JPH10279996A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition exhibiting excellent cleaning power under a low-temperature washing condition owing to the quick swelling of oily stain such as sebum by compounding a surfactant having a high permeability to fatty acid and a chelating agent having a Ca<2+> -chelate stability number of not smaller than a specific level. SOLUTION: This composition contains (A) preferably 8-50 wt.% of a surfactant having a fatty acid permeability of >=0.13 and an HLB value of >=11 and (B) preferably 10-35 wt.% of a chelating agent having a Ca<2+> -chelate stability number of >=6. The component A is preferably a nonionic surfactant of the formula I (R1 is a 7-19C straight or branched chain alkyl or alkenyl; R2 is H or a 1-3C alkyl; R, and R4 are each a 1-3C alkyl or alkenyl; (n) is 1-5), etc. The component B is e.g. a chelating agent of the formula II (M is a counter ion). The objective composition is preferably incorporated with a crystalline silicate, an aluminosilicate, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning composition, and more particularly, to a cleaning composition having excellent sebum dirt cleaning power.

[0002]

2. Description of the Related Art Detergents for clothing are used for solubilizing dirt, for dissolving and dispersing dirt into washing liquid from fibers, for dispersing dirt and solubilizing (emulsifying) an alkali agent and for dispersing dirt. And a metal-sequestering agent for removing calcium, magnesium, etc. from the washing liquid, which lower the ability of the surfactant. Among these components, substances which do not exhibit cleaning performance by themselves, but are intended to improve the detergency by combining with a surfactant are generally referred to as detergent builders or simply builders. Builders are extremely important substances for more effectively expressing the performance of surfactants.

[0003] Surfactants also play a major role in removing dirt from fibers as described above. Surfactants used in detergents are broadly classified into those mainly having an anionic property and those mainly having a nonionic property. Surfactants used in anionic-based ones include alkylbenzene sulfonates having 10 to 16 carbon atoms, sulfates of higher alcohols having 10 to 18 carbon atoms, α-olefin sulfonates, α-sulfonates. Higher fatty acid ester salts, alkane sulfonates (SAS), and the like, and surfactants mainly used for nonionics include polyoxyethylene alkyl ethers and polyoxyethylene alkyl phenyl ethers. As examples of these, for example, Japanese Patent Publication No. 64-10039, Japanese Patent Publication No. 4-43119, Japanese Patent Publication No. 5-66440,
JP-A-4-339898, JP-A-5-5100, JP-A-6-9999,
JP-A-6-10000 and the like.

[0004] Detergent builders can be broadly classified into metal ion (hardness component) sequestering agents, alkali agents, and dispersants. Among them, the sequestering agent is a substance for more effectively expressing the performance of the surfactant, and is extremely important.

[0005] In the past, phosphorus compounds such as sodium tripolyphosphate were blended as detergents for clothes as sequestering agents. However, phosphorus compounds are considered as one of the causes of eutrophication in lakes and swamps. The detergent industry has been developing phosphate builder-free detergents. At present, crystalline sodium aluminosilicate having a specific structure (referred to as zeolite in the art) has no problems in phosphate-type builders and has been stable in price in recent years. It is the main component of the agent.

As a sequestering agent, a crystalline silicate may be used in addition to the above-mentioned zeolite. For example, JP-A-60-227895 discloses that a crystalline silicate is used as a water softener,
JP-A-2-178398, JP-A-7-53992 and the like, a detergent composition containing a crystalline silicate, further JP-A-5-184946
JP-A-6-116588 discloses a specific crystalline silicate and a detergent composition containing the same.

However, since builder such as zeolite and crystalline silicate is a kind of ion exchanger, there is a problem that the blocking of the hardness component is not sufficient under low-temperature washing conditions. Since the late 1980s, clothing detergents have undergone a transformation in form, and so-called compact detergents, which have a high bulk density and a small capacity when used, have become mainstream. However, since the detergent particles of the compact detergent are more compact than conventional detergent particles, solubility becomes a problem. Zeolite, which is the main component of the builder, is insoluble in water, and crystalline silicic acid is also poorly soluble in water, so that it may cause further generation of water-insoluble substances during washing with a compact detergent. With respect to this problem, the present applicant has attempted to solve the problem by making various efforts in the composition and manufacturing method of the compact detergent. Excellent detergent builders are still being developed.

Further, as a water-insoluble detergent builder,
Organic builders such as polycarboxylates are also known.
Specifically, citrate, malate, nitrilotriacetate (NTA), ethylenediaminetetraacetate (EDTA), a polymer of a vinyl compound having a carboxyl group, for example, polyacrylic acid having a molecular weight in an oligomer region And salts of acrylic acid / maleic acid copolymers. But,
These are concerned with some drawbacks such as insufficient sequestering ability of the metal ion, indication of fish toxicity, and poor biodegradability.

[0009]

In general, dirt adhering to clothes, especially oily dirt derived from human secretions or foods, can be swollen or melted at a higher washing temperature, and can be easily removed with a detergent. Becomes Therefore, when washing, it is advantageous to use warm water in terms of the cleaning effect, but energy is required to obtain warm water, and from a global perspective, the impact of energy consumption on the environment Is concerned. Therefore, studies are being conducted in the direction of washing without increasing the washing temperature. However, when washing is performed at a low temperature, washing of oily stains is particularly disadvantageous for the above-described reasons. In addition, since the detergent also becomes difficult to dissolve, it is common that the overall detergency decreases. On the other hand, washing conditions in Japan are very special, and it is not uncommon for winter washing to use water at a low temperature of about 5 ° C. In view of the above, there has been a demand for the development of a detergent composition having excellent oily soil detergency even under low-temperature washing conditions.

