JP2006169379A - Detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition suitable for clothes, enhancing the effects of an inorganic antibacterial agent to substantially reducing microorganisms in the cleaning liquid even with very small amount of the inorganic antibacterial agent, imparting antibacterial effects to laundries, and further exhibiting sufficient cleaning power. <P>SOLUTION: This detergent composition comprises (A) 3-35 wt.% of an anionic surfactant containing at least partially a linear alkylbenzene sulfonate, (B) 5-70 wt.% of an alkali builder excluding an aluminosilicate, (C) 4-35 wt.% of an aluminosilicate and (D) 0.01-1 wt.% of an inorganic antibacterial agent containing at least one kind antibacterial metal selected from among silver, zinc and copper. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a cleaning agent suitable for apparel that can reduce microorganisms present in the cleaning liquid, further impart antibacterial effects to laundry, contain a low concentration of an inorganic antibacterial agent, and provide sufficient cleaning power Relates to the composition.

  In recent years, the living environment has been improved and a comfortable life has been pursued. Therefore, there is a growing awareness that it is desirable to control microorganisms, suppress the generation of malodors in clothing, and maintain good hygiene.

  Conventionally, it is known that a detergent composition reduces microorganisms during washing by blending a bleaching agent or an antibacterial agent (see, for example, Patent Documents 1 and 2). It is also known that microorganism control can be performed by using some anionic surfactants (see, for example, Non-Patent Document 1).

  Furthermore, it is also known that an inorganic antibacterial agent can be blended in the cleaning composition to reduce microorganisms in the cleaning liquid and to impart an antibacterial effect to laundry (for example, see Patent Document 3).

  However, the amount of the bleaching agent and the anionic surfactant that can be incorporated into the detergent composition is limited, and the amount of the bleaching agent and the anionic surfactant that can be incorporated alone is low, and during a short washing time. It is difficult to sufficiently reduce microorganisms. The effect of inorganic antibacterial agents varies depending on the amount and type of antibacterial metals contained, but the minimum inhibitory concentration (MIC) against bacteria is about several hundred ppm, which is considerably larger than the MIC of antibiotics. . In addition, many inorganic antibacterial agents are expensive, and it is very difficult to mix a large amount of inorganic antibacterial agents into a cleaning composition, and a large amount of inorganic antibacterial agents are added in consideration of environmental impact. It is not preferable to do.

  From such a point, a method (see Patent Document 4) in which a small amount of an inorganic antibacterial agent is effectively used by mixing an inorganic antibacterial agent with a large amount of an amino compound or a carboxylic acid derivative has been proposed. It is not realistic to mix a large amount of amino compound or carboxylic acid derivative in the cleaning composition in view of the cleaning power. Similarly, as a method for improving the effect of silver-containing compounds on microorganisms, a method of using a silver-containing compound and a phosphorus-containing compound in combination (see Patent Document 5) has also been proposed, but a phosphorus-containing compound is used in the cleaning composition. It is difficult to do when considering the eutrophication of rivers and lakes. Furthermore, a method for improving the effect of an inorganic antibacterial agent using a phospholipid surfactant (see Patent Document 6) has also been proposed, but considering the effect and cost, the detergent composition contains a phospholipid interface. It is difficult to use an activator.

Therefore, it is desired that even a cleaning composition containing a very small amount of an inorganic antibacterial agent can sufficiently reduce the microorganisms in the cleaning solution in a short cleaning time, and can further impart an antibacterial effect to the laundry.
Patent 3434453 JP 11-29797 A JP 2002-339243 A Japanese Patent Laid-Open No. 06-212562 Patent 2847529 Japanese Patent Laid-Open No. 09-030913 Journal of Japanese Society for Home Economics Vol.53, No.9, 917-925 (2002)

  The object of the present invention is to improve the effect of the inorganic antibacterial agent, sufficiently reduce the microorganisms in the washing liquid even with a very small amount of the inorganic antibacterial agent, impart an antibacterial effect to the laundry, and exhibit a sufficient detergency An object of the present invention is to provide a cleaning composition suitable for clothing.

