JP2008044988A - Powdery detergent composition for clothes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powdery detergent composition comprising a clay mineral for clothes that can impart washed clothes with excellent softness while washing matter such as fibrous products. <P>SOLUTION: The powdery detergent composition for clothes comprises (a) a smectite clay mineral represented by general formula (I) below (provided that the Na/Li mass ratio is 100/1 to 800/1), (b) an anionic surfactant and (c) a nonionic surfactant each in concentration within a specific range. [Si<SB>8</SB>(Mg<SB>a</SB>Al<SB>b</SB>)O<SB>20</SB>(OH)<SB>4</SB>]<SP>x-</SP>Me<SP>x+</SP>(I) (wherein 0<a≤6; 0<b≤4; x=12-2a-3b; and Me is at least one of Na, K, Li, Ca<SP>1/2</SP>, Mg<SP>1/2</SP>and NH<SB>4</SB>). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a powder detergent composition for clothing using a clay mineral as a softening base, and a washing method capable of imparting flexibility to clothing.

  Conventionally, a softening agent has been added to the cleaning agent to prevent the fiber product after washing from losing its softness due to dropping off of the fiber treatment agent or adhesion of salts, etc. Has been studied. As a softening agent that is deposited on the fiber surface and imparts flexibility to the texture of the fiber product, conventionally, a clay mineral such as smectite (see, for example, Patent Document 1), a cation interface such as a dialkyl type quaternary ammonium salt. Activators (for example, see Non-Patent Document 1), silicones such as poly (dimethylsiloxane) (for example, see Patent Document 2), and the like have been used.

In recent years, methods for enhancing the softening effect of clay minerals have been studied from the standpoint of ease of blending and environmental response. For example, a combination of bentonite and a pentaerythritol compound (for example, see Patent Document 3), a combination of a clay mineral and a flocculant (for example, see Patent Document 4), a combination of bentonite and a soluble potassium salt (for example, Patent Document 5, Non-Patent Document 1) is known.
JP-A-49-85102 JP 2002-249799 A Japanese Patent Laid-Open No. 5-140869 Special Table 2002-541342 Japanese National Patent Publication No. 8-506843 Collection of well-known and commonly used techniques (powder detergent for clothing), published by the JPO Gazette, Heisei 10 (1998) .3.26

  The use of clay minerals is advantageous in terms of ease of blending, environmental friendliness, and the like, but has not yet provided sufficient flexibility in a normal cleaning process.

  An object of the present invention is to provide a powder detergent composition for clothing capable of imparting excellent flexibility to the washed article simultaneously with washing of the article to be washed such as a textile product in the detergent composition using clay mineral, and the powder for clothing It is in providing the washing | cleaning method using a detergent composition.

The present invention comprises (a) 5-30% by mass of a smectite-type clay mineral represented by the following general formula (I) (however, the mass ratio of Na / Li is 100/1 to 800/1), (b) The present invention relates to a powder detergent composition for clothing containing 5 to 30% by mass of an anionic surfactant and (c) 0.1 to 10% by mass of a nonionic surfactant.
_{[Si 8 (Mg a Al b} ) O 20 (OH) 4] x- · Me x + (I)
(In the formula, 0 <a ≦ 6, 0 <b ≦ 4, x = 12-2a-3b, Me is at least one of Na, K, Li, Ca ^1/2 , Mg ^1/2 and NH _4. is there.)

Further, the present invention provides (a) a smectite type clay mineral represented by the following general formula (I) (however, the mass ratio of Na / Li is 100/1 to 800/1) [hereinafter referred to as component (a) 5-30 mass%, (b) anionic surfactant (hereinafter referred to as component (b)) 5-30 mass%, and (c) nonionic surfactant (hereinafter referred to as component (c)) 0 It is related with the washing | cleaning method which can provide a softness | flexibility to clothing using the powder detergent composition for clothing containing 0.1-10 mass% per 1 kg of clothing.
_{[Si 8 (Mg a Al b} ) O 20 (OH) 4] x- · Me x + (I)
(In the formula, 0 <a ≦ 6, 0 <b ≦ 4, x = 12-2a-3b, Me is at least one of Na, K, Li, Ca ^1/2 , Mg ^1/2 and NH _4. is there.)

  ADVANTAGE OF THE INVENTION According to this invention, the powder detergent composition for clothing which is excellent in the softness | flexibility provision effect with respect to textiles, such as clothing, and was excellent also in the detergency is provided. By washing clothes and the like using this composition, a treatment for imparting flexibility can be performed together with washing.

