JP2005075969A - Powdered detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powdered detergent composition which displays an excellent cleaning effect on an obstinate stain caused by bilirubin etc., characteristic of baby clothes and other every kind of common stains of clothes caused by foods such as fat and oil and protein etc., sebum dirt and mud, and is excellent in usability such as solubility and non-solidifying character etc., and powder stability. <P>SOLUTION: The powdered detergent composition contains (A) a composite of a higher fatty acid salt and an inorganic salt, (B) a nonionic surface active agent, (C) an organic chelating agent and (D) an alkali agent, wherein at least 40 mass% of the higher fatty acid salt is an unsaturated one. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a powdery detergent composition, for example, a powdery detergent composition that can be suitably used for washing baby clothes and the like.

Baby clothes such as urine and trousers worn by newborns and infants are heavily contaminated with excrement such as urine and feces, and form extremely stubbornness that contains yellow components such as bilirubin, a hemoglobin degradation product. .
Such baby clothes-specific stains are difficult to remove with ordinary detergents for sebum stains and mud stains. Granular detergents have been developed.

Conventionally, as a base material for cleaning having excellent cleaning properties such as bilirubin, which has been widely used, fatty acid soap can be mentioned.
However, fatty acid soaps are known not only to have low solubility in water, but also to form insoluble salt (soap scum) with polyvalent metals such as calcium and magnesium contained in tap water. Since the formation of this insoluble salt (soap scum) impairs the active ingredients that contribute to cleaning, it is necessary to use a large amount of soap in order to exert a sufficient cleaning effect, which is economically disadvantageous. In addition, there is a problem that the insoluble salt adheres to the object to be cleaned.

  Therefore, in order to solve these problems, a powdery cleaning agent containing an aminopolycarboxylate and a nonionic surfactant as main components without using any fatty acid salt (Patent Document 1: JP-A-9-302390) And a granular detergent that improves the solubility and handling properties of fatty acid soap by combining a fatty acid soap surfactant and an ionic surfactant (Patent Document 2: JP 06-136398 A, Patent Document 3: Japanese Patent Laid-Open No. 11-80798) has been proposed.

JP-A-9-302390 (Claims, Examples, etc.) JP-A-6-136398 (Claims, Examples, etc.) Japanese Patent Laid-Open No. 11-80798 (Claims, Examples, etc.)

  However, in the powder detergent of Patent Document 1, it is necessary to use a large amount of an inorganic substance such as silicate that is insoluble in water in order to prevent exudation of the nonionic surfactant and maintain the powder stability. For this reason, there are concerns about the adhesion of this inorganic material to the laundry or the accumulation in the washing machine. In addition, special processing needs to be performed on the packaging container, which remains an economic problem. On the other hand, the cleaning agents described in Patent Documents 2 and 3 are still unsatisfactory in the cleaning power against dirt peculiar to baby clothing and the solubility during use, and the solidification property of the cleaning agent itself is unknown.

  The present invention has been made in view of such circumstances, and the usual stubbornness of baby clothing formed of bilirubin or the like, food stains such as fats and oils, and sebum stains and mud stains. An object of the present invention is to provide a powdery detergent composition that exhibits an excellent cleaning effect against any dirt on clothes and has excellent usability such as solubility and non-solidification property and powder stability. To do.

  As a result of intensive studies to solve the above problems, the present inventors have obtained a powder comprising a combination of a specific higher fatty acid salt and an inorganic salt, an organic chelating agent, a nonionic surfactant and an alkali agent. Any of the stubbornness peculiar to baby clothes formed by urine or fecal bilirubin, food stains such as fats and oils, and stains attached to normal clothes such as sebum stains and mud stains In addition, the present invention has been completed by finding that it exhibits an excellent cleaning effect, as well as excellent usability such as solubility and non-solidification, and powder stability.

  That is, the present invention includes (A) a composite of a higher fatty acid salt and an inorganic salt, (B) a nonionic surfactant, (C) an organic chelating agent and (D) an alkali agent, Provided is a powdery detergent composition characterized in that at least% is an unsaturated higher fatty acid salt.