    Only a very small amount of inorganic antibacterial agent has a low effect on microorganisms, but by adding a predetermined amount of anionic surfactant containing linear alkylbenzene sulfonate, the amount of microorganisms in the washing solution is sufficiently reduced, and the laundry is antibacterial. An effect can be imparted. However, since sufficient detergency cannot be obtained only with an anionic surfactant, it is necessary to use an aluminosilicate in combination with the detergent composition in order to increase the detergency. However, an aluminosilicate hinders the effect of an anionic surfactant on microorganisms (for example, Non-Patent Document 1).

  As a result of diligent research, the present inventors have given a sufficient effect on microorganisms with or without the use of an aluminosilicate in combination with an alkali builder, in order to overcome the above drawbacks. In addition, since the amount of each component that can be blended in the cleaning composition is limited, it has been found that the balance of each component is important, and the present invention has been made.

  That is, the present invention relates to an anionic surfactant (A) containing at least a part of a linear alkylbenzene sulfonate in an amount of 3 to 35% by weight, an alkali builder excluding an aluminosilicate (B) in an amount of 5 to 70% by weight, an alumino Cleaning composition comprising 0.01 to 1% by weight of inorganic antibacterial agent (D) containing 4 to 35% by weight of silicate (C) and at least one antibacterial metal selected from silver, zinc and copper About.

  The anionic surfactant (A) containing a linear alkylbenzene sulfonate can improve the effect of the inorganic antibacterial agent.

  The anionic surfactant (A) is not particularly limited as long as it partially contains a linear alkylbenzene sulfonate, but an alkyl sulfate, an alpha olefin sulfonate, an alkyl sulfonate, a fatty acid salt, etc. Is exemplified. These anionic surfactants are preferably alkali metal salts such as sodium salts and potassium salts.

 The content of the anionic surfactant in the cleaning composition is 3 to 35% by weight, preferably 5 to 30% by weight. If the content of the anionic surfactant is too low, the efficacy for improving the effect of the inorganic antibacterial agent is poor. In particular, when the content of the linear alkylbenzene sulfonate in the detergent composition is less than 3% by weight, the effect on microorganisms becomes poor. On the other hand, if the content of the anionic surface activity is too large, the burden on the environment increases, and even if the content is increased more than once, no more than a certain improvement can be expected.

  The alkali builder (B) acts so that the aluminosilicate does not hinder the effect of the anionic surfactant on the microorganisms.

  Examples of the alkali builder (B) of the present invention include carbonates, silicates, monoethanolamine, diethanolamine and the like. Carbonate is particularly preferable.

  Examples of the carbonate include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, nickel carbonate, copper carbonate, and ammonium carbonate.

  The carbonate referred to here may be in the form of a hydrate, and examples thereof include sodium carbonate decahydrate, sodium carbonate heptahydrate, sodium carbonate monohydrate, potassium carbonate dihydrate, and the like.

  Among the carbonates, sodium carbonate, potassium carbonate, sodium carbonate decahydrate, sodium carbonate heptahydrate, sodium carbonate monohydrate, potassium carbonate dihydrate and the like are preferable.

 Content of the alkali builder (B) in a cleaning composition is 5-70 weight%, Preferably it is 15-60 weight%. When there is too little content of alkali builder (B), the effect with respect to microorganisms will be adversely affected. If the amount is too large, the content of other components decreases, the effect of the inorganic antibacterial agent cannot be improved, and a sufficient detergency cannot be obtained.

  The aluminosilicate (C) serves to supplement the detergency that is insufficient with only an anionic surfactant.

  Examples of the aluminosilicate (C) include crystalline aluminosilicates, amorphous aluminosilicates, clay compounds such as silicon dioxide and hydrated silicate compounds. Particularly preferred is crystalline aluminosilicate.

  If the content of the aluminosilicate in the cleaning composition is less than 5% by weight, sufficient cleaning power cannot be obtained, and if it exceeds 35% by weight, the effect on microorganisms is adversely affected.

