WO2001018167A1

WO2001018167A1 - Bleacher composition

Info

Publication number: WO2001018167A1
Application number: PCT/JP2000/005903
Authority: WO
Inventors: Akifumi Kimura; Hiroshi Murakami; Kozo Kitazawa
Original assignee: Settsu Oil Mill., Ltd.
Priority date: 1999-09-03
Filing date: 2000-08-31
Publication date: 2001-03-15
Also published as: AU6866400A

Abstract

A bleacher composition comprising a hypochlorite, an inorganic alkali, and an organic thickener and further containing (1) at least one member selected from the group consisting of polar organic solvents, organic chelating agents, and quaternary ammonium salts having one or two C8-18 alkyl groups in the molecule and/or (2) organic or inorganic particles having an average particle diameter of 1 νm to 3 mm; and a method of fungus removal which comprises applying the bleacher composition to a hard material. The bleacher composition is highly effective in removing fungi growing on a hard material and has satisfactory bleaching activity. It can prevent fungal growth over long, so that the frequency of bleaching can be reduced. When the composition contains the organic or inorganic particles, the parts coated with the bleacher composition are obvious. Thus, the parts which should be bleached can be easily prevented from being incompletely coated, and the composition can be applied easier and more perfectly.

Description

Description Bleach composition Technical field

The present invention relates to a bleaching composition applied to hard materials such as floors, walls, ceilings, joints and sealing materials of bathrooms such as dwellings, kitchens, and toilets. The present invention relates to a bleaching composition excellent in mold generation prevention and mold removal workability. Background art

Mold generated on hard materials such as floors, walls, ceilings, joints and sealing materials of bathrooms, kitchens, toilets, etc. of dwellings, etc. is hard when organic substances adhered to the hard materials or when the hard materials themselves contain organic substances. It grows in the presence of air and moderate moisture, using the material itself as a nutrient source. Organic substances adhering to the hard material include, for example, detergents such as stone used in bathrooms and the like, and organic substances such as sebum washed off, hand scales, and organic dust derived from the human body, animals, clothes and the like floating in the air. Is mentioned. When molds such as blue mold and black mold are formed on these organic materials, the discolored parts are caused by spores and the like, which impairs the appearance and aesthetic appearance, or the hygiene environment of living space.

Conventionally, bleaching and mold removal have been conventionally performed using a bleaching composition such as sodium hypochlorite and hydrogen peroxide for such discoloration due to mold. In particular, to remove mold generated on a vertical surface such as a wall, a thickening component is added to the bleaching composition to prevent the bleaching composition from flowing out and to prolong the contact time between the mold and the bleaching composition. A bleaching composition that enhances the bleaching effect has been proposed (JP-A-1-248896). Disclosure of the invention

However, even if the mold is bleached and removed once with sodium hypochlorite, etc., the removal is incomplete, or the above-mentioned detergent such as stone or organic matter such as sebum remains on the hard material. When organic matter such as stone and dust newly adheres to the surface of the hard material, mold is generated again. For this reason, there is a problem that the mold removing operation must be repeatedly performed in a short period of time, so that the mold removing effect is excellent and the frequency of the mold removing operation within a certain period can be significantly reduced. The emergence of a bleaching composition having an excellent effect of preventing re-generation has been desired.

That is, the gist of the present invention is:

[1] A bleaching agent composition comprising hypochlorite, an inorganic alkali and an organic thickener, comprising: 1) a polar organic solvent, an organic chelating agent, and 8 to 1 carbon atoms in the molecule. At least one selected from the group consisting of quaternary ammonium salts having 1 to 2 alkyl groups and / or 2) bleaching further comprising organic or inorganic particles having an average particle size of 1 zm to 3 mm. Agent composition,

[2] A bleaching composition comprising a hypochlorite, an inorganic alkali and an organic thickener, comprising: 1) a polar organic solvent, an organic chelating agent, and 8 to 18 carbon atoms in the molecule. At least one selected from the group consisting of quaternary ammonium salts having 1 to 2 alkyl groups and Z or 2) the average particle size is 1π! A bleaching composition further comprising organic or inorganic particles of up to 3 mm, and

[3] A method for removing a mold by applying the bleaching composition according to [1] or [2] to a hard material. BEST MODE FOR CARRYING OUT THE INVENTION

Examples of hypochlorite include Na, K, Li, Ca, Mg salts of hypochlorous acid. One type of hypochlorite may be used, or two or more types may be used in combination. Hypochlorite bleaches mold stains due to its strong oxidizing action and Sterilize and remove. The content of hypochlorite is preferably from 0.01 to 20% by weight of the bleaching composition, more preferably from 0.1 to 10% by weight.