  According to the present invention, both stubborn stains unique to baby clothes formed of bilirubin and the like, food stains such as fats and oils, and stains attached to normal clothes such as sebum stains and mud stains In addition, it is possible to provide a powdery detergent composition that exhibits an excellent cleaning effect, and has excellent usability such as solubility and non-solidification property and powder stability.

The powdery detergent composition according to the present invention comprises (A) a composite of a higher fatty acid salt and an inorganic salt, (B) a nonionic surfactant, (C) an organic chelating agent, and (D) an alkali agent, More than 40% by mass of the higher fatty acid salt is an unsaturated higher fatty acid salt.
In the present invention, (A) a composite of a higher fatty acid salt and an inorganic salt means a mixture obtained by mixing a higher fatty acid salt and an inorganic salt and combining them together. The production method of the composite is not particularly limited. For example, a method of producing a composite by mixing an inorganic salt with a slurry of a higher fatty acid salt prepared in advance and spray drying, or a higher fatty acid. A method of producing a composite by mixing a salt and an inorganic salt, slurrying the slurry, drying it, and then crushing it can be employed.

  In this case, the mixing ratio of the inorganic salt to the higher fatty acid salt is not particularly limited, but is preferably in the range of 10 to 50% by mass. If the mixing ratio of the inorganic salt is less than 10% by mass, the solubility and non-solidification property of the cleaning composition may be reduced. On the other hand, if the mixing ratio exceeds 50% by mass, the effect can be further improved. Not only that, but there is a risk that it may be disadvantageous in terms of cost.

(A) Although the compounding quantity to the cleaning composition of the composite of a higher fatty acid salt and an inorganic salt is not specifically limited, It is preferable to mix | blend 1-20 mass% in a cleaning composition. More preferably, 5 to 15% by mass is blended. If the compounding amount of this composite is less than 1% by mass, the target detergency may be insufficient. If it exceeds 20% by mass, not only will the solubility be reduced, but the occurrence of soap scum will increase. This may adhere to the object to be cleaned.
In addition, although the reason for improving the solubility of the detergent composition containing this by using the composite of (A) the higher fatty acid salt and the inorganic salt of the present invention is not clear, the powdery detergent composition in water Ionization of higher fatty acid salts to prevent aggregation due to fusion between higher fatty acid salts or higher fatty acid salts and other components such as nonionic surfactants, and locally become strong alkali. It is presumed that this is caused by the increased solubility in water.

  As the higher fatty acid salt, the distribution of the number of carbons is not limited as long as the higher fatty acid salt contains an unsaturated fatty acid salt of 40% by mass or more, preferably 50% by mass or more. A fatty acid having 22 linear or branched chains can be suitably used. In this case, if the content of the unsaturated fatty acid salt is less than 40% by mass, there is a high possibility that the solubility of the cleaning composition is lowered.

The saturated fatty acid salt constituting the higher fatty acid salt is not particularly limited, and examples thereof include sodium laurate, sodium myristate, sodium palmitate, sodium stearate, potassium stearate, and sodium behenate.
On the other hand, the unsaturated fatty acid salt is not particularly limited, and examples thereof include sodium oleate, sodium linoleate, and sodium linolenate.
These saturated fatty acid salts and unsaturated fatty acid salts can be used singly or as a mixture of two or more.
In addition, if a naturally derived fatty acid salt containing a fatty acid having an unsaturated bond is used, the blending process can be made more efficient, for example, beef tallow fatty acid, palm oil fatty acid, coconut oil fatty acid, rapeseed oil fatty acid, soybean oil fatty acid, etc. Thus, the intended cleaning composition may be obtained.

  As the inorganic salt, it can be used by appropriately selecting from known inorganic salts usually used for cleaning compositions, and for example, a builder such as carbonate, silicate, sulfate, etc. can be suitably used. Specifically, sodium carbonate, sodium silicate, sodium aluminosilicate, etc. are mentioned, These can be used individually by 1 type or in combination of 2 or more types. In particular, it is preferable to use an inorganic salt mainly composed of sodium carbonate, which is a water-soluble inorganic salt. Here, a main component means the component which occupies 50 mass% or more in inorganic salt.

