JPH11269499A - Two-component cleaning agent for automatic dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-component cleaning agent which exhibits an excellent detergency in cleaning starch dirt such as rice particles, protein dirt such as egg-derived dirt, and oily dirt attached to dishes made of porcelain, glass, metal, or plastic. SOLUTION: This agent comprises an aq. soln. contg. (A) an oxygen-base bleaching agent and an aq. soln. contg. (B) an alkali compd. and (C) a surfactant. The wt. ratio of (A):(B):(C) is 1:(0.01-40):(0.01-40); and (C) is pref. a nonionic or amphoteric surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to automatic dishwashing which has excellent cleaning properties against starch stains such as rice grains, protein stains such as eggs, and oil stains attached to porcelain, glass, metal and plastic dishes. The present invention relates to a two-part cleaning agent for machines.

[0002]

2. Description of the Related Art Conventionally, as a detergent for automatic dishwashers used in kitchens of hotels, restaurants and the like, a detergent composition comprising an alkali agent and a surfactant (for example, JP-A-6-228600) Japanese Patent Application Laid-Open No. H07-19753) and a detergent composition comprising a surfactant and an enzyme and an alkali agent.
-179900).

[0003]

However, those containing an alkali agent and a surfactant can remove oil stains, but have insufficient cleaning properties for starch stains such as rice grains and protein stains such as eggs. There's a problem. Therefore, in order to improve the detergency of starch stains and protein stains, surfactants containing an enzyme and an alkali agent have been proposed, but there is a problem that the detergency is still insufficient. At present, in order to completely remove starch stains and protein stains, they are immersed in water containing a surfactant and then hand-washed before washing with an automatic dishwasher. SUMMARY OF THE INVENTION An object of the present invention is to provide a two-part cleaning agent for automatic dishwashers, which can wash starch stains and protein stains to which rice grains and the like adhere firmly without immersion and washing.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have found that a specific detergent composition meets this object, and have reached the present invention. That is, the present invention provides a two-component automatic dishwasher comprising (A) an aqueous solution containing an oxygen bleach and (B) an aqueous solution containing an alkali compound and (C) a surfactant. It is a liquid type cleaning agent.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The cleaning composition of the present invention comprises (A)
And an aqueous solution containing (B) and (C) in an automatic dishwasher.

As (A) of the present invention, hydrogen peroxide, percarbonate, perborate, persulfate, perphosphate, organic peracid, and the like are used.
Potassium), ammonium salts and the like. Specific examples include sodium peroxocarbonate, potassium peroxocarbonate, sodium peroxoborate, potassium peroxoborate, potassium peroxomonosulfate, potassium peroxodisulfate, ammonium peroxodisulfate, sodium peroxide pyrophosphate, peracetic acid, persuccinic acid, perphthalic acid Acids and the like.

The (B) of the present invention is not particularly limited. For example, hydroxides, carbonates, bicarbonates, borates and silicates of alkali metals (sodium and potassium) are used. Examples include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, sodium borate, potassium borate, sodium silicate, potassium silicate, sodium metasilicate, and the like.

As (C) of the present invention, any of nonionic, anionic, cationic and amphoteric surfactants may be used, but nonionic or amphoteric surfactants are preferred. These may be used alone or in combination of two or more.

The nonionic surfactant (C) includes an alkylene oxide-added nonionic surfactant (a1) and a polyvalent alcohol-type nonionic surfactant (a2).

The alkylene oxide used in (a1) includes, for example, ethylene oxide, propylene oxide and butylene oxide. Preferred among these are ethylene oxide and random or block adducts of ethylene oxide and propylene oxide.

As (a1), (a1-1) polyoxyalkylene alkyl ether (alkyl having 1 carbon atom)
To 20), (a1-2) polyoxyalkylenealkylphenyl ether (alkyl carbon number: 1 to 20),
(A1-3) Polyoxyalkylene alkylamino-
Ter (alkyl carbon number: 1 to 20) is exemplified.

