JP5349792B2 - Liquid detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid detergent composition in which the spotting (localizing phenomenon) of a fluorescent brightening agent is restrained to improve the dyeing/penetrating property of the fluorescent brightening agent into the whole clothing. <P>SOLUTION: The liquid detergent composition comprises: (a) 10-50 mass% nonionic surfactant comprising the compound represented by general formula (I): R-O(AO)<SB>n</SB>H (wherein R is a 8-22C hydrocarbon group; AO is a 2-4C oxyalkylene group; n is the number selected from 0, 1 and 2) by 6-11 mass% in the (a) component; (b) an anionic surfactant; and (c) 0.01-5 mass% fluorescent brightening agent. The ratio of (the content of (b) the anionic surfactant)/(the content of (a) the nonionic surfactant)=0.1-0.5. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a liquid detergent composition suitable for clothing.

  Optical brighteners are effective in increasing the whiteness of clothing such as cotton and are known for use in liquid detergents.

  When using a liquid detergent, it is generally known to apply it directly to severe dirt, but in the case of a liquid detergent containing a fluorescent brightener, this method deposits the fluorescent brightener on the applied part. However, it has been a problem that a phenomenon (spotting) occurs even after washing. Further, in such a case, not only the color unevenness occurs in the clothes, but also the localized brightening agent does not spread over the whole, so that the fluorescent whitening effect of the entire clothes also decreases.

  As a method for suppressing spotting, it is effective to add a large amount of nonionic surfactant (average added mole number of 5 mol or more), but there is a problem that the dyeing property of the entire garment is lowered. In addition, when an anionic surfactant is blended, the dyeing property to the entire clothing is improved, but there is a problem that spotting is deteriorated.

  Patent Document 1 discloses a technique for suppressing spotting by a combination of a fluorescent whitening agent, a cationic surfactant, and a nonionic surfactant, but there is still room for improvement in improving the dyeing property of the entire garment. . Patent Document 2 discloses a liquid detergent containing a specific fluorescent brightening agent, but its spotting suppression effect and dyeing property are not sufficient. Patent Document 3 discloses a liquid detergent containing a specific fluorescent whitening agent, a specific polymer, and highly dispersed silicic acid, but the spotting suppressing effect and dyeing property are not sufficient.

Thus, conventionally, there has been no liquid detergent system that has improved the level of dyeing of the entire garment while suppressing spotting of the optical brightener. Patent Document 4 discloses a liquid cleaning liquid having an adjusted foaming property containing two types of nonionic surfactants having different ethoxylation numbers and an optical brightener obtained by ethoxylation of alcohol having 12 to 20 carbon atoms. Agents are described. Patent Document 5 discloses a liquid detergent that uses a nonionic surfactant having a low ethylene oxide (hereinafter referred to as EO) addition mole number and a high EO addition mole number nonion, and has a distribution range of the low EO addition mole number. A liquid cleaning agent free from odor and odor, which is characterized by a narrow width, is described, and a fluorescent agent is disclosed as an optional component. In any case, nothing has been mentioned about the problem of the present invention.
JP 2001-254100 A Japanese Patent Laid-Open No. 2-20600 JP-A-2-73900 JP 50-22281 A JP 2000-355700 A

  This invention makes it a subject to provide the liquid detergent composition which can improve the dyeing | staining property of the whole clothing more, suppressing the spotting of a fluorescent whitening agent.

  The present invention provides (1) a liquid detergent composition containing the following components (a) to (c).

(A) 10 to 50% by mass of a nonionic surfactant containing 6 to 11% by mass of the compound represented by the following general formula (I) in component (a)
R—O (AO) _n H (I)
[Wherein, R is a hydrocarbon group having 8 to 22 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, and n is a number selected from 0, 1 and 2]
(B) Anionic surfactant (c) Optical brightener 0.01-5 mass%
(B) Content of anionic surfactant / (a) Content of nonionic surfactant = 0.1 to 0.5.

  The present invention further relates to (2) a polyoxyalkylene alkyl ether obtained by adding an alkylene oxide, preferably ethylene oxide or propylene oxide, to a higher alcohol having 8 to 22 carbon atoms as the component (a), and the general formula (I) The nonionic surfactant containing the compound represented by the above, wherein the peak value of the addition mole number distribution of the alkylene oxide of the nonionic surfactant is between 7 and 20, A liquid detergent composition as described in 1) is also provided.

