JPH0249099A - Concentrated and high-density powdery detergent for clothes - Google Patents

Abstract

PURPOSE:To obtain the subject detergent, containing an alkyl sulfate salt, polyoxyethylene alkyl ether, soap and zeolite as essential components at a specific ratio, excellent in detergency and resistance to caking and rinsing and good in biodegradability. CONSTITUTION:The objective detergent, containing (A) 25-45wt.% alkyl sulfate salt, (B) 1-10wt.% polyoxyethylene alkyl ether, (C) 1-10wt.% soap and (D) 15-35wt.% zeolite as essential components and having 0.5-0.9g/cm<3> (preferably 0.6-0.8g/cm<3>) bulk specific density. The total amount of the components (A) to (C) is 30-50wt.% (preferably 35-45wt.%).

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a concentrated high-density laundry powder detergent, and more specifically, it is a concentrated type with a higher surfactant content than conventional powder detergents, and is portable. The present invention relates to a concentrated high-density laundry powder detergent that is compact and convenient for use, does not take up much space, is selected for its detergency, caking resistance, and rinsability, and has good biodegradability.

[Prior Art/Problems] Currently, about 90% of household laundry detergents are powder products. Most powder products are manufactured by slurrying detergent raw materials using spray equipment. Therefore, since the powder form is hollow granules, its bulk specific gravity is low, usually 0.2 to 0.
4 g/an3.

Further, the surfactant content of the powder product is usually in the range of 20 to 30% from the viewpoint of cost performance and production efficiency.

By the way, if you look at the floor plans of high-rise houses and single-family houses in urban areas in Japan in recent years, you will find that they do not take up much space in the plumbing area, especially in the laundry area, so bulky boxes of detergent are not preferred. There is a tendency.

In addition, large boxes are not only inconvenient for housewives to carry when shopping, but also cause problems for detergent suppliers, as logistics costs (shipping, warehouse fees, etc.) account for a large amount of detergent costs.

In addition, when using high bulk specific gravity Combact T/detergent,
Uses less per wash than traditional detergents. Therefore, in order to achieve the same performance as conventional detergents, it is necessary to devise a formulation composition. Generally, the type and amount of surfactant to be used are important because they have the greatest effect on cleaning performance. The amount of surfactant is higher than that of conventional detergents,
It has to be a so-called concentrated type, and in that case, among the powder physical properties, caking resistance is of particular concern. If concentrated detergent is left in a carton for a long time and the conditions (temperature, humidity) are harsh, it will solidify and form a block.

Furthermore, in recent years, there has been a demand for rationality in home laundry. In other words, economical and short-time washing is preferable. In this sense, ease of rinsing during washing is important.
From the viewpoint of saving water and shortening the rinsing time, there is a demand for products with good foam removal properties.

Furthermore, when washing liquid is released into rivers, environmental pollution such as foam pollution and the impact on fish has become a serious problem, and it is important that the surfactants used in detergents are highly biodegradable. It has been demanded.

Furthermore, conventional knowledge regarding high-density detergents can be found here and there in patent literature. For example, there are Japanese Patent Application Laid-open Nos. 61-69897 and 81-69898. However, the inventions described in these publications relate to methods for producing high-density granular detergents with improved fluidity, and do not mention the detergent's detergency, rinsability, or biodegradability. However, with the formulations shown in the Examples, these performances are not necessarily satisfactory.

[Means for Solving the Problems] The present invention has been completed as a result of intensive study on how to solve the various problems that arise when designing a high bulk specific gravity detergent as well as the demands for easy rinsing and easy biodegradability. reached.

That is, the present invention provides (a) an alkyl sulfate salt (hereinafter referred to as
725-45% by weight written as AS; (b) polyoxyethylene alkyl ether (hereinafter written as AE) 1
-10% by weight; (C) 1-10% by weight of soap; (d) 15-35% by weight of zeolite, and the total amount of (a) + (b) + (c) is 30% by weight. ~
50% by weight and a bulk specific gravity of 0.5 to 0.9 y/a
The present invention relates to a concentrated high-density laundry powder detergent characterized by having the following properties:

Function] The powder detergent of the present invention contains (a) AS25-4 as an essential component.
5% by weight, preferably 30-40% by weight, (b) AEI
~10% by weight, preferably 2-5% by weight, (c) Soap 1
~10% by weight, preferably 2-5% by weight, (d) zeolite 15-35% by weight, preferably 20-30% by weight, and (a) + (b) + (e) of the surfactant. The total amount is 30 to 50% by weight, preferably 35 to 45% by weight, and the bulk specific gravity is 0.5 to 0.9 ylc.
, preferably 0.6 to 0.8 g/Cm'. It is a concentrated high-density laundry powder detergent with excellent detergency, caking resistance, and rinsability, as well as good biodegradability.

