JP2007302840A - Detergent composition for laundry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition for laundry, exhibiting excellent detergency including activities for inhibiting and reducing yellowing, providing high disinfecting and deodorant effects and being prepared inexpensively. <P>SOLUTION: The detergent composition for the laundry contains a surfactant component, and a baked calcium powder obtained by baking shells of organisms as essential components. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a detergent composition used for washing clothes and the like in general households.

  In general, laundry detergents contain various additives such as builders, enzymes, bleaches, fluorescent brighteners, and perfumes in addition to surfactants. Among these additives, the most representative builder is a cleaning aid that greatly improves the cleaning performance in cooperation with the surfactant even if it has poor cleaning power by itself. Although it exists, in particular, those having a chelating action for capturing metal ions in washing water are frequently used.

  The chelating action of the builder leads to improved detergency because calcium ions and magnesium ions act as a binder for dirt that adheres to substrates such as fibers, and is derived from calcium ions, magnesium ions, iron ions, etc. and sebum This is because it binds with fatty acid to form metal soap, which adheres to clothes and becomes a major cause of yellowing.

  Examples of organic builder having a chelating action include sodium salts of common carboxylic acids such as citric acid and gluconic acid, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA). ), Aminocarboxylic acids such as L-glutamic acid diacetic acid (GLDA), hydroxyethylethylenediaminetetraacetic acid (HEDTA), triethylenetetraaminehexaacetic acid (TTHA), hydroxyethyliminodiacetic acid (HIDA), dihydroxyethylglycine acid (DHEG) Sodium salts of acids are used. Moreover, as an inorganic builder having a chelating action, condensed phosphates that have been widely used in the past have been eliminated as a causative substance of eutrophication, and a zeolite that is an aluminosilicate is now widely used as an alternative. Furthermore, sodium carbonate and sodium silicate are also used as an alkali builder responsible for improving the detergency by the alkali buffering action.

  However, in laundry detergents, the above builder does not have a sufficient yellowing suppression effect, so in addition to these builders, a bleaching agent and a fluorescent whitening agent are also added, but it is desired to further improve the yellowing suppression and reduction action. In addition, further improvement in cleaning power against general dirt is expected.

  By the way, mold and bacteria are easy to propagate on the outer surface of a washing tub of a household washing machine and a drainage path, and it is not only slimy and filthy, but a loose thing may adhere to the laundry and cause dirt. For this reason, chlorine / oxygen-based disinfectant cleaners are commercially available as washing tub cleaners. However, when they are used, the cleaners are put into a washing tub filled with water and left for several hours. Since washing and rinsing operations are repeated several times, waste of time and water consumption is large, and the wastewater contains toxic substances of chlorine and oxygen, causing environmental problems in river discharge and a heavy load on sewage treatment. Become.

  Accordingly, there is a need for simple and effective means for reducing the environmental load in place of the washing tub cleaner as described above, in order to sterilize the washing tub and drainage path of the washing machine. On the other hand, when clothes are washed after washing, unpleasant odors are often generated from the laundry, and there is a strong demand for prevention of such odors.

  In view of the above-mentioned circumstances, the present invention can exhibit excellent cleaning performance including suppression and reduction of yellowing as a laundry detergent composition, provides high sterilization and deodorization effects, and can be prepared at low cost. The purpose is to provide things.

  In order to achieve the above object, a laundry detergent composition according to claim 1 of the present invention is characterized by containing a surfactant component and a calcined calcium powder obtained by calcining a biological shell as essential components.

  Further, in the present invention, in the laundry detergent composition according to claim 1, the calcined calcium powder is obtained by pulverizing and calcining scallop shells, and the average particle size of the calcined calcium powder is 5 to 100 μm. The composition of claim 3, the composition of claim 4 in which the whole is in powder form, the composition of claim 5 containing an alkali metal salt of a fatty acid as a surfactant component, and the weight ratio of the surfactant component to the calcined calcium powder. The configuration according to claim 6, which is in the range of 1/3 to 3/1, is a preferred embodiment.