[0010]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the problems, and as a result, have found that a surfactant having a high permeability to fatty acids, that is, a fatty acid permeability coefficient of 0.13 or more and an HLB
By mixing a surfactant having a characteristic value of 11 or more with a chelating agent having a chelate stability constant of 6 or more with Ca ²⁺ , oily dirt such as sebum swells quickly and oily dirt detergency at low temperatures Was found to be significantly improved, and the present invention was completed.

That is, the present invention relates to (a) a fatty acid permeability coefficient of 0.13
The present invention provides a detergent composition containing a surfactant having an HLB of 11 or more and a chelating agent having a chelate stability constant of 6 or more with (b) Ca ²⁺ . Hereinafter, the present invention will be described.

In ordinary washing, stains around the lip and dark stains on socks are representative of stains that are difficult to remove. In order to remove these stains more efficiently, it is important to effectively remove the sebum component serving as a binder between the coloring component and the fiber in the stain. As a method for efficiently removing sebum by washing, a surfactant formulation that reduces the interfacial tension at the oil-water interface has been proposed. But,
Under low-temperature washing conditions, sebum is semi-solid, so the emulsification promoting effect expected by lowering the interfacial tension is not so large, and the HLB of the cosurfactant blended to lower the interfacial tension is relatively low. In addition, there is a problem that the re-contamination prevention property of the synthetic textile is reduced.
The present inventors have conducted intensive research to develop a detergent having excellent sebum detergency even at a low temperature, and as a result, by incorporating a surfactant having a property of forming a complex with a fatty acid, sebum dirt is quickly swollen even at a low temperature. And found that it could be removed efficiently. However, in an actual washing system, hardness components such as Ca ²⁺ contained in the washing water combine with free fatty acids in sebum to form an insoluble salt outside the sebum stain, thereby inhibiting the formation of a complex. In addition, a phenomenon in which the swelling of sebum was suppressed was found. Therefore, a result of various studies, Ca ²⁺ chelating stability constant of 6 or more, preferably Ca ²⁺ from fatty acids Ca salt insolubilized by combining 6.5 or more chelating agents
It was revealed that the swelling effect of sebum can be efficiently promoted by the addition of a surfactant having a strong property of forming a complex with a fatty acid even in an actual laundry system. In addition, it was revealed that by adding a chelating agent having a high Ca ²⁺ chelate stability constant, the hardness component deposited on the clothes was also removed, so that the detergency was synergistically improved. That is, the present invention relates to a surfactant having a high property of quickly penetrating fatty acids and forming a complex.
By using a chelating agent having a Ca ²⁺ chelate stability constant in combination, it is possible to provide a detergent composition having excellent sebum soil detergency even in actual home laundry.

[0013] The surfactant used in the detergent composition of the present invention must have a fatty acid permeability coefficient of 0.13 or more as defined herein. With an osmotic force of less than 0.13, a sufficient sebum swelling effect cannot be obtained. Such a surfactant (a) is,
It is preferable that 3% by weight or more be blended in the cleaning composition of the present invention. It is more preferably at least 8% by weight. If it is less than 3% by weight, a sufficient effect cannot be expected. Surfactant (a) is present in the composition of the present invention in an amount of 3 to 50% by weight, especially 8 to 50% by weight.
It is preferred to be blended.

The fatty acid permeation coefficient defined as the property of the surfactant in the present invention refers to a value calculated by the following method.

<Calculation Method of Fatty Acid Permeability Coefficient> 5 parts by weight of a surfactant, 45 parts by weight of oleic acid and 45 parts by weight of ion-exchanged water are placed in a separating funnel and shaken (Tayo Kagaku Kogyo KK, 1 hour on reciprocating shaker SR-II)
Shake vigorously. In order to collect the oil phase from the emulsified mixture, centrifugation was performed at about 30,000 G (18000 rpm, rotor No. 7) for 5 hours using a high-speed cooling centrifuge CR 20B2 manufactured by Hitachi Koki Co., Ltd. Take the oil phase of the supernatant and add chloroform-d (CDCl ₃ : 7.3 ppm) or acetone-d ₆ ((CD
₃ ) ₂ CO: 2.1ppm) to prepare a 3% by weight solution,
MS (Tetramethylsilane: 0.0ppm)
The NMR spectrum of this sample solution based on
^The measurement was performed at ¹ H and a frequency of 500 MHz. NMR analyzer is Varian i
UNITY INOVA 500 MHz spectrom from nstruments limited
eter was used. From the spectra, peaks that could be clearly assigned were selected for the oleic acid and surfactant samples, the area ratio of each peak was determined from the integration curve, and the ratio was converted to the component ratio of oleic acid and surfactant. It is desirable that characteristic peaks are well separated, but for overlapping peaks, the area ratio may be processed as the sum of the number of protons based on each component. When the area ratio is put into an integer ratio, an equivalent proton number ratio is obtained. The fatty acid permeability coefficient was calculated from the following equation. Fatty acid permeability coefficient = (S _SAA / N _SAA ) / (S _SAA / N _SAA + S _OIL / N _OIL ) S _SAA : Integrated value of peak attributable to surfactant S _OIL : Peak of peak attributable to oleic acid Integral value N _SAA : Number of protons attributable to surfactant N _OIL : Number of protons at peak attributable to oleic acid In general, the higher the fatty acid permeability coefficient in the present invention, the better the sebum detergency. However, even if the permeation coefficient becomes very high, the improvement of the detergency becomes less remarkable.

