Present invention relates to deodorants and disinfectants, in particular to a means for neutralizing (eliminating) the unpleasant odor from the toilet, which is used without rinsing with water.

The problem of unpleasant odors in facilities where people are inside, such as work rooms or private houses, is constantly occurring.

This is especially true of sanitary facilities, bathrooms, toilets, which are a mandatory element of any private house, hotel, long-distance vehicles, restaurants and entertainment centers, theaters and cinemas, etc. Usually that are social, professional and educational premises, where a certain number of people regularly present: offices, enterprises of various profiles, schools, medical institutions, etc., that are equipped with toilets. The smell of the toilet is unpleasant for users, its presence affects the overall impression of the institution, the same applies to the attractiveness of private housing.

The easiest way to avoid the smell of urine in the toilet - frequent draining of water in the toilet. However, there is a well-known problem of lack of fresh water, which is increasingly approaching humanity on a global scale. In addition, large volumes of wastewater, in particular from the drainage system from sanitary facilities of enterprises of various profiles and the residential sector, despite the high cost of treatment, have a negative impact on the environment. It should also be noted that from time to time there are emergencies in the water supply system, repair work on water mains and houses, which involves turning off the water for a period of several hours to several days, which makes it impossible to drain the toilet during this period. In some cases, noise from the drain system can interfere with residents during meetings, distance learning or recreation.

So, there is a problem how to overcome the unpleasant odor in the bathroom with minimal water consumption for drainage.

It should be noted that the mentioned unpleasant odor in the toilet is mainly due to the presence in the toilet of such a product of human excrement as urine, in particular a component of urine - urea.

From the prior art it is known a number of technical solutions aimed at finding ways and means for processing (transformation) of sewage in the toilet with minimal water consumption.

Thus, in the document W02002095148, 28.11.2002 disclosed biodegradable hermicidal and water-saving formulation for toilets, represented by a composition of powder or granules packaged in sachets, that disintegrating on contact with water and containing benzalkonium chloride, tripolyphosphate sodium sodium and silicon dioxide. This bag is placed in the toilet, where it acts as a bactericide, suppressing odors, without the need to rinse the toilet with water.

The disadvantage of this technical solution is that such a component of said composition as benzalkonium chloride can cause the user allergic reactions and contact dermatitis. In addition, the formulation of the composition is aimed at destroying bacteria in wastewater, but does not eliminate the direct cause of the unpleasant odor - urea, which actually causes the unpleasant odor. The powder form of the composition is also a disadvantage. It is clear that the sachet, which contains a metered amount of the composition, can be damaged during transportation and storage. Accordingly, its contents may spill out and the user will inhale the chemicals that are part of the composition.

Another patent application JP2004203818, 22.07.2004 describes an antimicrobial deodorizing agent for a water-saving toilet and a method of antimicrobial deodorizing treatment. Intended for water-saving toilet an antibacterial deodorant consists of an aqueous solution containing a biguanide antibacterial component and a surfactant. The antibacterial component consists of polyhexamethyl enebiguanide hydrochloride in an amount of from 2% to 10% by weight or more, and the surfactant includes one or more epitaxial, nonionic or amphoteric surfactants as main components up to 50% by weight of antibacterial and deodorant means for water-saving toilets, in which the weight ratio of antibacterial component and surfactant is in the range from 1 : 5 to 5: 1. The means may also contain a plant extract in an amount of 1% to 40% by weight based on the total weight of the deodorizing agent.

The disadvantages of the above technical solution is the use of polyhexamethylenebiguanide hydrochloride as an antibacterial component. When said component is inhaled constantly it causes necrotic bronchial lesions, leading to inflammation and pulmonary fibrosis both experimental animals and humans due to special sensitivity of bronchi at concentrations even less than 2 ppm (2 mg/1). In addition, said antimicrobial deodorant is represented in the form of a solution that is not convenient and is intended for use in a specially designed water-saving toilet, which limits its use.

Thus, known means for eliminating odors from the toilet are made in the form of powder or solution, which have the above disadvantages: inconvenience and certain limitations in use.

The inventors of the present invention have proposed to produce a bactericidal deodorizing agent in a compact solid form of small size, convenient to use, namely in the form of tablets, to eliminate odor in the toilet.

The tablet form for water purification is widely used in industry.

