JP2001152198A - High bulk density detergent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high bulk density detergent capable of imparting excellent finished whiteness to clothes after repeated washing. SOLUTION: This high bulk density detergent comprises (A) an anionic surfactant, (B) an adduct of an alkylene oxide in an average of 1-10 moles to a higher alcohol, (C) a fluorescent brightener and (D) a hydrogen carbonate each in a specific ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high bulk density detergent.

[0002]

2. Description of the Related Art Granular detergent compositions are strongly directed to higher bulk densities and lower usage amounts from the convenience of consumers. In addition, consumers are particularly conscious of the evaluation of the finish of washing by sebum stains on collars and sleeves, and yellowing due to accumulation of oxidation and decomposition of sebum remaining during washing. As a composition of a high bulk density detergent, there has been known a composition containing an anionic surfactant, a nonionic surfactant, and a builder together with a fluorescent whitening agent. However, for example, Japanese Patent Laid-Open No.
No. 96 and Japanese Patent Application Laid-Open No. 1-1121400 failed to provide a sufficient detergency. Further, the composition described in JP-A-3-269099 is said to be capable of suppressing the deterioration of the finished whiteness of clothes due to repeated washing and wearing, but the effect was not sufficient.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a high bulk density detergent which is excellent in the finished whiteness of clothes even after repeated wearing and washing.

[0004]

According to the present invention, there are provided (A) 5 to 35% by weight of an anionic surfactant, (B) 1 to 25% by weight of an average alkylene oxide adduct of a higher alcohol, 1 to 25% by weight, and (C) A.) A high bulk density detergent containing 0.01 to 0.5% by weight of an optical brightener and (D) 1 to 20% by weight of hydrogencarbonate;

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Component (A) Examples of the anionic surfactant of the component (A) include sulfates of higher alcohols, sulfates of ethoxylated higher alcohols, alkylbenzene sulfonates, and the like.
Examples thereof include a paraffin sulfonate, an α-olefin sulfonate, an α-sulfofatty acid salt or an ester salt thereof, and a fatty acid salt. In particular, when the carbon number of the alkyl chain is 1
A linear alkylbenzene sulfonate having 0 to 18 (preferably 12 to 14) or an α-sulfofatty acid alkyl ester salt having an alkyl chain having 10 to 20 carbon atoms is preferable. Examples of the counter ion include an alkali metal, an alkaline earth metal, ammonia, and an alkanolamine.
From the viewpoint of adjusting the dissolution rate, it is also preferable to use potassium ions in combination. The anionic surfactant is incorporated in the high bulk density detergent in an amount of 5 to 35% by weight, preferably 10 to 30% by weight, and particularly preferably 15 to 30% by weight.

Component (B) Examples of the component (B) include higher alcohol ethylene oxide (hereinafter referred to as “EO”) adducts and EO / propylene oxide (hereinafter referred to as “PO”) adducts. In particular, an adduct of an alcohol having 10 to 16 carbon atoms with an average of 1 to 10 moles of EO is preferable in terms of removing sebum stains, hard water resistance, biodegradability, and compatibility with a linear alkylbenzene sulfonate. The component (B) is preferably contained in a high bulk density detergent in an amount of 0.5 to 25% by weight, more preferably 0.5 to 20% by weight, particularly preferably 1 to 15% by weight.

In the present invention, the weight ratio of component (A) / component (B) is preferably (A) / (B) = 100/1 to 1/1.
2, more preferably 60/1 to 1/2, still more preferably 40/1 to 1/1, particularly preferably 20/1 to 2/1.

Component (C) The fluorescent whitening agent (C) is contained in a high bulk density detergent in an amount of 0.01 to 5% by weight, preferably 0.02 to 0.2% by weight, more preferably 0.03 to 0% by weight. .15% by weight, particularly preferably 0.0
The content is 5 to 0.1% by weight. As (C), one or more types selected from the following formulas (I) to (IV) are preferable.

[0009]

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[0010]

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[0011]

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[0012]

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Wherein X and X ′ are the same or different and each represent a hydrogen atom, a methyl group, an ethyl group or a nitro group. Here, X and X ′ in the above formulas (I), (III) and (IV) each represent a hydrogen atom, and X and X ′ in the above formula (II) represent a hydrogen atom or a methyl group (particularly, ortho position). preferable.

Component (D) Examples of the hydrogencarbonate (D) include sodium hydrogencarbonate and potassium hydrogencarbonate. (D) component is 1-20 weight% in a high bulk density detergent, Preferably it is 2-15 weight%,
More preferably, the content is 3 to 10% by weight.

(Others) The high bulk density detergent of the present invention includes nonionic surfactants other than the component (B) such as fatty acid alkanolamides and alkyl polyglycosides, amphoteric surfactants, and cationic surfactants. Surfactants can be added. Further, the content of the phosphorus compound is 0 to 1.1% by weight as a phosphorus atom, and more preferably 0 to 0.
It is preferably 8% by weight, especially 0 to 0.5% by weight.

