MXPA00008879A - Solid fungicide - Google Patents

Abstract

To provide an improved fungicide which acts directly on fungi and kills them, while also providing a newly cleaned surface by bleaching the action surface, and which can exhibit a reliable fungicidal effect and cleaning effect through safe and easy use, without waste. The fungicide is prepared so as to contain an oxidation-type bleaching agent as an effective component and a gelling agent for solidification of the bleaching agent.

Description

SOLID FUNGICIDE Field of the Invention The present invention relates to a solid fungicide which acts directly on fungi, which develop on and attack the surfaces of exterior and interior building materials, and remove them, while also providing a freshly cleaned surface. by bleaching the action surface. The fungicide of the invention can be used with particular advantages in the form of a stick fungicide housed in a container.

BACKGROUND OF THE INVENTION '"_--. ? Removal of the fungus, which develops on and attacks the surfaces of interior and exterior building materials, has been conventionally accompanied with a wide variety of different types of fungicides. Because the fungus tends to develop in large quantities, particularly in constantly wet parts, such as walls (particularly joints) REF.122764 among the tiles), of bathrooms, kitchens and laundry rooms, a number of fungicides are usually provided in the form of combinations of strong alkalis, such as sodium hydroxide with strong oxidizing agents, such as salts of hypochlorous acid , and this form is usually a liquid stored in a container, which can be absorbed by a cloth or sponge and applied to the sections from which the fungus will be removed, or if the container is a container with atomizer, an amount of the liquid is sprayed for application in these sections. Incidentally, when an appropriate amount of the liquid is used by the absorption in a separate material as the forming case, the process is laborious, since the quantity may be measured each time, and the cumbersome gloves may be damaged protecting the hands during the manipulation of the liquid. Also, when the liquid is sprayed from an atomized container as in the latter case, it has been impossible to avoid unnecessary atomization of the liquid not only in the target section from which the fungi are removed, but also in the surrounding sections, which do not require atomization.

Consequently, the method of atomizing the liquid is not only economically uneconomical, but when used in small bathrooms, kitchens and laundry rooms, the concentration of atomized fungicidal particles that float in the air increases, producing characteristic irritant odors. , which create discomfort or discomfort for the user and sometimes still result in accidents due to inhalation of particles sprayed by the user, or the spread of sprayed particles may adhere to the skin, often causing rash or rash on the skin. the skin. Rinsing type fungicides provided with felt applicators have been proposed as means to solve the problems described above. Because each of such fungicides can be used with the liquid fungicide included in the applicator, it is possible to avoid the inconvenience referred to above, and are therefore, especially noteworthy since they can prevent or reduce the incidence of accidents caused by the particles sprinkled Indeed, when the fungicide is included in an applicator, it is difficult to prevent runoff of excess liquid (dripped liquid) from the applicator. The liquid drip indicates that an excess amount of the fungicide is used, which can be economically undesirable, and can easily be seen as long as the fungicides are in such liquid forms, there will be the danger of generating chlorine gas by use in mixture. with acidic cleaning agents. Fungicides composed mainly of oxygen-based bleaching agents, particularly hydrogen peroxide, reduce the danger of gas generation by the use of mixtures with acidic cleaning agents. Such types of fungicides are often inappropriately effective in killing large amounts of fungi because hydrogen peroxide is an alkali and unstable, providing the fungicides themselves weakly acidic. That is, when they are used - fungicides composed mainly of oxygen-based bleaching agents, the operation for the removal of the fungus may be carried out more frequently. In addition, although lactic acid-based fungicides are known, which ----- do not contain bleaching components, such fungicides after removing the fungus, take the color of the fungus as a stain or soot, and so both result hard in a proper cleaning effect.

EP-A-0 651 051 discloses a bleach gel cleaner comprising an effective amount of a hypochlorite generating compound; a ternary thickener system comprising an alkali metal soap, a hydrotrope and a stable bleach solvent, each in appropriate amounts to create a gel composition; one buffer / electrolyte and the rest as water.