  According to the laundry detergent composition of the first aspect of the present invention, since the calcined calcium component contained exhibits excellent chelating action and alkali buffering action, the cleaning power is greatly improved, and in particular, a high cleaning effect against blood stains. In addition to being used for washing repeatedly, the yellowing that had occurred in the clothing will fade, and the strong antibacterial action will also remove mold in the washing machine's washing tub and drainage path, and also dry the laundry in shade. The odor that occurs when you do this is also eliminated. Moreover, such a laundry detergent composition has the above-mentioned amino acid generally contained in the detergent by adding the calcined calcium component at a low cost using raw shells such as shells as a raw material. Since organic builder such as sodium carboxylate and inorganic builder such as zeolite can be omitted or reduced, there is an advantage that it can be prepared at low cost.

  According to the invention of claim 2, in the laundry detergent composition described above, since the calcined calcium powder is made from scallop shell, a particularly excellent detergency can be obtained, and a large amount of food scallop is consumed. Since the shell can be used effectively, it can contribute to resource conservation and environmental conservation.

  According to the invention of claim 3, in the laundry detergent composition described above, the calcined calcium powder is in a specific particle size range, so that the aforementioned chelating action and alkali buffering action can be exerted strongly, as well as washing drainage and rinsing. There is no concern of being discharged with water and sticking to the laundry.

  According to the invention of claim 4, since the whole laundry detergent composition is powdery, it is useful as a powder detergent that is easy to use for laundry at home.

  According to the invention of claim 5, since the laundry detergent composition includes a specific surfactant component, the effect of improving the cleaning power by the calcined calcium powder is more effectively exhibited.

  According to the invention of claim 6, in the laundry detergent composition described above, since the surfactant component and the calcined calcium powder are in a specific ratio, the cleaning action by the cooperation of both is more efficiently exhibited. .

As described above, the laundry detergent composition of the present invention is characterized by containing a surfactant component and a calcined calcium powder obtained by calcining the biological shell as essential components, and has an excellent detergency, particularly A high cleaning effect against blood stains can be obtained, and the effect of thinning the yellowing that has occurred in clothing by repeated use has been confirmed. Therefore, since calcium ions (Ca ²⁺ ), which is a hardness component in water, together with magnesium ions (Mg ²⁺ ), etc., inhibit the washability at the time of washing and cause yellowing, from the conventional general idea If this is the case, the calcium component should be avoided in laundry detergents, but the calcined calcium powder used in the present invention has demonstrated that it has an excellent function as a cleaning aid that greatly improves detergency. Has been.

  The calcined calcium powder obtained by calcining the living body shell is obtained by calcining the calcium carbonate shell associated with the living body such as shellfish, and the component is mainly composed of calcium oxide. The so-called quicklime obtained by pyrolysis of limestone has different properties and does not generate heat due to intense reaction with water. Although the reason for this is not clear, for example, when calcined calcium powder obtained from scallop shells is added to water, it only dissolves at a maximum of about 0.2% (20 mg / L), and occurs when quick lime is hydrated. Since no such heat of reaction is observed, there is no rapid calcium hydroxide formation and there is little increase in pH of the liquid, so it is presumed that it exists as ceramic particles without being ionized much in water.

Thus, the particles of the calcined calcium powder derived from the living body shell have an activated carbon-like porous structure having innumerable voids due to the release of carbon dioxide gas from the calcium carbonate (CaCO ₃ → CaO + CO ₂ ) during firing. It is confirmed from the photo. Therefore, in the laundry detergent containing this calcined calcium powder, the porous particles of the powder function to adsorb metal components and fatty acids in the washing water and prevent reattachment of the laundry to the fibers. Therefore, the detergency is greatly improved. Especially for blood stains, it has been found that the detergency is remarkably improved by chelating the iron content of hemoglobin and the alkaline buffer action.

In addition, regarding the excellent adsorption action of calcined calcium, if the powder is added to a container containing an iron rust (Fe ³⁺ ) solution that is turbid in brown and left to stand for several tens of minutes, a yellowish brown color is formed at the bottom of the container. It has also been confirmed that a precipitate is deposited and the whole liquid becomes colorless and transparent. This adsorption of iron rust corresponds to a chelate (metal sequestration) action.