Here, (a) AS used in the present invention has 10 to 2 carbon atoms.
It is made by sulfating two higher alcohols and then neutralizing them with caustic soda. Examples of higher alcohol raw materials include natural alcohols obtained by decomposing fats and oils such as coconut oil, palm kernel oil, palm oil, beef tallow, and fish oil, and synthetic alcohols such as Ziegler alcohol, oxo alcohol, and secondary alcohols.

Furthermore, AS is decomposed more quickly by microorganisms than linear alkylbenzene sulfonates, which are surfactants mainly included in commercially available detergents.

The amount of AS blended in the present invention is in the range of 25 to 45% by weight, preferably 30 to 40% by weight. AS is 25% by weight
If it is less than 45% by weight, sufficient cleaning performance cannot be achieved, and if it exceeds 45% by weight, it is disadvantageous in terms of product production efficiency and cost performance.

Further, (b) AE is a higher alcohol having 10 to 22 carbon atoms to which ethylene oxide is added. Raw materials for higher alcohols include coconut oil, palm kernel oil, palm oil,
Examples include natural alcohols obtained by decomposing fats and oils such as beef tallow and fish oil, and synthetic alcohols such as Ziegler alcohol, oxo alcohol, and secondary alcohols. Further, the number of ethylene oxide added moles is preferably in the range of 5 to 20 moles so that the cleaning performance can be sufficiently exhibited.

The amount of AE blended in the present invention is in the range of 1 to 10% by weight, preferably 2 to 5% by weight. If the AE content is less than 1% by weight, sufficient cleaning ability cannot be exhibited.

Moreover, if it exceeds 10% by weight, the product becomes sticky, has poor caking resistance, and has difficulty removing bubbles during rinsing.

(C) Soap is a higher fatty acid salt having 10 to 22 carbon atoms. Raw materials for soap include coconut oil, palm kernel oil, rice bran oil,
Natural fats and oils such as beef tallow, pork fat, soybean oil, rapeseed oil, and palm oil can be mentioned. Further, the corresponding alkali metal is sodium or potassium.

The amount of soap blended in the present invention is in the range of 1 to 10% by weight, preferably 2 to 5% by weight.If the amount of soap is less than 1% by weight, foam removal during rinsing will be poor. Further, even if the amount exceeds 10% by weight, the effect of removing bubbles is not significant.

(d) As the zeolite, synthetic zeolite A having a primary particle size of 1 μm or less is preferable from the viewpoint of cleaning performance.

The amount of zeolite blended in the present invention is 15 to 35% by weight,
Preferably it is in the range of 20 to 30% by weight. If the zeolite content is less than 15% by weight, sufficient cleaning performance cannot be achieved.
Moreover, if it exceeds 35% by weight, water becomes cloudy during rinsing, and rinsing takes time.

The bulk specific gravity of the concentrated high bulk specific gravity laundry powder detergent of the present invention is 0.5.
~0.9y/c+a', preferably 0.6-0.8g/
cm", and the bulk specific gravity is less than 0.5 g/ctm",
Compared to powdered detergent produced by conventional spray drying, the size of the product packaging box is not so small, making it bulky and difficult to use.Also, if the bulk specific gravity exceeds 0°9g7am3, the detergent particles become dense. This is not preferred because it becomes too hard and has poor low-temperature solubility during washing.

In the present invention, the above-mentioned three types of surfactants and zeolite are essential components, but other components can also be blended in order to improve the cleaning performance and powder physical properties. That is, as anionic surfactants, linear alkylbenzene sulfonates, polyoxyethylene alkyl sulfate salts, alkanesulfonate salts, α-olefin sulfonate salts, α-sulfo fatty acid ester salts, and acylated polypeptides are used as anionic surfactants. Examples of salts and amphoteric systems include alkyl betaines, imidazolium betaines, amino acid-based amphoteric surfactants, and nonionic systems include polyoxyethylene alkylphenol ethers, polypropylene glycol ethylene oxide adducts, fatty acid alkanolamides and their ethylene oxide adducts, and alkyl amine oxides. be able to.