  The inorganic antibacterial agent (D) acts to reduce microorganisms in the cleaning liquid and impart an antibacterial effect to the laundry.

  As the inorganic antibacterial agent (D), those containing silver as an antibacterial metal component are preferable. Examples of antibacterial metal components other than silver include copper, zinc, and ions thereof.

  The content of the antibacterial metal in the inorganic antibacterial agent (D) is 0.1 to 30% by weight, preferably 1 to 20% by weight.

  The substance (carrier) that supports the antibacterial metal may be any substance as long as it has porosity, adsorptivity, or ion exchange properties, but in view of the amount of the antibacterial metal supported, silicic acid compounds are preferred. In particular, zeolite, glass, silicic acid, calcium silicate, aluminum silicate, zinc silicate, zirconium silicate, zirconia, alumina and the like are preferable.

  The content of the inorganic antibacterial agent in the cleaning composition is 0.01 to 1% by weight, preferably 0.1 to 0.7% by weight. If the content is less than 0.01% by weight, the effect on microorganisms is poor, whereas if it exceeds 1% by weight, the cost increases.

  In addition to the above essential components, auxiliary components such as nonionic surfactants, sulfates, bleaches, fluorescent agents, fragrances, enzymes and the like can be blended as necessary.

  The cleaning composition of the present invention is not limited by the form, and can take any form such as powder, tablet, granule, liquid, paste, and gel.

  The present invention also relates to a method of using the cleaning composition in a liquid. In the method for using the cleaning composition, the concentration of the component (A) is 30 ppm to 300 ppm, preferably 70 ppm to 250 ppm, more preferably 100 ppm to 200 ppm, and the concentration of the component (B) is 40 ppm to 700 ppm, preferably 200 ppm. 650 ppm, more preferably 300 ppm to 600 ppm, the concentration of component (C) is 30 ppm to less than 300 ppm, preferably 40 ppm to 200 ppm, more preferably 50 ppm to 150 ppm, and the concentration of component (D) is 0.1 ppm -10 ppm, preferably 0.5 ppm to 7 ppm, more preferably 1 ppm to 5 ppm.

  According to the present invention, the effect of the inorganic antibacterial agent is improved, and even a very small amount of the inorganic antibacterial agent sufficiently reduces the microorganisms in the washing liquid, imparts an antibacterial effect to the laundry, and further exhibits a sufficient detergency. A cleaning composition suitable for clothing can be provided.

  EXAMPLES Next, although an Example and a comparative example are given and demonstrated concretely, this invention is not limited to these Examples.

Examples 1-7
(A) Sodium linear alkylbenzenesulfonate having an alkyl chain having an average carbon number of 12 as component (A), sodium carbonate as component (B), zeolite A as component (C), and silver and zinc as component (D) Inorganic antibacterial agents supporting the above are blended in the proportions shown in Table 1, and if necessary, polyoxyethylene having an alkyl chain having an average carbon number of 12 and an average ethylene oxide addition mole number of 10 as a nonionic surfactant. Alkyl ether (E) was added to prepare a cleaning composition. 0.83 g of this composition was placed in 1 liter of tap water to prepare a cleaning solution. Table 2 shows the concentrations (ppm) of components (A), (B), (C), (D), and (E) in this liquid.

Comparative Examples 1-6
As shown in Table 3, at least one of the essential components (A), (B), (C), and (D) used in the examples is missing, or the above components are blended so that the blending amount does not fall within the predetermined blending range. Then, as necessary, a polyoxyethylene alkyl ether (E) having an alkyl chain having an average carbon number of 12 and an average ethylene oxide addition mole number of 10 as a nonionic surfactant was added to prepare a cleaning composition. 0.83 g of this composition was placed in 1 liter of tap water to prepare a cleaning solution. Table 4 shows the concentrations (ppm) of the components (A), (B), (C), (D), and (E) in this liquid.

