Liquid detergent composition for hand washing dishes

Abstract

The objective is to provide a liquid detergent composition for hand washing dishes that offers excellent cleaning performance, suppresses discoloration, and is gentle on the hands. [Solution] A liquid dishwashing detergent composition comprising: (A) component: a non-soap-based anionic surfactant; (B) component: one or more surfactants selected from semi-polar surfactants and amphoteric surfactants; (C) component: polyethyleneimine (excluding those containing an oxyalkylene group); and (D) component: an alkanolamine, wherein the content of component (A) is 1 to 20% by mass of the total mass of the liquid dishwashing detergent composition.

Description

[Technical Field]

[0001] This invention relates to a liquid detergent composition for hand washing dishes. [Background technology]

[0002] Liquid dishwashing detergent compositions used for handwashing are required to have various functions in addition to effectively removing oily stains, such as good lathering. For example, Patent Document 1 proposes a liquid dishwashing detergent composition comprising positively charged polyethyleneimine, one or more anionic surfactants, an amine oxide, a surfactant containing betaine or sultaine, and less than 0.5% by mass of cocamide DEA. According to the invention of Patent Document 1, stabilization of bubbles is achieved. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-123886 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, liquid dishwashing detergent compositions using polyethyleneimine had a problem: they would yellow in color when stored under high-temperature conditions (e.g., above 40°C). In addition, liquid detergent compositions for hand washing dishes are required to be gentle on the hands. Factors that contribute to the feeling of gentleness on the hands include a "feeling of retention" where some components remain on the surface of the hands, giving a protected feeling, and the "lack of dryness" of the hands after washing dishes. It is desirable that liquid detergent compositions for hand washing dishes provide these effects. However, the invention in Patent Document 1 does not consider gentleness on the hands. Therefore, an object of the present invention is to provide a liquid dishwashing detergent composition that has excellent detergency, suppresses discoloration, and can provide a gentle feeling on the hands.

Means for Solving the Problems

[0005] The present invention has the following aspects. <1> (A) component: a non-soap anionic surfactant, and (B) component: one or more surfactants selected from semi-polar surfactants and amphoteric surfactants, and (C) component: polyethyleneimine (excluding those containing an oxyalkylene group), and (D) component: an alkanolamine, and A liquid dishwashing detergent composition containing where the content of the (A) component is 1 to 20% by mass based on the total mass of the liquid dishwashing detergent composition for handwashing dishes. <2> The liquid dishwashing detergent composition according to <1>, wherein the mass ratio represented by the (A) component / the (B) component is 0.1 to 10. <3> The liquid dishwashing detergent composition according to <1> or <2>, wherein the mass ratio represented by the (A) component / [(B) component + (C) component] is 0.1 to 9. <4> Furthermore, the liquid dishwashing detergent composition according to any one of <1> to <3>, which further contains (E) component: a nonionic surfactant. <5> Furthermore, the liquid dishwashing detergent composition according to any one of <1> to <4>, which further contains (F) component: one or more selected from lactic acid and its salts.

Effects of the Invention

[0006] According to the liquid dishwashing detergent composition of the present invention, it has excellent detergency, suppresses discoloration, and can provide a gentle feeling on the hands.

Modes for Carrying Out the Invention

[0007] (Liquid detergent composition for hand washing dishes) The liquid detergent composition for hand washing dishes of the present invention (hereinafter sometimes simply referred to as "liquid detergent composition") is a composition containing components (A) to (D).

[0008] <(A) component> Component (A) is a non-soap-based anionic surfactant. By containing component (A), the liquid detergent composition can enhance its cleaning power against oily stains and improve its staying power.

[0009] (A) Examples of component (A) include α-olefin sulfonic acid or its salt, linear alkyl sulfate ester or its salt, branched alkyl sulfate ester or its salt, alkyl ether sulfate ester or its salt, alkenyl ether sulfate ester or its salt, alkane sulfonic acid or its salt, α-sulfo fatty acid ester or its salt, etc.

[0010] Examples of salt forms of component (A) include alkali metal salts such as sodium salts and potassium salts, and alkanolammonium salts such as monoethanolammonium salts and diethanolammonium salts. Examples of salts of component (A) include alkali metal salts, alkaline earth metal salts, ammonium ions, and alkanolamine salts.