Examples of the inorganic alkali include an alkali metal hydroxide, oxide, gayate, carbonate, phosphate, borate and the like. Specific examples include sodium hydroxide, potassium hydroxide, sodium silicate, sodium carbonate, and the like. One type of inorganic alkali may be used, or two or more types may be used in combination. Inorganic alkalis prevent the decomposition of hypochlorite and prevent the bleaching effect from deteriorating. The content of the inorganic alkali is preferably from 0.01 to 15% by weight, more preferably from 0.1 to 10% by weight of the bleaching composition.

Examples of the organic thickener include a water-soluble organic polymer having a hydroxyl group, a carboxyl group, a sulfonic acid group, an ether group, an amino group, and the like in a molecule. Specifically, (1) guar gum, alginic acid, xanthan gum, natural macromolecules derived from plants, animals and animals such as casein, and derivatives thereof, and (2) oxidation, sulfuration, methylation, carboxymethyl , Hydroxyethylated, hydroxypropylated, cationized starch derivatives and cellulose derivatives, (3) polyacrylic acid derivatives which are copolymers of acrylic acid with monomers copolymerizable with acrylic acid, polyacrylic acid homopolymers (4) Polyvinyl alcohol and its derivatives, (5) Polyalkylene glycol such as polyethylene glycol and polypropylene glycol and its derivatives, (6) Polyacrylic acid homopolymers and cross-linked polyacrylic acid derivatives. ) Cationic polymer, etc. are examples Wear. Organic thickeners enhance the adhesion of the bleach composition to mold stains and, consequently, the mold removal effect. One type of organic thickener may be used, or two or more types may be used in combination. Among the above organic thickeners, those described in the groups (2) to (5) are preferable from the viewpoint of the sustainability of the thickening effect, and those described in the groups (2) and (3) are preferable. More preferred. The content of the organic thickener is preferably from 0.01 to 10% by weight, more preferably from 0.01 to 5% by weight of the composition of the present invention. Polar organic solvents have the effect of promoting the penetration of hypochlorite into molds and organic substances on hard materials. Active removal of organic matter has the effect of preventing mold from regenerating. As the polar organic solvent, those having at least one hydroxyl group and / or ether bond in the molecule are preferable.

As the polar organic solvent, a compound represented by the formula (I) and an alkyl glyceryl ether having an alkyl group having 2 to 10 carbon atoms are preferable.

Formula (I): R ¹ [(X) (AO) „R ² ) _m

(Wherein, R ¹ is a hydrogen atom or a hydrocarbon group having 1-8 carbon atoms, more preferably a hydrogen atom or a hydrocarbon group having 1-6 carbon atoms, X is 10-, n is 1-20, m is 1 to 8, more preferably 1 to 3, more preferably 1 or 2, A is an alkylene group having 2 or 3 carbon atoms, R ² is a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, A hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms is preferable, and a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms is more preferable.)

Specific examples of the hydrocarbon group for R ¹ and R ² include a methyl group, an ethyl group, a propyl group, a butyl group, an octyl group, and a 2-ethylhexyl group.

Specific examples of the compound represented by the formula (I) include: 1) ethylene glycol, ethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, and ethylene glycol monopropyl glycol. Glycol ethers such as ethers; 2) methyl ether, ethyl ether, butyl ether, hexyl ether, phenyl ether, benzyl ether, dimethyl ether, dimethyl ether, butyl methyl ether, butyl ethyl ether, etc. of such glycol ethers; Alkyl ethers.

Specific examples of the alkyl glyceryl ether include ethyl glyceryl ether, butyl glyceryl ether, hexyl glyceryl ether, and 2-ethyl. Xyl glyceryl ether and the like.