EP-AO 636 690 relates to a cleaning composition based on gel hypochlorite, a cross-linked polyacrylate polymer, a sufficient amount of stable bleach surfactant, in combination with said polyacrylate polymer, to result in a gel, a effective amount of a source of hypochlorite and the balance, water.

JP-A-57022102 discloses a composition consisting of a gel composed of a gelling agent, water and a solution that generates chlorine dioxide, which can be packaged in a container.

The document OA-96/22687 refers to a composition with a disinfecting action, especially a film-forming composition, or a gel, with a content of hydrogen peroxide and / or peroxyacetic acid, especially a combination of hydrogen peroxide and peroxyacetic acid .

Description of the invention Problems to be Resolved by the Invention It is an object of the present invention to overcome the aforementioned problems of the prior art by providing an improved fungicide which acts directly on the fungus and removes them, while also providing a freshly cleaned surface by bleaching of the surface of action and which can present a reliable fungicide effect and a cleaning effect through a safe and easy use, without waste or waste.

Means for Solving Problems ___ _ In accordance with the present invention, the aforementioned object can be realized by a solid fungicide characterized in that it contains a bleaching agent of oxidation type as an effective component and comprising a gelling agent for the solidification of the argente bleaching.

Preferred Modalities of the Invention - Preferred embodiments of the present invention will now be described. The present inventors, after reflecting on the fact that the aforementioned problems of the prior art are a result of the use of fungicides in the liquid form, considered that many of the advantages unimagined so far can be provided if they can be used in the solid form, and thus testing the solidification of various eirective components, we have come to the present invention. That is, the solid fungicide of the invention is characterized by the use of an oxidation type agent as the effective component and a gelling agent for the solidification of the bleaching agent. In order to carry out the invention, the oxidation-type bleaching agent used as the effective component can be any one or a combination of two or more compounds appropriately selected from those known in the field of fungicides for having excellent fungicidal and antioxidant properties. bleach. The oxidation-type bleaching agent in the fungicide of the invention has an excellent oxidizing effect, thus eliminating the fungus, while also whitening (bleached pigment) sections which have been obscured or otherwise colored by the fungus. Examples of oxidation-type bleaching agents which can be advantageously used include alkali metal salts and alkaline earth metal salts, for example, sodium salts, potassium salts and calcium salts, of halogen oxyacids, for example acids hypohalogenic such as hypochlorous acid and hypobromous acid, halogeno acids such as chlorous acid and bromic acid, and halogenic acids such as doric acid and bromic acid, with preferred examples being sodium hypochlorite, potassium hypochlorite and calcium hypochlorite. As well, other sources of chlorine such as sodium chloride, calcium chloride, potassium chloride and other chlorides, can also be added. Of the aforementioned bleaching agents, sodium hypochlorite and / or potassium hypochlorite can be more advantageously used, and the amount of sodium hypochlorite and / or potassium hypochlorite is preferably adjusted, so that the amount of available chlorine in the fungicide is at least 0.3%, and preferably so that the amount of available chlorine is at least 0.5% and less than 4.5%. Currently, if the amount of available chlorine in the hypochlorous acid salt is below 0.3%, the bleaching effect of the fungus should be inadequate; however, if the amount of available chlorine is 0.5% or more, the removal and bleaching of the fungus can be expected within a waiting time of approximately 5 minutes. Conversely, if the amount of available chlorine is increased to 4.5% or greater, it will be impossible to reach gelatin and thus to the solidification of the resulting fungicide, due to the use of the gelling agent. The use of a gelling agent in combination with the bleaching agent is essential for the fungicide of the invention. Suitable gelling agents include aliphatic carboxylic acids, and preferably alkali metal salts or ammonium salts of aliphatic carboxylic acids of 8-16 carbon atoms, and 1,2-hydroxystearic acid; These compounds can be used alone or in combinations of 2 or more. Of the aforementioned gelling agents, particularly the alkali metal salts of aliphatic carboxylic acids such as sodium stearate and sodium myristate, may be more advantageously used, and the amount of the gelling agent in the fungicide is preferably adjusted in such a manner let the amount be 0.3-20%, and more preferably 0.5-10%. Currently, if the amount of gelling agent is under 0.3%, it will be impossible to adequately maintain the solid state of the fungicide, thus making it difficult to supply the container during use. Conversely, if the amount of gelling agent is increased to 20% or more, the fungicide will "harden as well, preventing the application of an adequate amount of the fungicide to the desired areas when used, and requiring repeated applications for applying the desired amount of the effective component The fungicide of the invention may have a variety of compositions which include the aforementioned bleaching agent and the gelling agent, but preferably comprise a base, an oxidation-type bleaching agent, a gelling agent , a surfactant, a humectant, a thickener and water The base is used in the fungicide of the invention by a function of two parts, that is, to achieve the purposes of inhibiting growth of the fungus and preventing the decomposition of the agent of bleaching --of oxidation type, specifically of the metal salts of hypochlorous acid. With the invention, when the base is added to the fungicide, its amount