JP2002302405A - Powdery antimicrobial composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a powdery antimicrobial composition having good antimicrobial effect and cleansing effect and also high solubility to water. SOLUTION: This powdery antimicrobial composition comprises a cationic antimicrobial agent of formula 1 or 2 [R<1> and R<8> are each a 6-22C, R<2> , R<3> and R<7> are each a 1-22C, and R<4> to R<6> are each a 1-6C straight-chain, branched or cyclic hydrocarbon group, respectively, wherein R<1> to R<4> and R<6> to R<8> may respectively be bound to each other to form a ring, respectively; and Ph is phenyl].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a powdered antibacterial agent composition used in food factories and the like, and more particularly to a powdered antibacterial agent composition having excellent bactericidal and detergency properties.

[0002]

2. Description of the Related Art Conventional powdery antibacterial compositions are composed of a bactericide (quaternary ammonium salt, amphoteric surfactant, biguanide bactericide, etc.) and a detergent (nonionic surfactant, amphoteric surfactant). Etc.) were mixed with soluble starch to form a powder (JP-A-11-71202, JP-A-200
Further, these antibacterial agent compositions have been used by dissolving and diluting powder in tap water or the like.

[0003]

However, the conventional powdery antimicrobial composition has a problem that when dissolved in water, the powder is aggregated into a lump and takes a long time to dissolve. In particular, when packaged in a water-soluble film or water-soluble paper for safe handling, if dissolved as it is, the powdered antibacterial agent composition does not disperse in water but solidifies and has a long time to dissolve. was there.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.

[0005] That is, the present invention provides at least one cationic antibacterial agent (A1) represented by the general formula (1) and one or more cationic antibacterial agents (A2) represented by the general formula (2). A powdery antibacterial composition comprising a cationic antibacterial agent (A), a nonionic surfactant (B), a soluble starch (C) and an organic acid (D).

Embedded image

Embedded image [Wherein, R ¹ and R ^{8 each} have 6 to 22 carbon atoms, and R ² , R ³ and R ⁷
Has 1 to 22 carbon atoms, and R ^{4 to} R ⁶ have 1 to 6 carbon atoms.
Is a linear, branched or cyclic hydrocarbon group, and R ^{1 to} R ⁴ and R ^{6 to} R ⁸ may be bonded to each other to form a ring. Ph represents a phenyl group. ]

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The cationic antibacterial agent (A1) in the present invention is represented by the following general formula (1).

Embedded image In the formula, R ¹ has 6 to 22 carbon atoms (preferably 8 to 18,
More preferably, 8 to 12), and R ² and R ^{3 each} have 1 to 2 carbon atoms.
2 (preferably 1 to 18, more preferably 1 to 12) and of R ^4, R ⁵ are carbon atoms 1 to 6 (preferably 1 to 4, more preferably 1), straight-chain, branched or cyclic, respectively It is a hydrocarbon group, and R ^{1 to} R ⁴ may combine with each other to form a ring. Examples of the hydrocarbon group include an alkyl group, an alkenyl group and a cycloalkyl group. If the number of carbon atoms exceeds 22, the water solubility and the bactericidal effect deteriorate. Specifically, for example, the following [1] and [2] are mentioned. [1] R ¹ and R ² are linear, branched or cyclic alkyl, alkenyl or cycloalkyl groups having 6 to 12 carbon atoms, and R ³ , R ⁴ and R ⁵ are alkyl groups having 1 to 3 carbon atoms Or an alkenyl group [2] wherein R ¹ is a linear, branched or cyclic alkyl, alkenyl or cycloalkyl group having 12 to 20 carbon atoms, and R ^{2 to} R ⁵ are an alkyl or alkenyl group having 1 to 3 carbon atoms. Of [1] and [2], preferred is [1], and more preferred is [1] wherein R ¹ and R ² are decyl groups, R ³ ,
R ⁴ and R ⁵ are methyl groups.

