JPH06108092A - Strongly alkaline liquid detergent composition - Google Patents

Abstract

PURPOSE:To obtain a liquid detergent composition in which detergent components are stably mixed and which has an excellent ability to clean oily or fatty contaminants deposited on a hard surface of, e.g. metal. CONSTITUTION:This composition contains at least 25wt.% caustic soda and/or caustic potash, 0.1-5wt.% surfactant containing at least one anionic surfactant, 0.1-10wt.% chelating agent selected from among a hydroxy carboxylic acid, an amino carboxylic acid or a salt thereof, and a water-soluble polymer, and 5-30wt.% of at least two stabilizing agents selected from at least between two of four groups, i.e., a group (1) of salts of alkyl ether sulfate represented by the formula R1O(C2H4O)nSO3M, a group (2) of alcohols, such as ethanol, a group (3) of polyhydric alcohols, such as propylene glycol, and a group (4) of glycol ether solvents, such as 3-methyl-methoxybutanol, 3-methoxybutanol and 3- methyl-1,3-butanediol. In the formula, R1 is 1-8C linear or branched alkyl; n is 0 to 4; and M is sodium, potassium, ammonium, monoethanolamine, diethanolamine or triethanolamine salt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strong alkaline liquid detergent composition capable of easily removing stains derived from fats and oils adhering to hard surfaces such as metal, glass, ceramics and plastics.

[0002]

2. Description of the Related Art Oils and fats generate heat when left for a long time.
It is converted to a brown viscous resinous substance by the effect of light and oxidation in the air. The modified oil / fat thus formed is a stubborn stain and cannot be easily removed by an ordinary cleaning agent, and therefore various cleaning agents have been proposed.

As a cleaning agent used for this purpose, an alkaline cleaning agent containing a caustic soda, a caustic potash, an alkali agent such as alkali silicate, a surfactant, a solvent and the like is conventionally known. As for the cleaning action, alkali reacts with denatured oils and fats to produce fatty acid soap, and further surfactants,
It is removed by emulsification, dispersion and solubilization with a solvent.

In order to enhance the cleaning effect, a strong alkaline agent,
Detergent compositions having an increased content of surfactant are already known, but the surfactant and other components are dissolved by the inorganic strong alkaline agent to form a strong electrolyte concentrated solution, and the water of hydration necessary for dissolution is obtained. It is deprived and components are deposited due to the salting-out effect, and it is very difficult to obtain a uniform and high-concentration liquid detergent composition, and it is almost impossible to add a detergent such as a solvent or a chelating agent for improving detergency. It is possible. Therefore, when it is necessary to use a strong alkali agent and a surfactant together, use as a powder or solid composition, or as a two-liquid type when handling as a liquid, and mix two liquids at the time of use. The current situation is to use the method. However, when a powdery strong alkaline detergent is used, the strong alkaline agent component is scattered in the air, and when dissolved, it adheres to the human body due to bounce of the strong alkaline solution, etc., which is problematic in terms of safety. Further, the type in which two liquids are mixed and used has a drawback that the concentration adjustment and mixing operation of both liquids are troublesome.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a strong alkaline liquid detergent composition having stable cleaning ingredients such as a surfactant and a chelating agent, which is excellent in detergency.

[0006]

The strong alkaline liquid detergent composition of the present invention comprises the following (a), (b), (c),
It is characterized by including each component of (d). (A) Caustic soda and / or caustic potash: 25% by weight or more. (B) Surfactant containing at least one anionic surfactant: 0.1 to 5% by weight. (C) Chelating agent selected from hydroxycarboxylic acid, aminocarboxylic acid or salt thereof or water-soluble polymer: 0.1 to 10% by weight (d) Alkyl ether sulfate ester salt of the following chemical formula 3, alcohol, polyhydric alcohol and Two or more stabilizers selected from at least two groups of glycol ether solvents to groups: 5 to 30% by weight.