Specific examples of (a1-1) include octyl alcohol ethylene oxide adduct, 2-ethylhexyl ethylene oxide adduct, 2-ethylhexyl ethylene oxide propylene oxide block adduct, lauryl alcohol ethylene oxide adduct, stearyl alcohol ethylene Oxide adducts, oleyl alcohol ethylene oxide adducts, lauryl alcohol ethylene oxide propylene oxide block adducts and the like can be mentioned. Specific examples of (a1-2) include nonylphenol ethylene oxide adduct, nonylphenol ethylene oxide propylene oxide block adduct, octylphenol ethylene oxide adduct, bisphenol A ethylene oxide adduct, dinonylphenol ethylene oxide adduct, and the like. Specific examples of (a1-3) include laurylamine ethylene oxide adduct, stearylamine ethylene oxide adduct, and the like.

Examples of the polyhydric alcohol used in (a2) include ethylene glycol, propylene glycol, glycerin, trimethylolpropane, neopentyl alcohol, pentaerythritol, sorbitan, sorbitol, sucrose and glucose. And the like.

Specific examples of (a2-1) include pentaerythritol monobutyl ether, pentaerythritol monolauryl ether, sorbitan monomethyl ether, sorbitan monostearyl ether, methyl glycoside, lauryl glycoside and the like. (A2-
Specific examples of 2) include sorbitan monostearyl ether ethylene oxide adduct, methyl glycoside ethylene oxide propylene oxide random adduct,
Lauryl glycoside ethylene oxide adduct, stearyl glycoside ethylene oxide propylene oxide random adduct and the like. The addition mole number of the alkylene oxide is usually 1 to 20.

Examples of the anionic surfactant include carboxylic acid or its salt (b), sulfate or its salt (c), sulfonic acid or its salt (d), and phosphoric ester or its salt (e).

As the carboxylic acid or its salt (b),
A saturated or unsaturated fatty acid having 8 to 22 carbon atoms or a salt thereof; a salt of a carboxymethylated product of an aliphatic alcohol having 8 to 16 carbon atoms; and a 1 to 10 mol adduct of ethylene oxide with an aliphatic alcohol having 8 to 16 carbon atoms. Carboxymethylated salts such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, oleic acid, linoleic acid, ricinoleic acid and coconut oil, palm kernel oil, Mixture of higher fatty acids obtained by saponifying rice bran oil, beef tallow, etc., salts of octyl alcohol carboxymethylate, salts of decyl alcohol carboxymethylate, salts of lauryl alcohol carboxymethylate, carboxymethyl adduct of octyl alcohol ethylene oxide 3 mol Chloride, lauryl alcohol Salts of Chi alkylene oxide 4 mol adduct carboxymethylated and the like. Examples of the salt include salts thereof such as sodium, potassium, ammonium and alkanolamine.

Specific examples of (c) include, as alkyl sulfates (alkyl having 4 to 20 carbon atoms), octyl sulfate, decyl sulfate, lauryl sulfate, stearyl sulfate; higher alcohols ( C8-20) Sulfuric acid ester of ethylene oxide adducts: lauryl alcohol ethylene oxide 2 mol adduct sulfate ester, octyl alcohol ethylene oxide 3 mol adduct sulfate salt, castor oil, peanut oil, olive oil, rapeseed oil, Examples include sodium, potassium, ammonium, and alkanolamine salts of sulfates such as tallow and sheep tallow.

Examples of the sulfonate (d) include alkylbenzene sulfonates (alkyl having 8 to 20 carbon atoms),
Alkyl naphthalene sulfonate (alkyl carbon number:
8-20), sulfosuccinic acid dialkyl ester type (alkyl carbon number: 8-20), α-olefin sulfonate (carbon number 8-20), alkyldiphenyl disulfonic acid salt and the like. Examples of the salt include alkali metals (sodium and potassium).

Specific examples of (d) include sodium dodecylbenzenesulfonate, sodium dodecylnaphthalenesulfonate, sodium salt of di-2-ethylhexyl sulfosuccinate, sodium salt of nonyldiphenyldisulfonate, and the like.

