JPH05311200A - Alkaline detergent - Google Patents

Abstract

PURPOSE:To obtain an alkaline detergent, composed of an aqueous solution containing a specific surfactant and an alkaline agent, excellent in stability and operating efficiency and useful as a detergent for hard surfaces, a penetrant, etc. CONSTITUTION:The detergent is constructed of an aqueous solution containing (A) preferably 0.1-10wt.% surfactant selected from (i) compounds of formula I and/or (ii) compounds of formula II [R is 6-20C alkyl, 6-20C alkenyl or 4-12C alkyl-containing alkylphenyl; (R' O)x indicates average Xmol of an added 2-4C alkylene oxide; M is H or base; X is 0-20; m and n are 1 or 2; (m+n) is 3] and (B) preferably 1-30wt.% alkaline agent such as sodium hydroxide.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to detergents. More specifically, it relates to an alkaline detergent which has a high detergency against oil stains and the like, and which contains a surfactant in a stable manner.

[0002]

2. Description of the Related Art Conventionally, as an alkaline cleaning agent, a surfactant which is insoluble in an alkaline aqueous solution is preliminarily blended with a solubilizing agent so as to be one liquid (for example, JP-A-1-301).
799), a mixture of an alkali agent and a surfactant when used (for example, Japanese Patent Publication No. 2-55799).
No. gazette) is known.

[0003]

However, the above-mentioned compositions have insufficient stability during storage, and the composition of (1) has a problem of poor workability because they must be mixed each time they are used.

[0004]

Means for Solving the Problems The present inventor has made diligent studies in order to solve these problems and obtain an alkaline detergent having a detergency equal to or higher than that of the conventional one. As a result, the alkaline agent and the surfactant are stabilized. It was found that the composition can be a one-component composition containing the above-mentioned composition, and that this composition also has a high detergency, and reached the present invention.

That is, the present invention provides a compound (A-1) represented by the following general formula (1) and / or a general formula (2) below.
An alkaline detergent comprising an aqueous solution containing a surfactant (A) selected from the compound (A-2) represented by and an alkaline agent (B). RO (R'O) _x CH ₂ CH (OH) CH ₂ SO ₃ M (1) (In each formula, R is a linear or branched alkyl group having 6 to 20 carbon atoms, a linear or branched alkenyl group having 6 to 20 carbon atoms, or a linear or branched alkyl group having 4 to 12 carbon atoms. An alkylphenyl group having a group; (R′O) _x has 2 to 2 carbon atoms
4 shows that the alkylene oxide of 4 is added on average X moles; M is hydrogen or a base; X is 0 to 20; m,
n is either 1 or 2; m + n = 3)

Specific examples of R in the general formulas (1) and (2) include direct groups such as n-hexyl, n-octyl, n-decyl, n-dodecyl, n-tetradecyl, n-hexadecyl and n-octadecyl. Chain alkyl group; 2-ethylhexyl, 2-hexyldecyl, isostearyl, and other branched-chain alkyl groups; oleyl, linoleyl, and other straight-chain or branched-chain alkenyl groups; butylphenol, octylphenol, nonylphenol, and other straight-chain or branched-chain carbon groups Examples thereof include an alkylphenyl group having an alkyl group of 4 to 12. (R′O) means that an alkylene oxide having 2 to 4 carbon atoms is added in an average X moles, and specific examples of the alkylene oxide include ethylene oxide, propylene oxide, butylene oxide and the like. Ethylene oxide and propylene oxide are preferred.
The alkylene oxide may be one type or two or more types, and when two or more types are added, the addition form may be random addition or block addition. X is the average number of moles added, and is usually 0 to 20, preferably 2 to 10. M is
A hydrogen atom or a base, an alkali metal such as sodium and potassium; an alkaline earth metal such as calcium and magnesium; an aliphatic amine base having 1 to 4 carbon atoms such as methylamine, ethylamine, propylamine, ethylenediamine, diethylenetriamine; ammonium. Group; alkanolamine bases such as monoethanolamine, diethanolamine, triethanolamine and the like. Of these, preferred is sodium and potassium. m and n are 1 or 2. Preferably,
m is 1 and n is 2.

As a method of producing (A-1), there is a method of reacting alcohols or alkylene oxide adducts thereof with epichlorohydrin and then reacting cyclized glycidyl ether with bisulfite. There is also a method of reacting alcohols or alkylene oxide adducts thereof with epichlorohydrin and then reacting with sulfite. As the production method of (A-2), there is a method of reacting alcohols or alkylene oxide adducts thereof with epichlorohydrin and then reacting cyclized glycidyl ether with phosphoric acid. There is also a method in which alcohols or alkylene oxide adducts thereof are reacted with epichlorohydrin, and then glycidyl ether which is ring-closed is reacted with phosphoric acid and then neutralized.

Examples of the alkaline agent (B) in the present invention include alkali metal hydroxides (sodium hydroxide, potassium hydroxide, etc.), alkali metal salts of silicic acids (sodium orthosilicate, sodium metasilicate, etc.), and phosphoric acids. Examples thereof include metal salts (sodium tripolyphosphate, sodium metaphosphate, etc.), amines (ethylenediamine, alkanolamine, etc.), and the like.

