RO120648B1 - Concentrated disinfectant detergent for hard surfaces - Google Patents

Abstract

The invention relates to a concentrated disinfectant detergent for hard surfaces of the sandstone, plastics, reusable glass, medical equipment type, consisting of 17...25% nonylphenol ethoxylated with 9 moles of ethylene oxide, 40...50% aqueous solution of biguanid polyhexamethylene, 20...26% aqueous solution of benzalkonium chloride and 0.1...1% perfume.

Description

The invention relates to a disinfectant detergent, concentrated, for hard surfaces, in the form of an aqueous solution, intended for washing and disinfection of surfaces such as tiles, faience, cement, plastics, reusable bottles, non-absorbent painted material, from sanitary units and industrial factories. food, washing and disinfection of medical instruments and medical laboratory equipment, as well as cleaning the mold and preventing its occurrence.

in the food industry, on the surfaces that come in contact with food, there are food residues and microorganisms that impede the smooth running of the production process and can contaminate the products; In the sanitary units, on the surgical instruments, in the salons and cabinets of clinics and hospitals there are also dirt and pathogens that can contaminate the environment and cause infections, thus compromising the provision of medical assistance.

The hygiene process in these situations with specific requirements consists of two stages: cleaning and disinfection.

Cleaning is the process of physical removal of dirt adhered to surfaces by mechanical adhesion, van der Waals forces or electrostatic adhesion. This process can be a physico-chemical reaction by reaction between detergent and dirt, or a physical one only, by solvating or emulsifying the particles of dirt. During the cleaning process, all residues are supposed to be removed, resulting in the removal of the food from the microorganisms. Next to this, most bacteria are removed, in proportions of 90 ... 99.9%, depending on their type.

The intermediate rinse removes the residual detergent and the coarse dirt on the surfaces, these appear optically clean, but in reality there are still many microorganisms that represent a risk of infection.

The final disinfection has the role of completely annihilating the microorganisms still present on the targeted surfaces, by reducing these microorganisms from 1 ... 0.1% left over from the previous stage, to 0.001%. After the final rinse with water the surfaces are technically sterile.

The usual detergent-disinfectant compositions consist of two distinct elements, which complement each other:

- a surfactant with a cleaning role (anionic, non-ionic or cationic surfactants with / without the addition of oxidants, complexing agents, antifoams, optical bleachers, etc.);

- a disinfectant (amines, iodine, free chlorine, aldehydes, quaternary ammonium compounds, biguanides, oxygenated water, peroxyacetic acid, mono- and poly-hydroxyl alcohols: isopropyl, propylene glycols, etc.).

The usual requirements when creating such a system are:

- for the cleaning agent: to clean properly, to be efficient on a large number of deposits and over a maximum pH range, to be compatible with all the standard materials used in the manufacture of the machines, to have a low foaming power, to be biodegradable;

- for the disinfectant: to have a wide range of action, not to attack the surfaces to be treated, to have a good stability in both concentrated and diluted form, to be active on a range of as high as pH, to have low toxicity .

A disinfectant detergent consisting of sodium salt and triethanolamine is known from the sulfosuccinic monoester of the alkylphenolpoliglycololeter with 6 oxyethylene groups, betaine with C ₁₂ -C ₁₄ chain, isopropyl alcohol, formaldehyde, benzaldehyde (R0114629). However, it has a limited scope and requires its use in a relatively high concentration.

RO 120648 Β1

There is also known a concentrated liquid detergent, with decontaminating effect, constituted 1 based on a synergistic mixture of anionic and nonionic surfactants containing chloramine (RO 114628), but this also has the disadvantage of a restricted area of 3 uses, as well as that of at a low pH range (5 - 8).

The technical problem that the invention solves is to determine the components related to the detergent and their proportions, so that a stable, homogeneous, isotropic liquid system is formed. 7

The disinfectant detergent, concentrated, according to the invention, removes the disadvantages mentioned in that it consists of 17 ... 25%. preferably 19 ... 21%, ethoxylated nonylphenol 9 with 9 moles ethylene oxide, 40 ... 50%, preferably 44 ... 47% polyhexamethylene biguanide hydrochloride as a 20% aqueous solution, 20 ... 26 %, preferably 21 ... 23% 11 benzalkonium chloride as aqueous solution 50%, 0.1 ... 1% preferably 0.2 ... 0.4% perfume composition and 5 ... 20% water. 13

The detergent is in the form of an aqueous solution.

The detergent according to the invention has the following advantages: 15

- it is combined into a single product, which acts synergistically, the cleaning agent and the disinfectant, thus eliminating the use of two distinct products that raise compatibility issues.

- the costs of transport and labor are reduced and work solutions are easily obtained, with 19 low concentrations, by dilution with water;

- it has a wide range of use, both by the use of bactericides with a broad spectrum of 21 actions, and by the fact that it is effective over a high pH range (2-12);

- is an ecological product with good biodegradability; 2. 3

- has very low toxicity;

- does not attack the surfaces, being compatible with the usual materials of their manufacture. The following is an example of an embodiment of the invention.

In a reaction vessel, provided with a stirring, heating and temperature control system, 20 kg nonylphenol ethoxylate 9 moles OE is charged and the heating is started, under slow agitation. When the temperature is reached 35 ... 40 ° C, turn off the heating and slowly add, under 29 stirring, 45 kg polyhexamethylene biguanid hydrochloride concentration 20%, then 22 kg benzalkonium chloride concentration 50%, 0.2 kg perfume and continue mixing. After about 31

20 ... 30 min. Slowly stir, under stirring, 10 L of water. After another 20 minutes, control the pH and correct it with citric acid to the value 5.5 ... 6.5. 33 rest of water is added, up to a total mass of 100 kg, and finally, the dye. It is left for homogenization still approx. 15 min under stirring. The product in the container is packaged according to the 35 technical documentation. If the product is cloudy, 11 isopropyl alcohol is gradually added, up to 6% (weight percent) of the product quantity. 37

The product is used as a solution of concentration 0.15 ... 0.5% detergent in hot or cold water. In this interval, the exact dosage depends on the purpose pursued and the degree of dirt. The solution is applied to hard surfaces: tiles, tiles, porcelain, plastics, etc., by wetting, spraying or other methods. It is advisable to clean 41 surfaces in advance to remove residues. The minimum contact time with the detergent solution should be 15 minutes, after which it should be abundantly washed with water. 43

Claims (4)

1 Claim 3 Disinfectant detergent, concentrated, for hard surfaces, in the form of aqueous solution, characterized in that it is composed of 17 ... 25%. preferably 19 ... 21%, 5 ethoxylated nonylphenol with 9 moles of ethylene oxide, 40-50%. preferably44 ... 47% polyhexamethylene biguanid hydrochloride as aqueous solution 20%, 20 ... 26%, preferably 21 ... 23% 7 benzalkonium chloride as a 50% aqueous solution, 0.1 ... 1%, preferably 0.2 ... 0.4% perfume composition and 5 ... 20% water.