  Furthermore, the present invention adds (3) (a) component (a-1) an average of 7 to 20 moles of an alkylene oxide having 2 to 4 carbon atoms to an alcohol having 8 to 22 carbon atoms in the alkyl group. An average of 1 to 4 alkylene oxides having 2 to 4 carbon atoms with respect to the polyoxyethylene alkyl ether type nonionic surfactant and (a-2) an alcohol having 8 to 22 carbon atoms in the alkyl group. A polyoxyalkylene alkyl ether type nonionic surfactant obtained by adding in a molar amount, containing 6 to 11% by mass of the compound represented by the general formula (I) in the component (a), and adding an alkylene oxide The liquid detergent composition according to the above (1), which is a nonionic surfactant having a peak number of at least 7 to 20 moles, is also provided.

  The liquid detergent composition of the present invention can further improve the dyeing property of the entire garment while suppressing spotting of the optical brightener.

<(A) component>
As the component (a) of the present invention, a nonionic surfactant that is a main substrate, which is generally known as a washing substrate for clothing, can be used. 6 to 11 % by mass of the compound represented by I) in the component (a).

R—O (AO) _n H (I)
[Wherein, R is a hydrocarbon group having 8 to 22 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, and n is a number selected from 0, 1 and 2]

The compound of the general formula (I) may be blended as a part of the component (a-1) or the component (a-2) described later, and is separately manufactured and used by adding to a specific nonionic surfactant. May be.
The present inventors have found that by using a nonionic surfactant containing a compound represented by the general formula (I), an excellent detergency can be exhibited without affecting the stability of the enzyme. It came to complete.

  R of the compound in the general formula (I) is a hydrocarbon group, but in the present invention, R is an alkyl group having 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms. AO is preferably an oxyethylene group or an oxypropylene group. In the present invention, the number of oxyalkylene groups represented by AO and the concentration thereof are particularly important.

  The content of the compound of the general formula (I) in the component (a) is 6% by mass or more, preferably 7% by mass in the nonionic surfactant from the viewpoint of detergency, and the phase stability of the liquid detergent. Therefore, it is 11 mass% or less, preferably 10 mass% or less.

  In general formula (I), the compound of n = 0 is a higher alcohol, but in the present invention, it may be expressed as “the number of added moles is 0”. This takes into account unreacted alcohol in the reaction step, but may be added separately in the present invention. However, since alcohol affects the odor and stability of the liquid phase, the compound of general formula (I) is preferably combined with a compound of n = 1 and / or 2, more preferably a compound of n = 1 and 2. Combine with it.

  In addition, although the compound of general formula (I) can be manufactured by a well-known manufacturing method, it is preferable to mix | blend as (a-2) component mentioned later. The compound of general formula (I) is analyzed by gas chromatography.

  As the nonionic surfactant other than the general formula (I) contained in the component (a), one kind selected from a hydrophobic group which is an alkyl group having 8 to 22 carbon atoms, a hydroxy group and a polyoxyethylene group A compound having the above hydrophilic group, specifically, polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene glycol fatty acid ester, polyoxyethylene polyoxypropylene Examples include block polymers, fatty acid alkanolamides, alkyl polyglycosides, polyhydroxy fatty acid amides, and polyglycerin monoalkyl ethers. In the present invention, polyoxyalkylene alkyl ether type nonionic surfactants shown below as the component (a-1) are particularly preferable.

The component (a-1) is preferably an alkylene oxide having 2 to 4 carbon atoms, preferably an ethylene oxide and / or propylene oxide on an average of 7 to 20 moles, more preferably an alcohol having 8 to 22 carbon atoms in the alkyl group. Is a polyoxyethylene alkyl ether type nonionic surfactant obtained by adding 7 to 18 mol, most preferably 8 to 15 mol. However, butylene oxide and propylene oxide, particularly propylene oxide average addition molar number of nonionic surface active agent obtained to become possible to impart hydrophobicity is less than or equal to 3, and the hydrophilic groups of the ethylene-les N'okishido The number is preferably less than the average added mole.