The following are specific examples of the quaternary ammonium group represented by the general formula (1). [1] hexyldecyldimethylammonium, cyclohexyldecyldimethylammonium, octyldecyldimethylammonium, dioctyldimethylammonium, didecyldimethylammonium, decyldodecyldimethylammonium, didodecyldimethylammonium, octyldecylmethylethylammonium,
Dioctylmethylethylammonium, didecylmethylethylammonium, didodecylmethylethylammonium, didecylmethylpropylammonium, didodecylethylpropylammonium, etc. [2] Dodecyltrimethylammonium, cyclododecyltrimethylammonium, tetradecyltrimethylammonium, hexadecyl Trimethylammonium, octadecyltrimethylammonium, dodecyldimethylethylammonium, tetradecyldimethylethylammonium, hexadecyldimethylethylammonium, octadecyldimethylethylammonium, dodecylmethyldiethylammonium, tetradecylmethyldiethylammonium, hexadecylmethyldiethylammonium, octadecylmethyldie Le ammonium, oleyl trimethyl-en
Among these, [1] is preferable, and didecyldimethylammonium is more preferable.

[0008] The cationic antibacterial agent (A2) in the present invention
Is represented by the following general formula (2).

Embedded image In the formula, R ⁶ has 1 to 6 (preferably 1 to 4, more preferably 1) carbon atoms, and R ⁷ has 1 to 22 (preferably 1 to 18, more preferably 1 to 12) carbon atoms and R ^{7 8} has 6 to 22 carbon atoms (preferably 8 to 18, more preferably 1 to 8)
0-16), each of which is a linear, branched or cyclic hydrocarbon group, and R ^{6 to} R ⁸ may be bonded to each other to form a ring. Examples of the hydrocarbon group include an alkyl group, an alkenyl group and a cycloalkyl group. 2 carbon atoms
If it exceeds 2, the water solubility and the bactericidal effect become poor.

Specific examples of the quaternary ammonium group represented by the general formula (2) include cyclohexyldiethylbenzylammonium, octyldiethylbenzylammonium, 2-ethylhexyldibutylbenzylammonium, decyldimethylbenzylammonium, dodecyldimethylbenzylammonium and palm Oil alkyldimethylbenzylammonium, tetradecyldimethylbenzylammonium, hexadecyldimethylbenzylammonium, octadecyldiethylbenzylammonium, docosyldibutylbenzylammonium and the like can be mentioned. Of these, octyldiethylbenzylammonium, octadecyldiethylbenzylammonium, and more preferably decyldimethylbenzylammonium, dodecyldimethylbenzylammonium, coconut oil alkyldimethylbenzylammonium, tetradecyldimethylbenzylammonium, hexadecyldimethylbenzylammonium It is.

The cationic antibacterial agent (A) of the present invention is preferably (A1) alone or in combination of (A1) / (A2) from the viewpoint of antibacterial properties. (A1) / (A
2) When used in combination, the weight ratio of (A1) / (A2) is usually 30/70 to 90/10, and preferably 40/60 to 70/30 from the viewpoint of antibacterial properties.

The cationic antibacterial agent (A) in the present invention is usually prepared by reacting a tertiary amine such as a trialkylamine or a benzyldialkylamine with a carbonate diester in an equivalent amount or more in the presence or absence of a solvent at a reaction temperature of 80 to 200 ° C. ,
Preferably, it is obtained by reacting at 100 to 150 ° C. As the trialkylamine, (A1)
And those having a hydrocarbon group constituting a quaternary ammonium group. Examples of the benzyldialkylamine include those having a hydrocarbon group constituting the quaternary ammonium group in (A2). Alternatively, a primary or secondary amine can be converted to a tertiary amine using the carbonic diester as a quaternizing agent, and then an equivalent or more of the carbonic diester can be reacted in the same manner as described above.

