JP2003277789A - Liquid detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid detergent composition suitable for cleaning stains peculiar to baby clothes that are derived from bilirubin of urine and feces. <P>SOLUTION: This liquid detergent composition comprises 1-10 mass% of a nonionic surfactant, 1-10 mass% of an 8-14C fatty acid, 1-20 mass% of ethanol amine, 15-30 mass% of an organic chelating agent, and 5-20 mass% of at least one of potassium hydroxide and sodium hydroxide. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid detergent composition used for washing clothes, and more particularly to a liquid detergent composition suitable for washing baby clothes. It is about things. [0002] Baby clothes, such as sashes and pants, worn by newborns and extremely young infants, are heavily soiled with excrement such as urine and stool, which is a hemoglobin degradation product. Contains some yellow components such as bilirubin and forms extremely stubborn stains. For this reason, ordinary liquid detergents for sebum dirt and mud dirt cannot remove dirt specific to baby clothing. Has been developed. For example, the "liquid detergent composition" disclosed in Japanese Patent Application Laid-Open No. 11-5997 has a detergency for not only bilirubin stain but also dirt attached to ordinary clothes such as sebum stain and mud stain. However, it required relatively high concentrations during use. SUMMARY OF THE INVENTION The present invention relates to a stubborn stain formed by bilirubin in urine or stool specific to baby clothes, and a conventional method for treating dirt on foods such as oils and fats, proteins, sebum dirt and mud dirt. For any of the dirt on your clothes,
It is an object of the present invention to provide a stable liquid cleaning composition that exhibits an excellent cleaning effect in an extremely small amount. [0004] The present inventors have conducted research to solve the above-mentioned problems, and as a result, have found that a liquid comprising a combination of a nonionic surfactant, a fatty acid, ethanolamine, a chelating agent, and a hydroxide. The cleaning composition is sufficient for both stubborn stains formed by bilirubin in urine and stool and dirt on food such as oils and fats, proteins, and dirt on ordinary clothes such as sebum dirt and mud dirt. It was found that it has a good detergency. The present invention has been completed based on this finding. Therefore, the present invention provides (A) 1 to 10% by mass of a nonionic surfactant, (B) 1 to 10% by mass of a fatty acid having 8 to 14 carbon atoms, (C) monoethanolamine,
1 to 20% by mass of at least one ethanolamine selected from the group consisting of diethanolamine and triethanolamine, (D) 5 to 30% by mass of an organic chelating agent, and (E) at least one of potassium hydroxide or sodium hydroxide A liquid detergent composition comprising 5 to 20% by mass of a seed. [0005] The nonionic surfactant (A) used in the present invention is not particularly limited as long as it is used in a usual liquid detergent for clothing, and a wide range of nonionic surfactants can be used. . Preferred nonionic surfactants have a linear or branched chain having 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms as a hydrophobic group, and have an average addition mole number of ethylene oxide or propylene oxide of 5-2.
0, preferably 6 to 15. Examples of the nonionic surfactant used in the present invention include polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene polyoxypropylene alkyl or alkenyl ether, polyoxyalkylene glycol fatty acid ester, and alkylamine EO adduct. There is. These nonionic surfactants are 1-10%
(Hereinafter, mass% is abbreviated as%), preferably 3 to 10
%. The (B) fatty acid having 8 to 14 carbon atoms used in the present invention may be either saturated or unsaturated, and examples thereof include octanoic acid, 2-ethylhexanoic acid, decanoic acid and dodecanoic acid. These fatty acids are 1-10%,
Preferably, 3 to 10% is blended. The (C) ethanolamine used in the present invention is at least one ethanolamine selected from the group consisting of monoethanolamine, diethanolamine and triethanolamine. When the ethanolamine is used alone, diethanolamine is particularly preferred. The amount of the ethanolamine to be added is 1 to 20%, preferably 1 to 15%, based on the liquid detergent composition. If the amount of ethanolamine is less than 1%, the detergency will be insufficient, and if it exceeds 20%, the performance will be in an equilibrium state, which is not economically preferable. [0008] The chelating agent (D) used in the present invention is used in ordinary liquid washing. Examples of preferred chelating agents include citric acid, gluconic acid, ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and polycarboxylic acids of nitrilotriacetic acid (NTA) or alkali metal salts thereof. Tetraacetic acid is preferred. In the present invention, these can be used alone or in combination. The amount of the chelating agent is suitably 5 to 30%, preferably 5 to 25%, particularly preferably 5 to 20%, based on the liquid detergent composition. If the amount of the chelating agent is less than 5%,
This is because the detergency is insufficient.