The number of carbon atoms of the alkyl group of the higher alcohol is preferably 10 to 18 and more preferably 12 to 16 from the viewpoints of stability and cleaning performance. The higher alcohol may be natural or synthetic, and the alkyl group of the component (a-1) is preferably derived from a primary alcohol. The average number of carbon atoms in the alkyl group is preferably from 10 to 18, more preferably from 10 to 16, 12 to 14 being most preferred. The average number of added moles of alkylene oxide is preferably 7-18, more preferably 8-15, from the viewpoints of phase solubility with the compound of general formula (I) and detergency.

  The component (a-1) is obtained by adding a specific range of alkylene oxide to 1 mole of the alcohol having the carbon number. Therefore, the component (a-1) is a specific alkylene oxide. Addition mole number (hereinafter sometimes referred to as AO addition mole number), especially in the case of ethylene oxide, AO addition starting from around the number of moles of ethylene oxide added to one mole of alkylene oxide alcohol used in the production process It becomes a mixture having a distribution of the number of moles. That is, in the distribution shown by the graph in which the added mole number of alkylene oxide, preferably ethylene oxide (and propylene oxide) is taken on the horizontal axis, and the mass percentage of the compound by the added mole number in component (a-1) is plotted on the vertical axis. In the present invention, the AO addition mole number of the compound having the highest content (hereinafter sometimes referred to as a peak value) is between 7 and 20, further between 7 and 18, particularly between 8 and 15. Mixtures are preferred.

  The component (a-1) is an alkylene oxide, preferably a compound having an average addition mole number of propylene oxide and ethylene oxide of 7 or more (provided that the average addition mole number of propylene oxide is 3 moles or less). It contains a small amount of compounds with the indicated addition moles of 0, 1 and 2. However, when ethylene oxide is added to an alcohol by a general method, the proportion of the unreacted alcohol or the compound having a low alkylene oxide addition mole number in the component (a-1) is very small. ) It is difficult to satisfy the conditions of the present invention only with the component.

  In addition, as described above, a compound having a low alkylene addition mole number is considered to be an unfavorable substance because it causes odor problems and phase separation, and unreacted alcohol is not included in commercially available nonionic surfactants. A nonionic surfactant with a narrow distribution range of alkylene oxide addition moles has been proposed by using a special catalyst in the production process so as not to be removed by distillation or to contain compounds with low addition moles. There is so much.

  (A) component of this invention mix | blends the compound of general formula (I) with (a-1) component, and does not impair detergency and stability peculiar to a low AO addition nonion. In this case, the component (a) is simply expressed as follows. That is, (a) a polyoxyalkylene alkyl ether obtained by adding an alkylene oxide, preferably ethylene oxide or propylene oxide, to a higher alcohol having 8 to 22 carbon atoms and a compound represented by the general formula (I) An ionic surfactant, wherein the nonionic surfactant has a peak value of the number of added moles of alkylene oxide of 7 to 20, preferably 7 to 18, more preferably 8 to 15; It is. In the present invention, the component (a-1) may be used in combination with a plurality of average added mole numbers. There may be a plurality of peak values in the specific range, or some of them may be outside the range, but the largest peak rises in a part of the range in the distribution of added moles of alkylene oxide. It is preferable.

  As described above, the component (a) is a nonionic surfactant comprising the component (a-1) and the compound of the general formula (I). In the present invention, the compound of the general formula (I) is represented by the following (a-2) It is particularly preferable to blend it as a component from the viewpoints of stability, ease of use and odor.

  That is, the component (a-2) has an average of 1 to 4 moles of alkylene oxide having 2 to 4 carbon atoms, preferably 1 to 1 average of ethylene oxide and / or ethylene oxide, with respect to the alcohol having 8 to 22 carbon atoms in the alkyl group. It is a polyoxyalkylene alkyl ether type nonionic surfactant obtained by adding ~ 4 mol.

  The number of carbon atoms of the alkyl group is preferably 8 to 18 and more preferably 8 to 16 from the viewpoint of stability. When using what mixed the alcohol of different carbon number as raw material alcohol, the average carbon number of the alkyl group of (a-1) component is 8-18, and 8-16 are preferable.

