JPH0668115B2 - Cleaning composition - Google Patents

Description

The present invention relates to a detergent composition containing a nonionic surfactant and a specific dialkylamine oxide, which has excellent penetrating power and extremely good detergency. Is.

[Prior Art] The basic properties of a surfactant include an emulsifying action, a solubilizing action, a dispersing action, a foaming action, a penetrating action, and the like.
When a surfactant is used as one component of the detergent, it is considered that detergency is expressed as a total effect of these actions.

Among these actions, the permeation action is considered to facilitate the wetting of the fibers with the washing liquid when washing the fibers and the like, and facilitate the action of the washing component on the dirt attached between the fibers. In addition, when cleaning hard surfaces such as tableware and cooking utensils, it is thought that not only does it improve the wettability of the object to be cleaned and makes it easier to remove oily dirt, but also prevents dirt from reattaching to the object to be cleaned. To be

[Problems to be Solved by the Invention]

As a surfactant having a strong penetrating action, sulfosuccinic acid-
Di-2-ethylhexyl ester sodium salt (trade name: Aerosol OT) is famous, but since this sulfosuccinic acid-di-2-ethylhexyl ester sodium salt is an anionic surfactant, the effect of the hardness component in the water used is affected. It is vulnerable to susceptibility, and forms highly insoluble Ca salts and Mg salts in water of high hardness, so it cannot exert a strong penetrating action. Further, since it has an ester bond in the molecule, it has a problem of poor alkali resistance, and it may be decomposed when used in combination with an alkali builder usually used for heavy-duty detergents for clothes. Further, when it is used as a liquid detergent such as a dishwashing detergent, it has a drawback that it is difficult to obtain a high-concentration liquid composition because it has low solubility in water and easily forms liquid crystals. For this reason, although it can be expected that a strong penetrating action contributes to the detergency, it cannot be used as a washing base.

[Means for Solving the Problems]

Under such circumstances, the present inventors have earnestly studied to develop a cleaning base having excellent penetrability, and as a result, a specific alkylamine oxide has strong penetration comparable to that of sulfosuccinic acid-di-2-ethylhexyl ester sodium salt. It has been found that it has strength and exerts good detergency in combination with a specific nonionic surfactant, and completed the present invention.

That is, the present invention comprises (a) a nonionic surfactant, (b) a dialkylamine oxide represented by the following general formula (I), and a (a) / (b) weight ratio of 0.01 to 10:
The present invention provides a detergent composition characterized by being 0.

(In the formula, R ₁ and R ₂ each represent an alkyl group or an alkenyl group having 6 to 18 carbon atoms, and R ₃ is —CH ₂ CH ₂ —, —CH ₂ CH (CH
₃ )-, -CH ₂ CH ₂ CH _2- , or a mixture thereof, R
₄ represents an alkyl group having 1 to ₄ carbon atoms, a hydroxyalkyl group, a benzyl group, or a hydrogen atom, n is 1 to 20,
It preferably represents a number of 2 to 10, particularly preferably 2 to 5. ) As the nonionic surfactant of the component (a) used in the present invention, any one may be used as long as it has good compatibility with the component (b) and economical efficiency, and is not particularly limited. is not. Suitable examples of the component (a) are shown below.

(1) A polyoxyalkylene alkyl phenyl ether represented by the general formula (II).

In the formula, R ₅ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, R ₃ is the same as in the general formula (I), and m represents a number of 3 to 40.

(2) A polyoxyalkylene alkyl ether represented by the general formula (III).

R ₆ O (R ₃ O) mH (III) In the formula, R ₆ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, R ₃ is the same as in the general formula (I), and m is 3 to 40. Represents a number.

(3) A higher fatty acid alkanolamide represented by the general formula (IV) or (V).

In the formula, R ₇ represents an alkyl group or an alkenyl group having ₇ to 23 carbon atoms.

(4) An alkyl glycoside represented by the general formula (VI).

R ₈ (OR ₉ ) xGy (VI) In the formula, R ₈ represents a linear or branched alkyl group having 8 to 18 carbon atoms, an alkenyl group or an alkylphenyl group, and R ₉
Represents an alkylene group having 2 to 4 carbon atoms, and G represents 5 to 5 carbon atoms.
It is a residue derived from a reducing sugar having 6. The average value of x is 0 to 5, preferably 0 to 2, and the average value of y is 1 to 10, preferably 1.1 to 3. Examples of the reducing sugar having 5 to 6 carbon atoms include glucose, galactose, xylose, mannose, lyxose, arabinose, maltose, xylobiose, isomaltose, cellobiose, gentibiose, lactose, sucrose, nigerose, turanose, raffinose, gentianose,
Examples include melezitose.