The HL of the component (a) blended in the present invention
B is 11 or more, preferably 12 or more. The method for measuring HLB in the present invention is described in “Journal of Colloid and Interfa
ce Science, Vol. 107. No. 1, September 1985 ”, according to the method of Kunieda et al.
_HLB ) and a method for measuring HLB based on the finding that the number of HLB by Griffin is in a linear relationship are described.

As the highly permeable surfactant, a nonionic surfactant is suitable. For example, a fatty acid amidoamine oxide type surfactant represented by the following general formula (I), (II) Fatty acid amide ether type surfactants represented by 1-3, surfactants represented by the general formula (III), surfactants represented by the following general formula (IV), and the like are preferable.

[0018]

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(Wherein R ₁ is a linear or branched alkyl or alkenyl group having 7 to 19 carbon atoms, R ₂ is H,
~ 3 alkyl or alkenyl groups, R ₃ and R ₄ have 1 carbon atom
3 to 3 alkyl or alkenyl groups, n is a number from 1 to 5. )

[0020]

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[0021]

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(Wherein, R ₁ represents a linear or branched alkyl or alkenyl group having 7 to 19 carbon atoms, and R ₂ represents H,
Linear or branched alkyl group or alkenyl group having 1 to 24 carbon _{atoms, C 2 H 4 O (AO} ) n H, C 3 H 6 (AO) n H, CH 2 CH (O (AO)
shows the _{n H) CH 3, CH 2} CH (O (AO) n H) a group represented by _{CH 2 O (AO) n H} . Here, AO represents ethylene oxide or propylene oxide, and n represents a number of 0 to 100. )

[0023]

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(Wherein, R ₁ represents a linear or branched alkyl or alkenyl group having 9 to 19 carbon atoms, and R ₂ represents H
Represents an alkyl group or alkenyl group having 1 to 3 carbon atoms,
O represents ethylene oxide or propylene oxide, n represents a number of 0 to 5, and m represents a number of 1 or 2. The chelating agent (b) used in the cleaning composition of the present invention comprises:
The chelate stability constant with Ca ²⁺ , the main component of the hardness component, is
Must be at least 6. A stability constant of 4 to 5 is sufficient to remove free Ca ²⁺ from the washing system by a chelating action, but at least 6, preferably at least 6, preferably 5 to remove Ca ²⁺ from insoluble fatty acid Ca salts. 6.5 or more. If the stability constant is less than 6, a sufficient Ca ²⁺ extraction effect cannot be obtained, and a rapid swelling action of sebum stain cannot be obtained. The chelate stability constant with Ca ²⁺ defined as the property of the chelating agent in the present invention means one obtained by the following method.

<Method of Measuring Stability Constant of Chelate with Ca ²⁺ > 0.1 mol / liter of NH ₄ Cl—NH ₄ OH (pH 10.0) as a buffer solution
Prepare solution. All sample solutions were prepared using this buffer. The Ca ²⁺ concentration was measured using an ion meter 920A manufactured by Orion Co., Ltd. and a Ca ²⁺ ion electrode. First, the relationship between the calcium chloride concentration and the potential of the electrode is determined, and a calibration curve is created. 5.36 × 10 ^-2 mol / l solution of calcium chloride, a 5.36 × 10 ^-4 mol / l solution of a chelating agent sample are prepared. 1 ml of calcium chloride solution is added to 100 ml of the chelating agent sample solution, and the mixture is stirred for 5 minutes. The remaining Ca ²⁺ concentration is measured using a Ca ²⁺ ion electrode. The chelating agent is Ca ²⁺
Assuming that a chelate complex is formed at a ratio of 1: 1, the Ca ²⁺ chelate stability constant is determined from the following equation.

[0026]

(Equation 1)

The chelating agent having a Ca ²⁺ chelate stability constant of 6 or more used in the present invention includes a compound represented by the following general formula (V).

[0028]

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Specific examples include compounds represented by formulas (VI) to (IX).

[0030]

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[0031]

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[0032]

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[0033]

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In the above, the counter ion M is H, Na, K, NH ₄
And the like. As a compound having a high Ca ²⁺ chelate stability constant, ethylenediaminetetraacetate (EDT
A) is well known. Although this compound can be used in terms of performance, it is not suitable for use as a detergent for clothing because of its biodegradability. All of the chelate compounds represented by the general formula (V) or the general formulas (VI) to (IX) have biodegradability, and can be used without any problem from the viewpoint of environmental suitability.

In the present invention, the specific chelating agent of the component (b) is preferably incorporated in an amount of 3 to 50% by weight, more preferably 10 to 35% by weight.

