JPH10204490A - Cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a powdery cleanser composition capable of increasing properties for preventing a solid state dirt from reattaching without damaging cleansing properties and useful for washing clothes by formulating specific proportions of an inorganic phosphate, polyethylene glycol, a specified copolymer and mirabilite with a detergent. SOLUTION: This powdery cleanser composition is obtained by formulating (B) 15-30wt.% inorganic phosphate such as sodium tripolyphosphate, (C) 0.05-2.0wt.% acrylic acid-maleic acid copolymer [e.g. a random copolymer containing acrylic acid/maleic acid in the molar ratio of (8/2) to (5/5) and having several hundred to one hundred thousand molecular weight], (D) 0.05-2wt.% polyethylene glycol (e.g. the one having 5,000-15,000 average molecular weight) and (E) 15-40wt.% mirabilite based on the total weight of the composition with (A) a detergent containing a surfactant and an alkali agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a powdered detergent composition for clothing.

[0002]

2. Description of the Related Art A detergent for clothing is used to remove from a washing liquid a surfactant which solubilizes stains and dissolves and disperses the fibers from the fiber into the washing liquid, and calcium and magnesium which lower the ability of the surfactant. It is composed of a sequestering agent, an alkali agent that promotes decomposition and solubilization of dirt, a polymer compound for dispersing dirt, and other cleaning builders.

[0003] One of the functions of a cleaning builder is to prevent solid dirt once dropped from clothing from re-adhering. Builders having this action include sodium tripolyphosphate, polyacrylic acid, polyethylene glycol and the like. As a prior art including these components, US Pat. No. 4,657,693 discloses a “detergent composition having improved physical properties and solubility in low-temperature water” (surfactant, sodium tripolyphosphate). , Polyethylene glycol and polyacrylic acid), but this composition did not have sufficient performance to prevent solid soil from re-adhering.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, each of inorganic phosphate, polyethylene glycol, maleic acid acrylate copolymer and sodium sulfate has been blended in a specific ratio. It has been found that the above problem is solved by blending a surfactant and an alkali agent.

That is, the present invention provides an inorganic phosphate of 15 to 30% by weight, an acrylic acid-maleic acid copolymer of 0.05 to 2.0% by weight, a polyethylene glycol of 0.05 to 2.0% by weight,
It is intended to provide a powdery detergent composition characterized by containing a surfactant and an alkali agent in an amount of up to 40% by weight.

The inorganic phosphate used in the present invention is preferably triphosphate, orthophosphate or pyrophosphate, but the weight ratio of sodium tripolyphosphate to total phosphate is 80% by weight or more. The weight ratio of orthophosphoric acid is preferably 1 to 5% by weight, and the weight ratio of pyrophosphoric acid is preferably 2 to 5% by weight (the blending ratio is calculated as anhydride). As the counter ion, alkali metals are preferable, and sodium and / or potassium are particularly preferable. The amount of the inorganic phosphate is 15 to 30% by weight, preferably 17 to 25% by weight in the detergent composition (the amount is calculated as an anhydride).

The acrylic maleic acid copolymer used in the present invention has a function of sequestering metal ions,
It has the effect of dispersing the solid particle soil from the clothing into the washing bath and the effect of preventing the particles from reattaching (recontamination) to the clothing. For this purpose, it is preferable to blend a copolymer represented by the following formula (I) having a molecular weight of several hundred to 100,000. The copolymer is generally a random polymerization. -(Z ₁ ) m- (Z ₂ ) n- · (m + 2n) M Formula (I) (wherein, Z ₁ is a monomer unit derived from acrylic acid, and Z ₂ is a monomer unit derived from (anhydrous) maleic acid. , M + n is a value such that the molecular weight of the copolymer is several hundred to 100,000, and m: n = 8: 2
５5: 5. M is _{Na, K, NH 4, H} . The amount of the copolymer of the formula (I) is 0.05 to 2% by weight in the detergent composition.

[0008] The polyethylene glycol used in the present invention preferably has an average molecular weight of 5,000 to 15,000. Polyethylene glycol is present in the composition at 0.05-2.0% by weight,
Particularly preferably, it is contained in an amount of 0.1 to 1.0% by weight.

Glauber's salt used in the present invention is a general name of sodium sulfate, and has a function of increasing the salt strength of a washing bath and a function of forming a skeleton of the dried detergent particles similarly to an inorganic alkaline agent. is there. Glauber's salt is preferably incorporated in the composition in an amount of 15 to 40% by weight, particularly 18 to 35% by weight (the amount is calculated as an anhydride).

