JP2000038599A - Mildew removal agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mildew removal agent compsn. which can be applied to a vertical wall surface without exhibiting sagging and, when used, emits a chlorine odor very little by compounding an aq. soln. contg. a hypochlorite and a chlorate as the effective ingredients with sodium montmorillonite. SOLUTION: An aq. soln. contg. a hypochlorite (e.g. sodium or calcium hypochlorite) and a chlorate (e.g. sodium or calcium chlorate), pref. in a wt. ratio of (1/1)-(1/5), as the effective ingredients is compounded with 5-30 pts.wt. sodium montmorillonite based on 100 pts.wt. water in the aq. soln. Since the compsn. contg. sodium montmorillonite is gelatinous, it can be applied to a vertical wall surface without exhibiting sagging, and by the synergistic action of a hypochlorite and a chlorate, the compsn. slowly releases active Cl and active O, thus killing formed mildew in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fungicide composition for use in bathrooms, kitchens and the like, which contains a compound capable of releasing active chlorine as an active ingredient.

[0002]

2. Description of the Related Art Generally, a mold removing process is performed as follows.
Sodium hypochlorite, chloroisocyanuric acid compound,
An aqueous solution containing a halogenated hydantoin compound or the like as an active ingredient is used and sprayed on a wall or the like where mold is generated. However, it is not always satisfactory from the viewpoint of safety.

Conventionally, in order to safely handle compounds capable of releasing active chlorine or active oxygen, there has been known a method of gelling and applying an aqueous solution containing these compounds, as disclosed in JP-A-47-8157. In the gazette, a method using a mixture of an aqueous solution of an alkali metal hypochlorite and the like, a synthetic magnesium silicate in which a part of magnesium atoms are replaced by lithium atoms as a gel forming agent,
JP-A-60-180902 discloses a method in which sodium montmorillonite is mixed with an aqueous solution containing sodium chlorite and gelled to stabilize.

[0004] However, when an aqueous solution containing an alkali metal hypochlorite or an aqueous solution containing sodium chlorite is treated with a gel-forming agent, the amount of active chlorine or active oxygen generated is remarkably reduced. Even if it is applied to a wall surface or the like where cracks are generated, mold cannot be sufficiently killed and it is difficult to practically use as a mold removing agent.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to gel an aqueous solution of a compound capable of generating active chlorine and apply it to a vertical wall without dripping when used as a mold remover. To provide a mold remover composition which has extremely low chlorine odor generation during use, has a strong killing effect on generated mold, and has good stability of active chlorine during storage. Is to do.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted a number of tests and studies in view of such circumstances, and as a result, have found that an aqueous solution containing hypochlorites and chlorates as active ingredients has sodium. It was recognized that the intended purpose could be achieved by adding montmorillonite, and the present invention was completed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The mold remover composition of the present invention comprises a combination of hypochlorites such as sodium hypochlorite and calcium hypochlorite and chlorates such as sodium chlorite and calcium chlorate. It is essential that the weight ratio is slightly different depending on the type of compound,
Usually a ratio of 1: 1 to 5 should be used.

In the practice of the present invention, if the amount of hypochlorite falls below a predetermined range, the amount of active chlorine generated is reduced and the killing action against mold does not appear quickly. The effect does not change even if it is used beyond. When the chlorates are below the predetermined range, the killing power against mold tends to be remarkably reduced. Conversely, when the amount of the chlorates is too large, the stability of the composition during storage decreases. Then long-term storage becomes impossible. In order to increase the mixing stability of the aqueous solution containing hypochlorites and chlorates, a neutral alkali metal salt such as sodium chloride or sodium sulfate should be added to these systems.

The sodium montmorillonite used in the present invention has a structure and composition similar to natural heclite, and is derived from a clay mineral mainly composed of silica, alumina and a small amount of magnesia in the montmorillonite group minerals,
The typical form is an average particle size of 20 to 30 nm,
An agglomerate of primary microparticles having an average thickness of 1 nm and having a typical chemical composition (based on dry weight):
SiO2 = 60%, MgO = 26%, Li2O = 1%,
Na2O = 3%, H2O = 7%.

The amount of sodium montmorillonite added to an aqueous solution containing hypochlorites and chlorates is water 10
The range of 5 to 30 parts by weight relative to 0 parts by weight is preferable. When the amount of sodium montmorillonite is small relative to water, the composition lacks viscosity and is difficult to coat on a vertical wall surface. The viscosity is extremely increased and the generation of active chlorine is suppressed, so that the desired medicinal effect cannot be produced.