  In the component (a-2), the alkyl group is preferably a linear secondary alkyl group from the viewpoint of stability.

  The average added mole number of alkylene oxide is 1 to 4, preferably 2 to 4. When the average added mole number is within the above range, the enzyme stabilizing effect is high and the detergency is excellent. Further, the alkylene oxide of the component (a-2) is preferably one having only ethylene oxide or both ethylene oxide and propylene oxide. In that case, the average amount of propylene oxide is 2 mol or less, preferably 1 mol or less.

  The component (a-2) of the present invention is a compound obtained by adding alkylene oxide, particularly ethylene oxide in a ratio of 1 to 4 mol to 1 mol of alcohol (provided that 2 mol or less of ethylene oxide is converted to propylene oxide. They may be substituted), and they are a mixture of compounds having different numbers of added moles of alkylene oxide, and in particular, a mixture having an alkylene oxide added mole number of 0 to 10 accounts for 80% by mass or more. If the content of unreacted alcohol is high and the odor problem or the liquid phase stability is affected, a product obtained by reducing unreacted alcohol by distillation or the like may be used. In the distribution indicated by the graph in which the component (a-2) has an ethylene oxide (and propylene oxide) addition mole on the horizontal axis and the vertical axis represents the mass% of the compound by the number of added moles in the component (a-2), In the present invention, it is preferable that the most frequently added compound has a number of added moles (sometimes referred to as a peak value as described above) of 0 to 4 mol, particularly 1 to 4 mol. In addition, what added 1 mol of ethylene oxide turns into a compound with most unreacted alcohol in (a-2) component. The component (a-2) may be a mixture of two or more.

  When the component (a-2) is a polyoxyalkylene alkyl ether together with the component (a-1), nonionic surfactants having two different alkylene oxide addition mole number distributions are mixed. Therefore, in the distribution of the number of moles of alkylene oxide added to the individual compounds constituting the component (a), it is broader than that of generally produced compounds. Although the two distributions may overlap, in the graph showing the addition mole number distribution of the alkylene oxide of the mixture, a part of the ridge line near the low AO addition mole number of the component (a-1), specifically ( A distribution having a slight rise or peak in the peak value range of a-2) is preferred, and in particular, a mixture of distributions showing two peaks of component (a-1) and component (a-2). It is preferable.

  Therefore, the preferred component (a) of the present invention can also be expressed as follows. That is, (a) component (a-1) polyoxyethylene obtained by adding an average of 7 to 20 moles of alkylene oxide having 2 to 4 carbon atoms to an alcohol having 8 to 22 carbon atoms in the alkyl group It is obtained by adding an average of 1 to 4 moles of an alkylene group having 2 to 4 carbon atoms to an alkyl ether type nonionic surfactant and (a-2) an alcohol having an alkyl group having 8 to 22 carbon atoms. It consists of a polyoxyalkylene alkyl ether type nonionic surfactant, contains 6 to 11% by mass of the compound represented by the general formula (I) in the component (a), and has a peak value of at least 7 in terms of the number of added moles of alkylene oxide. A nonionic surfactant at ~ 20. In addition, the other when two peak values are seen is 0-4.

  (A) component is 10-50 mass%, Preferably it is 15-45 mass%, More preferably, it is 20-40 mass%, Comprising: The compounding ratio (mass of (a-1) component and (a-2) component Ratio) (a-2) / (a-1) is 0.05 to 0.4, preferably 0.1 to 0.25. When the ratio is equal to or higher than the lower limit value, the effect of suppressing spotting is high, and when the ratio is equal to or lower than the upper limit value, dyeing property to the entire clothing is good.

<(B) component>
As the anionic surfactant of the component (b), alkylbenzene sulfonic acid or a salt thereof, alkyl or alkenyl ether sulfate, alkyl or alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid or its Salts, alkyl or alkenyl ether carboxylates, α-sulfo fatty acid salts, or α-sulfo fatty acid esters. Of these, alkylbenzene sulfonic acids having 10 to 20 carbon atoms or salts thereof, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, fatty acids or salts thereof are preferable. In particular, fatty acids or salts thereof, particularly fatty acids having 8 to 14 carbon atoms or salts thereof are preferred from the viewpoint of washing performance in a drum washing machine.