This is because the detergency is also in an equilibrium state and the solubility is poor. In the present invention, 5 to 20% of (E) potassium hydroxide or sodium hydroxide is further added. If it is less than 5%, the detergency will be insufficient, and if it exceeds 20%, the detergency will not be further improved, and the stability over time will be poor. The optional components used in the present invention include solvents such as propylene glycol and ethyl alcohol. The amount of such a solvent is suitably 1 to 40%, preferably 5 to 30%. Further, if necessary, an enzyme, an enzyme stabilizer, a preservative, an antibacterial agent, a fluorescent agent, a dye, a fragrance and the like can be added. The liquid detergent composition of the present invention is prepared by adding water to these various components. The concentration of these components is 5 to 80%, especially 15 to 70%.
% Is preferable. In particular, the liquid detergent composition of the present invention has excellent stability over time even at a high component concentration of 45% or more, and can maintain a uniform transparent liquid system. Further, when the liquid detergent composition of the present invention is used, it is preferable that the component concentration in the washing liquid in the washing machine be 0.01 to 1%. It is preferable that the concentration of the components in the cleaning liquid is 0.05 to 3%. In particular, the liquid detergent composition of the present invention has a content of 0.05 to
Even at a low component concentration of about 0.1%, high detergency is exhibited. [0010] The liquid detergent composition according to the present invention comprises a stubborn stain formed by bilirubin in urine or stool, and dirt on food such as oils and fats, proteins, sebum dirt and mud dirt. It exerts an excellent cleaning effect on both. Therefore, the baby clothes can be finely finished by one washing. Hereinafter, the present invention will be described in detail and specifically with reference to examples, but the present invention is not limited to the examples. EXAMPLES Liquid detergent compositions having the compositions shown in Table 1 were prepared, and their performance was evaluated by the following methods. The results are also shown in the table. The numbers in the table indicate%. [Evaluation method of detergency] Bilirubin dirt cloth as a model of urine dirt, spinach,
Milk black tea cloth was made. Wash the diaper cloth (cotton, plain weave) as the bilirubin stain cloth and cotton broad as the spinach and milk tea stain cloth using a cleaning agent that does not contain a fluorescent agent, using hot water (40-50 ° C) twice. After that, rinsing was sufficiently performed until bubbles of the rinsing liquid disappeared. A 0.025% bilirubin / chloroform solution was added to the above diaper cloth cut to 5 cm × 5 cm.
The bilirubin soiled cloth was obtained by dropping 2 mL. The spinach was heated in a microwave oven, crushed with a mixer, and then filtered. The obtained cotton broad was soaked in the obtained spinach juice, then suspended and air-dried at room temperature for 24 hours to obtain a spinach soiled cloth. 30 g of black tea leaves are added to 3 L of boiling tap water, boiled for 5 minutes, and then filtered with gauze.
The cotton broad was immersed in a solution added with 20 g and stirred for 1 hour, then suspended and air-dried at room temperature for 24 hours to obtain a milk black tea cloth. Washing method: 1 mL of cleaning agent is diluted in 1 L of 3 ° DH hard water,
Various dirty cloths were added and immersed at 25 ° C. for 2 hours. After immersion, rinsing with running water was performed to determine the cleaning rate. The reflectance of each of the soiled cloths was measured before and after the cleaning, and the cleaning rate was calculated from the reflectance by the following equation. Cleaning rate (%) = (AB) / (CB) × 100 A: reflectance after cleaning B: reflectance before cleaning C: reflectance of white cloth As described above, the bilirubin detergency is the ability to wash bilirubin, which is a model soil peculiar to baby clothes, and the spinach juice and milk tea detergency are model dirt that is spilled over. The cleaning performance. As is clear from Table 1, the liquid detergent compositions of Examples 1 to 5 have superior bilirubin detergency, spinach juice, and milk tea detergency as compared with the liquid detergent compositions of Comparative Examples 6 to 10. ing. Therefore, it is clear that the liquid detergent composition of the present invention has excellent detergency against both soil and spills peculiar to baby clothes and spills. Further, the compositions of the examples maintained a uniform transparent liquid at room temperature for one month or more at any temperature. The liquid detergent composition of the present invention exerts excellent detergency on clothes such as diapers and bibs for babies even at a low concentration, and has a detergent component concentration of 45%.
%, And maintains a uniform transparent liquid system with good stability over time even at a high concentration of at least%.

Claims (1)

Claims: (1) 1 to 10% by mass of a nonionic surfactant, (B) 1 to 10% by mass of a fatty acid having 8 to 14 carbon atoms, (C) monoethanolamine, diethanolamine And at least one ethanolamine selected from the group consisting of triethanolamine and 1 to 20% by mass,
(D) 5 to 30% by mass of an organic chelating agent and (E) at least one kind of potassium hydroxide or sodium hydroxide by 5%
Liquid detergent composition characterized by containing about 20% by mass.