According to the present invention, sodium montmorillonite is blended with an aqueous solution containing hypochlorites and chlorates as active ingredients, and the composition is gelled. Can be applied without
By the synergistic action of hypochlorites and chlorates, molds generated by gradually releasing active chlorine and active oxygen can be killed in a short time, and these are covered with the paste film. Since it exists in a state and volatilization into the air is suppressed, the duration of the medicinal effect can be drastically extended, and the generation of chlorine odor during use can be significantly reduced.

In the practice of the present invention, an extender, a colorant, a deodorant and the like which are stable against active chlorine may be used in combination.

[0013]

The present invention will be specifically described below with reference to examples and comparative examples. In these tests, the dripping when applied to a vertical wall surface was obtained by allowing the mold remover to stand for 5 hours, measuring the thixo index, and counting the results. The thixo index was 4 or more. If so, no dripping is observed on the coating.

The generation of chlorine odor and other off-flavors during use is measured by smell. The killing effect on mold is obtained by contacting a mold remover with mold and visually observing the time required for mold removal. The storage stability of the mold remover is obtained by leaving the sample at room temperature and examining the time-dependent change of active chlorine (reduction rate with respect to the initial concentration). In these tests, sodium montmorillonite (trade name: Laponite RDS) commercially available from Nippon Silica Industry Co., Ltd. was used.

Example 1 60 parts by weight of a 12% aqueous sodium hypochlorite solution, 60 parts by weight of sodium chlorate and 800 parts by weight of water were mixed uniformly, and 80 parts by weight of sodium montmorillonite was added thereto. To prepare a mold remover. The test results of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown, all the characteristics were excellent.

Example 2 60 parts by weight of a 12% aqueous sodium hypochlorite solution, 60 parts by weight of sodium chlorate, 20 parts by weight of sodium chloride and 780 parts by weight of water were uniformly mixed, and sodium montmorillonite 80 was added thereto. The parts by weight were added and mixed uniformly to prepare a mold remover. The results of tests of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect on mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown in the above, all the properties were good, and particularly, the storage stability was superior to that of Example 1.

Comparative Example 1 120 parts by weight of a 12% aqueous solution of sodium hypochlorite and 800 parts by weight of water were uniformly mixed.
To this, 80 parts by weight of sodium montmorillonite was added and uniformly mixed to prepare a mold remover. The test results of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown, although the killing effect on mold was remarkable, it was recognized that it was difficult to put into practical use due to poor storage stability.

Comparative Example 2 A fungicide was prepared by uniformly mixing 120 parts by weight of sodium chlorate and 800 parts by weight of water, and adding 80 parts by weight of sodium montmorillonite to the mixture. The test results of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown, almost no killing effect on mold was recognized, and it was recognized that there was no practicality.

[Comparative Example 3] 130 parts by weight of sodium chlorite and 800 parts by weight of water were uniformly mixed, and 70 parts by weight of sodium montmorillonite was added thereto and uniformly mixed.
A mold remover was prepared. Thixo index of the mold remover,
The test results of the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are as shown in Table 1. Has almost no medicinal effect on
It was recognized that there was no practicality.

Comparative Example 4 190 parts by weight of sodium dichloroisocyanurate and 730 parts by weight of water were uniformly mixed.
To this, 80 parts by weight of sodium montmorillonite was added and uniformly mixed to prepare a mold remover. The test results of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown, although the medicinal effect against mold was remarkable, it was recognized that it was difficult to practically use because of a strong chlorine odor when applied to a wall surface and poor storage stability.

Comparative Example 5 50 parts by weight of dichlorodimethylhydantoin and 870 parts by weight of water were uniformly mixed, and 80 parts by weight of sodium montmorillonite were added and uniformly mixed to prepare a fungicide. The test results of the thixotropic index of the mold remover, the degree of chlorine odor when applied to the bathroom wall, the killing effect against mold generated on the bathroom wall, and the storage stability stored in a glass bottle at room temperature are shown in Table 1. As shown, although the medicinal effect against mold was remarkable, it was recognized that it was difficult to practically use because of its low viscosity and dripping when applied to a wall surface.

[0022]

[Table 1]

[0023]

The fungicide of the present invention can be applied to a vertical wall without dripping, has very little chlorine odor during use, and has a strong killing action against mold. It has a great effect on implementation, such as having good storage stability.

Claims (1)

[Claims] 1. A fungicide composition comprising sodium montmorillonite and an aqueous solution containing hypochlorites and chlorates as active ingredients.