(5) The molecular weight of polypropylene glycol is 1000-40
A polypropylene glycol / polyethylene oxide adduct in which the average addition mole number of polyethylene oxide is 10 to 60 at 00.

The dialkylamine oxide of the component (b) used in the present invention has a high penetrating power by itself, but has low solubility in water, and cannot be said to have sufficient detergency alone.
In order to improve the solubility, the (a) / (b) weight ratio needs to be 0.01 or more. Dialkylamine oxide exhibits a strong penetrating action and improves detergency even if a small amount of a detergent composition containing the component (a) as a main component is contained.
If the (a) / (b) weight ratio exceeds 100, the effect is remarkably reduced, which is not preferable. Therefore, the (a) / (b) weight ratio must be within the range of 0.001 to 100, preferably within the range of 0.1 to 10.

The detergent composition of the present invention may be in the form of liquid, paste, solid, powder or the like, but it is preferably liquid or powder in terms of ease of use.

The cleaning composition of the present invention is mainly used for cleaning tableware, cooking utensils, etc. and cleaning clothes.
It can be applied to a cleaning agent around the floor, wall, window glass, furniture, toilet, etc., and its use is not particularly limited.

In addition to the above-mentioned essential components, the cleaning composition of the present invention may contain various components as necessary within a range that does not impair the intended performance. For example, a linear alkylbenzene sulfone may be used as a surfactant. Anionic surfactants such as acid salts, polyoxyethylene alkyl ether sulfates, alkyl sulfates, α-olefin sulfonates, alkane sulfonates, α-sulfo fatty acid esters; amphoteric surfactants such as betaine and sulfobetaine Agents.

Further, as the solubilizer used in the liquid detergent, lower alcohols such as ethanol and isopropanol; ethylene glycol, propylene glycol, glycerin,
Polyhydric alcohols such as sorbitol; aromatic sulfonates such as p-toluene sulfonate and m-xylene sulfonate. Further, as a builder, a water softener such as sodium sulfate, condensed phosphate, synthetic zeolite, ethylenediaminetetraacetic acid (EDTA), and nitrilotriacetic acid (NTA); inorganic materials such as silicate, carbonate, caustic soda, and ethanolamine Organic alkaline agents; anti-redeposition agents such as carboxymethyl cellulose, polyethylene glycol and the like.

In addition, enzymes, abrasives, fluorescent dyes, colorants, preservatives,
Fragrances and the like can be added according to the purpose.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Various compositions shown in Table 1 were prepared, and their penetrating power and detergency were examined by the following methods.

<Penetration test (1)> Preparation of test piece: A model soil prepared by mixing beef tallow rapeseed oil in a weight ratio of 9/1 was heated to a temperature above its melting point (about 50 ° C), and a stainless steel plate (15 cm) was used using a bar coder. X 20 cm) was evenly applied.
At this time, the thickness of the model stain on the coated surface is 25 ℃ on the plate.
It was cooled down to 20 ± 3 μm with the oil solidified.

Connect the oscilloscope to the test piece prepared as described above as shown in Fig. 1, and add 0.05 ml of the washing solution to the part 3 in Fig. 1 so that the washing solution penetrates the oil layer and reaches the stainless plate. The time until was measured under the following conditions.

Measurement conditions Washing concentration: 0.15% by weight Hardness of water used: 4 ° DH Temperature: 25 ° C <Washing power test (1)> JIS K3370-1979 4.9 “Testing method for washing power of synthetic detergent for kitchen”
In accordance with the above, the measurement was performed under the following conditions.

Measurement conditions Detergent concentration: 0.15% by weight Hardness of water used: 4 ° DH Temperature: 25 ° C Washing time: 10 minutes Model soil composition: beef tallow / rapeseed oil = 9/1 (weight ratio) Judgment of washing power: before and after washing The cleaning rate was calculated from the weight change of the object to be cleaned (slide glass).

The results are shown in Table-1.

Example 2 The compositions shown in Table 2 were prepared, and the penetrating power and detergency of each were examined by the following methods.

The results are shown in Table-4.