One kind of the above-mentioned polar organic solvent may be used, or two or more kinds thereof may be used in combination. The compounding amount of the polar organic solvent is preferably from 0.01 to 50% by weight, more preferably from 0.05 to 20% by weight. As the polar organic solvent, a compound having a solubility of 25 to 100 g in water of 10 g or more is preferable. Further, a compound having a flash point of 40 ° C. or higher is preferable because it is hard to volatilize during use and manifests the above-mentioned effects without loss. The flash point is more preferably 70 ° C. or higher.

Organic chelating agents include ethylenediaminetetraacetic acid, hydroxyiminodiacetic acid, dihydroxyethylglycine, tritriacetic acid, hydroxyethylenediamintriacetic acid, dimethylenetriaminepentaacetic acid, and triethylenetetramine hexaacetic acid. And metal salts thereof, tetraacetylethylenediamine, aminotrimethylenephosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepentamethylenephosphonic acid Acids, N-oxides of amino trimethylene phosphonic acid, and metal salts thereof. Organic chelating agents show the effect of removing organic substances on hard materials, for example, the decomposition of scum of stones such as calcium stones and the like, which often occur in bathrooms, and the effect of removing organic substances. In addition, the effect of enhancing the bleaching effect of hypochlorite, a rapid and good mold removing effect, and an excellent mold preventing re-generation effect are exhibited.

One type of organic chelating agent may be used, or two or more types may be used in combination. The content of the organic chelating agent in the bleach composition is preferably from 0.001 to 10% by weight, more preferably from 0.05 to 5% by weight. Further, from the viewpoints of the stability and the effect of removing the mold in the bleaching agent composition and the effect of preventing the re-generation of mold, an organic chelating agent is preferable to an inorganic one.

Quaternary ammonium salts having 1 to 2 alkyl groups having 8 to 18 carbon atoms in the molecule include lauryltrimethylammonium chloride and cetyltrimethylammonium. Num phosphate, stearyltrimethylammonium chloride, lauryldimethylbenzylammonium chloride, didecyldimethylammonium chloride, dicoyldimethylammonium chloride, dioleylmethylammonium chloride, etc. Can be When the above quaternary ammonium salt is blended, the salt is adsorbed on the surface of the hard material after the mold removal operation to make the surface of the hard material hydrophobic, and suppresses the adhesion of water droplets or water, thereby suppressing moisture and forming a dry atmosphere. Therefore, the effect of preventing the re-generation of mold is exhibited. In addition, the quaternary ammonium salt itself has an effect of inhibiting the generation of mold and has an effect of preventing mold. This effect cannot be obtained if there is no alkyl group having 8 to 18 carbon atoms in the molecule, and if the number of alkyl groups having 8 to 18 carbon atoms is 3 or more in the molecule, the bleaching agent The solubility is not obtained in the composition and the effect is hardly obtained. The carbon number of the alkyl group is more preferably from 10 to 14.

One of the above quaternary ammonium salts may be used alone, or two or more thereof may be used in combination. The content of the quaternary ammonium salt in the bleaching composition is preferably from 0.01 to 10% by weight, more preferably from 0.05 to 5% by weight.

The following describes organic or inorganic particles having an average particle size of 1 m to 3 mm.

Examples of the organic particles include natural organic particles and synthetic organic particles. Examples of natural organic particles include pulverized materials such as textiles such as cotton and pulp, starch, vegetable shells such as walnut and almond, and shellfish shells such as crab. Synthetic organic particles include polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), vinyl chloride resin (PVC), urea resin (UF), methacrylic resin (MMA), ABS resin (ABS ), Polycarbonate (PC), polymethylpentene (PMP), methacrylstyrene copolymer resin (MS), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyacrylonitrile (PAN), etc. Particles. In the case of synthetic organic particles, from the viewpoint of stability against hypochlorite, PE, PP, PTFE, PVC, ABS, etc., in which the main chain of the polymer is composed of carbon to carbon, are preferred. Dyes, organic pigments, and inorganic pigments can be directly blended into the bleach composition of the present invention for coloring.However, in view of the stability of the pigment in the bleach composition and the coloring of hard materials, coloring is performed. It is preferable to use organic particles. One or more dyes, organic pigments, and inorganic pigments can be used to color the organic particles.However, from the viewpoint of color stability in the bleach composition, organic pigments or inorganic pigments are preferable, and organic pigments are more preferable. preferable. Examples of the inorganic particles include natural minerals and metals such as titanium, and particles of metal oxides such as titanium oxide, iron oxide, aluminum oxide, and calcium oxide.