The surfactant (a) of the present invention has excellent permeability to fatty acids. Since fatty acids are hydrophobic, surfactants with low HLB values are usually considered for fatty acid stains. For example, as an example of a general nonionic surfactant, a surfactant obtained by adding less than 2 ethylene oxide to a linear alcohol having an alkyl chain of 12 to 14 carbon atoms has a low HLB value and a fatty acid. It can be cited as having excellent permeability. However, such a surfactant having a strong hydrophobicity hardly forms micelles in water when actually mixed as a detergent, and thus has a small contribution to the detergency. In particular, a decrease in detergency in washing using low-temperature water becomes remarkable. Therefore, the present inventors have conceived of using a surfactant having a high permeability to a fatty acid among surfactants having a high HLB value, and have found the component (a) of the present invention. However, it has been found that such surfactants tend to have reduced cleaning performance due to the presence of hardness components (such as calcium and magnesium) in the wash water. This is the reason why some surfactants in the component (a) have not been noticed so far even though they are known to be added to detergents.

The present inventors have conducted earnest studies from such a background. As a result, when used in combination with (a) of the present invention, the chelating agent of (b) of the present invention is most effective in improving low-temperature detergency. I found that it was a target. At first glance, this combination appears to enhance the cleaning effect due to the chelating ability of the chelating agent (b), but when used in combination with a component other than the component (a) of the present invention, improvement in cleaning power at low temperatures cannot be expected. That is, the present invention is achieved by using, as essential components, a surfactant (a) excellent in specific fatty acid permeability and having a high HLB value and a chelating agent (b) having a chelate stability constant equal to or higher than a specific value. Things.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In addition to the surfactant (a), the detergent composition of the present invention contains an anionic surfactant, a nonionic surfactant, and a cationic surfactant commonly used in detergents. An activator and an amphoteric surfactant can be used in combination. However, if the component (a) is not more than 20% by weight based on the total weight of the surfactant, the effect of removing sebum from the stain cannot be sufficiently exhibited. The total amount of surfactant is 10 in the detergent composition
The range is preferably from 50 to 50% by weight, and more preferably from 15 to 40% by weight. Ten
If the amount is less than 50% by weight, the detergency will be insufficient, and if it exceeds 50% by weight, the physical properties of the powder will be reduced.

As the anionic surfactants, those having 8 to 16 carbon atoms
Alkylbenzenesulfonic acid, alkanesulfonic acid (S
AS), α-olefin sulfonates, sulfates of primary and secondary higher alcohols, sulfates of polyoxyethylene alkyl ether, and α-sulfo fatty acid salts.

Examples of the nonionic surfactant include polyoxyethylene alkyl ether having 8 to 22 carbon atoms in the alkyl group, polyoxyethylene alkyl phenyl ether,
Higher fatty acid alkanolamides or alkylene oxide adducts thereof, sucrose fatty acid esters, alkyl and alkenyl glucosides, fatty acid glycerin monoesters or alkylene oxide adducts thereof, and alkylamine oxides can be used.

As the amphoteric surfactant, an amino acid type surfactant or an N-acylamino acid type surfactant can be used, and as the cationic surfactant, a quaternary ammonium salt or the like can be used.

The cleaning composition of the present invention may contain the following builder in addition to the chelating agent of the component (b).

<Crystalline silicate> In the present invention, it is particularly preferable to add a crystalline silicate. The crystalline silicate is preferably an alkali metal salt of silicic acid (SiO ₂ ), and the maximum pH value of the 0.1% dispersion is 11 or more (25 ° C.). It requires 5 ml or more to lower the pH to 10 using, and is excellent not only in alkalinity but also in alkaline buffering capacity. Among them, the alkali metal silicate SiO ₂ / M ₂ O (where M represents an alkali metal) is 0.5 to 2.6, preferably 1.5 to 2.2.
6 is preferably used. Crystalline silicates known in the art is a SiO ₂ / Na ₂ O is 1.9 to 4.0, but this ratio
Those exceeding 2.6 may not be suitable for the formulation of the high-density detergent which is the object of the present invention.

The crystalline silicate used in the present invention comprises:
As the ion exchange capacity of at least 100CaCO ₃ mg / g or more, preferably one having 200~600 CaCO ₃ mg / g, which is one of the substances having ion capturing ability in the present invention. The crystalline silicate has an average particle size of 0.1 to 10
0 μm, more preferably 1 to 60 μm
m. Here, the average particle size is the median size of the particle size distribution.

The crystalline silicate having such an average particle size and particle size distribution can be prepared by pulverization using a pulverizer such as a vibration mill, a hammer mill, a ball mill, a roller mill and the like.

The preferred crystalline silicate used in the present invention has the following composition. _{x (M 2 O) · y} (SiO 2) · z (Me m O n) · w (H 2 O) (X) wherein, M represents a Group Ia elements of the periodic table, Me represents the periodic One or a combination of two or more elements selected from the group IIa element, IIb element, IIIa element, IVa element or VIII element in the table is shown, y / x = 0.5-2.6, z / x = 0.01-0.9
, W = 0 to 20, n / m = 0.5 to 2.0. Me is a group IIa element, a group IIb element, a group IIIa element,
Selected from Group IVa or Group VIII elements, such as Mg, Ca,
Examples include Zn, Y, Ti, Zr, and Fe. These are not particularly limited, but are preferably Mg and Ca from the viewpoint of resources and safety. These may be used alone or as a mixture of two or more. For example, MgO, CaO,
_m O _n component may constitute.