[0007]

Embedded image R ₁ O (C ₂ H ₄ O) nSO ₃ M (R ₁ : C _{1 to} C ₈ linear or branched alkyl group n: 0 to 4 M: sodium, potassium, ammonium, mono Ethanolamine, diethanolamine or triethanolamine salt)

[0008]

DETAILED DESCRIPTION OF THE INVENTION

The component (a), caustic soda and / or caustic potash, has the effect of saponifying the denatured oils and fats and promoting their removal. The content is 25% by weight or more, preferably 30-40% by weight. In particular, the use of caustic soda is preferable.

The surfactant as the component (b) accelerates the wetting, permeating and emulsifying action of oils and fats, and contains at least one anionic surfactant. The blending amount of the component (b) surfactant is 0.1 to 5% by weight, preferably 0.1.
~ 3% by weight.

Examples of the anionic surfactant include straight chain or branched chain alkyl (C ₈ -C ₂₂ ) benzene sulfonate, long chain alkyl (C ₈ -C ₂₂ ) sulfonate, and long chain olefin (C ₈ To C ₂₂ ) sulfonate, long chain alkyl (C _{8 to} C ₂₂ ) sulfate ester salt, polyoxyethylene (p = 1 to 6) long chain alkyl (C _{8 to} C ₂₂ ) ether sulfate ester salt, polyoxyethylene (p = 1 to 10) alkyl (C ₈ ~C ₂₂₎ phenyl ether sulfuric ester salts, alkyl (C ₈ ~C ₂₂₎ diphenyl ether disulfonates, saturated and / or unsaturated fatty acid salts having 10 to 24 carbon atoms Can be mentioned. Here, p represents the average number of moles of oxyethylene added.

These anionic surfactants may be used alone or in combination of two or more, and further, they may be used together with a nonionic surfactant, an amphoteric surfactant and a cationic surfactant. You may combine and may comprise surfactant.

When the cleaning agent is diluted and washed, the chelating agent as the component (c) is a fatty acid salt produced by saponifying caustic soda and / or caustic potash as a component (a) to fats and oils.
Polyvalent metal ions present in water (eg Ca ² +, Mg
² ) suppresses the formation of sparingly soluble metal soap due to reaction with
It has the effect of further enhancing the cleaning effect, and the compounding amount is 0.1
10 to 10% by weight, preferably 0.5 to 5% by weight.

Examples of chelating agents include hydroxycarboxylic acids such as malic acid, citric acid, gluconic acid and heptonic acid, or salts thereof; iminodiacetic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, cyclohexane- Aminopolycarboxylic acids such as 1,2-diaminetetraacetic acid and N-hydroxyethylethylenediaminetriacetic acid or salts thereof; polyacrylic acid, acrylic acid-maleic acid copolymers, styrene-maleic acid copolymers, styrene sulfone Examples thereof include acids or salts of water-soluble polymers such as acid-maleic acid copolymers and isoamylene-maleic anhydride copolymers. The water-soluble polymer preferably has a weight average molecular weight of 1,000 to 10,000.

The component (d) is indispensable for stabilizing the composition, and its content is 5 to 30% by weight, preferably 10%.
Is about 20% by weight. As the stabilizer of the component (d),
The following four groups of stabilizers are used in combination: At this time, two or more different groups are always selected, one or more compounds are selected from each group, and two or more kinds are used in combination. Even if two kinds of alcohols from the same group, for example, alcohols are used together, the effect of the present invention cannot be obtained.

Further, a more excellent stabilizing effect can be obtained by selecting three or more different groups, selecting one or more compounds from each group and using three or more kinds in combination. Group: Alkyl ether sulfate ester salt represented by Chemical formula 4, for example, polyoxyethylene (p = 1 to 4) alkyl (C _{2 to} C ₈ ) ether sulfate ester salt

[0016]

Embedded image R ₁ O (C ₂ H ₄ O) nSO ₃ Na (R ₁ : C _{1 to} C ₈ straight-chain or branched alkyl group n: 0 to 4 M: sodium, potassium, ammonium , Monoethanolamine, diethanolamine or triethanolamine salt)

Group: Lower alcohols such as ethanol and propyl alcohol Group: Polyhydric alcohols such as ethylene glycol, propylene glycol and hexylene glycol Group: 1,3-butanediol, 3-methyl-1,3-
Glycol ether solvents such as butanediol, 3-methyl-3-methoxybutanol, 3-methoxybutanol, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether and propylene glycol monopropyl ether.