As the nonionic surfactant (B) in the present invention, alkylene oxide (C2-4)
Addition type nonionic surfactant [higher alcohol (C8
18), glycol (2 to 6 carbon atoms), alkylphenol (10 to 24 carbon atoms), higher fatty acid (12 carbon atoms)
To 24) or higher alkylamine (C8 to C24)
To which an alkylene oxide is directly added (Mn1
Polyoxyalkylene glycol (Mn 150 to 6,000) obtained by adding an alkylene oxide to glycol and reacted with a higher fatty acid or the like; polyhydric alcohol (ethylene glycol,
A product obtained by reacting a higher fatty acid with a dihydric to octahydric or higher polyhydric alcohol such as propylene glycol, glycerin, pentaerythritol, or sorbitan) and adding an alkylene oxide to the esterified product (Mn
250 to 30,000), a polyvalent (divalent to octavalent or more) alcohol alkyl (3 to 60 carbon atoms) ether added with an alkylene oxide (Mn 120 to
30,000), fatty acid alkanolamides (C1
4 to 30) to which an alkylene oxide is added (M
n240-30,000)], polyvalent (divalent to octavalent or more) alcohol alkyl (3 to 60 carbon atoms)
Ether and fatty acid alkanolamides (C14
To 30). Of these, preferred are alkylene oxide-added nonionic surfactants, and more preferred are those obtained by directly adding alkylene oxide to higher alcohols and glycols, and those obtained by reacting higher fatty acids and the like with polyoxyalkylene glycol. And those obtained by adding an alkylene oxide to an esterified product obtained by reacting a higher fatty acid with a polyhydric alcohol.

The soluble starch (C) in the present invention comprises:
Modified starch soluble in water, for example, a starch degradation product produced by first acting an acid such as hydrochloric acid, oxalic acid, α-amylase or the like alone or in combination with starch glue, Specific examples include dextrins such as amylodextrin, erythrodextrin, acrodextrin, and maltodextrin.

The organic acid (D) in the present invention includes carboxylic acid, sulfonic acid, sulfinic acid and phenol.

The carboxylic acids include saturated or unsaturated aliphatic, cycloaliphatic and aromatic carboxylic acids, and natural fatty acids. As the saturated or unsaturated aliphatic carboxylic acids (2-32 carbon atoms), monocarboxylic acids (heptanoic acid, octanoic acid, lauric acid, myristic acid, stearic acid, montanic acid, undecylenic acid, oleic acid, erucic acid, Glycolic acid, lactic acid, etc.), polycarboxylic acids [dicarboxylic acids [succinic acid, adipic acid, azelaic acid, fumaric acid, itaconic acid, oxycarboxylic acids (glyceric acid, tartaric acid, malic acid, etc.) etc.], trivalent to tetravalent Or more polycarboxylic acids [1,2,4-
Butanetricarboxylic acid, 1,2,5-hexanetricarboxylic acid, 1,3-dicarboxyl-2-methyl-2-methylenecarboxypropane, oxycarboxylic acid (such as citric acid)], and saturated or unsaturated fats Examples of the cyclic carboxylic acid (C6 to C50) include monocarboxylic acid (cyclohexanecarboxylic acid and the like), polycarboxylic acid [dicarboxylic acid (1,4-cyclohexanedicarboxylic acid and dimer acid and the like), trivalent to tetravalent or Polycarboxylic acids (e.g., 1,2,4-cyclohexanetricarboxylic acid and the like)] and aromatic carboxylic acids (C7 to C16) include monocarboxylic acids (benzoic acid, pt-butylbenzoic acid, salicylic acid) , 2-naphthalenecarboxylic acid, etc.), polycarboxylic acids [dicarboxylic acids (phthalic acid, isophthalic acid, terephthalic acid, , 6-naphthalenedicarboxylic acid, etc.), trivalent to tetravalent or more polycarboxylic acids (1,2,4-benzenetricarboxylic acid, pyromellitic acid, etc.)], and natural fats and oils as coconut oil fatty acids, palm Oil fatty acids, corn oil fatty acids and the like.