In the general formula (X), y / x is 0.5 to 2.6
And preferably 1.5 to 2.6. y / x is 0.5
If it is less than 10, the water resistance is insufficient, and the caking property, solubility, and powder properties of the detergent composition are significantly adversely affected. On the other hand, when y / x exceeds 2.6, the alkaline capacity decreases,
It is insufficient as an alkali agent, and the ion exchange ability is low, and it is also insufficient as an ion exchanger. In the general formula (X), z / x is 0.01 to 0.9, preferably 0.02 to 0.5. When z / x is less than 0.01, the water resistance is insufficient, and when z / x exceeds 0.9, the ion exchange capacity is lowered and the ion exchange capacity is insufficient. x, y,
z is not particularly limited as long as it has the relationship shown in the y / x ratio and z / x ratio described above. As described above, when x (M ₂ O) becomes, for example, x ′ (Na ₂ O) × ″ (K ₂ O), x
Becomes x '+ x''. This relationship is the same in the z in the case where z (Me _m O _n) component consists of two or more. N / m indicates the number of oxygen ions coordinated to the element, and is substantially selected from the values of 0.5, 1.0, 1.5, and 2.0.

The production method of the crystalline silicate represented by the general formula (X) can be referred to JP-A-7-89712.

Further, a crystalline silicate having the following composition can also be preferably used. M ₂ O · x ′ (SiO ₂ ) · y ′ (H ₂ O) (XI) wherein M represents an alkali metal, x ′ = 1.5 to 2.6, y ′
= 0 to 20 (particularly preferably substantially 0). ].

In the general formula (XI), M is Ia in the periodic table.
Group Ia elements are selected from the group Ia elements, such as Na and K. These may be used alone or, for example, a mixture of Na ₂ O and K ₂ O to constitute the M ₂ O component. X 'and y' are 1.7 ≦
It is preferable that x ′ ≦ 2.2 and y ′ = 0, and one having a cation exchange capacity of 100 to 400 CaCO ₃ mg / g is one of the substances having an ion-capturing ability in the present invention.

The crystalline silicate represented by the general formula (XI) is
JP-A-60-227895 describes its production method,
Generally, amorphous glassy sodium silicate is 200 ~ 1000 ℃
And crystallized by firing. Details of the synthesis method are described in, for example, Phys. Chem. Glasses. 7, p127-p138 (196
6), Z. Kristallogr., 129, p 396-p404 (1969). The crystalline silicate represented by the general formula (XI) can be obtained, for example, from Hoechst under the trade name “Na-SKS-6” (δ-
Powders and granules can be obtained as Na ₂ Si ₂ O ₅ ).

In the present invention, the crystalline silicate represented by the general formula (X) and the crystalline silicate represented by the general formula (XI) may be used alone or in combination of two or more.

<Aluminosilicate> Aluminosilicate can be roughly classified into a crystalline one and an amorphous one, and any of them can be used in the present invention.

The crystalline aluminosilicate is generally called zeolite, is represented by the chemical formula (α), and particularly preferably is represented by the chemical formula (β).

A ′ (M ₂ O) · Al ₂ O ₃ · b ′ (SiO ₂ ) · w (H ₂ O) (α) (where M is an alkali metal atom, and a ′, b ′ and w are Represents the molar ratio of each component, generally 0.7 ≦ a ′ ≦ 1.5, 0.8 ≦ b ′ ≦
6, w is any positive number. Na ₂ O.Al ₂ O ₃ .n (SiO ₂ ) .w (H ₂ O) (β) (where n represents 1.8 to 3.0 and w represents a number of 1 to 6) As crystalline aluminosilicate (zeolite),
Synthetic zeolites having an average primary particle size of 0.1 to 10 μm typified by A-type, X-type and P-type zeolites are preferably used. The zeolite may be blended as zeolite agglomerated dry particles obtained by drying the powder and / or the zeolite slurry.

Further, as the amorphous aluminosilicate, those containing 30% by weight or more, preferably 40% by weight or more of silicon as SiO ₂ are good, and the pH of the 5% dispersion is 9 or more. The use of this further improves the deterioration of solubility in war after storage at high humidity.

Examples of the amorphous aluminosilicate used in the present invention include those represented by the following general formula (γ).
These have high oil absorption and high cation exchange capacity. a (M ₂ O) · Al ₂ O ₃ · b (SiO ₂ ) · c (H ₂ O) (γ) In the present invention, the ion exchange capacity is 100 CaCO ₃ mg / g or more,
It is preferable to use an amorphous aluminosilicate of 200 ml / 100 g or more. Such an amorphous aluminosilicate is preferable because it has an ion exchange water capacity and an action as an oil absorbing carrier.

In order to improve the hygroscopicity of a chelating agent such as an aminopolycarboxylic acid compound, to suppress the generation of water-insoluble components, and to improve the caking properties during storage of a detergent, zeolite or amorphous aluminosilicate is used. The formulation is effective. Especially,
The surface of the detergent particles containing the arnopolycarboxylic acid compound is preferably coated with these zeolites or amorphous zeolites. In particular, when the detergent particles are coated with an amorphous aluminosilicate having an oil-absorbing ability, suitable results can be obtained with a small amount. For use in these coatings, it is preferred that the aluminosilicate is incorporated in an amount of 1% by weight or more. Therefore, in order to satisfy the requirements of solubility and caking property or water-insoluble content of the detergent, zeolite or amorphous aluminosilicate is preferably incorporated in the detergent in an amount of 1 to 60% by weight, particularly 5 to 40% by weight. . Further, it is preferably 5 to 30% by weight.