As the dialkylamine oxide, those in which R _{1 to} R ₄ and n of the compound represented by the general formula (I) are shown in Table 4 were used.

<Penetration test (2)> Put 100 ml of detergent solution into a 100 ml beaker and put it on the water surface.
Gently float a 2 cm x 2 cm unscoured dry felt,
The time required for the felt to settle to the bottom of the beaker was measured under the following conditions.

Measurement conditions Detergent concentration: 0.15% by weight Hardness of water used: 4 ° DH Temperature: 25 ° C <Detergency test (2)> 10 cm x 10 cm where detergent solution 1 is coated with artificial dirt of the composition shown in Table-3. Put 12 artificially contaminated cloths and the bath ratio is 1/60
Then, a non-contaminated cloth of the same size was further added, and the cloth was washed with a tergotometer at 100 rpm under the following conditions.

Measurement conditions Detergent concentration: 0.15% by weight Hardness of water used: 4 ° DH Temperature: 25 ° C Cleaning time: 10 minutes Rinse: 4 ° DH in hard water for 5 minutes Composition of artificial soil on artificial soil: Judgment of detergency: Detergency was measured by measuring the reflectance of the original cloth before contamination (mixing carbon black as an indicator by an ordinary method) and the contaminated cloth before and after washing with a self-recording colorimeter (manufactured by Shimadzu Corporation) according to the following formula. The cleaning rate was calculated. Table 4 shows the measured average values of 12 pieces of contaminated cloth.

Example 3 A detergent (A) (comparative product) and a detergent (B) (invention product) shown in Table 5 were prepared, and their penetrating power and detergency were examined. The osmotic force was evaluated in the same manner as in the osmotic force test (2).
The results are shown in Table-5.

<Detergency test (3)> Preparation of contaminated cloth: A white cloth of cotton / tetoron blend was cut into 9 cm x 30 cm, sewn on a collar of a shirt, and worn by an adult boy for 3 days.
After wearing, the contaminated cloth was left in a room at 25 ° C. and 65% RH for 1 month. After leaving it, a cloth having the same degree of stain and having a symmetrical stain with respect to the center line was selected, half-cut at the symmetry point of the stain and subjected to the measurement.

Washing of contaminated cloth: 15 contaminated cloths prepared as above are set as a set, and 50
Sew on a cotton cloth of 50 cm x 50 cm, apply 45 ml of the cleaning composition for evaluation evenly to the contaminated cloth, leave it for 10 minutes, make up 1 kg including cotton underwear, and transfer to Toshiba washing machine "Galaxy" Then, tap water was added to adjust the total amount to 30, water was washed at a water temperature of 25 ° C. for 10 minutes with strong inversion, and after 5 minutes of rinsing with water, the resultant was dried and then used for judgment of detergency.

Judgment of Detergency: Judgment of detergency was evaluated by visually comparing a semi-cut cloth washed with two kinds of detergents (A) and (B) with the naked eye. The evaluation was carried out on the basis of a standard soiled cloth having a rank of 10 which represents the degree of soiling.

The detergency was represented by the detergency score (detergency index) of the detergent (B) when the detergency of the detergent (A) was 100. The score difference is 0.
A difference of 5 or more can be regarded as a significant difference.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an apparatus used for an osmotic force test in Example 1. 1: Stainless steel plate 2: Beef tallow-rapeseed oil coating film 3: Test solution drop 4: Electrode 5: Oscilloscope

Claims (2)

[Claims] 1. A nonionic surfactant (a), (b) a dialkylamine oxide represented by the following general formula (I), and a weight ratio of the component (a) and the component (b) ( A) / (b) is 0.01-100, The cleaning composition characterized by the above-mentioned. (In the formula, R ₁ and R ₂ each represent an alkyl group or an alkenyl group having 6 to 18 carbon atoms, and R ₃ is —CH ₂ CH ₂ —, —CH ₂ CH (CH
₃ )-, -CH ₂ CH ₂ CH _2- , or a mixture thereof, R
₄ represents an alkyl group having 1 to ₄ carbon atoms, a hydroxyalkyl group, a benzyl group, or a hydrogen atom, and n represents a number of 1 to 20. ) 2. The (a) nonionic surfactant is selected from the group consisting of polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, higher fatty acid alkanolamides, alkyl glycosides and polypropylene glycol / polyethylene oxide adducts. The cleaning composition according to claim 1, which is one kind or two or more kinds.