Examples of the sulfonic acid include linear or branched aliphatic sulfonic acids [1 to 4 carbon atoms (methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, etc.), 5 carbon atoms.
-20 (hexanesulfonic acid, octanesulfonic acid, etc.)], aromatic sulfonic acid [C6-10 (benzenesulfonic acid, p-toluenesulfonic acid, xylenesulfonic acid, toluenedisulfonic acid, etc.), carbon number 11-11]
26 (hexylbenzenesulfonic acid, dodecylbenzenesulfonic acid, dodecylbenzenedisulfonic acid, etc.). Examples of the sulfinic acid include linear or branched aliphatic sulfinic acids [1 to 4 carbon atoms (methanesulfinic acid, ethanesulfinic acid, propanesulfinic acid, etc.), 5 to 20 carbon atoms (hexanesulfinic acid,
Octanesulfinic acid, dodecylsulfinic acid, etc.)], aromatic sulfinic acid [C6 to C10 (benzenesulfinic acid, p-toluenesulfinic acid, xylenesulfinic acid, etc.), C11 to C26 (hexylbenzenesulfinic acid, dodecyl) Benzenesulfinic acid and the like)]. As the phenol, monohydric phenol [monocyclic (C6 to C20, for example, phenol,
Cresol, butylphenol, octylphenol,
Nonylphenol), polycyclic (C10-20, for example, phenylphenol, naphthol), etc .; divalent phenol [monocyclic (C6-16, for example, hydroquinone,
Resorcinol), polycyclic (13-20 carbon atoms, for example, bisphenol F, bisphenol A, bisphenol S), etc .; trivalent to tetravalent or more phenol [monocyclic (6 to 16 carbon atoms, for example, 1,3,3, 5-trihydroxybenzene), polycyclic (13-20 carbon atoms, e.g.
4-trihydroxybenzophenone) and the like].

Of these organic acids, preferred are saturated or unsaturated carboxylic acids from the viewpoints of antibacterial properties and rust prevention, and more preferred are aliphatic saturated dicarboxylic acids having 4 to 16 carbon atoms, particularly sebacic acid. And adipic acid.

Based on the total weight of (A) to (D), the content of the cationic antibacterial agent (A) is preferably 0.5 to 50% by weight from the viewpoint of sterilization, detergency and powdering. The content of the nonionic surfactant (B) is more preferably 1 to 40% by weight, and preferably 2 to 60% by weight, and more preferably 5 to 5% by weight, from the viewpoint of sterilization, detergency and powdering.
40% by weight, the content of the soluble starch (C) is from 20 to 90% by weight, more preferably from 30 to 90% by weight from the viewpoint of powdering.
The content of the organic acid (D) is preferably from 0.5 to 50% by weight, and more preferably from 1 to 40% by weight, from the viewpoint of the dissolution rate.

The cationic antibacterial agent (A) and the nonionic surfactant (B) contained in the powdered antibacterial agent composition of the present invention.
The weight ratio of (A) / (B) is from the viewpoint of sterilization and detergency.
Preferably 5/95 to 90/10, more preferably 1
0 / 90-60 / 40, especially 15 / 85-50 / 50
It is. Further, the total weight of the cationic antibacterial agent (A) and the nonionic surfactant (B) and the weight ratio of the soluble starch (C) [(A) + (B)] / (C) are determined from the viewpoint of powdering. , Preferably 5/95 to 90/10, more preferably 10
/ 90-60 / 40, especially 15 / 85-50 / 50.

The equivalent ratio of the cationic antibacterial agent (A) to the organic acid (D) contained in the powdered antibacterial agent composition of the present invention is preferably (A) from the viewpoint of dissolution rate, safety and formulation stability. (D) 0.5 to 10 equivalents, more preferably 1 to 5 equivalents, per equivalent.