<Polymer-based builder> The builder has an effect of dispersing the solid particle soil from the clothing into the washing bath and an effect of preventing the particles from reattaching (recontaminating) to the clothing. For this purpose, those having a weight-average molecular weight of 1,000 to 150,000, preferably 10,000 to 100,000 containing monoethylenically unsaturated mono- and dicarboxylic acid units are used, and preferably have a repeating unit represented by the following formula (co). It is a polymer salt.

[0060]

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(Wherein, M is a counter ion, copolymerization ratio x / y: 0/10 to 5/5 in molar ratio) This high molecular weight copolymer salt comprises (i) maleic acid and (ii) acrylic acid And (i) / (ii) = 0/10 to 5/5, preferably on a molar ratio basis, preferably
Sodium salt of acrylic acid homopolymer or maleic acid / acrylic acid copolymer copolymerized in a ratio of 2/8 to 5/5,
Consisting of potassium salt, weight average molecular weight 1,000-150,00
0, preferably in the range of 10,000 to 100,000. If the copolymerization ratio and the molecular weight deviate from the above ranges, satisfactory cleaning performance cannot be obtained. Such polymeric builders are present in the composition
It is preferable that the content is 0.5 to 10% by weight.

<Alkali agent> As the alkali agent, it is preferable to mix a conventionally known alkali agent. Examples of the alkaline agent include alkali metal carbonates such as sodium carbonate, which are collectively referred to as dense ash and light ash, and JIS.
No. 1, No. 2, and No. 3 amorphous alkali metal silicates. These inorganic alkaline agents are effective in forming the skeleton of particles when the detergent is dried, and can provide a relatively hard detergent having excellent fluidity. Other alkalis include sodium sesquicarbonate and sodium hydrogen carbonate, and phosphates such as tripolyphosphate also have an action as an alkali agent.

<Bleaching Agent and Bleaching Activator> Examples of the bleaching agent include sodium percarbonate, sodium perborate (preferably monohydrate), and sodium hydrogen peroxide adduct. It is preferable to coat with sodium borate. For details, reference can be made to US Patent Publication No. 4526698. Examples of the bleach activator include tetraacetylethylenediamine, acetoxybenzenesulfonate, JP-A-59-22999, JP-A-63-258447 and JP-A-6-316700.
And a metal catalyst in which an organic peracid precursor or a transition metal described in Japanese Patent Application Laid-Open No. H11-25864 is stabilized with a sequestering agent. The bleaching agent and the bleaching activator are blended by dry-blending separately granulated material into detergent fabric (particles).

<Enzymes> Enzymes (enzymes which essentially carry out an enzymatic action during the washing step) can be classified into hydrolases, oxidoreductases, lyases, transferases and isomerases by classifying them based on their reactivity. But any of them can be applied to the present invention.
Particularly preferred are proteases, esterases, lipases, nucleases, cellulases, amylases and pectinases.

<Fluorescent Dyes> As fluorescent dyes, 4,4'-bis- (2-sulfostyryl) -biphenyl salt, 4,4'-bis- (4-chloro-3-sulfostyryl) -biphenyl salt, One or more of a ((styrylphenyl) naphthothiazole derivative, a 4,4'-bis (triazol-2-yl) stilbene derivative, and a bis (triazinylamino) stilbene disulfonic acid derivative in a composition, ~ 2
Wt%, for example, Whitex SA
(Manufactured by Sumitomo Chemical Co., Ltd.) and Cinopearl CBS (manufactured by Ciba-Geigy Corporation).

The shape of the detergent composition of the present invention may be any of liquid, powder, granule, and lump, and it is usually used in a known production method such as spray drying, spray mix method, crushing granulation method, and beads containing inorganic builder. It can be produced by a method of impregnation, a method of producing a high-density granular detergent, a method of producing a detergent such as a tablet, a flake, or a bar, a method of producing a liquid detergent such as a batch mixing method, a continuous mixing method, or the like.

When the cleaning composition of the present invention is used as a powdery or granular composition, its production method is not particularly limited, and a conventionally known method can be used. The method for increasing the bulk density includes, for example, a method of spraying a nonionic surfactant onto spray-dried particles to increase the density, and a method of increasing the density while directly absorbing nonions into the powder component including the oil-absorbing carrier. However, JP-A-61-69897, JP-A-61-69899, JP-A-61-69900, JP-A-2-222498, JP-A-2-22
2499, JP-A-3-33199, JP-A-5-86400, and JP-A-5-209200 can be referred to. In addition, a small amount of the crystalline aluminosilicate may be added during the granulation or immediately before the completion of the granulation in order to use it as a surface modifier for the granulated material. When a crystalline silicate is blended, the crystalline silicate is preferably added at the time of increasing the bulk density or by dry blending. When the alkali metal carbonate is blended, it may be added to the slurry, during the granulation or in the dry blend.