  From the viewpoint of cleaning performance and solubility, the surfactant equivalent of JIS K 3362: 1998 of the powder detergent composition for clothing of the present invention is preferably 20 to 50% by mass, more preferably 25 to 45% by mass, 30 -40 mass% is still more preferable.

  The powder detergent composition for clothing of the present invention preferably has a pH of 8 to 12 of a 0.1% by mass aqueous solution measured at 20 ° C. described in JIS K 3362: 1998 from the viewpoint of cleaning performance and damage. -11.5 is more preferable, 9.5-11 is still more preferable, and 10-11 is especially preferable. It is preferable to adjust to such a range with a pH adjuster, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, alkali metal carbonates such as sodium carbonate and potassium carbonate, sodium silicate, potassium silicate Alkali metal silicates such as can be used.

  In terms of solubility, the powder detergent composition for clothing of the present invention has an apparent density of preferably 1600 g / L or less, more preferably 1300 g / L or less, more preferably 1000 g / L, as measured by the method defined by JIS K 3362: 1998. The following is more preferable. Further, from the viewpoint of convenience and reduction of waste (such as boxes), the apparent density is preferably 300 g / L or more, more preferably 600 g / L or more, and further preferably 700 g / L or more. From the viewpoint of solubility, the average particle size of the powder detergent composition obtained from the mass fraction depending on the size of the sieve mesh is preferably 150 to 1000 μm, more preferably, after vibrating for 5 minutes using a standard sieve of JIS Z 8801. It is 150-800 micrometers, More preferably, it is 180-600 micrometers. Further, from the viewpoint of convenience, it may be further compressed into a tablet form, and a single use amount can be stored in a water-soluble or water-insoluble container.

  From the viewpoint of the flexibility effect, the powder detergent composition for clothing of the present invention is preferably used in an amount of 5 to 15 g, more preferably 6 to 12 g, and still more preferably 7 to 10 g with respect to 1 kg of clothing.

<(A) component>
The powder detergent composition for clothing of the present invention comprises a smectite clay mineral represented by the following general formula (I) as a component (a) (however, the mass ratio of Na / Li is 100/1 to 800/1). 5-30 mass% is contained. 7-25 mass% is preferable from a viewpoint of a softness | flexibility effect and washing | cleaning performance, 9-20 mass% is more preferable, and 11-16 mass% is still more preferable.
_{[Si 8 (Mg a Al b} ) O 20 (OH) 4] x- · Me x + (I)
(In the formula, 0 <a ≦ 6, 0 <b ≦ 4, x = 12-2a-3b, Me is at least one of Na, K, Li, Ca ^1/2 , Mg ^1/2 and NH _4. is there.)

  From the viewpoint of the flexibility effect, the mass ratio of Na / Li in the component (a) is preferably 150/1 to 700/1, more preferably 200/1 to 600/1, and further preferably 250/1 to 500/1. .

  From the viewpoint of the flexibility effect, the component (a) in the general formula (I) is preferably such that 50% by mass or more of Me is Na, more preferably 60% by mass or more, still more preferably 65% by mass or more, and 70 A mass% or more is particularly preferred.

  As a method for obtaining a clay mineral having a mass ratio of Na / Li according to the present invention, if it is a natural product, the production area may be selected, or, for example, when producing a granulated granule, Na salt, Li salt, etc. It is also possible to adjust by adding. Moreover, if it is a synthetic | combination product, it can adjust arbitrarily by a well-known method.

  The following production method is useful as a method for producing a clay granule having a Na / Li mass ratio of the present invention. A manufacturing method including a step of drying after adding a Na salt such as powdered sodium carbonate or a Li salt such as lithium carbonate to a raw clay ore containing 20% or more of moisture, or a granulating machine for a clay mineral pulverized into a powder form It is a manufacturing method including the process of adding powder and aqueous solution of Na salt, such as sodium carbonate, Li salt, such as lithium carbonate, when using and granulating.

  The mass ratio of Na and Li in the component (a) is as follows: a clay mineral is pulverized in a mortar, and 0.1 g of a sample passing through a sieve having an opening of 125 μm is subjected to sulfuric acid-hydrogen peroxide using a microwave wet ashing apparatus (automatic). After decomposition, the volume can be made up to 50 mL in a volumetric flask, measured with an ICP emission spectrometer, and the Na mass and Li mass can be quantified and calculated. Similarly, the mass% of Na in Me can be calculated by quantifying the mass of all atoms corresponding to Me in the general formula (I) including Na and Li.