In the present invention, the detergency is further improved by incorporating a crystalline silicate. The crystalline silicate used in the present invention is 0.1% by weight in deionized water at 20 ° C.
The maximum pH when dispersed is 11 or more, and the dispersion 1
It is preferable to use a crystalline silicate which is excellent in alkali ability and requires 5 ml or more of 0.1 N HCl aqueous solution to adjust the pH to 10 per liter. Such a crystalline silicate is distinguished from a crystalline aluminosilicate.

Particularly preferred as crystalline silicates are those having the following composition: x (M ₂ O) · y (SiO ₂ ) · z (MemOn) · w (H ₂ O) (II) (where M is an element of Group Ia of the periodic table (particularly preferably K and / or Na) And Me is an element of group IIa of the periodic table, II
One or a combination of two or more selected from group b elements, group IIIa elements, group IVa elements or group VIII elements (preferably M
g / Ca), y / x = 0.5-2.6, z / x = 0.01-0.
9, w = 0 to 20, n / m = 0.5 to 2.0. The production method of the crystalline silicate represented by the general formula (II) can be referred to JP-A-7-89712.

Further, a crystalline silicate having the following composition can also be suitably used.

M ₂ O · x ′ (SiO ₂ ) · y ′ (H ₂ O) (III) (wherein M represents an alkali metal (particularly preferably K and / or Na) and x ′ = 1.5 to 2.6, y '= 0 to 20 (particularly preferably substantially 0). The crystalline silicate represented by the general formula (III) is disclosed in JP-A-60-227895 and Phys. Chem. Glasses. 7, 127. -138 (1966), Z. Kristall
ogr., 129, p396-p404 (1969). In addition, the product name “Na-SKS-6” from Hoechst (δ-Na ₂ Si ₂ O ₅ )
As powders and granules. In the present invention, the crystalline silicate is desirably added to the composition at 0 to 5% by weight, preferably 0.1 to 5% by weight.

The surfactant used in the present invention includes:
Although an anionic surfactant is used as a main component, in the present invention, a linear alkylbenzene sulfonate having 12 to 14 carbon atoms in the alkyl chain and an alkyl sulfate having 12 to 18 carbon atoms are particularly preferable as the counter ion. Is preferably an alkali metal, particularly preferably sodium and / or potassium. Besides this, a small amount of a fatty acid salt derived from tallow or coconut may be added.

In the present invention, the anionic surfactant is 10
-40% by weight, preferably 15-30% by weight.

The alkaline agent used in the present invention includes:
It is preferable to add a conventionally known alkali agent in addition to the crystalline silicate and the inorganic phosphate described above. Alkali agents include alkali metal carbonates such as sodium carbonate, which are collectively referred to as dense ash and light ash;
An amorphous alkali metal silicate such as IS No. 1, No. 2 or No. 3 can be used. 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. The alkali agent is preferably blended in the composition in an amount of 10 to 30% by weight, particularly preferably 15 to 25% by weight.

In addition to the above components, the detergent composition of the present invention contains a nonionic surfactant such as polyoxyethylene alkyl ether, a surfactant such as a cationic surfactant and an amphoteric surfactant, and a crystalline alumino which is a zeolite. Silicates; sequestering agents such as crystalline silicates described in JP-A-7-89712 and JP-A-60-227895; organic sequestering agents such as ethylenediaminetetraacetic acid (EDTA) and citrate; Dispersants or color transfer inhibitors such as carboxymethylcellulose (CMC), polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA); bleaching agents such as sodium percarbonate; organic peracid precursors described in JP-A-6-316700; Tetraacetylethylenediamine (T
Bleach activators such as AED), enzymes such as protease, cellulase, amylase and lipase; enzyme stabilizers such as boron compounds and sodium sulfite; fluorescent dyes of biphenyl type and stilbene type; antifoaming agents such as silicone / silica type; Conventionally known components such as antioxidants, bluing agents and fragrances can be blended in known blending amounts. As the above components, those described in JP-A-8-218093 can be used.

As the production method, a conventionally known production method can be used, and the production conditions are easily selected by those skilled in the art under appropriate conditions according to the composition.