  Examples of counter ions for anionic surfactants include alkaline earth metals such as magnesium and / or alkanolamines such as mono, di, and triethanolamine, in addition to alkali metals such as sodium and potassium. Liquid stability improves by using. Moreover, an anionic surfactant may be mix | blended in a composition with an acid form, and you may neutralize with the alkali agent (alkanolamine etc.) added separately.

  The component (a) and the component (b) are contained in a ratio of (b) component content / (a) component content = 0.1 to 0.5, and the ratio is 0.15 to 0. .4 is preferred. When the ratio is 0.1 or more, the dyeing property to the entire clothing is good, and when it is 0.5 or less, the effect of suppressing spotting is high. The regulation of these concentrations is the concentration when the component (b) is regarded as the acid type.

<(C) component>
As the fluorescent whitening agent of component (c), a fluorescent whitening agent having a sulfonic acid group or a salt thereof is preferable, and a biphenyl type fluorescent whitening agent and / or a stilbene type whitening agent is particularly preferable.

  Biphenyl type optical brighteners include 4,4′-bis (2-sulfostyryl) biphenyl dialkali metal salt (preferably sodium) and 4,4′-bis (2-sulfo-4chlorostyryl) biphenyl dialkali metal. A salt (preferably sodium) can be mentioned, and 4,4′-bis (2-sulfostyryl) biphenyl disodium is particularly preferable in terms of a whitening effect. As the stilbene type optical brightener, the compound of the general formula (1) (M is sodium) is particularly preferred.

  (C) The content rate in the composition of a component is 0.01-5 mass%, Preferably it is 0.05-3 mass%, More preferably, it is 0.1-0.2 mass%. If it is 0.01% by mass or more, the fluorescent whitening effect is good, and if it is 5% by mass or less, the blending stability is good.

<Other ingredients>
The composition of the present invention preferably contains a chelating agent. Examples of chelating agents include:
Aminopolyacetic acid or salts thereof such as nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexaacetic acid, diencoric acid,
Diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, oxydisuccinic acid, gluconic acid, carboxymethyl succinic acid, carboxymethyl tartaric acid and the like, or salts thereof,
Polyacrylic acid or salt thereof, polymaleic acid or salt thereof, carboxymethyl cellulose or salt thereof, acrylic acid-maleic acid copolymer or salt thereof, maleic anhydride-diisobutylene copolymer or salt thereof, maleic anhydride-methyl vinyl ether Copolymer or salt thereof, maleic anhydride-isobutylene copolymer or salt thereof, carboxylic acid polymer such as maleic anhydride-vinyl acetate copolymer or salt thereof, and claims of JP-A-59-62614 1 to 21 (page 1, column 3, line 5 to page 3, column 4, line 14),
Examples include aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylenephosphonic acid), and alkali metal or lower amine salts thereof.

  The mixing ratio of the chelating agent in the composition is from 0.1 to 5% by mass, preferably from 0.3 to 4% by mass, more preferably from 0.5 to 3% by mass when regarded as the acid type.

  The liquid detergent composition of the present invention preferably contains an alkaline agent. In addition to alkali metal hydroxides, alkali metal carbonates, etc., the alkali agent can include alkanolamines having 2 to 4 carbon atoms and alkanol groups having 1 to 3 alkanol groups, which are common in liquid detergents. . Of these, the alkanol is preferably a hydroxyethyl group. Except for the alkanol group, they are a hydrogen atom, a methyl group or an ethyl group. In the present invention, monoethanolamine and triethanolamine are preferable, and monoethanolamine is particularly preferable.

  The alkaline agent can be used as a pH adjuster described later. Moreover, although it may mix | blend as a counter salt of above-mentioned (b) component, (c) component, and (g) component, the presence of an alkali agent is judged by the pH of 25 degreeC of a composition showing alkaline. be able to.

  In this invention, Preferably alkanolamine is contained 0.5-8 mass%, More preferably, 1-5 mass% is contained.