Evaluation test a) Measurement of the number of bacteria in the cleaning solution The cleaning compositions shown in Examples and Comparative Examples were dissolved in sterilized water to prepare test solutions having the concentrations shown in Tables 2 and 4. 10 mL of the test solution was inoculated with 0.1 mL of a Staphylococcus aureus IFO12732 suspension adjusted to 1 ± 0.3 × 10 ⁸ cells / mL, and contacted for 10 minutes. Thereafter, each test solution was appropriately diluted, mixed with an agar medium in a petri dish to form a flat plate, and cultured at 37 ± 1 ° C. for 48 to 72 hours. The number of colonies grown in the petri dish was counted, and the number of bacteria was calculated by multiplying by the dilution factor. Sterile water was used as a blank instead of the test solution, and the same treatment as above was performed. The difference in the logarithmic value of the viable cell count between the blank and the test solution was defined as an effect on microorganisms in the cleaning solution, and each cleaning composition was evaluated according to the following criteria for this effect. The evaluation results are shown in Tables 1-2 and 3-4.

Effect on microorganisms in cleaning solution: difference in logarithm of viable count ◎: 2 or more ○: 1 or more to less than 2 × less than 1

b) Antibacterial power test Antibacterial evaluation In accordance with JIS-L-1902, the following antibacterial test of the test cloth was performed.

b-1) Preparation of test cloth The detergent compositions obtained in Examples and Comparative Examples were dissolved in tap water to prepare test solutions having the concentrations shown in Tables 2 and 4. About 30 g of cotton cloth No. 3 was put into each test solution, and “Terg-O-Tometer” manufactured by Ueshima Seisakusho Co., Ltd. was used as a washing machine, and washing was performed for 10 minutes at 120 rpm and 30 ° C. Thereafter, rinsing was carried out for 3 minutes × 2 times with 1 liter of tap water, followed by air drying to obtain a test cloth. Using tap water as a blank instead of the test solution, the same treatment as described above was performed, and the resulting cleaning cloth was used as a reference cloth.

b-2) Antibacterial activity test method The test cloth was cut into a 18 mm square size, and the cut piece was put into a 0.4 g vial. The vial with the cut piece and the cap were autoclaved at 121 ° C. for 30 minutes. They were then dried for 1 hour in a safety cabinet. Next, each sample cloth was inoculated with 0.2 mL of a Staphylococcus aureus IFO12732 suspension adjusted to 1 ± 0.3 × 10 ⁵ cells / mL with a 1/20 concentration neutral liquid medium. Was sealed with a cap, and the bacteria were cultured at 37 ± 1 ° C. for 18 ± 1 hour. LP culture solution 20mL was added to the vial bottle after culture | cultivation, and it sonicated for 10 minutes at 10 degrees C or less, and left still for 5 minutes, and the microbe was extracted. Each extract was appropriately diluted, mixed with an agar medium in a petri dish to form a plate, and cultured at 37 ± 1 ° C. for 48 to 72 hours. The number of grown colonies was counted, and the number of bacteria was calculated by multiplying by the dilution factor. A reference cloth was used instead of the test cloth, and the same treatment as described above was performed. The difference in the logarithm of the number of viable bacteria between the test cloth and the reference cloth was defined as an antibacterial effect, and each cleaning composition was evaluated according to the following criteria for this effect. The evaluation results are shown in Tables 1-2 and 3-4.

Antibacterial effect: difference in logarithmic value from reference cloth ◎: 2.5 or more ○: 1.5 or more to less than 2.5 ×: less than 1.5

c) Detergency test The detergent compositions obtained in Examples and Comparative Examples were added to 90.5 ppm calcium carbonate-containing water to prepare sample solutions having the concentrations shown in Tables 2 and 4. In each liter of sample solution, 4 pieces of 10 cm × 10 cm artificially contaminated cloth prepared as described below were put, and “Terg-O-Tometer” manufactured by Ueshima Seisakusho Co., Ltd. was used as a washing machine under conditions of 100 rpm and 30 ° C. Washing was performed for minutes, and washing efficiency was determined. The determination of the cleaning efficiency was performed by measuring the reflectances of the raw cloth, the contaminated cloth before cleaning, and the contaminated cloth after cleaning, respectively, and obtained by the following formula. Each sample was evaluated according to the following criteria. The evaluation results are shown in Tables 1-2 and 3-4.