is preferably adjusted, so that the final pH value of the fungicide is greater than 11, and more preferably in the range of 12-13. Incidentally, from the point of review of the growth inhibition d-the fungus, it is desirable for the final pH of the fungicide to be greater than 11, or even lower than 2. This is because the fungus generally presents optimal cellular activity close to pH = 5.6, can survive in more sections of substrates in the natural world with a wide pH range of 3-10, and especially- in high temperature environments (30 ° C or higher) and high humidity ( 80% RH or higher), the fungus can easily survive even in wider pH ranges of 2-11. Also, from the decomposition review point of the hypochlorous acid metal salt used as the bleaching agent, since these compounds undergo reaction decomposition more actively to near neutral, it is generally preferred by the amount of base added to be adjusted so that it occurs at a pH value in the range of 12-13. The surfactant used as necessary in the fungicide of the invention serves the purpose of improving the cleaning property, and any desired non-ionic, anionic, cationic or amphoteric surfactant can be used. Suitable surfactants which may be mentioned include, but are not limited to, the following examples: nonionic surfactants such as alkali phenols and oxid-or -de --- addition products, ethylene; nic surfactants such as alkylbenzene sulfonate, cationic surfactant such as alkyltrimethylammonium, and surfactants -anothermal talis as types of amino acids. The amount of surfactant to be added to the fungicide can be selected as desired. The humectant which can also be used if necessary, serves the purpose of preventing the drying of moisture during storage, and any common moisturizer can be used, including glycerin and polyethylene glycol. The amount of humectant to be added can also be selected as desired, depending on the need. Also the thickener is added for the purpose of complementation of the gelling property to provide spreadability which is a light, uniform distribution. Examples of thickeners which may be advantageously used in the fungicide of the invention include but are not limited to the following: org thickeners such as polyacrylic acid and polysaccharide compounds, and inorg thickeners such as synthetic mica and synthetic smectite. In order to avoid gas generation and a reduced fungicidal effect, it is necessary to select the thickener with attention not to cause an oxidation-reduction reaction with the oxidation-type whitening agent. The amount of thickener to be added can be selected as desired, depending on the need. Water is also essential in the fungicide of the invention for the purposes of permeation of the agents, for example, and the amount of water added is normally a balanced amount. The fungicide of the invention can be prepared by combining the aforementioned components in the desired manner. Preferably, a fungicidal precursor is prepared by combining all the components except the gelling agent in the desired order. Next, after adding the prescribed amount of the gelling agent to the precursor and heating to dissolution, it can be placed in a suitable structure for its preparation. Thus, a solid fungicide with a desired shape can be obtained. The fungicide of the invention is preferably provided in the solid form, and more preferably in the form of a stick. The fungicide in the form of a rod is preferably housed in a container in such a manner as to allow its gradual distribution during use. The bar may be in the form of a smaller cylinder or small prism, but it is preferably a smaller cylinder that allows for easier delivery of the container. If the bar is a smaller cylinder, its dimensions are preferably a diameter of 10-30 mm and a diameter of 50-150 mm in length for better handling capacity, but diameters of less than 10 mm can also be used if necessary for use in narrower areas from which the fungi will be eliminated. The fungicide of the invention can be applied for the removal of the fungus in the same manner as, but more readily then, than the common fungicides. For example, for the removal of the development of the fungus on the walls of the bathrooms, a prescribed amount of the fungicide is supplied from the container and applied, so that the fungicide is rubbed at the junction sections between the wall tiles . A few applications of the fungicide, such as once or twice, will normally be sufficient, but repeated applications are also possible if necessary. The fungicide can be suitably applied at a low thickness as soon as the fungicide comes into contact with the fungus. After the fungicide has been applied, it is allowed to remain to allow sufficient action in the fungus. The permanence time is necessarily only a short time, usually approximately 5-6 minutes. The progress of the fungicide effect can be easily confirmed in a visual way based on the color fading of the fungus, that is, the depigmentation of the fungus. After the color of the fungus has faded, the fungicide that adheres to the wall is removed by washing. An advantage of the fungicide of the invention is that it can be easily removed by washing with water alone, and in particular, washing with water can be advantageously accompanied by the spraying of lukewarm water into the sections applied with a shower or the like. Subsequent drying can be achieved by leaving the sections to remain. When carrying out the invention, it is advisable to pre-apply running water or warm water or humidity to the sites where the fungus has developed, thus allowing the fungicide to permeate the narrowest sites where the fungus has developed, for more effective removal of the fungus. Also, after the fungus has disappeared, the series of fungicidal operations are completed by washing with water, but in order not to ensure residual fungicide and until the accelerated completion of the washing, it is advisable to consider the amount of gelling agent and thickener added, and in some cases, additionally using a water soluble polymer, which can provide a solution effect of complementation in water.