Furthermore, builders (carbonates, silicates, polycarboxylates, etc.), bleaching agents (percarbonates, perborates, bleach activators, etc.), recontamination, which are known in the field of clothing detergents An inhibitor (such as carboxymethylcellulose), a softening agent, a reducing agent (such as sulfite), a foam inhibitor (such as silicone), and a fragrance can be contained.

The surface may be modified from the viewpoint of the fluidity and non-caking properties of the detergent particles. As the surface coating agent, for example, bentonite, talc, clay, metal soap, fine powders such as powdered surfactant, carboxymethylcellulose, polyethylene glycol, polyacrylic acid or a salt thereof, a copolymer of acrylic acid and maleic acid or a salt thereof And water-soluble polymers such as polycarboxylates, and fatty acids.

(Production method) The high bulk density detergent of the present invention is disclosed in JP-A-61-69897 and JP-A-61-69899.
JP, JP-A-61-69900, JP-A-5-269
It can be produced by the methods described in JP-A-09200 and DE19529298. Furthermore, as a method for obtaining a detergent having a higher bulk density, the method described in International Publication WO95 / 26394 can be referred to. To further illustrate, the main component excluding a part of the water-insoluble inorganic material is kneaded and mixed using a continuous kneader, and the obtained kneaded material and the remaining water-insoluble inorganic material are put into a pulverizer and pulverized. Can be obtained. Then, the obtained detergent particles are sieved to obtain detergent particles having a predetermined average particle size distribution. Preferred examples of the continuous kneader include KRC2 type manufactured by Kurimoto Iron Works, and DKASO6 type manufactured by Hosokawa Micron as a pulverizer. Further, as another method, for example, it can be obtained by slurrying the main component excluding a part of the water-insoluble inorganic substance and the like, and granulating the slurry with particles obtained by spray drying and a binder substance. . The obtained detergent particles are sieved and, if necessary, crushed to obtain detergent particles having a predetermined average particle size distribution.

(Physical Properties) The bulk density of the high bulk density detergent of the present invention is 500 to 1200 g / L, and further 600 to 1000 g.
/ L, particularly preferably 700 to 900 g / L. This bulk density is measured by the method of JISK 3362.

The average particle diameter of the high bulk density detergent of the present invention is preferably 150 to 800 μm, more preferably 200 to 700 μm, and particularly preferably 250 to 650 μm. This average particle size is
It was determined from the weight fraction based on the sieve size after vibrating for 5 minutes using a standard sieve of JIS Z8801.

[0021]

<Example 1> Of the components of Example 1 shown in Table 1, sodium carbonate, sodium hydrogen carbonate, sodium sulfite, and a fluorescent brightener were used in a Loedige mixer FKM-130.
D (Matsubo Co., Ltd.) using a stirring blade having a peripheral speed of 3.4.
m / s, and the mixing speed was 1 minute at a peripheral speed of a shearing machine of 27 m / s. While operating the mixer under the same conditions, a mixture of linear alkyl (C12-14) benzenesulfonic acid (water content 0.5%) and sulfuric acid was added in 4 minutes, and the mixture was further operated for 5 minutes to carry out the neutralization reaction. went. Next, while operating the mixer under the same conditions, the nonionic surfactant (1) and 11% by weight of zeolite were added, and the mixture was operated for 2 minutes to perform granulation.

Next, while operating the mixer under the same conditions, 5% by weight of zeolite was added, and a 40% by weight aqueous solution of polyethylene glycol (PEG 13000) and acrylic acid / maleic acid copolymer (AA / MA copolymer) was added for 1 minute. It was further operated for 2 minutes to perform granulation. Subsequently, 5% by weight of zeolite was added, and the surface modification treatment was performed by further operating for 2 minutes, and the particles were passed through a 2000 μm sieve to obtain high bulk density detergent particles. Next, using a rotating drum, the remaining zeolite, enzyme and fragrance were mixed with the detergent particles to obtain 35 kg of a high bulk density detergent having the final composition shown in Table 1.

<Example 2> Of the components of Example 2 shown in Table 1, 15% by weight of zeolite and 1% of sodium carbonate
A slurry having a solid content of 50% by weight was prepared from the components excluding 3% by weight, sodium bicarbonate, flavor and enzyme, and spray-dried to obtain a spray-dried composition. This is the zeolite 5
The weight percent and the 13 weight percent sodium carbonate were charged into a ribbon mixer and mixed. The obtained mixture was extruded into a cylindrical shape having a diameter of 10 mm by a pre-extrusion type twin-screw extrusion granulator (pelleter double: manufactured by Fuji Paudal Co., Ltd.) and compacted. The obtained pellets were pulverized and granulated with a flash mill (manufactured by Fuji Paudal Co., Ltd.) together with 5% by weight of zeolite in the total detergent composition to perform surface coating. Detergent particles were obtained. Thereafter, the mixture was transferred to a V blender, and the remaining zeolite, sodium hydrogen carbonate, enzyme and fragrance were mixed to obtain a high bulk density detergent.

