JP3197990B2 - Detergent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cleaning composition.
More specifically, the present invention relates to a high-density granular detergent composition which is particularly good in foam removal during rinsing and has excellent rinsing properties.

[0002]

2. Description of the Related Art With the recent spread of fully automatic washing machines, awareness of bubbles during washing is that if bubbles are generated during washing, bubbles may overflow from the lid, and if there are many bubbles, a long rinsing time may be required. For these reasons, there is a demand for a detergent that suppresses foam formation.

As an antifoaming agent for suppressing foam generated during washing, silicone is well known and many studies have been made (Japanese Patent Application Laid-Open No. 62-57616). Research has also been conducted on a detergent builder having a low foaming effect (Japanese Patent Publication No. Sho 5
7-61799).

[0004] However, when these are used, the foam is suppressed in the early stage of washing, but the foam tends to increase with the washing time, and a sufficient effect of suppressing the turbidity of the rinsing liquid is exhibited. It was not something.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a high-density granular detergent using a surfactant, a specific nitrogen-containing polycarboxylic acid carboxylic acid, and a specific molecular weight polyethylene glycol in combination. The present inventors have found that the composition markedly improves the problem of the above-mentioned foam removal and the problem of turbidity in the rinse water, and have completed the present invention.

That is, the present invention provides a high-density granular detergent composition containing the following components (a), (b) and (c) and having a bulk density of 0.6 to 1 g / cc. (a) 10 to 40% by weight of a surfactant (b) 1 to 20% by weight of a compound represented by the following general formula (1)

[0007]

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(C) 0.5 to 5% by weight of polyethylene glycol having an average molecular weight of 5,000 to 20,000.

The surfactant of the component (a) of the present invention includes:
Commonly used anionic surfactants, nonionic surfactants, and in some cases, cationic surfactants can be used. Commonly available anionic surfactants include alkyl benzene sulfonates, alkyl sulfates,
Examples thereof include an alkyl ethoxy sulfonate, a paraffin sulfonate, an α-olefin sulfonate, an α-sulfofatty acid ester salt, and a higher fatty acid salt. As nonionic surfactants, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbite fatty acid ester, polyoxyethylene glycol fatty acid ester, polyoxyethylene polyoxypropylene alkyl ether, Polyoxyethylene castor oil, polyoxyethylene hardened castor oil, polyoxyethylene alkylamine, glycerin fatty acid ester, higher fatty acid alkanolamide, alkyl glycoside, alkylamine oxide, and the like. In particular, as the main nonionic surfactant, a polyoxyethylene alkyl ether obtained by adding ethylene oxide to a linear or branched primary or secondary alcohol having 12 to 14 carbon atoms with an average addition mole number of 6 to 12 is used. It is preferred to use Examples of the cationic surfactant include general alkyl quaternary ammonium salts.

In the present invention, it is preferable that the anionic surfactant is mainly contained and a small amount of nonionic surfactant is contained, and the weight ratio of the anionic surfactant to the nonionic surfactant is anion / nonion = 3/2 or more. preferable. Also,
It is preferable that 2/3 or more of all the surfactants used are anionic surfactants of a sulfonate type and / or a sulfate type.

In the present invention, the surfactant (a) is incorporated in the composition in a total amount of 10 to 40% by weight.

The compound represented by the general formula (1), which is the component (b) used in the present invention, is considered to act as a detergent builder.
No. 8, WO92 / 02489, JP-B-57
It can be easily manufactured by the manufacturing method described in JP-A-61799. In the present invention, the component (b) is blended in the composition in an amount of 1 to 20% by weight.

The component (c) of the present invention has an average molecular weight of 5000
Polyethylene glycol of up to 20,000 can be produced by blowing ethylene oxide into normal ethylene glycol in the presence of a catalyst under pressure and heat to polymerize the mixture. Component (c) is incorporated in the composition of the present invention in an amount of 0.5 to 5% by weight.

Further, by blending the polysiloxane compound (d) with the high-density granular detergent composition of the present invention, more excellent effects can be obtained. The polysiloxane compound used in the present invention has the following general formula

[0015]

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(In the formula, R and R ′ are an alkyl group or an aryl group having 1 to 6 carbon atoms, which may be the same or different.
n is a number from about 20 to 2000. The polysiloxanes represented by) are most often used. Among them, polydimethylsiloxane in which R and R ′ are methyl groups is preferable, and
It is incorporated in an amount of 0.01 to 0.5% by weight.

The high-density granular detergent composition of the present invention contains, in addition to the above essential components, other components such as inorganic builders such as sulfate, carbonate and silicate, protease, amylase, cellulase and lipase. Enzymes such as sulfites, sodium percarbonate, bleaching agents such as sodium perborate, polyacrylates, carboxymethylcellulose,
A re-staining agent such as polyethylene glycol, a copolymer of maleic anhydride and acrylic acid or an olefin, a fluorescent dye, a coloring agent, a preservative, a fragrance and the like can be blended as required.

The high-density granular detergent composition of the present invention is obtained, for example, by mixing and mixing a detergent composition containing the essential and optional components as described above with water, and having a water content of 30 to 50% by weight. -Preparing a water slurry, granulating a powder detergent obtained by spray-drying the slurry, and obtaining a bulk density of 0.6 to 1 g / cc;
And a high-density granular detergent composition of the present invention having an average particle size of 100 to 1000 μm. In addition, for example,
It can be easily produced by the methods described in JP-A-69897, JP-A-61-89899 and JP-A-61-69900.