EXAMPLES The present invention will now be further explained, by means of the examples. It is noted in the samples of fungicides produced in the examples, that examples 2-1, 2-5, 2-6, 2-7, 3-1, 4-10 and 4-11, each represents a comparative example.

Example 1 The following reactive grade compounds were combined in the indicated amounts. Sodium hypochlorite (available chlorine = 5%) 41.10% by weight Sodium hydroxide 0.9% by weight Sodium stearate 4.7% by weight Sodium myristate 4.7% by weight Water 48.7% by weight The resulting mixture was placed in a container of glass (commercially available mayonnaise bottle, washed) and heated to 80-90 ° C. After completely dissolving the total amounts of sodium stearate and sodium myristate, the resulting viscous liquid was packed in a plastic container preheated in a rubber bar oven having an internal diameter of 21 mm and a depth of 50 mm, and allowed to cool to room temperature. A solid fungicide in the form of stick (available chlorine = 2.05%) was thus obtained. The resulting fungicide was finely applied to tile-rich fungal joints in a bathroom and allowed to stand for 5 minutes. After application of the fungicide, the color of the fungus gradually faded, becoming virtually colorless after 5 minutes. After spraying the warm water from a watering can at the sites where the fungicide has been applied, complete washing and removal was possible without the residue of the fungicide.

Example 2 Seven solid fungicides in the form of stick were prepared by mixing reactive grade sodium hypochlorite (available chlorine = 5%), reactive grade sodium hydroxide, reactive grade sodium myristate, synthetic smectite (trade name: SWN) , product of Cope Chemical Co.), reactive grade polyethylene glycol (average molecular weight: 1000) and water in the amounts (grams) listed in Table 1 below, in accordance with the procedures described in detail below. As shown in Table 1 below, the resulting fungicide samples 2-1 to 2-7 differ in their available chlorine contents (%).