(B) The nonionic surfactant can be appropriately selected from known various nonionic surfactants, and examples thereof include polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene polyoxy Examples include propylene alkyl or alkenyl ethers, polyoxyalkylene glycol fatty acid esters, and alkylamine ethylene oxide adducts. Among these, from the viewpoint of improving the solubility and detergency of the detergent composition, it has a linear or branched chain having 8 to 22 carbon atoms, particularly 8 to 18 carbon atoms as a hydrophobic group, and an average of ethylene oxide or propylene oxide. A nonionic surfactant having an addition mole number of 5 to 20, particularly 6 to 15 can be suitably used.

  (B) Although the compounding quantity in the cleaning composition of a nonionic surfactant is not specifically limited, It is preferable to mix | blend 1-15 mass% in a cleaning composition, and 3-10 mass. % Is more preferable. When the blending amount of the nonionic surfactant is less than 1% by mass, the cleaning power of the detergent composition may be reduced. On the other hand, when the amount exceeds 15% by mass, the powder stability is impaired, resulting in the detergent composition. There is a possibility that problems such as easy solidification of the product and a nonionic surfactant ooze out into the carton for storing the cleaning composition.

  (C) The organic chelating agent is not particularly limited, and can be appropriately selected from known various organic chelating agents. For example, trisodium citrate, sodium gluconate, ethylenediaminetetraacetic acid (EDTA) ) Disodium, ethylenediaminetetraacetic acid (EDTA) tetrasodium, diethylenetriaminepentaacetic acid (DTPA) pentasodium, nitrilotriacetic acid (NTA) trisodium, and the like. These may be used alone or in combination of two or more. can do. Among them, ethylenediaminetetraacetate is particularly preferable from the viewpoint of enhancing the cleaning power against stool stain, and ethylenediaminetetraacetic acid (EDTA) tetrasodium is more preferable. These chelating agents can also be used in the form of hydrates.

  (C) Although the compounding quantity in the cleaning composition of an organic chelating agent is not specifically limited, It is preferable to mix | blend 10-60 mass% in a cleaning composition, 15-50 mass% mixing | blending More preferably. If the blending amount of the organic chelating agent is less than 10% by mass, the cleaning power of the detergent composition to which it is added may be insufficient. On the other hand, if it exceeds 60% by mass, the cleaning power commensurate with the blending amount is obtained. The improvement effect is not obtained, and it becomes economically disadvantageous.

(D) The alkali agent is not particularly limited, and various compounds that show alkalinity and are generally used for cleaning agents can be used, such as sodium carbonate, sodium silicate, sodium aluminosilicate, Sodium bicarbonate or the like can be used, but it is particularly preferable to use sodium carbonate from the viewpoint of excellent solubility. As sodium carbonate, light ash and granular ash can be used, and it is preferable to use each in combination in the range of 1/9 to 9/1.
(D) Although the compounding quantity to the cleaning composition of an alkali agent is not specifically limited, It is preferable to mix | blend 20-80 mass% in a cleaning composition, 30-70 mass% is mix | blended. It is more preferable. When the blending amount of the alkaline agent is less than 20% by mass, there is a risk that the cleaning power of the cleaning composition to which the alkaline agent is added may be insufficient, and the powder stability is likely to be lowered. On the other hand, if it exceeds 80% by mass, the content of the surfactant is reduced, and as a result, the usage amount of the cleaning composition must be increased, which may be disadvantageous in terms of cost.

In addition, the powdery cleaning composition of the present invention may contain an additive generally used in granular or powdery cleaning agents as an optional component. For example, inorganic substances such as sodium sulfate, enzymes, enzyme stabilizers, preservatives, antibacterial agents, fluorescent agents, dyes, fragrances and the like can be blended.
These blending amounts are arbitrary as long as they do not deteriorate the performance of the powdery detergent composition. For example, they can be blended in an amount of 0.01 to 50% by mass with respect to the detergent composition.

  The powdery detergent composition of the present invention described above can be produced by various methods capable of uniformly mixing the components (A) to (D) and, if necessary, optional components. The mixing method and blending order are not particularly limited, but in particular, (B) a nonionic surfactant is sprayed and impregnated into an intermediate mixture containing (C) an organic chelating agent and (D) an alkali carbonate, After mixing, when (A) a composite of a higher fatty acid salt and an inorganic salt is blended and manufactured, the powder stability of the resulting detergent composition can be made more excellent. In addition, B * D of the powdery cleaning composition of this invention is about 0.4-0.9 g / ml.