In the composition of the present invention, components that are conventionally known to be blended in liquid detergents can be blended. For example , alcohols such as ethanol and propanol, glycols such as ethylene glycol, diethylene glycol, propylene glycol, and diethylene glycol monobutyl ether, which have a molecular weight of 200 to several thousand, are classified as so-called solvents as thickeners and solubilizers. Polyalkylene glycols such as low molecular weight polyethylene glycol and polypropylene glycol, polyoxyalkylene benzyl ether, polyoxyalkylene phenyl ether (phenoxyethanol, polyoxyethylene alkylphenyl ether [EO average addition mole number 0 to 5]), etc .; solvent As other phase modifiers, so-called hydrotropes, para-toluenesulfonic acid, benzoates (also effective as preservatives), urea, etc .; Polyacrylic acid, acrylic acid-maleic acid copolymer as the agent, polymer described in claims 1 to 21 (page 1, column 3, line 5 to page 3, column 4, line 14) of JP-A-59-62614, etc. Polymers having carboxylic acid groups, etc .; Polyvinyl pyrrolidone, etc. as a color transfer inhibitor; Tinopearl CBS (made by Ciba Specialty Chemicals), Whitetex SA (made by Sumitomo Chemical), etc. as fluorescent dyes; Target silicone, cationic surfactant; silica, silicone as antifoaming agent; enzymes such as protease, cellulase, pectinase, amylase and lipase; enzyme stabilizer such as calcium chloride; butylhydroxytoluene as antioxidant , Distyrenated cresol, sodium sulfite, sodium bisulfite, etc .; coloring agent; fragrance; antibacterial antiseptic Etc. The.

  The composition of this invention mix | blends water with said each component. Water is the adjustment amount which makes the whole 100 mass%.

  The pH of the composition of the present invention (7.2 of JIS Z 8802) is preferably 6.0 to 11.0 (25 ° C.). The pH is adjusted with a known alkali or acid.

  The components shown in Tables 1 and 2 were mixed to obtain compositions of Examples and Comparative Examples. The following evaluations were performed using the obtained compositions. The results are shown in Tables 1 and 2. The pH was adjusted with an aqueous sodium hydroxide solution and an aqueous hydrochloric acid solution.

[Evaluation of spotting suppression effect and dyeing property of fluorescent whitening agent]
10 cotton fabrics (gold width # 2003) of 8 cm × 8 cm unstained optical brightener were prepared, and for each of these 5 sheets, 0.3 g / sheet each of the cleaning compositions shown in Table 1 was spided. It was applied by dropping in the middle of the cloth. After leaving for 5 minutes, a total of 10 cotton cloths with 5 detergents and 5 uncoated cotton cloths were put together and washed with a tartometer (water 1L, hardness 71.2 mg CaCO ₃ , water temperature 20 ° C., 100 r / min, 10 minutes). Thereafter, 10 cotton cloths were rinsed with running tap water for 5 minutes, dehydrated and naturally dried indoors. And each IF value was measured about 5 cloth which applied the cleaning composition directly, and 5 cloth which has not been applied. The spotting inhibition index was measured from the following formula. The dyeing index is an average value of IF values of five uncoated sheets.

Spotting suppression index = [average of IF values of five coated fabrics] − [average of IF values of five uncoated fabrics]
The IF value was measured using a spectral color / whiteness meter PF-10 (manufactured by Nippon Denshoku Industries Co., Ltd.). The IF value is a difference in ISO whiteness obtained when the UV cut filter of the apparatus is passed (UV-IN side) and not passed (UV-OUT side). The ISO whiteness is described in ISO Brightness (ISO 2470: 1999), and can be measured using the measuring device.

  By measuring the IF value and determining the spotting inhibition index, the degree of dyeing of the fluorescent dye from the cotton fabric coated with the liquid detergent composition to the uncoated cotton fabric in the washing process can be examined. The suppression effect can be confirmed. A composition showing a result that the spotting inhibition index is 1.5 or less and the dyeability index is 5 or more is preferable as a cleaning agent for clothing.