<(B) component>
The powder detergent composition for clothing of the present invention contains 5 to 30% by mass of an anionic surfactant as the component (b). 10-28 mass% is preferable from a viewpoint of a softness | flexibility effect and washing | cleaning performance, 13-26 mass% is more preferable, and 16-24 mass% is still more preferable.

  As component (b), a sulfate ester salt of an alcohol having 10 to 18 carbon atoms, a sulfate ester salt of an alkoxylated product of an alcohol having 8 to 20 carbon atoms, an alkylbenzene sulfonate, a paraffin sulfonate, an α-olefin sulfonate , Α-sulfo fatty acid salt, α-sulfo fatty acid alkyl ester salt or fatty acid salt are preferred. As the counter ion, alkali metal salts and amines are preferable, and sodium and / or potassium, monoethanolamine, and diethanolamine are particularly preferable.

  From the viewpoint of flexibility effect and cleaning performance, it is preferable to contain at least α-sulfo fatty acid alkyl ester salt as component (b) in the powder detergent composition for clothing in an amount of 2 to 20% by mass, more preferably 3 to 16% by mass. 3 to 12% by mass is more preferable, and 4 to 10% by mass is particularly preferable.

  From the viewpoints of flexibility effect and cleaning performance, the α-sulfo fatty acid alkyl ester salt is saturated or unsaturated α- having 8 to 20 carbon atoms (preferably 12 to 18 carbon atoms, more preferably 14 to 16 carbon atoms). Methyl, ethyl or propyl ester salts of sulfo fatty acids are preferred, and methyl ester salts of saturated or unsaturated α-sulfo fatty acids having 12 to 18 carbon atoms (preferably 14 to 16 carbon atoms) are particularly preferred.

  From the viewpoint of flexibility effect and washing performance, α-sulfo fatty acid alkyl ester salt (b1) α-sulfomyristic acid alkyl ester salt (hereinafter referred to as component (b1)) and (b2) α-palmitic acid alkyl ester salt [ Hereinafter referred to as (b2) component], and in the α-sulfo fatty acid alkyl ester salt, the total amount of component (b1) and component (b2) is preferably 80% by mass or more, more preferably 90% by mass or more, 95 mass% or more is more preferable, and 98 mass% or more is especially preferable.

  Further, from the viewpoint of flexibility effect and cleaning performance, the mass ratio of the component (b1) / (b2) is preferably 1/9 to 3/7, more preferably 12/88 to 28/72, and 15/85. More preferred is 25/75.

  From the viewpoints of flexibility effect and cleaning performance, the mass ratio of sodium salt / potassium salt of α-sulfo fatty acid alkyl ester salt is preferably 100/0 to 50/50, more preferably 95/5 to 60/40, 90 / 10 to 70/30 is more preferable.

  From the viewpoint of the flexibility effect, the mass ratio of the component (a) / α-sulfo fatty acid alkyl ester salt is preferably 6/1 to 3/4, more preferably 5/1 to 5/6, and 4/1 to 1. / 1 is more preferable, and 3/1 to 6/5 is particularly preferable.

  From the viewpoint of the flexibility effect, it is preferable to contain a fatty acid salt as the component (b), and a mass ratio of α-sulfo fatty acid alkyl ester salt / fatty acid salt is preferably 2/1 to 1/3, and 1/1 to 2 / 5 is more preferable, and 4/5 to 1/2 is particularly preferable.

<(C) component>
The powder detergent composition for clothing of the present invention contains 0.1 to 10% by mass of a nonionic surfactant as component (c). 0.5-9 mass% is preferable from a viewpoint of a softness | flexibility effect and washing | cleaning performance, 1-8 mass% is more preferable, and 2-7 mass% is still more preferable.

  (C) As a component, polyoxyalkylene alkyl (carbon number 8-20) ether, alkyl polyglycoside, polyoxyalkylene alkyl (carbon number 8-20) phenyl ether, polyoxyalkylene sorbitan fatty acid (carbon number 8-22) Examples thereof include esters, polyoxyalkylene glycol fatty acid (carbon number 8 to 22) esters, and polyoxyethylene polyoxypropylene block polymers. Among these, nonionic surfactants represented by the following general formula (II) are preferable.