Among the above stabilizers, the following compounds are preferable. Group: Alkyl ether sulfate ester salt represented by Chemical formula 5, for example, polyoxyethylene (p = 1) butyl ether sulfate ester sodium salt

[0019]

Embedded image R ₂ O (C ₂ H ₄ O) mSO ₃ Na (R ₂ : C _{2 to} C ₆ alkyl group m: 1 to 2)

Group: ethanol Group: propylene glycol Group: 3-methyl-3-methoxybutanol, 3-methoxybutanol, 3-methyl-1,3-butanediol

The above components are balanced with water to give a strong alkaline liquid detergent composition. In the present invention, in addition to the above-mentioned essential components, it is possible to mix pigments, fragrances and the like as optional components.

[0022]

EFFECTS OF THE INVENTION According to the present invention, a strong alkaline liquid detergent composition is prepared by mixing caustic soda and / or potassium hydroxide with a surfactant, a chelating agent and a specific stabilizer to stabilize the cleaning ingredients. By blending it, it is possible to obtain excellent cleaning performance.

[0023]

EXAMPLE A strong alkaline liquid detergent composition having each composition shown in Tables 1 to 4 was prepared, and the stability of the composition was measured by the following method.
The cleaning performance was evaluated, and the results are shown in Tables 1 to 4.

(1) Liquid stability 100 ml of each prepared strong alkaline liquid detergent composition was
The appearance when placed in a 100 ml vinyl chloride container with an inner diameter of 40 mm and a height of 80 mm and stored under predetermined conditions for 1 week
Visually judge. The judgment criteria are as follows. ◯: Not separated or solidified (stable) Δ: Slightly separated or clouded ×: Separated or solidified

(2) Cleaning performance 2 stainless steel plates are installed in the kitchen of the dining room where oil smoke is scattered.
After leaving it for 0 days, select the part where oil stains are attached as evenly as possible and use it as a dirt plate. A 10% tap water strong alkaline liquid detergent solution is applied to the soiled plate, and the cotton knitted fabric is reciprocated 10 times by applying a load of 500 g, and the removed state of the soil is visually judged according to the following criteria. ◎: Very good dirt removal ○: Good dirt removal △: Uneven dirt removal ×: Almost no dirt removal

[0026]

[Table 1]Invention product Sample No. 1 2 3 4 5 6 7 8 Composition (wt%): Component a: caustic soda-30 35 35 33 15 37 26 Caustic potassium 25 − − − − 13 − − b component: C₁₄α-Olefin sulfonic acid soda-1.2 0.5 0.3-0.8 0.1 0.7 Nonyldiphenyl ether ----- 0.3 --- Sodium sulfonic acid 2 soda C₁₂Sodium alkylbenzene sulfonate 0.5 − − − − 0.2 − − Polyoxyethylene (p = 20) − − − − − − − − Nonyl phenyl ether Component c: Ethylenediaminetetraacetic acid 4 soda 2 2 − − − − − − Citric acid 3 soda − − 3 1.5 3.2 − 1 − Polyacrylic acid soda (MW.2,500) − − − − − 1.2 − − Polyacrylic acid soda ( MW.70,000) − − − − − − − − Isoamylene-maleic anhydride − − − − − − − 1.5 Acid soda copolymer (MW.8,000) Component d: ethanol 3 2 2 2 1 2 3 1.7 ethylene glycol − − − − − − − − propylene glycol 10 9 9 9 3.5 8 3 12 3-methyl-3-methoxybutanol 4 4 − 2 − − − − 3- Methyl-1,3-butanediol − − 42 − 5 − − 3-methoxybutanol − − − − − − − 5 Polyoxyethylene (p = 1) − 0.8 1.5 1.5 0.5 − 0.7 − Butyl ether sulfate ester soda Sodium toluene sulfonate − − − − − − − − Ion-exchanged water balance

[0027]