Judgment criteria Cleaning efficiency (%) 45 or more
30 or more and less than 45 ...
Less than 30

Artificial contaminated cloth Oleic acid 15.0%, palmitic acid 7.5%, myristic acid 7.5%, beef tallow 30.0%, cholesterol 10.0%, squalene 10.0%, cetyl alcohol 10.0% 80 g of the composition was placed in a beaker, mixed and dissolved at 60 to 80 ° C. on a water bath, and 12 g of carbon black was added thereto. This mixture is dispersed in 12 liters of an organic solvent, and a gold width 2023 cloth is dipped in the dispersion liquid, and the soil composed of the composition and carbon black is adhered to the cloth, and then the organic solvent is evaporated and removed. A contaminated cloth was obtained.

  As can be seen from Tables 1 and 2 above, all of the cleaning compositions of Examples containing a predetermined amount of LAS, carbonate, zeolite and inorganic antibacterial agent have a high reducing effect on microorganisms present in the cleaning liquid, and cleaning. It had a high antibacterial effect and sufficient detergency for later clothing. On the other hand, as shown in Tables 3 to 4, when at least one of LAS, carbonate, zeolite, and inorganic antibacterial agent is not within the predetermined range, the effect of reducing microorganisms in the washing liquid is low, or clothing after washing The antibacterial effect was not obtained, and sufficient detergency was not obtained.

Examples 8-12
(A) Sodium linear alkylbenzenesulfonate having an alkyl chain having an average carbon number of 12 as component (A), sodium carbonate as component (B), zeolite A as component (C), and silver and zinc as component (D) Inorganic antibacterial agents carrying the above were blended in the proportions shown in Table 5, respectively, and an appropriate amount of additives was added to prepare a detergent composition.

In the above Tables 1-5,
LAS-Na: linear alkylbenzene sulfonate sodium having an alkyl chain having an average carbon number of 12 AE: polyoxyethylene alkyl ether having an alkyl chain having an average carbon number of 12 and an average ethylene oxide addition mole number of 10 (nonionic surfactant) )
Sodium carbonate: Sodium carbonate Zeolite: Type A zeolite Inorganic antibacterial agent: Silver zinc based inorganic antibacterial agent

Claims (5)

  Anionic surfactant (A) 3 to 35% by weight containing linear alkylbenzene sulfonate at least partially, Alkali builder (B) 5 to 70% by weight excluding aluminosilicate, Aluminosilicate (C) 4 A detergent composition comprising 0.01 to 1% by weight of an inorganic antibacterial agent (D) containing ˜35% by weight and at least one antibacterial metal selected from silver, zinc and copper.   The cleaning composition according to claim 1, wherein the content of the antibacterial metal supported in the inorganic antibacterial agent (D) is 0.1 to 30% by weight.   A method of using the cleaning composition according to claim 1 in a liquid, wherein the concentration of component (A) is 30 ppm to 300 ppm, the concentration of component (B) is 40 ppm to 700 ppm, and the concentration of component (C) is 30 ppm. The usage method of the cleaning composition which is less than -300 ppm and the density | concentration of (D) component is 0.1 ppm-10 ppm.   The concentration of component (A) is 70 ppm to 250 ppm, the concentration of component (B) is 200 ppm to 650 ppm, the concentration of component (C) is preferably 40 ppm to 200 ppm, and the concentration of component (D) is 0.5 ppm to 7 ppm. The use method of the cleaning composition of Claim 3.   The concentration of the component (A) is 100 ppm to 200 ppm, the concentration of the component (B) is 300 ppm to 600 ppm, the concentration of the component (C) is 50 ppm to 150 ppm, and the concentration of the component (D) is 1 ppm to 5 ppm. Of using the detergent composition of the present invention.