^{R 1 -X - [(EO)} n / (PO) m] -R 2 (II)
(Wherein R ¹ represents a hydrophobic group having 8 to 20 carbon atoms, —X— represents —O—, —COO—, —CONH—, EO represents an oxyethylene group, PO represents an oxypropylene group, n and m) Represents the average number of moles added, n is 3 to 20, preferably 5 to 15, m is 0 to 6, preferably 0 to 3. The addition form of the EO group and the PO group may be block or random. R ² is a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms.)

In the formula, R ¹ preferably has 12 to 18 carbon atoms, the hydrophobic group is preferably a hydrocarbon group, preferably an alkyl group or an alkenyl group, -X- is preferably -O-, m is preferably 0, R ² Is preferably a hydrogen atom.

<(D) component>
From the viewpoint of flexibility effect and cleaning performance, the detergent composition of the present invention preferably contains 5 to 40% by mass of alkali metal carbonate as component (d), more preferably 10 to 38% by mass, and 20 -36 mass% is still more preferable.

  (D) As a component, sodium carbonate and potassium carbonate are mentioned. Especially, it is preferable that sodium carbonate salt and potassium carbonate salt are included. The mass ratio of sodium carbonate / potassium carbonate is preferably 10/0 to 4/6, more preferably 9/1 to 3/4, still more preferably 8/1 to 1/1, and 7/1 to 2/1. Is particularly preferable, and 6/1 to 4/1 is most preferable. In the component (d), the total amount of sodium carbonate salt and potassium carbonate salt is preferably 90% by mass or more, and more preferably 95% by mass or more.

<Other ingredients>
The powder detergent composition for clothing of the present invention comprises other surfactants, builders, anti-staining agents (such as carboxymethylcellulose), softeners, bleaches (percarbonates, percarbonates) known in the field of detergents for clothing. Borate, etc.), bleach activator, fluorescent brightener, foam suppressor (silicone, etc.), enzyme (cellulase, protease, amylase, etc.), reducing agent (sulfite, etc.), colorant, flavor, etc. be able to.

  (D) Examples of the builder other than the components include detergents and washing encyclopedias, Asakura Shoten Co., Ltd., November 25, 1990, first edition, first edition, Haruhiko Okuyama, Motoki Minagawa, pages 56-74. It is done. Among them, zeolite, amorphous aluminosilicate, crystalline silicate, sodium tripolyphosphate, sodium pyrophosphate, and silicate are preferable as the inorganic builder, and aminocarboxylate and hydroxyaminocarboxylic acid are preferable as the organic builder. Salts, hydroxycarboxylates, cyclocarboxylates, ether carboxylates, and organic carboxylic acid (salt) polymers are preferred. In particular, zeolite and silicate are preferable as the inorganic builder, and organic carboxylic acid (salt) polymer is preferable as the organic builder.

  Surface modification may be performed from the viewpoint of the fluidity of the detergent particles and the caking resistance. Examples of the surface modifier include aluminosilicates, calcium silicates, silicon dioxide, clay minerals, amorphous silica derivatives, silicate compounds such as crystalline silicate compounds, and fine powders such as metal soaps. Aluminosilicates and crystalline silicates are more preferable, and aluminosilicates are more preferable. The content of the surface modifier is preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 10% by mass or less in the detergent composition of the present invention in terms of storage stability. Moreover, 1 mass% or more in the detergent composition of this invention is preferable at the point of surface modification, 3 mass% or more is more preferable, and 5 mass% or more is still more preferable.

  The powder detergent composition shown in Table 1 was produced, and the flexibility effect and cleaning performance were evaluated by the following methods. In addition, as for the composition of Table 1, pH of 0.1 mass% aqueous solution measured at 20 degreeC of JISK3362: 1998 all was 10-11. Moreover, the apparent density measured by the method prescribed | regulated by JISK3362: 1998 was all 700-1000 g / L. Moreover, after vibrating for 5 minutes using the standard sieve of JISZ8801, the average particle diameter of the powder detergent composition calculated | required from the mass fraction by the size of a sieve mesh was 180-600 micrometers.