  Further, according to the laundry detergent composition of the present invention, in addition to the excellent cleaning performance as described above, a high antibacterial and sterilizing action is exhibited, and it is free of mold and germs on the outer surface of the washing tub of the washing machine and the drainage route. Propagation is prevented, and mold and germs that have already adhered are removed and purified, and the generation of odor when clothes after washing are shaded is prevented. Such antibacterial and antibacterial effects are achieved by adsorbing and removing detergent components, fatty acids, metal soaps, etc., from which the calcined calcium powder is a nutrient source for microorganisms, and replacing the metal in the microorganisms with calcium to make it impossible to grow. This is considered to be due to, for example, dissolving microbial proteins by alkalinizing the washing water. Thus, since calcined calcium and its elution components are harmless, there is no concern of causing harmful components in the wastewater unlike chlorine / oxygen-based disinfectants and the burden on the environment and sewage treatment is reduced.

  Examples of the biological shell that is a raw material of the calcined calcium powder to be blended in the laundry detergent of the present invention include, for example, scallop shells, oysters, turban shells, sea bream shells, clams, clams, swordfish shells, sea urchin shells, and egg shells. , Etc. In addition, shellfish, especially scallop shells that are consumed in large quantities, can be obtained at low cost, and can contribute to resource conservation and environmental conservation as an effective use of waste, as well as a baked and crushed product with a homogeneous cleaning aid. Therefore, it is recommended as a particularly suitable one.

  Calcination of a calcium source such as the above shell is carried out in a small amount using an autoclave, an electric furnace or the like, and in a large amount using a rotary kiln, a large-scale combustion furnace or the like, but preferably as an inert gas atmosphere at a temperature of about 700 to 1100 ° C. What is necessary is just to heat about several minutes-several hours. The pulverization may be performed before or after firing, or may be coarsely pulverized and further pulverized after firing. The particle size of the calcined calcium powder is preferably about 5 to 100 μm in average particle diameter. If it is too fine, the porous structure of the particle is crushed and the chelating action is reduced. There is a concern.

  The blending ratio between the surfactant and the calcined calcium powder is preferably in the range of 1/3 to 3/1 by weight, and the detergency is reduced if the proportion of the calcined calcium powder is too small or too large.

  The surfactant is not particularly limited, and any anionic or nonionic surfactants conventionally blended in laundry detergents can be used. For example, as an anionic surfactant, fatty acid alkali metal salt soap, linear alkylbenzene sulfonate (abbreviation LAS), higher alcohol sulfate ester (AS), polyoxyethylene alkyl ether sulfate (AES) , Α-sulfo fatty acid ester, α-olefin sulfonate, and the like. A typical nonionic surfactant is polyoxyethylene alkyl ether (same AE).

  Thus, it has been found that the laundry detergent of the present invention exhibits a particularly high cleaning effect when the fatty acid alkali metal salt soap is included as a surfactant.

  The laundry detergent composition of the present invention includes organic and inorganic builders, enzymes, bleaching agents, optical brighteners, alkali modifiers, viscosity modifiers, fragrances, etc. together with the surfactant and calcined calcium described above. Various additives can be appropriately blended as necessary. The form of the detergent composition may be any of powder, gel, cream, dispersed liquid, etc., but powder is recommended for ease of use as a laundry detergent.

  Examples of the present invention will be specifically described below in comparison with comparative examples. The used detergent (surfactant) and calcined calcium powder (abbreviated as calcined Ca powder) are as follows. In the following, “%” means “% by weight”.

Detergent A: Compact Coal manufactured by Lion, 40% surfactant (sodium linear alkylbenzene sulfonate, polyoxyethylene alkyl ether, sodium fatty acid, sodium α-olefin sulfonate) and other builder (aluminum silicic acid) Salt, carbonate), enzyme, and optical brightener.
Detergent B: Vivid S manufactured by Matsui Chemical Co., Ltd., 30% fatty acid potassium soap, 10% by weight of higher alcohol nonionic surfactant, and additionally contains an alkali adjusting agent and a viscosity adjusting agent.
Detergent C ... Palm fruit detergent 100%
Detergent D: Potassium soap (sodium laurate) 100%

[Firing Ca powder]
The dried scallop shell is coarsely pulverized, the pulverized product is loaded into an electric furnace, the inside is replaced with nitrogen gas, and the baked product is allowed to cool to room temperature after being baked at about 1000 ° C. for 30 minutes. The pulverized product was sieved to remove coarse particles, and the average particle size was about 22 μm.