The powdery antibacterial composition of the present invention comprises
Other additives include water-soluble organic solvents, amphoteric surfactants, anionic surfactants, defoamers (silicone emulsions and the like), pH adjusters [amines (alkanolamines having 2 to 4 carbon atoms, such as monoethanol) Amines, diethanolamines), inorganic alkali agents (caustic soda, caustic potash, etc.), dissolution promoters (sodium carbonate, sodium bicarbonate, etc.) and metal chelating agents [polyamine acetic acid and its salts (EDTA, etc.)] as necessary. it can.

The water-soluble organic solvent is soluble starch (C)
Poor solvent (solubility 0.1g / solvent 100g or less)
Wherein the water-soluble organic solvent is a lower alcohol (1-4 carbon atoms, for example, methanol, ethanol,
Isopropanol), ketone (3-6 carbon atoms, for example, acetone, methyl ethyl ketone), carbitol (3-6 carbon atoms, for example, ethyl carbitol, butyl carbitol), glycol (2-6 carbon atoms, for example, ethylene glycol, propylene glycol) ).

As the amphoteric surfactant, an amino acid type amphoteric surfactant [higher alkylamine (C12 to C18)]
Sodium beta-propionate], betaine-type amphoteric surfactant [alkyl (12-18 carbon atoms) dimethyl betaine], sulfate-type amphoteric surfactant [higher alkyl (8-18 carbon atoms) amine sulfate sodium salt , Hydroxyethylimidazoline sulfate sodium salt, etc.], sulfonate type amphoteric surfactants (pentadecylsulfotaurine, imidazoline sulfonic acid, etc.), phosphate ester type amphoteric surfactants [glycerin higher fatty acid (8 to 22) Esterified phosphoric acid ester amine salt].

Examples of the anionic surfactant include carboxylic acids (saturated or unsaturated fatty acids having 8 to 22 carbon atoms).
(Sodium, potassium, ammonium, alkanolamine and the like) salts, carboxymethylated salts (C8 to C16 aliphatic alcohols and / or E
Carboxymethylated salts such as O (1 to 10 mol) adducts, etc., sulfates [sulfuric esters of higher alcohols (sulfates of fatty acid alcohols having 8 to 16 carbon atoms, etc.)], sulfates of higher alkyl ethers Salt [EO of fatty acid alcohol having 8 to 18 carbon atoms (1 to 10
Mol) adduct sulfates], sulfated oils (natural unsaturated fats and oils or unsaturated waxes neutralized by sulfation as they are), sulfated fatty acid esters (sulfated lower alcohol esters of unsaturated fatty acids) Olefins (sulfurized and neutralized olefins having 12 to 18 carbon atoms), sulfonates [alkylbenzene sulfonates, alkylnaphthalene sulfonates, sulfosuccinic diester type, α- Olefin (C1
2-18) Sulfonate, Igepon T type etc.] and Phosphate ester salt [higher alcohol (C8-60) E
O adduct phosphoric acid ester salt, alkyl (4 to 6 carbon atoms)
0) Phenol EO adduct phosphate ester salt].

The content of the other additives is (A)
Based on the total weight of (D), the water-soluble organic solvent is usually 5
0% or less, preferably 5 to 30%, an amphoteric surfactant is usually 20% or less, preferably 1 to 5%, and an anionic surfactant is usually 10% or less, preferably 1 to 5%.
pH adjusters and metal chelators are usually 10% or less,
Preferably it is 1 to 5%, and the dissolution promoter is usually 30% or less, preferably 3 to 10%.