[Method for evaluating flexibility effect]
(Preparation of evaluation towel)
A commercially available cotton towel (100% cotton) was pretreated with a pretreatment agent using a mini washing machine (“N-BK2” manufactured by National Panasonic Matsushita Electric). In this case, the pretreatment agent includes (X) a nonionic surfactant (average of 6 moles of ethylene oxide added to a primary alcohol having 12 carbon atoms), (Y) crystalline silicate ("pre-feed granule product" ], (Z) Sodium carbonate was mixed at (X) :( Y) :( Z) = 1: 1: 3 (mass ratio) at 0.5 g / L. In the pretreatment, after washing at a water temperature of 20 ° C. for 7 minutes, a cycle of centrifugal dehydration, rinsing for 3 minutes, dehydration, rinsing for 3 minutes, and dehydration was repeated 5 times in total, and the pretreatment agent was removed before the evaluation towel (previous Treated towel).

(Cleaning conditions and evaluation method)
In 7 L of water at 20 ° C., 3.5 g of the detergent composition shown in Table 1 was dissolved, and 0.4 kg of cotton towel (4 pieces of 70 cm × 30 cm) was added and washed for 7 minutes. After dehydration, the towel was rinsed with 7 L of water for 3 minutes, dehydrated, rinsed for 3 minutes, dehydrated and air dried.

A pair of a cotton towel washed with a detergent composition and a pre-treated towel was used as a pair, and five judges judged the sensory evaluation of the softness of the touch. If there is no difference and the wash towel is harder than the pre-treated towel, 0 points, 1 point if slightly softened, 2 points if slightly softened, 3 points if clearly softened, 5 people The total points were shown as follows.
Evaluation criteria A: Total 10 points or more B: Total 5 points or more and 9 points or less C: Total 4 points or less

[Evaluation method of cleaning performance]
A collar covering described in JIS K3362: 1998 was prepared, and the detergent composition shown in Table 1 and an index detergent for determining cleaning power were used in accordance with the method for evaluating the cleaning power of a synthetic detergent for clothing described in JIS K3362: 1998. The detergency was compared. The use concentration of the detergent composition in Table 1 was 0.5 g / L. However, the calcium chloride dihydrate used in the water used was 270 mg / L. Judgment was made according to the following criteria.
○: Detergency is better than index detergent △: Detergent is equivalent to index detergent ×: Detergency is worse than index detergent

The components in the table are as follows. Note that EO is an abbreviation for ethylene oxide and PO is an abbreviation for propylene oxide.
Clay mineral 1: Granulated round rosyl DG (manufactured by Zud Chemie) together with powdered sodium carbonate and powdered lithium carbonate (Na / Li mass ratio: 400/1, sodium salt content in Me in the general formula (I) 72% by mass)
Clay mineral 2: Granulated round rosyl DG (manufactured by Zud Chemie) together with powdered sodium carbonate and powdered lithium carbonate (Na / Li mass ratio: 400/1, sodium salt content in Me in the general formula (I) 40% by mass)
-Clay mineral 3: Granulated round rosyl DG (manufactured by Sud Chemie) together with powdered sodium carbonate and powdered lithium carbonate (Na / Li mass ratio: 200/1, sodium salt content in Me in general formula (I) 72% by mass)
Clay mineral 4: Granulated round rosyl DG (manufactured by Sud Chemie) together with powdered sodium carbonate and powdered lithium carbonate (Na / Li mass ratio: 50/1, sodium salt content in Me in general formula (I) 72% by mass)
-Clay mineral 5: Granulated round rosyl DG (manufactured by Zud Chemie) together with powdered sodium carbonate and powdered lithium carbonate (Na / Li mass ratio: 1200/1, content of sodium salt in Me in the general formula (I) 72% by mass)
Α-SFE-Na1: α-sulfolauric acid methyl ester sodium α-SFE-Na2: α-sulfomyristic acid sodium methyl ester α-SFE-Na3: α-sulfopalmitic acid methyl ester sodium α-SFE- Na4: Sodium α-sulfostearic acid methyl ester · α-SFE-K: α-sulfo fatty acid methyl ester potassium (14 fatty acids / 16 fatty acids = 20/80, mass ratio)
LAS-Na: sodium alkylbenzenesulfonate having 10 to 14 carbon atoms in the alkyl group Soap: palm kernel oil fatty acid sodium non-ionic surfactant 1: straight-chain primary alcohol having 12 to 14 carbon atoms, EO Nonionic surfactants with an average of 7 moles added: Nonionic surfactants with an average of 7 moles of EO added to secondary alcohols having 12 to 14 carbon atoms (Nippon Shokubai Co., Ltd., Softanol) 70H)
Nonionic surfactant 3: Nonionic surfactant obtained by adding a block to a linear primary alcohol having 12 to 14 carbon atoms in the order of an average of 5 mol of EO, an average of 2 mol of PO, and an average of 3 mol of EO PEG: Polyethylene glycol (weight average molecular weight 13000)
AA / MA polymer: acrylic acid-maleic acid copolymer (sodium salt (70 mol% neutralized), monomer ratio is acrylic acid / maleic acid = 3/7 (molar ratio), average molecular weight 70000)
・ Fluorescent dye: Chino Pearl CBS-X (Ciba Specialty Chemicals)
-Enzyme: Cellulase K (described in JP-A 63-264699) and Lipolase 100T (manufactured by Novo) at a mass ratio of 3: 1-Bleaching agent: sodium carbonate-Hydrogen peroxide adduct (percarbonate Sodium) (Bleach particles described in paragraph 0019 of JP-A-2000-256699)
Bleach activator: sodium lauroyloxybenzenesulfonate granulated product (bleach agent particles described in paragraph 0018 of JP-A No. 2000-256699)