Builders use sodium carbonate, sodium bicarbonate, and sodium silicate as alkaline agents, and sodium citrate, sodium malate, sodium gluconate, sodium nitrilotriacetate, sodium ethylenediaminetetraacetate, sodium diethylenetriaminepentaacetate, and polyacrylic acid as sequestering agents. Sodium, carboxymethyl cellulose, polyvinyl pyrrolidone, polyethylene glycol, polyvinyl alcohol as a re-staining preventive agent, and sodium chloride and sodium chloride as neutral salts. Other additives include enzymes (protease, amylase, lipase, cellulase), bleach (
Sodium percarbonate, sodium perborate), fragrances, and optical brighteners can be added.

Next, the method for manufacturing the powder detergent of the present invention will be described. The following two methods can be cited for its manufacturing method.

The first method is to knead a surfactant and a builder in a kneader. That is, an aqueous solution or powder of a surfactant and various builders are uniformly kneaded in a kneader. If it is necessary to adjust the moisture content of the final product, mix while heating to evaporate the moisture.

Thereafter, the aggregated grains are removed using a sieve with a desired opening.

The second method is to use a spray detergent as a raw material and granulate it in the presence of a suitable binder. The granulator is basically a vertical or horizontal transfer granulator having a rotary axis in the vertical or horizontal direction and blades capable of high-speed rotation.

Specific names of vertical granulators include high-speed mixer (manufactured by Fukae Kogyo), Henschel mixer (manufactured by Mitsui Miike Koki),
Flexomics (manufactured by Fuji Sangyo) can be mentioned. In addition, horizontal granulators such as Loedige Mixer (manufactured by Loedige) and Spartan Reuser (manufactured by Fuji Paudal) are also available.
can be mentioned.

Water, nonionic surfactants, and polyethylene glycol are effective binders.

When a spray detergent is charged into the granulator, a binder is added, and the machine is rotated, the detergent is pulverized and granulated by the force of the binder, yielding a detergent with a high bulk specific gravity. The degree of granulation can be controlled by the rotation speed, rotation time, temperature, and type and amount of binder. In addition, after granulation, powdered zeolite is added as a surface modifier in an amount of 2 to 10% by weight based on the spray detergent.
By adding and mixing, the caking resistance of the detergent is improved.

By removing the coarse particles in the granulated product using a sieve with a desired opening, a product, the concentrated high-density laundry powder detergent of the present invention, is obtained. After this, it is also possible to add fragrances, enzymes and bleaching agents in a suitable powder mixer.

[Example] The present invention will be described in detail with reference to Examples below, and the experimental conditions in each Example are as follows.

(1) Cleaning power [Cleaning conditions] - Contaminated cloth: A gold cloth (11 cm x 24 am) was attached to the collar of work clothes, worn for 7 days, then removed and used as a contaminated cloth.

・Prepare an auxiliary cloth two-line towel lk, and set the bath ratio to 1:3°.

・Amount of detergent: 40g (JIS index detergent), 25g (detergent of Examples and Comparative Examples) ・Amount of water: Tap water 301 ・Washing = 25℃, 10 minutes in a home electric washing machine (manufactured by Toshiba:
After that, rinse only the contaminated cloth with water 301 at 25° C. for 3 minutes, and dehydrate for another 30 seconds.

[Cleaning power measurement method] As described in JIS K-3371, 15 contaminated cloths are prepared for each combination, and if the dirt is almost completely removed...5 points, the dirt is almost removed. If not, evaluate as 1 point in 5 stages of 1, 2, 3, 4, 5, calculate the total evaluation score of 15 contaminated cloths, and
It was expressed as an index when the evaluation score by the index detergent was set as 100.

(2) Caking resistance [Method] - Vinyl chloride vibrator divided into two vertically (inner diameter 5cm)
, length 6cIIl) with a rubber band.

-Pour 90cc of detergent into this, place a rubber stopper about the same size as the inside diameter of the pipe, and then place a weight on top. The total weight of the rubber stopper and weight is 1 kg.

・After leaving it in this state for 2 minutes, remove the rubber stopper and weight, and gently cut the rubber band.

[Evaluation] A vinyl chloride container (RA0fI) was placed on top of the cylindrical detergent cake, and an iron ball (8 g) was placed in the container.
) was placed on the cake one by one, and the weight when the cake collapsed was measured.