Examples of the phosphoric acid ester salt (e) include alkyl phosphoric acid ester salts and higher alcohol ethylene oxide adduct phosphoric acid ester salts.

Specific examples of (e) include disodium lauryl phosphate monosodium salt, sodium lauryl phosphate diester, and disodium phosphate monoester phosphate 5 mol adduct of oleyl alcohol ethylene oxide.

Examples of the cationic surfactant include a quaternary ammonium salt type and an amine salt type. As the quaternary ammonium salt type, tertiary amines (lauryl dimethylamine, didecylmethylamine, etc.) and quaternizing agents (alkylating agents such as methyl chloride, methyl bromide, ethyl chloride, benzyl chloride, dimethyl sulfate; Ethylene oxide).
For example, lauryl trimethyl ammonium chloride,
Didecyl dimethyl ammonium chloride, dioctyl dimethyl ammonium bromide, stearyl trimethyl ammonium bromide, lauryl dimethyl benzyl ammonium chloride (benzalkonium chloride), cetyl pyridinium chloride, polyoxyethylene trimethyl ammonium chloride and the like.

As the amine salt type, the primary to tertiary amines can be converted into an inorganic acid (hydrochloric acid, nitric acid, sulfuric acid, hydroiodic acid, etc.) or an organic acid (acetic acid, formic acid, oxalic acid, lactic acid, gluconic acid, adipic acid, carbon dioxide). (E.g., alkylphosphoric acid of formulas 1 to 18). Examples of the primary amine salt type include inorganic or organic acid salts of aliphatic higher amines having 8 to 20 carbon atoms (higher amines such as laurylamine, stearylamine, cetylamine, hardened tallowamine, and rosinamine). Higher fatty acid (stearic acid, oleic acid, etc.) salts of lower amines; Examples of the secondary amine salt type include an inorganic acid salt or an organic acid salt such as an ethylene oxide adduct of an aliphatic amine. The number of moles of ethylene oxide to be added is usually 1 to 20. Examples of the tertiary amine salt type include aliphatic amines having 1 to 20 carbon atoms (triethylamine, ethyldimethylamine, N, N, N ′,
N′-tetramethylethylenediamine, etc.), alicyclic amines (N-methylpyrrolidine, N-methylpiperidine,
N-methylhexamethyleneimine, N-methylmorpholine, 1,8-diazabicyclo (5,4,0) -7-undecene and the like, nitrogen-containing heterocyclic aromatic amines (4-dimethylaminopyridine, N-methylimidazole, 4,
Inorganic or organic acid salts of 4′-dipyridyl); and inorganic or organic acid salts of tertiary amines such as stearamidoethyldiethylmethylethanolamine.

Examples of the amphoteric surfactant include (1) a carboxylate type amphoteric surfactant, (2) a sulfate ester type amphoteric surfactant, (3) a sulfonate type amphoteric surfactant,
(4) Phosphate ester type amphoteric surfactants and the like can be mentioned. (1) Carboxylate type amphoteric surfactants further include amino acid type amphoteric surfactants and betaine type amphoteric surfactants.

Examples of the carboxylate-type amphoteric surfactant include amino acid-type amphoteric surfactants, betaine-type amphoteric surfactants, and imidazoline-type amphoteric surfactants. An amphoteric surfactant having an amino group and a carboxyl group in the molecule, for example, a compound represented by the following general formula (1). _{[R-NH- (CH 2)} n -COO] m M (1) [ wherein, R represents a monovalent hydrocarbon group having 1 to 20 carbon atoms; n is usually 1 or 2; m is 1 or 2; M is a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, an amine,
It is a cation such as alkanolamine. Specific examples include alkylaminopropionic acid-type amphoteric surfactants (such as sodium stearylaminopropionate and sodium laurylaminopropionate); and alkylaminoacetic acid-type amphoteric surfactants (such as sodium laurylaminoacetate). Can be