Claims (9)

(A) Smectite type clay mineral represented by the following general formula (I) (however, the mass ratio of Na / Li is 100/1 to 800/1) 5 to 30% by mass, (b) anionic surface activity A powder detergent composition for clothing containing 5 to 30% by weight of an agent and (c) 0.1 to 10% by weight of a nonionic surfactant.
_{[Si 8 (Mg a Al b} ) O 20 (OH) 4] x- · Me x + (I)
(In the formula, 0 <a ≦ 6, 0 <b ≦ 4, x = 12-2a-3b, Me is at least one of Na, K, Li, Ca ^1/2 , Mg ^1/2 and NH _4. is there.) The powder detergent composition for clothing according to claim 1, further comprising (d) 5 to 40% by mass of an alkali metal carbonate and a mass ratio of sodium carbonate / potassium carbonate of 10/0 to 4/6. The powder detergent composition for clothing according to claim 1 or 2, wherein 50% by mass or more of Me in the general formula (I) in the component (a) is Na. The powder detergent composition for clothing according to any one of claims 1 to 3, wherein 2 to 20% by mass of at least an α-sulfo fatty acid alkyl ester salt as a component is contained in the powder detergent composition for clothing. The powder detergent composition for clothing according to claim 4, wherein the mass ratio of component (a) / α-sulfo fatty acid alkyl ester salt is 6/1 to 3/4. The α-sulfo fatty acid alkyl ester salt contains (b1) α-sulfomyristate alkyl ester salt and (b2) α-palmitate alkyl ester salt, and the mass ratio of (b1) / (b2) is 1/9 to 3 The powder detergent composition for clothing according to claim 4 or 5, wherein the total amount of the component (b1) and the component (b2) in the α-sulfo fatty acid alkyl ester salt is 90% by mass or more. The powder detergent composition for clothing according to any one of claims 4 to 6, comprising a fatty acid salt as a component (b) and a mass ratio of α-sulfo fatty acid alkyl ester salt / fatty acid salt of 2/1 to 1/3. The powder detergent composition for clothing according to any one of claims 1 to 7, wherein the component (c) is a nonionic surfactant represented by the following general formula (II).
^{R 1 -X - [(EO)} n / (PO) m] -R 2 (II)
(Wherein R ¹ represents a hydrophobic group having 8 to 20 carbon atoms, —X— represents —O—, —COO—, —CONH—, EO represents an oxyethylene group, PO represents an oxypropylene group, n and m) Represents an average added mole number, n is 3 to 20, and m is 0 to 6. The addition form of the EO group and the PO group may be block or random, and R ² is a hydrogen atom or 1 to 6 carbon atoms. Hydrocarbon group.) (A) Smectite type clay mineral represented by the following general formula (I) (however, the mass ratio of Na / Li is 100/1 to 800/1) 5 to 30% by mass, (b) anionic surface activity A washing method using 5 to 15 g of powder detergent composition for clothing containing 5 to 30% by weight of the agent and (c) 0.1 to 10% by weight of the nonionic surfactant.
_{[Si 8 (Mg a Al b} ) O 20 (OH) 4] x- · Me x + (I)
(In the formula, 0 <a ≦ 6, 0 <b ≦ 4, x = 12-2a-3b, Me is at least one of Na, K, Li, Ca ^1/2 , Mg ^1/2 and NH _4. is there.)