<Example 3> Of the components of Example 3 shown in Table 1, 4% by weight of nonionic surfactant (1), 15% by weight of zeolite, and 4% by weight of sodium hydrogen carbonate
Content, components other than fragrances and enzymes, solid content 50% by weight
A slurry was prepared and spray dried to obtain spray dried particles. Next, this was put into a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.) together with 5% by weight of zeolite, and pulverized while spraying 2% by weight of nonionic surfactant (1) to perform stirring granulation. Was. After granulation, 5% by weight of zeolite was added, and the mixture was stirred to coat the surface of the granulated particles, and passed through a 2000 μm sieve to obtain high bulk density detergent particles. Next, the mixture was transferred to a V blender, and the remaining zeolite, 4% by weight of sodium hydrogen carbonate, an enzyme and a fragrance were mixed to obtain a high bulk density detergent.

<Comparative Examples 1-2> In the same manner as in Example 1,
A high bulk density detergent having the composition shown in Table 1 was obtained.

<Evaluation of Performance> The high bulk density detergents obtained in Examples and Comparative Examples were evaluated as follows. Table 1 shows the results.

[Average particle size] Standard sieve according to JIS Z 8801 (mesh size 125, 177, 200, 350, 500,
710, 1000, 1410, 2000 μm) using a low tap machine (HEIKO SEISAKU)
SHO, tapping 156 times / min, rolling 290
After the sample of 100 g was vibrated for 5 minutes at the same time, the median diameter was calculated from the weight fraction based on the sieve size.

[Bulk density] The bulk density was measured by a method specified in JIS K 3362.

[Whiteness after washing] Cotton / polyester = 50
After wearing a / 50 white shirt for one day, washing was performed using a high bulk density detergent. Washing was performed in a washing machine at 5 ° DH, 60 L of water at a temperature of 15 ° C, 40 g of a detergent composition, and a bath ratio of 20:
1. One of the above-mentioned shirts and a cotton knitted shirt worn for one day were put in, washed for 10 minutes and dehydrated for 1 minute. Then, rinsing for 3 minutes with water at 5 ° DH and 15 ° C. and dehydration for 1 minute were repeated twice. Thereafter, the shirt was air-dried overnight in a room to dry.

The shirt which was repeatedly worn and washed 30 times by the above operation and the shirt of the same fabric which was repeatedly washed and dried 30 times without wearing were compared with the naked eye and worn. The degree of deterioration of the finished whiteness of the shirt was evaluated as an average value of five shirts.

[0031]

[Table 1]

Here, LAS-Na is linear alkyl (C.sub.12-14) sodium benzenesulfonate, LAS-Na
SK is straight-chain alkyl (12 to 14 carbon atoms) benzene sulfonate, AOS-K is α-olefin (14 to 18 carbon atoms) potassium sulfonate, and AS-Na is alkyl (12 to 16 carbon atoms) sulfuric acid. Sodium. The nonionic surfactant (1) is polyoxyethylene (average EO mole number 7) alkyl (C12-14) ether, and the nonionic surfactant (2) is polyoxyethylene (average EO mole number 6) Polyoxypropylene (PO
Average addition mole number 3) alkyl (C12-14) ether, non-ionic surfactant (3) is polyoxyethylene (EO average addition mole number 15) alkyl (C12-12
4) Ether. AA / MA copolymer is acrylic acid-maleic acid copolymer is sodium salt (70 mol%
Neutralization), and the monomer ratio is acrylic acid / maleic acid =
3/7 (molar ratio), average molecular weight 70000. Optical brighteners are Tinopearl CBS-X and Tinopearl AMS-G
X (manufactured by Ciba Specialty Chemicals) weight ratio 1 /
One mixture was used. As the zeolite, a 4A zeolite having an average particle size of 3 μm (manufactured by Tosoh Corporation) was used. The enzyme is
A mixture of Cellulase K (described in JP-A-63-264699) and Lipolase 100T (manufactured by Novo) in a weight ratio of 3: 1 was used.

Continued on the front page F term (reference) 4H003 AB03 AB15 AB19 AB27 AB44 AC08 AC23 BA10 CA20 DA01 EA12 EA15 EA16 EA28 EB22 EB30 EB36 EC01 EC03 ED02 FA09

Claims (2)

[Claims] (A) 5-35% by weight of an anionic surfactant, (B) an average of 1 alkylene oxide of a higher alcohol.
1 to 25% by weight of (C) 0.01 to 0.5% by weight of an optical brightener and (D) 1 to 20 of hydrogen carbonate
High bulk density detergent containing wt%. 2. The high bulk density detergent according to claim 1, wherein the component (C) is at least one selected from the following formulas (I) to (IV). Embedded image Embedded image Embedded image Embedded image [Wherein X and X ′ are the same or different and are each a hydrogen atom,
Represents a methyl group, an ethyl group or a nitro group. ]