Organic particles are preferred over inorganic particles in terms of the effect on the stability of the bleach composition. Among the inorganic particles, titanium oxide is preferable. The shape of the organic or inorganic particles is not particularly limited, but is preferably spherical. The average particle size of the organic or inorganic particles is preferably from 1 to 3 mm, more preferably from 1 to 1 mm, and still more preferably from 10 / m to 0.1 mm. The average particle size of organic or inorganic particles is calculated on a volume basis. For example, it is measured using a laser-diffraction type particle size distribution analyzer: LA-700 (manufactured by HORIBA, Ltd.) Value.

One type of organic or inorganic particles may be used, or two or more types may be used in combination. The content of the organic or inorganic particles in the bleaching composition is preferably from 0.01 to 30% by weight, more preferably from 0.1 to 15% by weight.

The bleach composition may include water. From the viewpoints of product stability and removability, the water to be used is preferably purified water from which metal ion ions in water have been removed to 1 mg ZL or less with ion exchange resin or the like. Various surfactants and antifoaming agents such as silicone oil can be added to the bleaching composition of the present invention, if necessary. The content of water in the bleach composition is preferably 40 to 99.9% by weight, more preferably 60 to 99.5% by weight.

The bleaching composition of the present invention comprises a bleaching composition containing hypochlorite, an inorganic alkali and an organic thickener, and (1) a polar organic solvent, an organic chelating agent and a molecule. A quaternary ammonium salt having 1 to 2 alkyl groups having 8 to 18 carbon atoms An embodiment containing one or more members selected from the group consisting of: (2) an embodiment containing organic or inorganic particles having an average particle diameter of 1 m to 3 mm; and (3) a polar organic solvent; At least one selected from the group consisting of a chelating agent and a quaternary ammonium salt having 1 to 2 alkyl groups having 8 to 8 carbon atoms in the molecule, and organic or inorganic particles having an average particle size of 1 zm to 3 mm There is an embodiment containing both.

In the above-mentioned embodiment (1), when two or more of the three components are contained, the respective effects described above appear synergistically, which is more preferable. At this time, it is preferable that one of the two or more components is the quaternary ammonium salt, since an excellent mold-preventing effect can be obtained. It is preferable to use an organic chelating agent and the above quaternary ammonium salt because a more excellent fungicide-preventing effect can be obtained. In particular, when all of these three types are contained, an excellent mold-removing effect and a fungicide-preventing effect are simultaneously obtained, which is particularly preferable.

In the above embodiment (2), the average particle size is 1ζπ! It is preferable to include organic or inorganic particles having a particle size of up to 3 mm, because the scrubbing effect of the particles makes it possible to extremely remove mold and masticate. In particular, in the embodiment of (2), the use of organic particles is preferable from the viewpoint of easily obtaining the target particle size and securing the stability of the bleach composition. When opaque or colored particles are used as the organic or inorganic particles, the area where the bleaching agent composition is applied becomes clearer, facilitating the removal of the mold, and the removal of the mold is eliminated. It is preferable because the antifungal property is improved.

In the embodiment of the above (3), an excellent mold removing effect and a fungicide preventing effect, and good mold removing workability can be simultaneously obtained, which is particularly preferable. In this embodiment, it is more preferable that at least two of the polar organic solvent, the organic chelating agent and the quaternary ammonium salt are contained, and it is particularly preferable that all of the three are contained.

The viscosity of the bleaching composition of the present invention can be improved by preventing the bleaching composition from scattering at the time of use to enhance the safety, and by preventing the bleaching composition from flowing out from the mold surface to be removed. From the viewpoint of improving the properties and antifungal properties, the viscosity at 25 ° C is preferably from 3000 to 200,000 cP, more preferably from 10,000 to 100,000 cP, and particularly preferably from 10,000 to 70,000 cP. preferable . The viscosity can be measured by, for example, a BL-type viscometer.

