sauter mean diameter (SMD) or as volume mean diameter (VMD), ranging from 200 to 250 nm, more preferably from 210 to 220 nm.
- SMD Sauter mean diameter
- VMD volume mean diameter
- At least 70% and preferably at least 80% and more preferably at least 90% of the particles has dimensions ranging from 150 nm to 300 nm.
- the starting material for the preparation of the composition of the invention is nanometric titanium dioxide, i.e. consisting or containing particles of titanium dioxide having nanometric dimensions (dimension of a few nanometres, less than 10 nm), which are aggregated during the preparation of the composition to form larger particles (agglomerates of nanometric particles) having the dimensions indicated above.
- the inventors of the present invention have instead found that the titanium dioxide photocatalytic activity is maintained (and to a certain extent improved) by using much larger particles.
- the aggregate shape according to the invention prolongs the useful life and effectiveness of the compositions of the invention.
- the particles used in the aqueous colloidal dispersion are aggregates of nanometric particles, i.e. having dimensions of less than 10 nm.
- the aggregate form of the particles in aqueous dispersion is evident from the analysis of the composition of the invention.
- the fundamental principle of photocatalysis is the decomposition of organic compounds using light (natural or artificial) and a material so called catalyst.
- the titanium dioxide is an odourless and colourless crystalline powder, with T1O2 chemical formula, having a photocatalytic capacity.
- the electrons of the outer orbit of the titanium dioxide present in the composition of the invention are released, allowing oxygen to react with contaminants, oxidizing and transforming the same into harmless molecules such as water, carbon dioxide and inorganic salts, also making the treated surfaces semi-repellent to fluids.
- the particles of titanium dioxide accelerate the decomposition of a multiplicity of substances and micro-organisms, such as organic substances, microbes, nitrogen oxides, polycondensed aromatic compounds, sulphur dioxide, carbon monoxide, formaldehyde, methanol, ethanol, benzene, ethyl benzene, monoxide and nitrogen dioxide.
- substances and micro-organisms such as organic substances, microbes, nitrogen oxides, polycondensed aromatic compounds, sulphur dioxide, carbon monoxide, formaldehyde, methanol, ethanol, benzene, ethyl benzene, monoxide and nitrogen dioxide.
- composition of the invention is in liquid form, for an easy application thereof.
- composition of the invention can be nebulized with a normal nebulizer and then sprayed on walls, furniture or any other surface exposed to light to activate its antibacterial, anti-pollution and self-cleaning action without the need to resort to materials previously treated for this purpose.
- the recommended application is approximately 1 litre of composition per 50 m 2 of treated surface. Approximately 100 ml of composition was shown to be effective for treating a surface of approximately 5-8 square meters.
- the amount of composition to be applied depends on the dimensions of the environment intended to be purified: as far as its effectiveness is concerned, it can be estimated that 10 m 2 of treated surface (approximately 10-20 ml/m 2 ) can purify 500-700 m 3 of air every hour.
- the effectiveness of the treatment with the composition of the invention is long-lasting and can be estimated at around 3-5 years.
- FIG. 1 is a diagram showing the dimension or granulometry distribution of the titanium dioxide used according to the invention (in particular, the graph shows the cumulative distribution and the distribution density of the particle dimensions);
- FIG. 1 is a table which shows some cumulative distribution values extracted from the graph of Figure 1.
- composition of the invention comprises particles of titanium dioxide dispersed in water.
- composition is a colloidal aqueous dispersion of titanium dioxide, with particles of titanium dioxide of pre- established dimensions dispersed in water.
- Water is preferably distilled water, in particular bi-distilled or tri-distilled water.
- the particles of titanium dioxide are preferably in the crystalline form of anatase.
- a part of the titanium dioxide is doped, in particular with nitrogen, in order to allow the photocatalytic action even with low intensity of UV radiation.
- the composition contains titanium dioxide in an amount ranging between approximately 1% and approximately 5% by weight, preferably between approximately 1.5% and approximately 2.5% by weight and in particular approximately 2%.
- the percentage of doped titanium dioxide (for example with nitrogen) in the composition is for example ranging between approximately 0.1% and approximately 0.5% by weight, preferably between approximately 0.1% and approximately 0.2%.
- composition of the invention also comprises hydrogen peroxide, for example in an amount ranging between approximately 0.1% and approximately 0.5% by weight, preferably between approximately 0.1% and approximately 0.2%.
- the particles of titanium dioxide have for example the dimensions shown in the graph of Figure 1 and in the table of Figure 2.
- titanium dioxide is present in aqueous dispersion with particles having dimensions ranging from 100 to 300 nm, preferably from 150 to 300 nm.
- At least 70% and preferably at least 80% and more preferably at least 90% of the particles have dimensions ranging from 150 nm to 300 nm and preferably about 270 nm +/- 5 nm.
- the particles of titanium dioxide preferably have a mean diameter, calculated as the Sauter mean diameter (SMD) or as volume mean diameter (VMD), ranging from 200 to 250 nm, more preferably from 210 to 220 nm.
- SMD Sauter mean diameter
- VMD volume mean diameter
- the particles of doped titanium dioxide have for example the same dimensions as the other particles of titanium dioxide as previously defined, for example about 270 nm +/- 5 nm.