  In addition, the concentration of the cleaning agent component in the cleaning liquid in the case of using the powdery cleaning composition of the present invention may be any concentration that can exert a cleaning effect. It is preferable to set the content to 01 to 1% by mass, and it is particularly preferable to set the content to 0.05 to 3% by mass in the case where cleaning is performed after the application. In addition, the powdery detergent composition of the present invention exhibits a high detergency even at a low concentration of about 0.05 to 0.1% by mass.

  EXAMPLES Hereinafter, although a manufacture example, an Example, and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to the following Example.

[Production Example 1]
Into an aqueous slurry containing 70% by mass of higher fatty acid sodium (carbon number of fatty acid: saturated C8 to C14: 10% by mass, saturated C16 to C22: 25% by mass, unsaturated C16 to C22: 65% by mass), an inorganic salt ( Sodium carbonate 90% by mass, sodium silicate 10% by mass) is added so that the mass ratio of higher fatty acid sodium / inorganic salt is approximately 70/30 in terms of solid content, sufficiently heated and mixed, and then spray spray dried to obtain higher fatty acid. A composite (A-1) of sodium and an inorganic salt was obtained.

[Comparative Production Example 1]
A spray-dried product (A-2) of higher fatty acid sodium was obtained in the same manner as in Production Example 1 except that no inorganic salt was added.

[Comparative Production Example 2]
Higher fatty acids in the same manner as in Production Example 1 except that higher fatty acid sodium having an alkyl distribution of saturated C8 to C14: 30% by mass, saturated C16 to C22: 60% by mass, and unsaturated C16 to C22: 10% by mass is used. A composite (A-3) of sodium and an inorganic salt was obtained.

[Examples 1-5 and Comparative Examples 1-6]
A predetermined amount of (A) a compound of higher fatty acid salt and inorganic salt, (C) an organic chelating agent, and (D) an alkali agent shown in Table 1 in a ribbon mixer having a volume of 7 L so that the final amount is 3 kg. After charging, preliminary stirring was performed for about 3 minutes. Next, in this mixture, (B) nonionic surfactant shown in Table 1 (in the case where the nonionic surfactant is solid at normal temperature, heated to 50 ° C. and dissolved) was used. Spray sprayed for 10-20 minutes. (B) After the spray addition of the nonionic surfactant was completed, an enzyme (protease) was added, and the mixture was further stirred for about 5 minutes to obtain a uniform powdery detergent composition.

[Examples 6 and 7]
A predetermined amount of (C) the organic chelating agent and (D) the alkali agent shown in Table 1 was charged in a 7 L capacity ribbon mixer so that the final finished amount would be 3 kg, followed by pre-stirring for about 3 minutes. Next, in this mixture, (B) nonionic surfactant shown in Table 1 (in the case where the nonionic surfactant is solid at normal temperature, heated to 50 ° C. and dissolved) was used. Spray sprayed for 10-20 minutes. (B) After completion of the addition of the nonionic surfactant, (A) a higher fatty acid salt / inorganic salt complex and an enzyme (protease) are added, and the mixture is further stirred for about 5 minutes to obtain a uniform powdery detergent composition I got a thing.

  The powdery detergent compositions obtained in the above Examples and Comparative Examples were subjected to powder stability tests (solidification, exudation, solubility, cloth adhesion) and detergency tests to evaluate their performance. did. The results are shown in Table 2.

In Table 2, each item was measured and evaluated by the following method. In addition, B * D is the value measured by the method based on JIS-K3362.
[1] Solidification property 1 kg of a powdery detergent composition is sealed in a carton (150 mm × 90 mm × 190 mm) made by sandwiching polyethylene in an amount of 420 g / m ² between coated cardboard and kraft paper. After being stored for 30 days under the recycling conditions of 25 ° C./65% RH × 8 hours and 45 ° C./85% RH × 16 hours, the solidification was subjected to sensory evaluation based on the following criteria.
◎: The surface completely flows and no solidification is observed. ○: Some solidity is recognized in the vicinity of the surface. △: Hardened as a whole, but can be loosened with a spoon. Can't be unraveled or can't be unraveled without applying strong force