From the prior art known patent document CN106032293, 19.10.2016, which discloses convenient to carry tablets for purification of drinking water in the field. As indicated in this document, the subject matter of the patent is a tablet for coagulation, a tablet for disinfection and a tablet for chlorine removal, wherein the tablet for coagulation contains 78-83% polyaluminum chloride, 10-15% sodium bicarbonate and 7-10% succinic acid; disinfectant tablet contains 15-20% sodium dichloroisocyanurate, 42-45% sodium bicarbonate, 25-28% succinic acid and 8-12% boric acid; chlorine removal tablet consists of 70-78% sodium sulfite, 2-5% polyvinylpyrrolidone, 12- 15% sodium bicarbonate and 5-10% succinic acid. According to the present invention, the contaminated water is made drinkable in the field by coagulation, disinfection and removal of chlorine.

The disadvantage of this technical solution in the context of the claimed invention is that these tablets are in no way associated with overcoming the unpleasant odor in the bathroom with minimal water consumption for draining.

Also known document WO 1996032194, 17.10.1996, which presents the composition in a standard dosage form for periodic purification of a small predetermined volume of contaminated drinking water. The composition includes: (a) an organochlorine compound that serves as a disinfectant and sanitary agent; (b) a solid inorganic metal salt having a trivalent cation and serving as a coagulant-precipitating agent; (c) a solid alkali which is readily soluble in water and very effervescent in the presence of an acid which is used as a dispersing buffer agent; (d) a solid anionic polymer hydrophilic primary colloidal flocculant; (e) a solid cationic polymeric hydrophilic secondary colloidal flocculant; (f) long-fiber cellulose serving as an agglomeration matrix and a pre-filter for absorbing flakes and trapping visible debris and cysts; and (g) a bulk ion exchange absorbent.

As in the previous document, the disclosed product is not designed to be used for disinfection and destruction of odors in the toilet.

Document W02007107434, 27.09.2007 describes a composition of tablets for purifying contaminated water to make it drinkable. In particular, the invention relates to highly stable tableted compositions for water purification, which decompose easily and quickly when dispersed in water. The tableted composition for water purification consists of a solid disinfectant containing chlorine and swelling clay.

This composition is also not designed to be used to eliminate odors in the toilet.

The closest analogue of the claimed invention is a technical solution described in patent application CN 106614747, 10.05.2017. The application discloses a disinfectant tablet containing a protease for the toilet. The disinfectant tablet also consists of from 20 to 30 percent chlorine dioxide, 1 to 3 percent coating passivators, 15 to 20 percent desiccants, 30 to 40 percent foaming agents, 25 to 40 percent acidifiers, 1 up to 5 percent of sustained release substances, from 1 to 5 percent of surfactants and from 1 to 3 percent of biologically active enzymes. The developers of the disinfectant tablet, which contains a toilet protease, believe that it has the following advantages: it is very convenient to use; active substances can be released stably and quickly; the tablet has a strong ability to decompose harmful substances such as bacteria, viruses, chemical toxicants and residual pesticides, thus achieving the efficiency of sterilization and air purification; no pollution; favorable protection of the ecological environment; high stability; environment protection; no toxicity; easy to use. The disinfectant tablet can be widely used in all fields such as medicine, industry, agriculture and livelihoods.

Although this technical solution is the closest prior art for the present invention, it has a number of significant disadvantages. In particular, this tablet has a rather complex formulation (composition), which makes the drug time consuming in production. Taking in account the specified concentration of chlorine dioxide, frequent use of this tablet will not be completely safe for consumers, as noted by the inventors. Further, the enzyme used is referred to as a protease, but proteases belong to at least six groups that differ in the structure of the active site of the enzyme: serine, threonine, cysteine, asparagine, metalloproteases and glutamine, respectively, each has specific biological activity. Therefore, if the inventors use all groups of enzymes, it is not rational in terms of their specific action, and if they use certain, it is not clear what type of protease was used and what compounds it affects. In addition, the tablet has no deodorizing effect.

Summary of the invention

The problem to which the present invention is directed, is to provide a means of neutralizing odor from the toilet due to the agent with a deodorizing and disinfecting effect, made in the form of a tablet, without draining the water.

The technical result to be achieved in the implementation of the proposed technical solution is the destruction (removal) of odor from the toilet (the lavatory pan) due to the presence of urea, using a special tablet with deodorizing and disinfectant effect without draining the water during some time.

The present invention is based on data from human physiology and biochemistry. Namely, human urine is a type of excrement, a product of human life, excreted by the kidneys; 91-96% of it consists of water and contains nitrogenous breakdown products of proteins: urea, uric and hippuric acids, creatinine, xanthine, urobilin, indican, as well as salts, in particular chlorides, sulfates and phosphates. If the vast majority of urine components are present in it in small amounts, the urea content of a healthy person is about 10 times higher. Accordingly, the presence of urea in the urine excreted from the body causes an unpleasant odor from the lavatory pan and toilet in general.

