LONG-ACTING AEROSOL CLEANER AND GERMICIDE

Abstract

Cleaning and disinfection product that resolves the problem of the droplet size in the spray and, therefore improves the effectiveness of the product for which, in aerosol format and with a propellant that is a liquefied petroleum gas, the valve allows a discharge rate of 0.2 g/s to 4 g/s and the composition of the liquid for propelling, without the propellant, comprises, ethanol or isopropanol between 60% and 90% with the rest, up to 100%, propylene glycol up to 100%, it being possible to optionally incorporate a fragrance up to 5%, in which case the propylene glycol content is conveniently reduced. In the total amount of product, including the propellant, the propellant accounts for between 10% and 30% of the weight.

Claims

1. Cleaning and disinfection product characterised in that: a. It has the format of an aerosol product. b. The propellant gas is liquefied petroleum gas. c. The valve allows a discharge rate of 0.2 g/s to 4 g/s. d. The composition of the liquid contained in the container, with the exception of the propellant, when activating the valve consists of in percentage by weight: i. Ethanol or isopropanol between 60% and 90%. ii. Propylene glycol up to 100%. iii. Optionally, a fragrance up to 5%, in which case the propylene glycol content is conveniently reduced to reach 100%. e. The amount in percentage by weight of propellant gas within the container relative to 100% of the weight of the interior of the container is greater than 10%, preferably at least 30%.

2. Cleaning and disinfection product according to claim 1, further characterised in that the only compound with recognised biocidal activity in accordance with the guidelines of the Food and Drug Administration of the United States is ethanol and it lacks any solid biocidal compound at room temperature except for thymol and menthol as part of the fragrance.

3. Cleaning and disinfection product according to claim 1, characterised in that: a. The fragrance contains at least one compound chosen from: thymol, linalool, citral, menthol, lavandin, geraniol, eucalyptol.

4. Cleaning and disinfection product according to claim 1, characterised in that the average particle size of the aerosol it creates is between 5 μm and 100 μm.

5. Cleaning and disinfection product according to claim 1, characterised in that there are at least 10% of droplets in the aerosol that it creates with a particle size of less than 50 μm.

6. Surface disinfection process characterised in that it uses an aerosol product according to claim 1.

7. The use of propylene glycol combined exclusively with ethanol and/or propanol and a fragrance as a disinfecting agent and air and surface cleaner to prolong the contact time of ethanol and/or propanol with germs or dirt, for a concentration of propylene glycol with respect to the total liquid of at least 20%, preferably of at least 28%.

Description

EXAMPLE 1, ACCORDING TO THE INVENTION

[0030] A formulation is prepared containing by weight:

[0031] 65% propylene glycol, technical grade

[0032] 35% completely denatured ethanol, technical grade (<1% water)

[0033] It is contained in a transparent PET can to be able to observe the separation of phases, adding 50% by weight of the biocidal mixture and 50% of liquefied petroleum gas.

[0034] It is also contained in a tin can of 0.18 mm thickness and 750 mL capacity (inner epoxy Gold resin supplied by Colep, Portugal) to be able to observe the stability to corrosion over time. (6 samples)

EXAMPLE 2, NOT ACCORDING TO THE PRESENT INVENTION

[0035] Formulation according to Example 43, Table 13 of US 2009018213 A1 21.88% water

[0036] 74.1% ethanol

[0037] 1.88% polyquaternium-2 Acid

[0038] 1.6% PEG-10 dimethicone

[0039] 0.54% PEG-12 dimethicone

[0040] It is contained in a transparent PET can to be able to observe the separation of phases, adding 50% by weight of the biocidal mixture and 50% of liquefied petroleum gas.

[0041] It is also contained in a tin can of 0.18 mm thickness and 750 mL capacity (inner epoxy Gold resin supplied by Colep, Portugal) to be able to observe the stability to corrosion over time. (6 samples)

EXAMPLE 3, NOT ACCORDING TO THE PRESENT INVENTION

[0042] 60% water

[0043] 5% propylene glycol, technical grade

[0044] 35% completely denatured ethanol, technical grade (<1% water)

[0045] It is contained in a transparent PET can to be able to observe the separation of phases, adding 50% by weight of the biocidal mixture and 50% of liquefied petroleum gas.