[0019]

The composition of the present invention not only has a high detergency but also has an excellent ability to prevent solid soil from re-adhering.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

Examples 1-2 and Comparative Examples 1-4 LAS 20 kg, AA-MA copolymer 0.5 kg, polyethylene glycol 0.5 kg, sodium tripolyphosphate 20 kg, JIS 2
A water slurry of 60% solids was obtained from 10 kg of sodium silicate, 14.9 kg of soda ash, 20 kg of sodium sulfate, and 0.3 kg of fluorescent dye. The powder obtained by spray drying was put into a V blender, and 3 kg of zeolite and crystals were added. 1.5 kg of water-soluble silicate (crystalline silicate) and 1 kg of enzyme were added and mixed. The powder detergent composition of Example 1 shown in Table 1 (bulk density 0.35 g / ml, average particle diameter 400)
μm). The compositions of Example 2, Comparative Examples 1, 2, 3, and 4 were similarly prepared. Using the obtained composition, a detergency test and a recontamination prevention test were conducted by the following methods. Table 1 shows the results.

<Detergency test> (Preparation of artificially stained cloth) An artificially stained cloth was prepared by attaching an artificially stained 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 step of making the artificially contaminated cloth by attaching the artificially contaminated liquid to the cloth is performed by using a gravure roll cell capacity of 58.
cm ³ / cm ^2, coating speed 1.0 m / min, a drying temperature of 100 ° C., was performed drying time 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 Myristic 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 (Cleaning 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 0.133% Water hardness 5 ° DH Water temperature 25 ° C Rinse with tap water 5 minutes 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.

[0023]

(Equation 1)

<Resoil Prevention Test> The cloth used was a cotton cloth 2003 (manufactured by Tanigato Shoten). This cloth was washed five times with a commercial detergent attack (trade name of Kao Corporation) and cut into 10 cm × 10 cm. To 1 liter of the aqueous detergent solution for evaluation, add 2.5 g of dried Kanuma red soil and passed through a 150-mesh sieve, and put 5 pieces of the cloth prepared above at 100 rpm using a tergotometer.
And washed. The washing conditions are as follows.・ Washing conditions Washing time 10 minutes Cleaning agent concentration 0.133% Water hardness 5 ° DH Water temperature 25 ° C Rinsing 5 minutes with tap water The re-contamination prevention rate is 550 for the original cloth before contamination and the contaminated cloth after cleaning.
The reflectance at nm was measured by a self-recording colorimeter (manufactured by Shimadzu Corporation), and the re-contamination prevention rate (%) was determined by the following formula.

[0025]

(Equation 1)

[0026]

[Table 1]

(Note) LAS: linear alkyl (C ₁₂ ) benzenesulfonic acid Na salt AA-MA copolymer: acrylic acid / maleic acid (7/3 molar ratio) copolymer Na salt, average molecular weight 70,000 poly Acrylic acid: sodium polyacrylate with an average molecular weight of 6000
Salts ・ Polyethylene glycol: polyethylene glycol having an average molecular weight of 7,000 ・ STPP: sodium tripolyphosphate ・ Sodium silicate: JIS No. 2 sodium silicate ・ Crystalline silicate: 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 [crystalline silicate represented by the general formula (II)] 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 Enzyme: Sabinase 12.0TW (manufactured by Novo Nordisk)
Lipolase 100T (Novo Nordisk), Cellzyme
A mixture of 0.1T (manufactured by Novo Nordisk) and Termamyl 60T (manufactured by Novo Nordisk) in a weight ratio of 2: 1: 1: 1. Fluorescent dye: Tinopearl CBS (manufactured by Ciba Geigy) /
Whitetex SA (manufactured by Sumitomo Chemical Co., Ltd.) = 1/1 (weight ratio) mixed fluorescent dye

Claims (2)

[Claims] 1. An inorganic phosphate of 15 to 30% by weight, a maleic acid acrylate copolymer of 0.05 to 2.0% by weight, a polyethylene glycol of 0.05 to 2.0% by weight, and a sodium sulfate of 15 to 40% by weight;
A powdery detergent composition comprising a surfactant and an alkaline agent. 2. The maximum pH is 0.1 or more when 0.1% by weight is dispersed in ion-exchanged water at 20 ° C., and 0.1 N HCl aqueous solution is added to 1 liter of the dispersion to adjust the pH to 10.
2. The cleaning composition according to claim 1, which contains 0.1 to 5% by weight of a crystalline silicate required in an amount of at least ml.