Based on the above facts and user needs, the inventors have proposed a composition with a deodorizing and disinfecting effect that dissolves quickly to eliminate odors from the toilet. The main active ingredient of the claimed composition is the enzyme protease, which catalyzes the breakdown of urea and, thus, eliminates the cause of odor in the toilet.

Additionally, the means contains a complex of substances: sodium bicarbonate, citric acid, surfactant, which promote the dissolution and distribution throughout the volume of the solution (in the toilet) of the main active substance - protease due to the foaming effect.

In order to soften the water, EDTA disodium (Trilon B) was added to the product. It allows the tablet to dissolve quickly in the liquid, and the means is evenly distributed throughout the volume of the liquid to be treated and reliably neutralize urea, thus eliminating the unpleasant odor.

The proposed means includes sodium percarbonate as a disinfectant, bactericidal and decontaminating component of the composition.

Additionally, the means according to the invention contains a dye that gives the dissolved agent a pleasant color.

In addition, a fragrance component in dry form is added to the composition.

In a preferred embodiment of the present invention, as the protease is used the enzyme urease - a hydrolytic enzyme from the group of amidases, characterized by the specific property of catalyzing the hydrolytic cleavage of urea into carbon dioxide and ammonia. Any other target enzyme also can be used.

Also in a preferred embodiment of the invention sodium lauryl sulfate is used as a surfactant. However, it is possible to use any other suitable surfactant.

In the preferred embodiment of the present invention, the dye "Diamond Blue" is used as the dye, which gives the dissolved means a pleasant blue color. Also it is possible to use any other suitable dye for these purposes.

Also in a preferred embodiment of the present invention, the "Ozone" fragrance is used in dry form. In addition, it is possible to use any other suitable fragrances, such as: fragrance "Perfume", fragrance "Aloe Vera lemongrass", fragrance "Marine", fragrance "Breeze", fragrance "Lavender", or other suitable fragrance, as well as fragrances with hypoallergenic properties.

According to the presented technical solution (composition), the enzyme protease (urease) can be used in the concentration range of 2-6 wt. %, preferably 4-5 wt. %, more preferably 5 wt. %.

In the foaming complex, sodium bicarbonate is used in an amount of 33-50 wt. %, preferably 33-45 wt. %, more preferably 33 wt. %; citric acid is taken in an amount of 30-40 wt.%, preferably 25-35 wt. %, more preferably 31.53 wt. %; the surfactant is used in an amount of 15-25 wt. %, preferably 16-20 wt. %, more preferably 18.7 wt. %.

Disodium EDTA (Trilon B) in the proposed means is used in an amount of 0.5-1.5 wt. %, more preferably 1.0 wt. %. Sodium percarbonate as a component with disinfectant properties is included in this means in the amount of 7-15 wt. %, preferably 8-12 wt. %, more preferably 10 wt. %.

The dye is included in the means in an amount of 0.03-0.1 wt. %, more preferably 0.07 wt. %.

The fragrance in the means was 0.3-1.0 weight. %, more preferably 0.7 wt. %.

The inventors conducted a series of experiments and tests on the form of presentation of this composition (powder composition from a set of ingredients, liquid and tablet). Studies have shown the greatest effectiveness of the composition in tablet form. The tablet enters the liquid, dissolves and releases from the composition a protease, that comes into contact with urine. To ensure that the protease molecules are rapidly distributed throughout the liquid volume and do not accumulate in one place and form separate complexes, the composition was provided with a mixture of sodium bicarbonate and citric acid in combination with anionic surfactants (sodium lauryl sulfate). This mixture has a disinfecting and cleansing effect and promotes effective foaming in contact with water. Accordingly, protease (urease) molecules are rapidly distributed throughout the volume and effectively destroy the components of urine. Due to the relatively high concentration of protease and anionic surfactants, the composition has a prolonged effect. In addition, the preparation in the form of tablets contains a clear dosage amount of substances than, for example, bulk packaging, where the individual components accumulate and disrupt the content of components in a single dose. This formulation owing to its properties, due to the composition of the components, shape and size of the tablet can be introduced into the lavatory pan both before and after the toilet visit.

To prepare tablets in accordance with the proposed means, all its components were thoroughly mixed evenly, formed into tablets by compression, dried and placed in a package.

The following is information confirming the possibility of carrying out the invention (examples), which, however, does not limit the possible embodiments of the proposed technical solution.

EXAMPLES

Example 1

To prepare the composition, said components were taken in the given weight ratios. The tablets were then mixed and formed by compression.

Table 1

Component Amount, wt. %

Sodium bicarbonate 30,00

Citric acid 40,00

Sodium percarbonate 10,00

Disodium EDTA (Trilon B) 0,5

Sodium lauryl sulfate 15,00

Urease (dry) 4,00

Dye "Diamond Blue" 0,2

Fragrance “Ozone” (dry) 0,3

Total amount, % 100,00 Example 2

Said components were taken in the given weight ratios and formed into tablets as in Example 1.