If desired, the detergent of the present invention may contain an antifoaming agent. As the defoaming agent, any defoaming agent that is generally used for detergents may be used, and examples thereof include polyalkylene glycol-based defoaming agents [for example, Sanyo Kasei Kogyo Co., Ltd., Karalin DF] and the like. If desired, the cleaning agent of the present invention may contain a chelating agent. Examples of the chelating agent include ethylenediaminetetraacetic acid, gluconic acid, polyacrylic acid, and salts thereof. Among these, preferred is ethylenediaminetetraacetic acid, and salts thereof. In the present invention, other nonionic surfactants [for example, Sanyo Chemical Industry Co., Ltd., Nonipol 100] and other anionic surfactants [for example, Sanyo Chemical Industry Co., Ltd., Sandet AL
H] may also be included. The amount of each component constituting the detergent of the present invention may be adjusted according to the purpose, but the weight ratio is usually as follows. The amount of the surfactant (A-1) and / or (A-2) is usually 0.01 to 30%, preferably 0.1 to 10%, and the amount of the alkaline agent (B) is
It is usually 0.1 to 50%, preferably 1 to 30%.
The balance is other optional ingredients and water.

The surfactants (A-1) and / or (A-2) of the present invention are alkaline agents such as hard surface cleaning agents such as metals, glass, plastics, and composite materials thereof, penetrants, refining agents and the like. Besides the cleaning agent, it can be used as a general cleaning agent.

As an example of the method for producing the cleaning agent of the present invention, the surfactant (A-1) and / or (A-2) and, if necessary, the optional components exemplified above in an aqueous solution of the alkaline agent (B). The cleaning agent of the present invention is obtained by charging and mixing.

[0012]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. In the following description, parts and% represent parts by weight and% by weight, respectively. The alkaline cleaner of the present invention was obtained based on the formulation shown in Table 1 below. Then, the appearance and detergency of the detergent composition were evaluated by the test methods shown below.

[0013]

[Table 1]

The abbreviations of the active agents in the formulations shown in Table 1 represent the following compounds. <Example> [Sulfonate] (A-1) (A-1) -1: RO (R'O) _x = n-decanol residue, M = sodium (A-1) -2: RO (R 'O) _x = n-dodecanol ethylene oxide average 7 mol adduct residues, M = potassium (A-1) -3: RO (R'O) _x = 2-decanol ethylene oxide average 5 mol adduct residues, M = sodium (A-1) -4: RO (R'O) _x = n-decanol ethylene oxide average 7 moles / propylene oxide average 5 moles random adduct residue, M = sodium (A-1) -5: RO (R'O) _x = nonylphenol ethylene oxide average 9 mol adduct residue, M = sodium [phosphate] (A-2) (A-2) -1: RO (R'O) _x = 2-ethylhexyl Alcohol residue, m = 1, n = 2, M = sodium (A-2) -2: RO (R'O) _x = n-decanol ethylene oxide average 7 mol adduct residue, m = 1, n = 2, M = potassium (A-2) -3: RO (R'O) x = 2- Dode mosquito Nord ethyleneoxy preparative Bu average 5 Le adduct residue, m = 1, n = 2 , M = sodium (A-2) -4: RO (R'O) x = n- des Cats Nord ethyleneoxy preparative Bu average 7 moles / propylene Ren'okishito Bu average 5 Moruranta Bu beam adduct Residue, m = 1, n = 2, M = sodium (A-2) -5: RO (R'O) _x = nonylphenol ethylene oxide average 4 mol adduct residue, m = 1, n = 2, M = Sodium <Comparative Example> (A ')-1: (nonylphenyl) phenyl ether sodium disulfonate (A')-2: Nonylphenol ethylene oxide average 9 mol adduct

Method of Testing the Appearance of the Detergent The mixture was mixed according to the formulation shown in Table 1 and stirred for 10 minutes, and then the appearance after standing for 1 hour is observed. ◯: No separation or precipitation X: Separation or precipitation Detergency test method 0.1 g of a mixture of 2 parts of carbon black and 100 parts of soybean oil was evenly applied to a mild steel plate (70 × 20 mm) by a brush, and 175 to 175 What was baked at 180 ° C. for 1 hour was air-cooled to prepare a test piece with oil stains. The alkaline cleaning agent shown in Table 1 was diluted 10 times to prepare a cleaning solution.
After soaking the test piece in the washing solution at 30 ° C for 30 seconds,
Was washed with water in still water for 10 seconds and then dried. Next, a cellophane tape was attached to the washed test piece, and the remaining stains were transferred to the cellophane tape when peeled off. Therefore, this cellophane tape was attached to a white paper, and the reflectance was measured with an AKA phototube colorimeter to obtain the washing rate. Cleaning rate (%) = (RW−RS) / (RO−RS) × 1
00 RO: reflectance of original blank paper RS: reflectance of test piece before washing RW: reflectance of test piece after washing

[0016]

The composition of the present invention has the following effects. (1) Good stability. The conventional one-pack alkaline cleaner has a problem in stability. (2) Good workability. The conventional two-liquid alkaline cleaner required time and effort for mixing. (3) High cleaning power against oil stains. Because of the above effects, the composition of the present invention is useful as an alkaline cleaner.

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Claims (2)

[Claims] 1. A compound represented by the following general formula (1) (A-
1) and / or an alkaline cleaning comprising an aqueous solution containing a surfactant (A) selected from a compound (A-2) represented by the following general formula (2) and an alkaline agent (B). Agent. RO (R'O) _x CH ₂ CH (OH) CH ₂ SO ₃ M (1) (In each formula, R is a linear or branched alkyl group having 6 to 20 carbon atoms, a linear or branched alkenyl group having 6 to 20 carbon atoms, or a linear or branched alkyl group having 4 to 12 carbon atoms. An alkylphenyl group having a group; (R′O) _x has 2 to 2 carbon atoms
4 shows that alkylene oxide of 4 is added on average X moles; M is hydrogen or a base; X is 0 to 20; m,
n is either 1 or 2; m + n = 3) 2. General formula (1) and / or general formula (2)
The alkaline detergent according to claim 1, wherein the average added mole number X in the formula is 2 to 10.