The bleach composition of the present invention can be easily prepared by mixing each component by a known mixing method. That is, the bleaching composition of the present invention is a bleaching composition comprising a hypochlorite, an inorganic alkali and an organic thickener, and 1) a polar organic solvent, an organic chelating agent. And one or more selected from the group consisting of quaternary ammonium salts having 1 to 2 alkyl groups having 8 to 18 carbon atoms in the molecule and Z or 2) an organic or inorganic organic material having an average particle size of 1 m to 3 mm. The particles are further blended. Here, the compounding amount of each component is set according to the content of each component in the bleaching composition, and the bleaching composition of the present invention is used for equipment of general households or companies such as hotels and restaurants. It can be preferably used for bleaching, removal of mold generated in the facility and prevention of mold generation. Specific examples of the part where mold is generated include hard materials such as bathrooms, kitchens, refrigerators, toilets, and other floors, walls, glass, doors, ceilings, joints, and sealing materials. The bleach composition of the present invention can be used for bleaching and removing mold generated on inorganic materials such as cement, plaster, tile, metal, etc. or on organic materials such as plastic, rubber, fiber, wood, etc. Can be used preferably for preventing generation of mold and mold

The bleach composition of the present invention may be sprayed with a trigger-ejected injector, applied to a cloth such as a rag, and applied, dipped in a liquid to perform bleaching treatment, or a bleach composition having a high viscosity may be applied to a tube or the like. It can be applied in such a way that it is put in a container, and it is applied little by little from the nozzle and applied onto the mold. In particular, joints for tiles-removal of grooves and narrow gaps typified by seals in glass doors, refrigerators, etc. In view of the ability to properly treat only the mold and removing or preventing mold, 6,000 to 200,000 cP is preferred. That is, it is preferably at least 6,000 cP, more preferably at least 8,000 cP, even more preferably at least 10,000 cP, and further preferably at most 200,000 cP, preferably at most 100 cP. A method in which a gel-type bleaching composition having a viscosity of 10,000 cP or less is put into a container such as a tube, and is applied little by little from the nozzle and applied to the mold is preferred. In other words, by using a material having a viscosity of 6,000 cP or more, when applied to the surface of a hard material such as a wall surface, the bleaching agent can be prevented from dripping and falling, and the mold can be removed efficiently. The tip of the nozzle may be flat.However, when applying a bleaching composition while the nozzle is in contact with the hard material surface, it is easy to apply a uniform force to the surface of the nozzle with a slight force. In order to improve the workability by forming the nozzle, the tip of the nozzle is more uneven than the flat tip, the contact area between the nozzle and the coating surface is reduced, and the coating can be easily performed with a small force. In addition, setting the height of the unevenness to a desired height is preferable because a desired coating thickness can be obtained, the mold removal workability is improved, and good mold removal can be obtained. The mounting direction of the unevenness is preferably parallel to the direction in which the bleach composition is discharged. The height of the irregularities at the tip of the nozzle is preferably about 0.1 to 10.0 mm, and the number of irregularities on the nozzle surface is preferably 1 or more, more preferably 3 or more. The nozzle may be used by setting it in a container when necessary. In addition, when colored organic or inorganic particles are added to the bleaching composition, it is possible to visually determine whether or not the coating has been applied even if the coating portion is a groove or a narrow gap. It is preferable because it can improve and prevent coating leakage and can obtain good mold removal. Example

Next, the present invention will be described in more detail based on examples, but the present invention is not limited to only these examples.

1. Preparation of test plate

Test plate 1: A silicon resin plate 5 cm long, 5 cm wide, and 1 mm thick was prepared. The whiteness of this resin plate was measured and defined as the initial whiteness. Add calcium stone to this resin plate. It was applied at a rate of 0.5 g / cm ² . The weight of the resin plate to which calcium stone was adhered was measured and used as the initial weight. The mold collected from the bathroom was adhered while coated with absorbent cotton, placed in a constant temperature bath at 30 ° C, and left for 2 weeks to produce mold, which was used as test plate 1.

Test plate 2: A plate was prepared by fixing 20 2 cm square tiles with a cement joint of 0.5 cm width. This plate and test plate 1 were placed in a constant temperature bath at 30 ° C. and left for 2 weeks to generate mold on the plate. This was designated as test plate 2.

2. Preparation of bleach composition

Each component was mixed to prepare a bleach composition. Table 1 shows the compositions (% by weight) of the bleach compositions of the product of the present invention (Examples 1 to 11) and the comparative product (Comparative Examples 1 and 2).