[2] Exudation property After the above-mentioned recycling-cleaned powdery cleaning composition is completely discharged from the carton, the state of the carton inner surface in contact with the cleaning composition and the outer surface corresponding thereto is visually observed. And evaluated according to the following criteria.
◎: No blotting is observed ○: Slight moisture is recognized Δ: Moisture is recognized, but does not reach the outside of the carton ×: Exudation is recognized to the outside of the carton

[3] Solubility 1 L of 3 ° hard water adjusted to 20 ° C. is stirred using a stirrer (stirrer: 6 mm × 50 mm) at 150 rotations, and 1 g of the powdery detergent composition is put until completely dissolved. Was measured and evaluated according to the following criteria.
A: 30 seconds or less B: 30-60 seconds Δ: 60-90 seconds X: 90 seconds or more

[4] Adhesiveness of cloth First, 30 L of 3 ° hard water adjusted to 20 ° C. was put into a washing machine, and then three black cotton trainers were immersed therein. Next, 90 g of the powdery detergent composition was added and the mixture was stirred and washed for 5 minutes, and then drained. Without rinsing, the trainer was taken out as it was, and the adhering undissolved cleaning agent was fractionated, the adhesion rate (%) was measured by the following formula, and evaluated according to the following criteria.
Adhesion rate (%) = (Undissolved amount (g) × 100) / Addition detergent composition amount (g)
◎: Less than 1% ○: 1-10%
Δ: 10 to 20%
×: 20% or more

[5] Detergency test [5-1] Production of model soil cloth A bilirubin soil cloth as a model of urine / stool stain, and a spinach soil cloth and milk tea soil cloth as models of spilled dirt were prepared.
Diaper cloth (cotton, plain weave) as bilirubin dirt cloth, cotton broad as spinach dirt cloth and milk tea dirt cloth, using a detergent not containing a fluorescent agent, 2 in hot water (40-50 ° C.). After washing twice, rinsing was sufficiently performed until the rinse liquid disappeared to obtain a blank diaper cloth and cotton broad. Using these, various types of soiled cloth were prepared by the following method.

(1) 0.025 mass% bilirubin / chloroform solution 0.2 mL was dropped on the diaper cloth cut to 5 cm × 5 cm to obtain a bilirubin dirt cloth.
(2) Spinach was heated in a microwave oven, crushed with a mixer, filtered, and the cotton broad was immersed in the filtrate, then suspended and air-dried at room temperature for a day and night to obtain a spinach grass cloth.
(3) 30 g of tea leaves were added to 3 L of boiling tap water, boiled for 5 minutes, filtered through gauze, and 420 g of powdered milk was added to the filtrate and stirred for 1 hour. After immersing the cotton broad in this solution, it was suspended and air-dried at room temperature all day and night to obtain a milk tea stain cloth.

[5-2] Detergency Evaluation Method 0.1 g of the detergent composition was dissolved in 1 L of 3 ° DH hard water (detergent component concentration: 0.1% by mass), and the pH of the cleaning solution was adjusted to a glass electrode type pH meter (F-21, After measuring and confirming with HORIBA, Ltd., various dirt cloths were added and immersed for 2 hours at 25 ° C. Then rinse with running water. For each soiled cloth, the reflectance of the cloth before and after washing was measured with a color difference meter (CR-300, manufactured by Minolta Co., Ltd.), and the washing rate was calculated from the value by the following formula.
Cleaning rate (%) = (A−B) / (C−D) × 100
A: Reflectance after cleaning B: Reflectance before cleaning C: Reflectance of white cloth

  As shown in Table 2, the powdery detergent composition obtained in each example is superior in cleaning power against bilirubin stain as compared with the comparative example, but also against spinach grass stain and milk tea stain. It can be seen that the cleaning power is also excellent. Moreover, it turns out that it is excellent also in powder properties, such as non-solidification property, oozing-out property, solubility, and cloth adhesion.

Claims (1)

(A) a composite of a higher fatty acid salt and an inorganic salt, (B) a nonionic surfactant, (C) an organic chelating agent and (D) an alkali agent,
40% by mass or more of the higher fatty acid salt is an unsaturated higher fatty acid salt.