[0011] Among the components (A) described above, alkyl ether sulfate ester or its salt (AES), alkane sulfonic acid or its salt, and α-olefin sulfonic acid or its salt (AOS) are preferred.

[0012] As the alkyl ether sulfate ester or its salt, a compound represented by the following formula (a1) (polyoxyalkylene alkyl ether sulfate salt) is preferred. R 1 -O-(EO) n -SO3-M + ...(a1) (In formula (a1), R 1is a linear alkyl group having 8 to 18 carbon atoms, and the carbon atom bonded to the oxygen atom is a primary carbon atom. EO is an oxyethylene group, n represents the average number of moles of EO added, 0 < n ≤ 4, and M + is a cation.)

[0013] In formula (a1), R 1 preferably has 10 to 14 carbon atoms, more preferably 12 to 14 carbon atoms. Among them, R 1 is preferably an alkyl group derived from an oil and fat raw material. Suitable oil and fat raw materials include palm kernel oil, coconut oil, and the like.

[0014] M + includes a hydrogen atom; alkali metal ions such as sodium and potassium; alkaline earth metal ions such as magnesium and calcium; alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine. Among these, alkali metal ions are preferred, and sodium ions are more preferred. When M + is a divalent cation, the number of M + is the number multiplied by 1 / valence and is combined with SO3 - . For example, when M + is a magnesium ion, the number of M + is 1 / 2.

[0015] Suitable polyoxyalkylene alkyl ether sulfates or their salts include sodium polyoxyethylene (1) linear alkyl (C12 / 14 = 75 / 25; derived from natural oils and fats) sulfate. Note that "C12 / 14 = 75 / 25" indicates that the mass ratio of the compound having 12 carbon atoms in R 1 to the compound having 14 carbon atoms in R 1 is 75:25.

[0016] Examples of the alkane sulfonic acid or its salt include an alkane sulfonic acid having 10 to 20 carbon atoms or its salt, preferably an alkane sulfonic acid having 14 to 17 carbon atoms or its salt, and particularly preferably a secondary alkane sulfonic acid (SAS) having 14 to 17 carbon atoms or its salt.

[0017] Examples of α-olefin sulfonic acid or its salts include α-olefin sulfonic acid having 10 to 20 carbon atoms or its salts, with α-olefin sulfonic acid having 14 to 16 carbon atoms or its salts being more preferred.

[0018] In particular, component (A) preferably contains at least one of AES and AOS, more preferably contains AES, and even more preferably contains both AES and AOS.

[0019] (A) The content of component (A) is preferably 1 to 20% by mass, more preferably 1 to 15% by mass, and even more preferably 5 to 10% by mass, relative to the total mass of the liquid detergent composition. If the content of component (A) is above the lower limit, the cleaning power against oily stains is further enhanced and the feeling of staying on the skin is further enhanced. If the content of component (A) is below the upper limit, the feeling of dryness is further reduced and gelation and separation can be suppressed more effectively (liquid stability is further enhanced).

[0020] (A) When component contains both AES and AOS, the mass ratio expressed as AOS / AES (AOS / AES ratio) is preferably 0.2 to 6, more preferably 0.25 to 4, and even more preferably 0.5 to 2. If the AOS / AES ratio is above the lower limit, precipitates increase during washing, which further enhances the feeling of retention on the skin. If the AOS / AES ratio is below the upper limit, precipitates increase during washing, which further enhances the feeling of retention on the skin, and further enhances the cleaning power against oily stains.

[0021] <(B) component> Component (B) is one or more surfactants selected from semi-polar surfactants (component (b1)) and amphoteric surfactants (component (b2)). By containing component (B), the liquid detergent composition can further enhance its cleaning power against oily stains. (b1) Component refers to a substance that becomes cationic or nonionic depending on the pH of the solution in which it is dissolved or the dispersion system in which it is dispersed.

[0022] (b1) Examples of components include alkylamine oxide type semipolar surfactants and alkylamidoamine oxide type semipolar surfactants. (b1) The compound represented by the following formula (b1) is preferred as component (b1).

[0023] R 2 -(A) p -N(-R 3 )(-R 4 )→O ···(b1)

[0024] [R in equation (b1) 2 R is a linear or branched alkyl group having 8 to 18 carbon atoms or an alkenyl group having 8 to 18 carbon atoms. 3 and R 4 Each of these is independently an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and A is -C=O(-NH-R 5 )- represents R 5 [where p is an alkylene group with 1 to 4 carbon atoms, and p is an integer between 0 and 1.]