The method for producing the powdery antibacterial agent composition of the present invention includes, for example, the following method. [1] Soluble starch, which is prepared by mixing a cationic antibacterial agent (A), a nonionic surfactant (B), and other additives as necessary to make a liquid, and then uniformly mixing with another stirring device. It is added to a mixture of (C) and the organic acid (D), and stirred and mixed to obtain a uniform powdery composition. [2] The soluble starch (C) was charged into a stirrer, and the cationic antibacterial agent (A), the nonionic surfactant (B) and, if necessary, other additives were sequentially added and uniformly mixed with stirring. Thereafter, finally, the organic acid (D) is added, and the mixture is stirred and mixed to obtain a uniform powdery composition. [3] A cationic antibacterial agent (A), a nonionic surfactant (B), and other additives as necessary are charged into a stirring device,
After stirring and uniform mixing, soluble starch (C) and organic acid (D) are added and mixed with stirring to obtain a uniform powdery composition. Among them, [1] is preferable, and [3] is more preferable.

The mixing temperature during the production is usually from 5 to 60 ° C., preferably from 20 to 40 ° C. from the viewpoint of powdering, and the stirring speed is usually from 100 to 10,000 rpm from the viewpoint of powdering.
m, preferably 1,000 to 5,000 rpm.
The stirrer is not particularly limited as long as the powder (soluble starch) and the liquid can be uniformly stirred and mixed, and examples thereof include a Henschel mixer and a universal mixer.

The powdered antibacterial detergent can be directly packed in a case made of vinyl or the like and weighed with a measuring cup or the like when used. However, from the viewpoint of handling safety, the powdery antibacterial detergent is used by the user. It can be packed in water-soluble film (such as polyvinyl alcohol film) or water-soluble paper every 10 to 100 g so that it does not come into direct contact with the agent.

The powdered antibacterial agent composition of the present invention is used by dispersing and dissolving in tap water or the like as an antibacterial detergent for food factories, kitchens, super backyards, livestock pens and poultry houses. Water is typically 300 for antibacterial cleaning of floors, walls, ceilings, etc.
After spraying a diluting solution diluted to 600 times and, if necessary, 100 to 1,000 times, rub it with a brush or the like, wash it, and wash it away with a large amount of water. In addition, it is also possible to use such a method that the powdery antibacterial agent composition of the present invention is directly sprayed on a severely soiled portion, rubbed with a small amount of water with a brush or the like, and then washed off with water after the stain is removed.

[0030]

The present invention will be further described by the following examples, which should not be construed as limiting the invention. The numerical values in the examples indicate% by weight.

Examples 1 to 5 were used in the proportions shown in Table 1.
And powdered antimicrobial compositions of Comparative Examples 1 to 3 were prepared. The compounds of the components described by the symbols in Table 1 are as follows. A1-1: Didecyldimethylammonium / methyl carbonate A1-2: Didecylmethylethylammonium / methyl carbonate A2-1: Coconut oil alkyldimethylbenzylammonium / methyl carbonate B-1: EO10 mol of dodecyl alcohol-PO3
Molblock adduct B-2: PO30 mol of propylene glycol-EO
24 mol block adduct B-3: 30 mol PO of propylene glycol-EO
5 mol block adduct stearic acid ester B-4: sorbitan monooleate EO2
0 mol adduct C -1: soluble starch (Pineflow S, manufactured by Matsutani Chemical) D -1: adipic acid D -2: sebacic acid E -1: didecyldimethylammonium chloride E-2: didecyldimethylammonium adipine acid

[0032]

[Table 1]

The following performance evaluations were performed on the powdered antibacterial agent compositions obtained in Examples 1 to 5 and Comparative Examples 1 to 3.
Table 2 shows the results.

<Evaluation of Water Solubility> 500 mL of tap water was put into a 500 mL beaker, 10 g of the powdered antibacterial agent composition was gently poured, and the time required for dissolution without stirring was measured.