- the composition optionally comprises, furthermore, an additive of the class of optical brighteners (also known as optical bluing agents, optical whiteners, fluorescent bleaching agents), i.e. a chemical compound which, added to a product, is able to improve the chromatic characteristics thereof.
- optical brighteners also known as optical bluing agents, optical whiteners, fluorescent bleaching agents
- the additive struck by ultraviolet radiation, is able to re emit, by fluorescence, visible light of colour between purple- blue and blue-green depending on the dye used.
- the composition of the invention comprises an optical brightener known as "Fluorescent brightener 220", CAS No. 16470-24-9, of general formula C40H44N12O16S4 ⁇ 4Na, IUPAC name: tetrasodium 4,4'-bis[[4-[bis(2-hydroxyethyl)amino]-6- (4- sulphonatoanilino )-1,3,5-triazin-2-yl]amino]stilbene-2,2'- disulphonate] .
- fluorescent brightener 220 known as "Fluorescent brightener 220”
- CAS No. 16470-24-9 of general formula C40H44N12O16S4 ⁇ 4Na, IUPAC name: tetrasodium 4,4'-bis[[4-[bis(2-hydroxyethyl)amino]-6- (4- sulphonatoanilino )-1,3,5-triazin-2-yl]amino]stilbene
- composition of the invention is in liquid form, with a pH ranging from 6 to 8, a specific weight of approximately 1 g/ml and boiling point of approximately 100°C.
- composition of the invention is preferably prepared as follows .
- the particles of titanium dioxide are dispersed in distilled water, in particular by means of a cowles toothed disc disperser.
- nanometric particles of titanium dioxide are used as starting material, having dimensions smaller than approximately 10 nm, preferably approximately 4-6 nm, in particular approximately 5 nm.
- the nanometric particles aggregate into larger aggregate particles, having the dimensions defined above.
- the preparation process comprises a mixing step in which Ti02 nanometric particles, having dimensions smaller than 10 nm, are mixed in distilled water, in particular by means of a disperser provided with at least one impeller, in particular a cowles toothed disc disperser, i.e. having at least one impeller provided with a toothed disc.
- the mixing step comprises a first dispersion step carried out with a first rotation speed of the impeller disperser; and a second dispersion step carried out with a second rotation speed of the impeller disperser, greater than the first rotation speed; the two dispersion steps can have different durations, approximately every few minutes, also depending on the respective quantities of titanium dioxide and water.
- the mixing speed is generally around 250-300 rpm.
- the speed is increased in a second dispersion step, for example at 300 rpm.
- the dispersion temperature is approximately 50-60°C, in particular a first dispersion step is carried out at approximately 50-54°C, then a second dispersion step at approximately 60-65°C.
- an emulsifying system having Hydrophilic-Lipophilic Balance (HLB) of approximately 7.
- HLB Hydrophilic-Lipophilic Balance
- the emulsifying system contains an emulsifier of an anionic/non-ionic nature.
- the emulsifying system is for example used in an amount approximately equal to 15% with respect to titanium dioxide.
- the process is preferably carried out under vacuum, with a vacuum time of approximately 30 min at a negative pressure of approximately 0.3 bar.
- compositions according to the invention which prove in particular to possess a powerful sanitizing and bactericidal action.
- test results confirm the photocatalytic activity of the compositions of the invention and attest to a significant antimicrobial activity. As reported in the literature, these data can be generalized to the most common pathogens present in the environment.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2019/057988 WO2021053379A1 (en) | 2019-09-20 | 2019-09-20 | Sanitization composition and method for sanitization- purification of surfaces and environments |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4031645A1 true EP4031645A1 (en) | 2022-07-27 |
Family
ID=68501867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19801093.6A Pending EP4031645A1 (en) | 2019-09-20 | 2019-09-20 | Sanitization composition and method for sanitization- purification of surfaces and environments |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4031645A1 (en) |
WO (1) | WO2021053379A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2729673A1 (en) * | 1995-01-25 | 1996-07-26 | Rhone Poulenc Chimie | DETERGENT COMPOSITION CONTAINING TITANIUM DIOXIDE WITH BACTERICIDAL AND PHOTO-OXIDIZING FUNCTION |
GB2358638A (en) * | 1999-12-22 | 2001-08-01 | Reckitt & Colmann Prod Ltd | Cleaning compositions |
JP2003135572A (en) * | 2001-08-20 | 2003-05-13 | Menicon Co Ltd | Disinfecting method |
ITFI20060030A1 (en) * | 2006-02-01 | 2007-08-02 | Colorobbia Italiana Spa | PROCESS FOR THE PREPARATION OF AQUATIC DISPERSIONS OF TI02 IN THE NANOPARTICELLE FORM AND DISPERSIONS OBTAINABLE WITH THIS PROCESS |
GB2550902A (en) * | 2016-05-27 | 2017-12-06 | Thymos Ltd | Self-sanitising compositions and method for the production thereof |
US11597657B2 (en) * | 2018-05-02 | 2023-03-07 | Colorobbia Consulting S.R.L. | Nitrogen-doped TiO2 nanoparticles and the use thereof in photocatalysis |
-
2019
- 2019-09-20 EP EP19801093.6A patent/EP4031645A1/en active Pending
- 2019-09-20 WO PCT/IB2019/057988 patent/WO2021053379A1/en unknown
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