Examples 1-4, Comparative Examples 1-6
Cotton / carbon-contaminated cloth (EMPA-101) using a laundry detergent having the composition shown in Table 1 below, using a fully automatic washing machine for home use (Aitsuma NA-W305, manufactured by Matsushita Electric Industrial Co., Ltd., load 3 kg), A TC / carbon-contaminated cloth (EMPA-104) and a blood-contaminated cloth (EMPA-111) were respectively washed to perform a cleaning rate test. The results are shown in Table 1 together with the washing water pH during washing in Examples 1 and 2 and Comparative Examples 1 and 2. In addition, the washing | cleaning rate was represented by the percentage of the reflectance after washing | cleaning with respect to the reflectance before washing | cleaning measured with the reflectometer (Tokyo Denshoku TR-1000D). The washing conditions were standard washing (washing 15 minutes-dehydration 1 minute-rinse rinse 5 minutes-dehydration 1 minute), and the water temperature was 8 ° C.

  From the results shown in Table 1, the laundry detergent of the present invention containing the calcined calcium powder generally has improved cleaning properties compared to the powder-free detergent, and is particularly excellent in detergency against blood stains. In the composition (Examples 2 and 4) in which the activator is mainly soap, a particularly good result is obtained as compared with the composition containing no soap (Comparative Examples 2 and 5). On the other hand, from the comparison of each of Example 3 and Comparative Example 4, Example 4 and Comparative Example 6, the calcined calcium used in the present invention is superior to the zeolite conventionally used as a builder. It is suggested that the amount of the conventional builder component can be greatly reduced.

(Dye adsorption test)
In order to compare the dye adsorptive properties of calcined calcium and zeolite, about 5 ml of a colored liquid obtained by dissolving 0.1 mg of blue dye (Dylon Japan No. 19) in 100 ml of purified water, Each 0.1 g of powder was added and mixed, and the color change after 30 minutes was observed. As a result, there was almost no change in the colored state when the zeolite was added, whereas when the calcined calcium was added, a colored precipitate was deposited on the bottom of the container, and the supernatant was a very thinly colored transparent liquid. From this result, it was found that the calcined calcium powder has a much higher dye adsorptivity than the zeolite powder and is advantageous in preventing color transfer between clothes during washing.

[Antimicrobial test]
A calcined calcium powder (same as in Examples) is dissolved in ion-exchanged water by heating to prepare a 0.15% concentration solution, and 10 ml is dispensed into a standard agar medium. Pseudomonas aeruginosa, Salmonella, Vibrio parahaemolyticus, Escherichia coli Each of these was inoculated with 0.1 ml of 10 ⁷ bacterial solutions, and the number of viable bacteria was measured over time at room temperature of 25 ° C. The results are shown in Table 2 below. <10 is synonymous with non-detection outside the measurement limit.

From the results in the above table, the calcined calcium powder blended in the laundry detergent composition of the present invention has a very excellent antibacterial activity, and prevents and removes the growth of mold and germs in the washing tub and drainage path of the washing machine. It can be seen that it contributes to

Claims (6)

  A detergent composition for laundry, comprising a surfactant component and calcined calcium powder obtained by calcining a living shell as essential components.   The laundry detergent composition according to claim 1, wherein the calcined calcium powder is obtained by pulverizing and firing scallop shells.   The laundry detergent composition according to claim 1 or 2, wherein the calcined calcium powder has an average particle size of 5 to 100 µm.   The laundry detergent composition according to any one of claims 1 to 3, wherein the whole is in a powder form.   The laundry detergent composition according to any one of claims 1 to 4, comprising an alkali metal salt of a fatty acid as a surfactant component. The laundry detergent composition according to any one of claims 1 to 5, wherein a weight ratio of the surfactant component and the calcined calcium powder is in the range of 1/3 to 3/1.