The betaine type amphoteric surfactant is an amphoteric surfactant having a quaternary ammonium salt type cation portion and a carboxylic acid type anion portion in the molecule.
Alkyl dimethyl betaine represented by the following general formula (2) (eg, stearyl dimethyl amino acetate betaine, lauryl dimethyl amino acetate betaine), amido betaine (eg, coconut oil fatty acid amide propyl betaine), and alkyl dihydroxyalkyl betaine (eg, lauryl dihydroxyethyl betaine). And the like. In the formula, X ¹ is an alkyl group having 1 to 20 carbon atoms,
An alkyl amide group of 20; X ² is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and the like hydroxyalkyl group.

Further, examples of the imidazoline-type amphoteric surfactant include 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine.

Other amphoteric surfactants include, for example, glycine-type amphoteric surfactants such as sodium lauroyl glycine, sodium lauryl diaminoethyl glycine, lauryl diaminoethyl glycine hydrochloride, dioctyl diaminoethyl glycine hydrochloride; pentadecyl sulfotaurine And sulfobetaine-type amphoteric surfactants.

(A): (B) in the cleaning agent of the present invention:
The weight ratio of (C) is preferably 1: (0.01 to 4
0): (0.01 to 40), more preferably 1:
(0.1 to 10): (0.1 to 10). The content of (A) in the aqueous solution is usually 1 to 50% by mass, and the contents of (B) and (C) in the aqueous solution are usually 1 to 50% by mass.

The detergent of the present invention is used by mixing an aqueous solution containing (A) and an aqueous solution containing (B) and (C) in an automatic dishwasher.

Further, the cleaning agent of the present invention may contain an antifoaming agent, a chelating agent, an enzyme, a fragrance and the like, if necessary.

[0032]

EXAMPLES The present invention will be described in detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.

Examples 1 to 10 and Comparative Examples 1 to 4 Detergent compositions shown in Table 1 were prepared and subjected to a detergency test. The results are shown in Table 1.

[0034]

[Table 1]

<Detergency Test> Preparation of Contaminated Dish In a porcelain dish having a diameter of 25 cm, retort curry and rice,
Water was mixed at a ratio of 1: 1: 1, and 10 g of a paste mixed with a mixer was applied and dried at room temperature for 24 hours before use. Cleaning method 30 g of an aqueous solution containing (A) and an aqueous solution containing (B) and (C) in the detergents of Examples 1 to 9 using a fully automatic dishwasher NP-5800 manufactured by Matsushita Electric Industrial Co., Ltd. 30g
Was mixed in an automatic dishwasher and washed at 60 ° C. for 4 minutes. 60 g of the detergent compositions of Comparative Examples 1 to 4 were placed in an automatic dishwasher and washed at 60 ° C. for 4 minutes. Detergency Evaluation Method After the washed dishes were dried at room temperature for 24 hours, the weight of the dishes was measured. The washing rate was determined from the weight of the dish before washing by the following equation. Cleaning rate (%) = {(S1-S2) / (S1-S0)} ×
100 In the formula, S0 is the weight of the dish before dirt application, S1 is dirt application,
The weight of the dish after drying, S2 represents the weight of the dish after washing and drying.

[0036]

The detergent composition of the present invention has excellent detergency against starch stains such as rice grains adhered to porcelain, glass, metal and plastic dishes, protein stains such as eggs, and oil stains. It is extremely useful as a detergent for automatic dishwashers.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C11D 3/395 C11D 3/395 17/08 17/08

Claims (3)

[Claims] 1. An automatic dishwasher comprising an aqueous solution containing an oxygen bleaching agent (A) and an aqueous solution containing an alkali compound (B) and a surfactant (C). Liquid type cleaning agent. 2. The weight ratio of (A) :( B) :( C) is:
The cleaning agent according to claim 1, wherein the ratio is 1: (0.01 to 40): (0.01 to 40). 3. The cleaning agent according to claim 1, wherein (C) is a nonionic surfactant or an amphoteric surfactant.