(3) Rinseability: Pour 30 N of water (<25°C) into a household washing machine, add detergent 2
Add 5g and 1kg of cotton towel and stir for 10 minutes.

・Take out the towel and soak it in water until the squeezing rate is 120%.

・Rinse the towel with water (301<25℃) for 3 minutes.

・Hydrophilic (squeezing rate 120%).

- Rinse the towel with water 301 (25°C) for 3 minutes.

[Evaluation] After the second rinse was completed, the occupied area (%) of bubbles was visually determined.

(4) The test was carried out using a coulometer (manufactured by Daikane Electric Co., Ltd.) in accordance with the conditions specified in the Biodegradability Control Law. Activated sludge was inoculated into an aqueous solution of the test substance and cultured for 14 days with stirring at 25°C.
The degree of decomposition (%) was determined using the following formula: SA: residual amount (ny) of the test substance after completion of the decomposition test.

SB: The residual amount (my) of the test substance in a blank test in which only the test substance was added to water.

Note that both the residual amounts sA and sB were measured using TOC (total organic carbon content) values.

12 and 4 12 4 The detergent was prepared as follows.

A detergent containing AS, soap, zeolite, sodium carbonate, sodium silicate, and polyethylene glycol in the formulation shown in Table 1 was spray-dried. However, some of the zeolite and water were added in the next granulation step. The bulk specific gravity of the obtained r@mist detergent was in the range of 0.15 to 0.25. Put this spray detergent into a high speed mixer,
It was granulated by adding 1% water and AE as a binder. After granulation, powdered zeolite (manufactured by Mizusawa Chemical Co., Ltd.: Silton B) was added to
% and mixed. After removing coarse particles using a 14-mesh sieve, enzymes were blended using Kenmix Aiko (manufactured by Aikogo Seisakusho).

Futachi and Knee L Comparison 1 - Add AS (28% powder aqueous solution), AE, soap, zeolite, sodium carbonate, sodium silicate, and polyethylene glycol to Niegu and mix while heating the jacket with steam and volatilizing the water. I don't know.

After reaching the shaking moisture level, coarse particles were removed using a 14-mesh sieve. Next, using Kenmix Aiko, 5% powdered zeolite and enzymes were blended into the granules, and a detergent containing soap, zeolite, sodium carbonate, sodium silicate, and polyethylene glycol was spray-dried. However, some of the zeolite was added in the next granulation process. The bulk specific gravity of the obtained spray detergent is 0.15
It was in the range of ~0.25. This sprayed detergent was placed in a Loedige mixer, and AE was added as a binder to granulate it. After granulation, 5% of powdered zeolite (Sil 1-B, manufactured by Mizusawa Chemical Co., Ltd.) was added and mixed. After removing coarse particles using a 14-mesh/7-mesh sieve, enzymes were blended using Kenmix Aiko.

The following can be seen from the results listed in Table 1.

The bulk specific gravity of any of the detergents in Examples 1 to 6 is high.

In addition, the cleaning power was superior to that of JIS index detergents. Furthermore, the caking resistance and rinsability of these detergents were good.

On the other hand, when the total amount of surfactants was small (Comparative Example 1) or when the amount of zeolite was small (Comparative Example 2), the detergency was poor. When the amount of AE was large (Comparative Example 3), the bulk specific gravity and detergency were satisfactory, but
Caking resistance and rinsability were poor. In addition, when no soap was blended (Comparative Example 4), the rinsability was poor. ).

[Effects of the Invention] The concentrated high-density laundry powder detergent of the present invention is a concentrated type with a higher surfactant content than conventional powder detergents, and is compact and has a high specific gravity that is convenient to carry and does not take up much space. It is selected for its detergency, caking resistance, and rinsability, and has good biodegradability.

Patent applicant: Asahi Denka Kogyo Co., Ltd. Same as above Coop Clean Co., Ltd.

Claims (1)

[Scope of Claims] (a) 25 to 45% by weight of alkyl sulfate; (b)
) Polyoxyethylene alkyl ether 1-10% by weight
(c) contains 1-10% by weight of soap; (d) 15-35% by weight of zeolite as an essential component; (a) + (b) + (c
) is 30 to 50% by weight, and the bulk specific gravity is 0.
．． A concentrated high-density laundry powder detergent characterized by having a concentration of 5 to 0.9 g/cm^3.