Table 2

Component Amount, wt. %

Sodium bicarbonate 35,00

Citric acid 30,00

Sodium percarbonate 12,00

Disodium EDTA (Trilon B) 1 ,5

Sodium lauryl sulfate 16,5

Urease (dry) 4,00

Dye "Diamond Blue" 0,1

Fragrance "Perfume" (dry) 0,9

Total amount, % 100,00 Example 3

Said components were taken in the given weight ratios and formed into tablets as in Example 1.

Table 3

Component Amount, wt. %

Sodium bicarbonate 55,00

Citric acid 20,00

Sodium percarbonate 7,00

Disodium EDTA (Trilon B) 0,5

Sodium lauryl sulfate 15,00

Urease (dry) 2,00

Dye "Diamond Blue" 0,03

Fragrance "Aloe Vera lemongrass"

(dry) 0,47

Total amount, % 100,00 Example 4

Said components were taken in the given weight ratios and formed into tablets as in Example 1.

Table 4

Component Amount, wt. %

Sodium bicarbonate 35,00

Citric acid 30,00

Sodium percarbonate 15,00

Disodium EDTA (Trilon B) 1 ,4

Sodium lauryl sulfate 15,00

Urease (dry) 3,00

Dye "Diamond Blue" 0,1

Fragrance "Marine" (dry) 0,5

Total amount, % 100 Example 5

Said components were taken in the given weight ratios and formed into tablets as in Example 1.

Table 5

Component Amount, wt. %

Sodium bicarbonate 35

Citric acid 20

Sodium percarbonate 11 ,4

Disodium EDTA (Trilon B) 1 ,5

Sodium lauryl sulfate 25

Urease (dry) 6

Dye "Diamond Blue" 0,1

Fragrance "Breeze" (dry) 1

Total amount, % 100,00 Example 6

Said components were taken in the given weight ratios and formed into tablets as in Example 1.

This example shows the weight ratios for the best variant of embodiment of the present invention.

Table 6

Component Amount, wt. %

Sodium bicarbonate 33

Citric acid 31,53

Sodium percarbonate 10,0

Disodium EDTA (Trilon B) 1 ,00

Sodium lauryl sulfate 18,70

Urease (dry) 5,00

Dye "Diamond Blue" 0,07

Fragrance "Lavender" (dry) 0,7

Total amount, % 100,00

Example 7

The composition in the form of tablets was added to clean water in the lavatory pan before visiting the toilet. All variants of the composition according to Examples 1-5 (Tables 1-5) showed excellent results - the drug neutralized the odor from the toilet for 6-9 hours. The best, unexpected effect was provided by the composition according to Example 6 - with a single use, the tablet acted for almost 12 hours.

Example 8

A study was conducted to confirm the obtaining of the technical result in the implementation □ of the claimed technical solution. In particular, the total number of microorganisms in 1 m of test fluid volume was determined. Sampling was performed on nutrient agar such as meat-and-peptone agar, powder nutrient agar, fishmeal extract agar. The cultures were incubated at 37 ⁰ C for 48 ± 2 h, the number of colonies grown was counted and recalculated per 1 m of test fluid volume. Analysis of the test fluid before the application of the disinfectant solution according to the invention showed the presence of an average of 10-12 colonies of microorganisms per Petri dish. After treatment of the test fluid with the solution according to the invention it was recorded the absence of growth of pathogenic and opportunistic bacteria.

Example 9

Flushing from the surface of the lavatory pan was carried out in 1, 3, 6, 9 and 12 hours after application of the tablet form according to the invention using sterile gauze napkins, size 5x5 cm, soaked in the means according to the invention. The inner surface of the lavatory pan over the border of the convex meniscus of the test liquid was carefully wiped with a gauze napkin. Also flushing from the surface of the recesses of the upper inner part of the lavatory pan was performed in 1, 3, 6, 9 and 12 hours after treatment with the means according to the invention. After sampling, a gauze napkin was placed in a wide-necked test tube or flask with saline and glass beads, shaken for 10 minutes The liquid was inoculated deep into 2 Petri dishes with meat-and-peptone agar (0.5 ml each) and into 2 tubes with 0.5% sugar broth (1 ml each). The cultures were incubated at 37 ° C for 48 hours. It was recorded the lack of growth of pathogenic and opportunistic bacteria.

Therefore, the use of the claimed invention - tablets of the means helps to remove odor (as result of presence of urea) from the toilet (the lavatory pan), due to the splitting of urea and deodorizing and disinfecting effect of this means, without draining water during the action of the means.