[0019]

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

(1) Preparation of Detergent Among the detergent components shown in Tables 1 and 2, the components which are desirably dry-mixed later are excluding components (eg, 10% by weight of zeolite and enzymes in a small amount of additives). A slurry having a water content of 50% by weight was prepared, and the powder obtained by spray-drying the slurry was put into a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.), and 5% by weight of zeolite was moistened with 1-2% by weight of water. The mixture is granulated, and 3% by weight of zeolite is further added, and the particles obtained by granulation are dry-mixed with the remaining 2% by weight of zeolite and a small amount of additives to obtain a bulk density of 0.6 to 1.0 g / cc. Of various high-density granular detergent compositions were obtained.

In the table, PEG is an abbreviation for polyethylene glycol, and the compounds (b) of the present invention are the following compounds, which are obtained by the following production method.

[0022]

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<Production of Compound> 27 g (0.2 mol) of aspartic acid as a starting material of a compound or 15 g (0.2 mol) of glycine as a starting material of a compound, 35 g (0.2 mol) of sodium epoxysuccinate, sodium hydroxide 16
g (0.4 mol) was dissolved in 100 ml of water, and the mixture was stirred under reflux for 10 hours. Thereafter, the solvent was distilled off, and 3-hydroxy-2,2'-
68 g of tetrasodium iminodisuccinate (compound) or 51 g of disodium 3-hydroxy-2'-carboxymethyliminosuccinate (compound) were obtained.

<Production method of compound> Maleic anhydride 20
g (0.2 mol) was added to 100 ml of water and stirred at room temperature for 20 minutes. Then, 15 g of glycine, the starting material for the compound
(0.2 mol) or 27 g (0.2 mol) of aspartic acid, which is a starting material of the compound, is added to the mixture, and the pH is adjusted using sodium hydroxide.
The mixture was adjusted to 8 and stirred under reflux for 5 hours. Evaporate the solvent,
49 g of trisodium carboxymethyliminosuccinate (compound) or 66 g of tetrasodium iminodisuccinate (compound) were obtained.

All the products were confirmed by ¹ H-NMR.

(2) Measurement of Detergent Particle Size The high-density granular detergent composition produced by the method of (1) is referred to as “Ro-Tap” (type DB, No. 901001 HEIKO SEISAKU).
SHO, LTD), measure the average particle size of the product, and place the detergent composition in a cylindrical container 4 cm in diameter and 8 cm in height,
The bulk density was measured by measuring the weight. The results are shown in Tables 1 and 2.

(3) Test method for defoaming property and rinsing property The defoaming property and rinsing property were tested by the following methods using the high-density granular detergent composition produced by the method of (1). Tables 1 and 2 show the results.

The pulsator type electric washing machine (made by Toshiba) has 20
30 liters of tap water at 25 ° C., add 25 g of sample, stir and dissolve, and add 1 kg of cotton underwear and polyester / cotton blended shirt to a model oily soil 2 having the following composition.
g of the stained cloth uniformly applied thereto is placed in the above washing liquid, and strongly inverted and stirred for 10 minutes. After stopping the stirring, drain the water, dehydrate the clothes for 1 minute, rinse the pulsator with tap water, add 30 liters of tap water again, add the clothes, perform a strong reversal batch rinse for 3 minutes, and remove the foam after stopping stirring. Determine the defoaming property by the amount,
Rinsing properties were determined by the turbidity of the rinsing water.

* Model oily soil composition Cottonseed oil 60% by weight Cholesterol 10% by weight Oleic acid 10% by weight Palmitic acid 10% by weight Liquid and solid paraffin 10% by weight * Evaluation standard of defoaming property Rarely seen B: Bubbles exist at about 1/4 of the liquid level after washing C: Bubbles exist at about 1/2 of the liquid level after washing * Evaluation criteria for rinsing A: Washing liquid is transparent B: The washing liquid is almost transparent C: Turbidity is observed in the washing liquid

[0030]

[Table 1]

[0031]

[Table 2]

Note) LAS: straight-chain alkyl (C ₁₂ -C ₁₃ ) sodium benzenesulfonate AS: alkyl (C ₁₄ -C ₁₅ ) sodium sulfate Nonionic surfactant: polyoxyethylene (average addition mole of ethylene oxide) Formula 13) Alkyl (C ₁₂ -C ₁₃ ) ether ・ Soap; Sodium tallow (C ₁₆ -C ₁₈ ) fatty acid ・ Sodium polyacrylate; Average molecular weight = 10000 ・ B is an abbreviation of balance amount to make 100 as a whole is there

Continuation of the front page (56) References JP-A-6-248300 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C11D 3/33 C11D 3/20 C11D 17/06

Claims (3)

(57) [Claims] 1. A high-density granular detergent composition comprising the following components (a), (b) and (c) and having a bulk density of 0.6 to 1 g / cc. (a) 10 to 40% by weight of a surfactant (b) 1 to 20% by weight of a compound represented by the following general formula (1) (c) polyethylene glycol having an average molecular weight of 5,000 to 20,000
0.5-5% by weight 2. The high-density granular detergent composition according to claim 1, wherein at least two-thirds of the total surfactant is a sulfonate type and / or sulfate ester type anionic surfactant. 3. The method according to claim 1, further comprising:
The high-density granular detergent composition according to claim 1, wherein the composition comprises about 0.5% by weight.