[Table 2]Invention product Sample No. 1 2 3 4 5 6 7 8 Performance: 45 ℃ ○ ○ ○ ○ ○ ○ ○ ○ Liquid stability 25 ℃ ○ ○ ○ ○ ○ ○ ○ ○ 5 ℃ ○ ○ ○ ○ ○ ○ ○ ○ Cleaning performance ○ ◎ ◎ ◎ ○ ○ ○ ○ ○

[0028]

[Table 3] Comparative Example Sample No. 9 10 11 12 13 14 15 Composition (wt%): a component: caustic soda 30 26 35 15 37 --- caustic potassium --- 13-28- b component: C ₁₄ α-olefin sulfone Acid soda 1.2 − 1 − − − 3 Nonyldiphenyl ether − − − − 0.3 − − Sulfonic acid 2 soda C ₁₂ Alkylbenzene sulfonic acid sodium salt − − − − − 0.9 − Polyoxyethylene (p = 20) − − − 3 − − 5 Nonyl phenyl ether c component: Ethylenediaminetetraacetic acid 4 soda 2-3 − − − − 3 Sodium citric acid − 5 − − − 3 − − Sodium polyacrylate (MW.2,500) − − − − − − − Sodium polyacrylate ( MW.70,000) − − − − − 3-Isoamylene-maleic anhydride − − − − − − − Acid sodium copolymer (MW.8,000) d component: ethanol − − − − 1 − 5 ethylene glycol 15 − − − − − 3 Pro Pyrene glycol − − 10 8 3 − 2 3-Methyl-3-methoxybutanol − − − 4 − − − 3-Methyl-1,3-butanediol − − − − − − − 3-Methoxybutanol − − − − − − − Polyoxyethylene (p = 1) − − − − − 0.5 − − Butyl ether sulfuric acid ester soda Sodium toluene sulfonate − − 3 − − − − Ion exchange water balance

[0029]

[Table 4] Comparative Example Sample No. 9 10 11 12 13 14 15 Performance: 45 ° C × ○ × × ○ × × Liquid stability 25 ° C × ○ × × ○ × ○ 5 ° C × ○ × × × × ○ Cleaning performance ○ △ ○ △ ○ △ ×

Example 2 Inventive sample No. 1 in Table 1 of Example 1 When No. 2 was used to wash the floor, walls, smokehouse interior walls, smoke racks, etc. in the ham factory, the attached dirt was easily removed.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display area C11D 7:34 7:26 7:32)

Claims (4)

[Claims] 1. (a) Caustic soda and / or potassium hydroxide: 25% by weight or more (b) Surfactant containing at least one anionic surfactant: 0.1-5% by weight (c) Hydroxycarboxylic acid A chelating agent selected from aminocarboxylic acids or salts thereof or water-soluble polymers: 0.1 to 10% by weight (d) Alkyl ether sulfate ester salt of the following chemical formula 1, alcohol, polyhydric alcohol and glycol ether solvent Two or more stabilizers selected from at least two groups out of four groups: 5 to 30% by weight R ₁ O (C ₂ H ₄ O) nSO ₃ M (R ₁ : C _{1 to} C ₈ straight or branched alkyl group n: 0 to 4 M: containing sodium, potassium, ammonium, monoethanolamine, diethanolamine or triethanolamine salt) Strong alkaline liquid detergent composition characterized and. 2. The strong alkaline liquid detergent composition according to claim 1, which contains a sulfonate type and / or a sulfate ester type as the anionic surfactant of the component (b). 3. The component (a) is caustic soda of 30 to 40.
The strong alkaline liquid detergent composition according to claim 1 or 2, which is blended in a weight percentage. 4. The stabilizer of the component (d) is represented by the following chemical formula 2.
Alkyl ether sulfate ester salts of 3-methyl-methoxybutanol, 3-methoxybutanol and 3-
3. A combination of three or more selected from at least three groups selected from the four groups consisting of methyl-1,3 butanediol, propylene glycol and ethanol.
The strong alkaline liquid detergent composition according to any one of items 1 to 3. Embedded image R ₂ O (C ₂ H ₄ O) mSO ₃ Na (R ₂ : C _{2 to} C ₆ alkyl group m: 1 to 2)