When the detergent composition of the present invention is a powdery or granular composition, the average particle size is desirably 200 to 1000 μm, particularly preferably 200 to 600 μm, in order to obtain preferable powder properties.

The bulk density in this case is 0.5 to 1.2.
g / cm ^3, preferably 0.6~1.0g / cm ³ order.

The detergent composition of the present invention is adjusted to a concentration suitable for each washing depending on washing methods such as washing machine washing and pickling washing, as well as the amount of clothes and water, the degree of dirt, and the use of machines. Can be used. For example, in the case of washing in a washing machine, it can be used at a washing concentration of 0.03 to 0.3% by weight.

[0071]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

[0072] Structure of the surfactant used in the present embodiment, abbreviations, fatty permeability coefficient, the HLB value in Tables 1 and 2, the structure of the chelating agent, abbreviations, chelate stability constant of Ca ²⁺ (hereinafter pK
(Abbreviated as _Ca ) are shown in Tables 3 and 4.

[0073]

[Table 1]

[0074]

[Table 2]

[0075]

[Table 3]

[0076]

[Table 4]

Example 1 Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

<Preparation of High-Density Granular Detergent Composition> Composition No. 1 in Table 5 was prepared by the following method. 0.5 kg zeolite, AA
-MA copolymer 0.1kg, sodium carbonate 1.0kg, sodium silicate 0.5
kg, fluorescent dye (4,4-bis- (2-sulfostyryl) -biphenyl salt) 0.05 kg
A 60% solids water slurry is prepared, and the resulting particles are spray-dried, and the resulting particles are placed in a high-speed mixer (stirring tumbling granulator, manufactured by Fukae Kogyo Co., Ltd.).
g, 0.5 kg of silicate (X) and 3.0 kg of APC-1 are added, and while these are mixed, 2.5 kg of AAO-1 and 0.1 kg of PEG heated to 70 ° C. are gradually added, and the granulation is performed. went. Thirty seconds before the end of granulation, 0.5 kg of zeoite was further added. The obtained detergent granulated dough and 0.1 kg of the enzyme were mixed in a V blender to obtain a high-density granular detergent composition (average particle size 480 μm, bulk density
760 g / l). With respect to the other compositions in Tables 5 and 6, a high bulk density granular detergent composition was prepared in accordance with the above-mentioned scheme, with each mixing ratio. The obtained high bulk density granular detergent composition was subjected to a detergency test by the following method.

<Detergency Test> (Preparation of Artificially Contaminated Cloth) An artificially contaminated cloth was prepared by attaching an artificially contaminated liquid having the following composition to the cloth. The artificial contaminant was attached to the cloth by printing the artificial contaminant on the cloth using a gravure roll coater. The process of adhering the artificially contaminated liquid to the cloth to produce the artificially contaminated cloth is based on the cell capacity of the gravure roll.
The drying was performed at 8 cm ³ / cm ² , a coating speed of 1.0 m / min, a drying temperature of 100 ° C., and a drying time of 1 minute. The cloth used was a cotton gold cloth 2003 (manufactured by Tanito Shoten).

[Composition of artificial contaminated liquid] Lauric acid 0.44% by weight Myristinic acid 3.09% by weight Pentadecanoic acid 2.31% by weight Palmitic acid 6.18% by weight Heptadecanoic acid 0.44% by weight Stearic acid 1.57% by weight Oleic acid 7.75% by weight 13.06% by weight % N-hexadecyl palmitate 2.18% by weight Squalene 6.53% by weight Egg white lecithin liquid crystal 1.94% by weight Kanuma red clay 8.11% by weight Carbon black 0.01% by weight Tap water balance (Washing conditions and evaluation method) 5 pieces of the artificially contaminated cloth of 10 cm × 10 cm prepared in the above were put in, and washed at 100 rpm with a tergotometer. The washing conditions are as follows.・ Washing conditions Washing time 10 minutes Washing agent concentration 0.067% Water hardness 4 ° DH Water temperature 10 ° C Rinse for 5 minutes with tap water Washing power is the self-recording color at 550 nm of the original cloth before and after cleaning. The cleaning rate (%) was determined by the following equation, and the average of the measured values of the five sheets was shown as the cleaning power.

[0081]

(Equation 2)

[0082]

[Table 5]

[0083]

[Table 6]

(Note) zeolite: composition M ₂ O.Al ₂ O ₃ .2SiO ₂ .2H ₂ O, average particle diameter 4 μm, ion exchange capacity 290 CaCO ₃ mg / g silicate (X): composition M ₂ O・ 1.8SiO ₂・ 0.02M'O (where,
M: Na, K, K / Na = 0.03, M '= Ca, Mg, Mg / Ca = 0.01), ion exchange capacity 290 CaCO ₃ mg / g, average particle diameter 30 μm (crystal represented by general formula (X) (Silicate) ・ silicate (XI): composition M ₂ O ・ 2SiO ₂ , ion exchange capacity 224C
aCO ₃ mg / g, average particle size 30 μm (crystalline silicate represented by general formula (XI)) AA-MA copolymer: acrylic acid / maleic acid (molar ratio 7)
/ 3) Na salt of copolymer, average molecular weight 70,000 ・ PEG: polyethylene glycol with average molecular weight 7,000 ・ Common components: enzyme [Sabinase 12.0TW (manufactured by Novo Nordisk), lipolase 100T (manufactured by Novo Nordisk),
Cellzyme 0.1T (Novo Nordisk), Termamill
60T (manufactured by Novo Nordisk) in a ratio of 2: 1: 1: 1] 1%, fluorescent dye (compound ratio: Tinopearl CBS)
0.5% (weight ratio) / Whitetex SA (manufactured by Sumitomo Chemical Co., Ltd.) and sodium sulfate, and the total amount was adjusted to 100% with sodium sulfate.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C11D 3:33) (72) Inventor Tomoki Yanagisawa 1334 Minato, Wakayama-shi, Wakayama Prefecture Kao Research Laboratory (72) Inventor Yoshihiro Iwamoto Wakayama 1334 Minato 1334 Minato, Wakayama-shi, Japan Kao Corporation Research Institute (72) Inventor Sachiko Ueoka 1334 Minato, Wakayama-shi, Wakayama Prefecture