<Evaluation of antibacterial activity> The minimum growth inhibitory concentration (MI
C) It was evaluated by a test. That is, Heart is used as a medium.
Using infusion broth (HIB), a commonly used dilution method (ed.
Microbiology training proposal). Examples 1 to 5
And the powdered antimicrobial composition obtained in Comparative Examples 1 to 3 was H
Diluted with IB liquid medium, 0.39-25 ppm
[(A) component concentration] A solution was prepared. Each diluted sample solution 5
mL of the overnight culture (test medium: HI)
B, the number of bacteria: 10 ⁸ to 10 ⁹ cfu / mL) with sterilized water for 50
50 μL of a 0-fold diluted bacterial solution was added and cultured at 37 ° C. overnight. Thereafter, the presence or absence of growth of the test bacteria was observed, and the minimum growth inhibitory concentration (MIC) for inhibiting growth was determined. (Judgment criteria) ○: MIC is less than 2 ppm △: MIC is 2 to 10 ppm ×: MIC is more than 10 ppm

<Evaluation of Rust Prevention> A degreased and polished steel plate (25 ×
(70 × 2 mm) was immersed in a 1% aqueous solution of the powdered antibacterial agent composition at room temperature for 24 hours, and the state of rust generation was observed. (Judgment criteria) ：: No rust was observed. X: Rust is observed.

<Evaluation of Detergency> JIS K 3362 (Synthetic detergent test method) was evaluated according to 7.2 Detergency evaluation method of synthetic detergent for kitchen use. (Judgment Criteria) A: 70% or more detergency with respect to the initial stain was observed. Δ: Detergency of 40% or more and less than 70% with respect to the initial stain was observed. X: Detergency of less than 40% with respect to the initial stain was observed.

[0038]

[Table 2]

In Table 2, Examples 1 to 5 of the present invention all show excellent performance in water solubility, antibacterial property, rustproofing property and washing property. However, all the comparative examples have poor water solubility,
Further, it can be seen that Comparative Example 2 is inferior in rust prevention, and Comparative Example 3 is inferior in washability.

[0040]

The powdery antimicrobial composition of the present invention has the following effects. (1) Dissolves promptly in water. (2) It has an excellent antibacterial effect, and microorganisms are sufficiently controlled. (3) Do not rust metal parts. (4) Excellent cleaning properties. (5) Easy handling.

Claims (6)

[Claims] 1. One or more cationic antibacterial agents selected from the group consisting of a cationic antibacterial agent (A1) represented by the general formula (1) and a cationic antibacterial agent (A2) represented by the general formula (2) A powdery antibacterial composition comprising (A), a nonionic surfactant (B), a soluble starch (C) and an organic acid (D). Embedded image Embedded image [Wherein, R ¹ and R ^{8 each} have 6 to 22 carbon atoms, and R ² , R ³ and R ⁷
Has 1 to 22 carbon atoms, and R ^{4 to} R ⁶ have 1 to 6 carbon atoms.
Is a linear, branched or cyclic hydrocarbon group, and R ^{1 to} R ⁴ and R ^{6 to} R ⁸ may be bonded to each other to form a ring. Ph represents a phenyl group. ] 2. The method according to claim 1, wherein (A1) and / or (A2) is 3
2. The composition according to claim 1, which is a cationic antibacterial agent obtained by reacting a secondary amine with an equivalent or more of carbonic acid diester. 3. The weight ratio (A) / (B) of the cationic antibacterial agent (A) to the nonionic surfactant (B) is from 10/90.
60/40, and the weight ratio of the total weight of (A) and (B) to the soluble starch (C) [(A) + (B)] / (C) is 10
The composition according to claim 1, wherein the ratio is from 90/60 to 60/40. 4. The composition according to claim 1, wherein (D) is an organic acid selected from the group consisting of carboxylic acids, sulfonic acids, sulfinic acids and phenols. 5. The method according to claim 1, further comprising a water-soluble organic solvent, an amphoteric surfactant, an anionic surfactant, an antifoaming agent, a pH adjuster, a dissolution promoter and / or a metal chelating agent. The composition of any of the preceding claims. 6. The composition according to claim 1, which is packaged with a water-soluble film or water-soluble paper.