Example of implementation Comparative example

1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 Sodium hypochlorite 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.0 7.0 7.0 0.5 2.0 7.0 Caustic soda 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.5 2.0 2.0 0.2 1.0 2.0 Poly Carboxylic acid 0.5 0.5 0.5 1.3 0.5 1.5 Cationic cellulose 2.0 2.0 5.0 7.0 3.0 3.0 1.0

Polyoxyethylene dibehenyl ether 0.5 5.0

E DT A 1.0 0.1 1.0 2.0 0.5 0.5 1.0

Trihydrosilidene-1,1-diphosphonic acid 0.3 3.0 3.0 1.0 0.5 0.5

Didecyldimethylamine dichloride 1.0 1.0 ι. 0.2 0.2

Lauryl dimethyl benzyl ammonium chloride 1.0 1.0 1.0 1.0 1.0 1.0 1.0

Diethylene glycol monobutyl ether 3.0 10 7.0 5.0

Butyldariceryl 1-Tel 3.0 5.0 7.0 7.0 3.0

Walnut shell crushed child 5.0

Blue colored poly i-tylene particles 1.0 2.0 0.5 0.5

Titanium oxide particles 7.0

Deionized water remaining

Here, the classification of the components in the table is as follows.

Sodium hypochlorite (hypochlorite), caustic soda (inorganic alkali), polycarbonic acid (organic thickener. However, it is a polycarboxylic acid obtained by partially crosslinking polyacrylic acid with a molecular weight of about 100,000. ), Cationic cellulose (organic thickener; hydroxyshethylcellulose hydroxyalkyltrimethylammonium chloride ether), polyoxyethylene dibehyl ether (organic thickener, but ethylene oxide) The average number of moles added is 350.), EDTA, 1-hydroxyethylidene-1,1-diphosphonic acid (both organic chelating agents), didecyldimethylammonium chloride, lauryldimethylbenzylammonium chloride ( All are quaternary ammonium salts), diethylene glycol monobutyl ether, petit Luglyceryl ether (both polar organic solvents with a flash point of 70 ° C or more), walnut husk ground particles *, blue colored polyethylene particles ** (all organic particles. *: 0.5 mm average particle size, * *: Average particle size 0.1 mm), titanium oxide particles (inorganic particles, average particle size 0.05 mm).

3. Mold removal test

About 2.5 g of the bleaching agent composition was applied on the test plate 1 to perform a mold removal treatment. For bleach compositions with a viscosity of less than 4,000 cP, apply by spraying with an injector with a trigger, and for bleach compositions with a viscosity of 4,000 cP or more, a tube with a nozzle with a diameter of 5 mm The test plate 1 was directly rubbed while the bleach composition was being discharged from the plastic nozzle of Example 1. Then, the test plate 1 was set upright and left for 10 minutes. Then, it was immersed in water and air-dried. The whiteness of the test plate 1 after the air drying treatment was measured, and the mold removal rate (%) was obtained from the following equation.

Mold removal rate (%) = (whiteness after air-drying ÷ initial whiteness) X 100

Further, the remaining amount of organic matter derived from calcium stone remaining on the test plate 1 after the air-drying treatment was measured by a gravimetric method, and an organic matter removal rate (%) was obtained. Organic matter removal rate (%) = [(initial weight-weight after air drying) X 100]

Here, the whiteness of the resin plate and the test plate 1 was determined using a handy single color difference meter “NR—3000” (manufactured by Nippon Denshoku Industries Co., Ltd.).

The immersion washing was performed as follows. A 15 cm x i 5 cm x 5 cm stainless steel bath was filled with ion-exchanged water (room temperature). The object to be cleaned was immersed therein for 10 seconds to perform cleaning.

4. Mold prevention test

After the mold removal treatment with the bleaching agent composition, the test plate 1 washed with water, air-dried, and the test plate 1 separately prepared were placed in a constant temperature bath at 30 ° C. and left for 2 weeks. After standing, the bleaching composition was used to visually remove the mold, then immersed in water, and air-dried.

Area ratio (%) = [(molded area) Z (area of test plate 1)] X100 From the obtained area ratio, the mold generation prevention rate was calculated by the following formula.

Mold prevention rate (%) = 100-Area rate (%)

Table 2 shows the viscosity of the bleach composition at 25 ° C and the results of each test.

Table 2

From the above table, the following results became clear.