[0046] It is also contained in a tin can of 0.18 mm thickness and 750 mL capacity (inner epoxy Gold resin, supplied by Colep, Portugal) to be able to observe the stability to corrosion over time. (6 samples). In this case, a valve with a very small discharge rate was selected to prevent Petri dishes from over-flooding in the activity assay (discharge rate 0.05 g/s).

[0047] For distribution and residence assays of biocidal liquid, 5 adjacent Petri dishes (90 mm×14.2 mm) are arranged in a line, previously inoculated with a Candida sp. own culture from previous assays of plastic polymer decomposition experiments, and with standard potato-agar-dextrose culture medium, and the central dish is sprayed for one second. They are left covered, allowed to dry and put in the stove at 37° C. for 7 days. Additionally, two control dishes are placed at the ends, one on each side of the central point of the assay.

[0048] Experiments performed with the 3 examples.

[0049] 1. Observation of Phase Homogeneity in PET Aerosol can Example 1 shows after stirring that the phases are mixed and remain stable. Example 2 shows after stirring that the phases are partially mixed and the formulation is stable but after 18 days of observation at room temperature a certain separation of water is seen at the bottom of the can.

[0050] Example 3 shows after stirring that the phases do not mix and there is a clear difference between the liquefied gas phase of the oil and the water phase which appears completely separated in approximately the end quarter of the can.

[0051] 2. Observation of the Stability of Tin Cans in a 50° C. Oven for 3 Months

[0052] Example 1 shows that the 6 cans remain without any leaks after the 3 month stability period.

[0053] Example 2 shows after one month and one week, 2 cans have leaks in the bottom seam (triple point) of the can. In the two month review, the remaining four cans remain stable; however, after two months and two weeks the remaining four cans are all leaking. The probable reason is the need for a greater epoxy resin coating due to the presence of water and, in addition, the possible effect on the corrosion of polyquaternium-2 acid.

[0054] Example 3 shows after one month that all the cans have leaked, showing a high degree of corrosion at the triple point of the can.

[0055] 3. Observation of Antimicrobial Capacity

[0056] Example 1 shows that the central dish and its two adjacent dishes did not show growth of Candida sp. yeasts, while in the two dishes furthest from the central dish—except for the controls—the growth occurred only partially at the ends furthest from the central point of the experiment. Control dishes showed considerable growth of Candida sp.

[0057] Example 2 shows that the central dish and its two adjacent ones did not show growth of Candida sp. yeasts, while in the two dishes furthest from the central dish—except the controls—the growth occurred only partially at the ends furthest from the central point of the experiment, as in Example 1. Control dishes showed considerable growth of Candida sp.

[0058] Example 3 shows that the central dish did not show yeast growth Candida sp., while in the two adjacent dishes isolated colonies could be seen, unlike the two previous examples. In the two dishes furthest from the central one—except for the controls—growth occurred to a greater extent than in Examples 1 and 2.

[0059] This, we believe, has an explanation that corresponds to the object of the present invention: in the place of the spraying, the liquid concentration of the three examples is sufficient to eliminate all the yeasts. In the two adjacent dishes, the evaporation time is already very relevant, if it has water it does not have so much time to cover the whole dish because the ethanol evaporates too quickly. And that effect is seen more in the furthest away dishes (excluding controls).

[0060] The growth in the dishes treated in Examples 1 and 2 is very probably due to the fact that the spray cone did not completely cover all the dishes.

[0061] The effect provided by propylene glycol (longer evaporation time) is not relevant compared to Example 2, since it carries biocide that does not evaporate and are solid at room temperature.

[0062] What is gathered from the assay is that the formulations according to our invention allow a longer contact time compared to those that, instead of propylene glycol, carry water, increasing the biocidal capacity. On the other hand, for aerosols in tin cans, our invention allows a greater durability of the can than when water and/or compounds with corrosion capacity, especially ionic that accelerate the oxidation/reduction processes of the tin metal, are added. In addition, the absence of solid elements in the aerosol biocidal compositions object of the present invention avoids the problem of possible allergies to ionic biocides that may exist when inhaled in excess.