Table 1 * comparative example First, the aqueous solution of sodium hypochlorite, sodium hydroxide and synthetic smectite were added in their prescribed amounts to the prescribed amount of water, and mixed after placement in a glass container (commercially available mayonnaise bottle) , washed). The solutions were obtained with each of the components dissolved here. For the preparation of fungicide sample 2-1, subsequent preparation steps were omitted, since the completely uniform dissolution of the components can not be achieved at this stage. For samples of fungicides 2-2 to 2-7, sodium myristate was then added to the solution in prescribed amounts, and the mixture was heated to 85-90 ° C. This gave milky, viscous white solutions. The resulting viscous solutions were each placed in a preheated plastic container in the bar rubber oven having an internal diameter of 21 mm and a depth of 50 mm, and left at room temperature. The solid fungicides in bar form (available chlorine contents listed in Table 1) were thus obtained.

Fungicide Simulation Test The fungicidal action of each of the fungicides obtained (fungicide sample 2-2 to 2-7) was evaluated, based on the degree of color fading. After the violet staining of a panel coated by immersion in an aqueous pigment solution (violet # 401, product of Daiwa Chemicals), each of the fungicides was finely applied to it as a strip and allowed to stand for 5 minutes. The violet color of the coated panel slowly faded after the application of the fungicides. Visual examination of the color fading from the coated panel gave the results listed in Table 2 below.

Fungicide test of the bathroom __ Fungicides (samples of fungicides 2-2 a 2-4) whose effectiveness (satisfactory color fading) has been evaluated in the simulation of the fungicide test described above, were finely applied to the tile-rich junctions of the tiles in a bathroom, and were allowed to remain 5 minutes. After application of the fungicide, the color of the fungus gradually faded, becoming virtually colorless after 5 minutes. After atomizing the warm water from a shower at the sites where the fungicide was applied, complete washing and removal was possible without the residue of the fungicide. The results obtained are listed in Table 2.

Table 2 : eg empl o comparison As the above results clearly show, it is preferred for the fungicides to have their compositions adjusted so that the available chlorine contents are within the ranges of the fungicides of the invention, ie, it is preferred for the sodium hypochlorite and (or) potassium hypochlorite, be added, so that the available chlorine content is at least 0.3%, and even more preferred for sodium hypochlorite and (or) potassium hypochlorite, be added in a such that the available chlorine content is at least 0.5%. Within the available chlorine content of under 0.3% of the bleached fungus, it will be insufficient, while fungicides with available chlorine contents of at least 0.5% can offer bleaching and elimination of the fungus within a waiting time of approximately 5 minutes .

Example 3 The procedure described in Example 2 was forwarded. However, for this example 3 solid fungicides were prepared in the form of sticks, by the combination of reactive grade sodium hypochlorite (available chlorine = 5%), reactive grade sodium hydroxide, reactive grade sodium myristate, polyethylene glycol Reactive grade (average molecular weight: 1000) and water- in the amounts (grams) listed in Table 3 below, in accordance with the procedure described in detail below. As shown in Table 3 below, the resulting fungicide samples 3-1 to 3-3, differ in their availability of chlorine contents (%) Table 3 * example comparative First, the sodium hydroxide solution was added in its prescribed amounts to the prescribed amount of water, and each was mixed after placement in a glass container. Then, the prescribed amount of sodium myristate was added to the mixture, which was then heated to 85-90 ° C. After the addition then of the prescribed amount of sodium hypochlorite, the solution was heated to 85-90 ° C. All components dissolved, giving a milky, viscous white solution. For the preparation of sample 3-1 of the fungicide, the subsequent preparation steps were omitted, since the completely uniform dissolution of the components could not be reached at this stage. The resulting viscous solutions were each packaged in a preheated plastic container in the barium rubber having an internal diameter of 21 mm and a depth of 560 mm, and allowed to cool to room temperature. The solid fungicides were obtained in the form of sticks (chlorine contents available in Table 3).

Fungicide Simulation Test The fungicide action of each of the fungicides obtained (fungicide sample 3-2 to 3-3) was evaluated by the procedure described in Example 2. The results obtained are shown in Table 4 .