Examples 1 to 3 were compared with Comparative Example 1 to examine the relationship between the components and the effects. The addition of a polar organic solvent improved mold removal and mold prevention (Example 2). This is considered to be due to the organic substance removing effect of the polar organic solvent. The addition of an organic chelating agent improved mold removal and mold prevention (Example 1). This is considered to be due to the organic substance removing effect of the organic chelating agent. In addition, the combined use of a quaternary ammonium salt having a specific structure improved mold removal and mold prevention (Example 3). This is thought to be due to the water repellent effect of the hard material surface.

Two types of polar organic solvents, organic chelating agents and quaternary ammonium salts of a specific structure When combined with the above, the effect of each component appeared as a synergistic effect (Examples 4 to 11). Particularly good results were obtained when the three components of a polar organic solvent, an organic chelating agent and a quaternary ammonium salt having a specific structure were blended (Examples 7, 9, 10, and 11). Further, the bleaching agent composition having a viscosity of 8,000 cP or more was less spilled even on a vertical surface, and was able to prevent mold generation for as long as two weeks (Examples 6 to 11).

5. Application and workability

From a plastic nozzle in a tube with a nozzle of 5 mm diameter, Example 6,

The bleach compositions of 8, 10 and Comparative Example 2 were applied to the joints of the test plate 2 by rubbing, and the applicability and workability at that time were evaluated. As a result, in Examples 6, 8, and 10 in which the organic particles were blended, the place where the coating was applied became clear, and there was no unpainted portion more easily than in Comparative Example 2, and the complete mold removal operation was completed. . In addition, the mold removal rate improved by 20 to 30% by visual judgment. This is thought to be due to the polishing effect of the organic particles. At the time of coating, a nozzle having 5 mm in diameter and 3 mm in width and 5 mm in width at the tip of the nozzle having a diameter of 5 mm was also used. The uneven portions were provided in the direction parallel to the direction in which the bleach composition was discharged. Since the contact area between the nozzle and the test plate was smaller than that of a nozzle without irregularities, the bleach composition could be easily and uniformly applied to a thickness of about 1 mm with a small force. Industrial applicability

The bleaching composition of the present invention has excellent mold removal properties and good bleaching action against molds generated on hard materials, and furthermore has a long-term antifungal property, thus reducing the frequency of work. be able to. Also, by blending the organic or inorganic particles, the application site of the bleach composition becomes clear, the uncoated area can be easily prevented, and the operation can be performed more easily and more completely.

Therefore, the bleach composition of the present invention can be used in households, hotels, restaurants, etc. It can be preferably used for bleaching equipment of a company, removing mold generated in the equipment and preventing generation of mold.

Claims

The scope of the claims

1. A bleaching composition containing hypochlorite, an inorganic alkali and an organic thickener, comprising: 1) a polar organic solvent, an organic chelating agent, and 8 to 18 carbon atoms in the molecule. One or more selected from the group consisting of quaternary ammonium salts having 1 to 2 alkyl groups and Z or 2) a bleaching agent further containing organic or inorganic particles having an average particle size of 1 m to 3 mm. Composition.

2. The bleaching composition according to claim 1, wherein the viscosity at 25 ° C is 3,000 to 200,000 cP.

3. The drift agent composition according to claim 1, wherein the organic or inorganic particles are colored particles.

4. A bleaching composition comprising hypochlorite, an inorganic alkali and an organic thickener, comprising: 1) a polar organic solvent, an organic chelating agent, and 8 to 18 carbon atoms in the molecule. One or more selected from the group consisting of quaternary ammonium salts having 1 to 2 alkyl groups and / or 2) a bleaching agent further comprising organic or inorganic particles having an average particle size of 1 / m to 3 mm. Composition.

5. The bleaching composition according to claim 4, wherein the viscosity at 25 ° C is 3,000 to 200,000 cP.

6. The bleach composition according to claim 4, wherein the organic or inorganic particles are colored particles.

7. A mold removing method, wherein the bleaching composition according to any one of claims 1 to 6 is applied to a hard material.

8. The mold removing method according to claim 7, wherein the method is applied on a groove, a narrow gap, or a thin seal.

9. The method according to claim 7, wherein a bleaching composition having a viscosity of 6,000 to 200,000 cP at 9.25 ° C. is used.