(A) Component (Note)
(A-1) Component (a-1-1): Nonionic surfactant having a peak value of 11 obtained by adding 10 moles of EO to primary alcohol having 10 to 14 carbon atoms on average -1-2): Non-reacting surfactant (Softanol 70; ) Made by Nippon Shokubai)
(A-1-3): A primary alcohol having 10 to 14 carbon atoms in which EO is added in an average of 7 moles, PO is added in an average of 2 moles, and EO is added in an average of 3 moles in the order of EO and PO. Nonionic surfactant (a-1-4) having a peak value of 12 among the number of moles added: EO is added to primary alcohols having 10 to 14 carbon atoms in the order of an average of 10 moles of PO and an average of 1 mole of PO. Nonionic surfactant (a-2) component (a-2-1) having a peak value of 12 among the total number of moles of EO and PO added: secondary alcohol having 12 to 14 carbon atoms A nonionic surfactant (Softanol 33; manufactured by Nippon Shokubai Co., Ltd.) that has an average of 3 mol of EO added to it and does not contain unreacted alcohol and has a peak value of 3.
(A-2-2): A nonionic surfactant having an average of 1 mol of EO added to a primary alcohol having 10 to 14 carbon atoms and having a peak value of 0.
(A-2-3): A nonionic surfactant having an average of 4 moles of EO added to a primary alcohol having 10 to 14 carbon atoms and having a peak value of 3.
(A-2-4): Nonionic surfactant obtained by adding 1 mole of PO to lauryl alcohol on average and having a peak value of 1.

(A-2-5): Non-ionic surfactant having an average of 1 mol of EO and an average of 1 mol of PO added to a secondary alcohol alcohol having 12 carbon atoms and having a peak value of 1 Note: General formula The ratio shown by (I) is shown in Tables 1 and 2. In the compositions of Tables 1 and 2, the peak value of the AO addition mole number distribution in the nonionic surfactant of the component (a) was the same as the peak value of the component with the largest amount.
(B) Component (b-1): Polyoxyethylene alkyl ether sulfate (linear alkyl having 10 to 14 carbon atoms, EO average addition mole number 3, sodium salt)
(B-2): Linear alkylbenzene sulfonic acid having 10 to 14 carbon atoms (b-3): Fatty acid Lunac L-55 (manufactured by Kao Corporation)
(C) Component (c-1): Tinopearl CBS-X; fluorescent dye, distyrylbiphenyl compound (manufactured by Ciba Specialty Chemicals)
(C-2): Tinopearl AMS-GX; fluorescent dye, bis- (triazinylamino) -stilbene-disulfonic acid compound (manufactured by Ciba Specialty Chemicals)
(Other ingredients)
Polymer (1): Polymer compound synthesized by the method of Synthesis Example 1 on page 4, paragraph 0020 of JP-A-10-60476. Polymer (2): Polyethylene glycol (average molecular weight 2000)
Enzyme: Everase 16.0L-EX (protease, Novozyme)
Dye (1): Kayashi Ontakis ENA
Dye (2): Green No. 202 pH adjuster; hydrochloric acid aqueous solution or sodium hydroxide (mixed to adjust stock solution pH) aqueous solution.

Claims (1)

A liquid detergent composition containing the following components (a) to (c):
(A) (a-1) Polyoxyalkylene alkyl ether type obtained by adding an average of 7 to 20 moles of an alkylene oxide having 2 to 4 carbon atoms to an alcohol having 8 to 22 carbon atoms in the alkyl group Obtained by adding 1 to 4 moles of an average of 1 to 4 moles of an alkylene oxide having 2 to 4 carbon atoms of an alkylene group to a nonionic surfactant and (a-2) an alcohol having 8 to 22 carbon atoms of an alkyl group. Polyoxyalkylene alkyl ether type nonionic surfactant, and the compounding ratio (mass ratio) (a-2) / (a-1) of the component (a-1) and the component (a-2) is 0. 1 to 0.4, containing 6 to 11% by mass of the compound represented by the following general formula (I) in the component (a) , and having a peak value of the added mole number of alkylene oxide of at least 7 to 20 World 10-50% by mass of surfactant
R—O (AO) _n H (I)
[Wherein, R is a hydrocarbon group having 8 to 22 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, and n is a number selected from 0, 1 and 2]
(B) an anionic surfactant (c) a fluorescent whitening agent from 0.01 to 0.2 wt%
Containing
(B) Content of anionic surfactant / (a) Content of nonionic surfactant = 0.23 to 0.5.