Fungicide test of the bathroom The fungicidal action of fungicide samples 3-2 to 3-3 was evaluated by the procedure described in Example 2. The results obtained are listed in Table 4.

Table 4 For example, as shown clearly in the results, it is preferred for fungicides to be prepared by the addition of sodium hypochlorite and (or) potassium hypochlorite, in such a way that the commercially available chlorine content is less than 4.5%. .

Example 4 The procedure described in Example 2 was repeated. However, eleven solid fungicides in the form of bars were prepared for the mixing of reactive grade sodium hypochlorite. (available chlorine = 5%), reactive grade sodium hydroxide, reactive grade sodium myristate, synthetic smectite (trade name: SWN, product of Cope Chemical Co.), reactive grade and water in the amounts (grams) listed in Table 5 below, in accordance with the procedure described in detail below. As shown in Table 5 below, the resultant fungicide samples 4-1 to 4-11, differ in their contents of sodium myristate (%).

Table 5 'comparative example First, the aqueous solution of sodium hypochlorite, synthetic smectite and sodium hydroxide were added in their prescribed amounts to the prescribed amount of water, and each was mixed after placement in a glass container. Then, the prescribed amount of sodium myristate was added to each solution, which was then heated to 85-90 ° C. All components dissolved, giving a milky, viscous white solution.

Each of the resultant viscous solutions were packaged in a preheated plastic container in the bar rubber oven having an internal diameter of 21 mm and a depth of 50 mm, and allowed to cool to room temperature. As shown in Table 6, the solid fungicides in the form of sticks (contents of sodium myristate listed in Table 5) were obtained with fungicide samples 4-1 to 4-8, and an approximately solid fungicide was obtained with a sample of fungicide 4-9. The samples of fungicides 4-10 and 4-11 lowered the softness considerably, so that the solid state of the fungicides can not be maintained.

Fungicide Simulation Test _ ___ _ The fungicidal action of the fungicides obtained (sample of fungicides 4-1 to 4-9) was evaluated, according to the procedure described in Example 2. In this example, instead of the degree of color fading, the time (minutes) required for complete fading was measured. The results obtained are shown in table 6.

Table 6 * comparative example As the results clearly show, it is preferred for the fungicides, which are prepared by the addition of sodium stearate and sodium myristate of the alkali metal salts of fatty acids, so that the content of the alkali metal salt is in the range of 0.3-20%, and more preferably such that the content of the alkali metal salt of fatty acid is in the range of 0.5-10%. When the fungicides contain these gelling agents at least 0.3%, the solid state can not be adequately maintained, and it is difficult to supply the fungicide lodged in the container during use.

Effect of the Invention As explained above, by using a fungicide in accordance with the invention, its effective component acts directly on the fungus and removes it, while also providing a freshly cleaned surface by bleaching the action surface, allowing Reliable cleaning and fungicide operations through easy and safe use without waste.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the foregoing, the property contained in the following is claimed as property:

Claims (5)

1. A solid fungicide characterized in that it contains an oxidation-type bleaching agent as an effective component and that it comprises a gelling agent for the solidification of said bleaching agent.

2. A solid fungicide according to claim 1, characterized in that it is composed of a base, a t-ipo oxidation bleaching agent, a gelling agent, a surfactant, a humectant, a thickener and water.

3. A solid fungicide according to claim 1 or 2, characterized in that said bleaching agent is at least one compound selected from the group consisting of alkali metal salts and alkali metal salts of hypohalogenic acids, halogenated acids and acids halogenic

4. A solid fungicide according to any one of claims 1 to 3, characterized in that said gelling agent is at least one compound selected from the group consisting of alkali metal salts or ammonium salts of aliphatic carboxylic acids of 8 -16 carbon atoms, and 1,2-hydroxystearic acid.

5. A solid fungicide according to any of claims 1 to 4, characterized in that it is in the form of a rod and is housed in a container in a manner which allows its gradual supply during use. Z