Claims (16)

[Claims] (1) (a) a fatty acid permeability coefficient of not less than 0.13 and H
A detergent composition comprising a surfactant having an LB of 11 or more and (b) a chelating agent having a chelate stability constant of 6 or more with Ca ²⁺ . 2. The cleaning composition according to claim 1, wherein the component (a) is a nonionic surfactant. 3. The cleaning composition according to claim 1, wherein the component (a) is a surfactant represented by the following general formula (I). Embedded image (Wherein R ₁ is a linear or branched alkyl or alkenyl group having 7 to 19 carbon atoms, R ₂ is H, an alkyl group or alkenyl group having 1 to 3 carbon atoms, R ₃ and R ₄ are To 3 alkyl groups or alkenyl groups, and n is a number of 1 to 5.) 4. The cleaning composition according to claim 1, wherein the component (a) is a surfactant represented by the following general formulas (II) -1 to (II) -3. Embedded image 5. The cleaning composition according to claim 1, wherein the component (a) is a surfactant represented by the following general formula (III). Embedded image (Wherein, R ₁ represents a linear or branched alkyl group or alkenyl group having 7 to 19 carbon atoms, R ₂ represents H, and having 1 to 24 carbon atoms.
A linear or branched alkyl or alkenyl group of
_{C 2 H 4 O (AO)} n H, C 3 H 6 (AO) n H, CH 2 CH (O (AO) n H) CH 3, CH 2 CH
A group represented by _{(O (AO) n H)} CH 2 O (AO) n H. Here, AO represents ethylene oxide or propylene oxide, and n represents a number of 0 to 100. ) 6. The cleaning composition according to claim 1, wherein the component (a) is a surfactant represented by the following general formula (IV). Embedded image (Wherein, R ₁ represents a straight-chain or branched alkyl group or alkenyl group having 9 to 19 carbon atoms, R ₂ represents H, an alkyl group or alkenyl group having 1 to 3 carbon atoms, and AO represents ethylene oxide or Propylene oxide, n is a number from 0 to 5, m
Represents a number of 1 or 2. ) 7. The cleaning composition according to claim 1, wherein the component (b) is a chelating agent represented by the following general formula (V). Embedded image (Wherein, R is H, OH, or an alkyl group having 1 to 3 carbon atoms. N is 0 to 2, and A is H, OH, or COOM.
A does not become OH at the same time. M is the counter ion. ) 8. The cleaning composition according to claim 1, wherein the component (b) is a chelating agent represented by the following general formula (VI). Embedded image 9. The cleaning composition according to claim 1, wherein the component (b) is a chelating agent represented by the following general formula (VII). Embedded image 10. The cleaning composition according to claim 1, wherein the component (b) is a chelating agent represented by the following general formula (VIII). Embedded image 11. The cleaning composition according to claim 1, wherein the component (b) is a chelating agent represented by the following general formula (IX). Embedded image 12. The composition according to claim 1, wherein the component (a) is contained in an amount of 3 to 50% by weight in the composition and based on the total amount of the surfactant in the detergent composition.
The cleaning composition according to any one of claims 1 to 11, wherein the proportion of the component (a) is 20% by weight or more. 13. The cleaning composition according to claim 1, wherein component (b) is contained in the composition in an amount of 3 to 50% by weight. (C) a weight average molecular weight of 1,000 to 15 comprising monoethylenically unsaturated mono- and dicarboxylic acid units;
14. The cleaning composition according to any one of claims 1 to 13, wherein the cleaning composition contains 000 high molecular weight polymer salts. 15. The cleaning composition according to claim 1, comprising (d) 1 to 40% by weight of a crystalline silicate of the following general formula (X) and / or (XI). . _{x (M 2 O) · y} (SiO 2) · z (Me m O n) · w (H 2 O) (X) ( wherein, M represents a Group Ia elements of the periodic table, Me represents a Group IIa Element, a group IIb element, a group IIIa element, a group selected from the group IVa element or the group VIII element, or a combination of two or more elements, y / x = 0.5 to 2.6, z / x = 0.01 to 0.9, w = 0 ~ 20, n / m =
0.5 to 2.0. ) M ₂ O · x ′ (SiO ₂ ) · y ′ (H ₂ O) (XI) (where M represents an alkali metal, x ′ = 1.5 to 2.6, y ′ = 0 to
20. ) 16. The cleaning composition according to claim 1, comprising 1 to 60% by weight of an aluminosilicate.