[0025] R in equation (b1) 2 The number of carbon atoms is preferably 10 to 14, and more preferably 12 to 14. 2 Preferably, it is an alkyl group derived from oil and fat raw materials. R 3 , R 4 Each of these is independently preferably a C1-C3 alkyl group or a C1-C3 hydroxyalkyl group, more preferably a C1-C3 alkyl group, and even more preferably a methyl group. 2 and R 3 It is particularly preferable that all of them are methyl groups. p is preferably 0. Among these, lauryldimethylamine oxide and amidopropyldimethylamine oxide are more preferred, and lauryldimethylamine oxide is even more preferred, from the viewpoint of suppressing odor retention on the object to be cleaned and shortening the cleaning time of the object to be cleaned.

[0026] (b2) Examples of components include carboxylate-type amphoteric surfactants, sulfate-type amphoteric surfactants, sulfonate-type amphoteric surfactants, and phosphate-type amphoteric surfactants. Among these, carboxylate-type amphoteric surfactants and sulfonate-type amphoteric surfactants are preferred. Examples of carboxylate-type amphoteric surfactants include betaine-type amphoteric surfactants such as lauryldimethylaminoacetic acid betaine, coconut alkyldimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl betaine, lauric acid amidopropyl dimethylaminoacetic acid betaine, coconut alkylamidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine), and lauryldimethylsulfobetaine. Examples of sulfonate-type amphoteric surfactants include betaine-type amphoteric surfactants such as lauryl hydroxysulfobetaine.

[0027] The aforementioned component (B) may be a single type or a combination of two or more types. As component (B), component (b1) is preferred, a compound represented by formula (b1) is more preferred, lauryldimethylamine oxide and amidopropyldimethylamine oxide are even more preferred, and lauryldimethylamine oxide is particularly preferred.

[0028] (B) The content of component (B) is preferably 1 to 20% by mass, more preferably 2 to 15% by mass, and even more preferably 3 to 12% by mass, relative to the total mass of the liquid detergent composition. When the content of component (B) is within the above range, precipitates increase during washing, further enhancing the feeling of retention on the skin. When the content of component (B) is above the lower limit, the cleaning power against oily stains can be further enhanced. When the content of component (B) is below the upper limit, the liquid stability can be further enhanced.

[0029] The ratio of the content of component (A) to the content of component (B), expressed as the mass ratio (A / B ratio) of component (A) / component (B), is preferably 0.2 to 10, more preferably 0.5 to 5, and even more preferably 0.8 to 2. When the A / B ratio is within the above range, precipitates increase during washing, further enhancing the feeling of retention on the skin. When the A / B ratio is above the lower limit, the cleaning power against oily stains is further enhanced. When the A / B ratio is below the upper limit, the liquid stability is further enhanced.

[0030] <(C) component> Component (C) is polyethyleneimine (excluding those containing oxyalkylene groups). The liquid cleansing composition can enhance the feeling of staying on the skin by containing component (C).

[0031] Polyethyleneimines are polymers obtained by polymerizing ethyleneimine. Typically, some of the nitrogen atoms in the main chain act as branching points, forming a branched or network structure, and containing one or more primary, secondary, or tertiary amino groups within that structure. The amine groups in the polyethyleneimine backbone are primary, secondary, or tertiary. The polyethyleneimine backbone can have a linear, branched, dendritic, or comb-like structure and can have a weight-average molecular weight of 100-2,000 g / mol, 200-1,500 g / mol, 300-1,000 g / mol, 400-800 g / mol, or 500-700 g / mol.

[0032] The amine group of the main chain of component (C) is either primary, secondary, or tertiary, and is a mixture containing one or more primary, secondary, and tertiary amine groups. The combination of primary, secondary, and tertiary amine substituents can be in any ratio, for example, about 1:1:1 to about 2:2:1, and branched every 3 to 3.5 nitrogen atoms along the main chain or branched chain segments. Alternatively, the amine group of the main chain may be primarily one of the primary, secondary, or tertiary amine substituents.

[0033] Examples of polyethyleneimines or their main chains include compounds represented by the following formulas (c1) to (c3). In formulas (c1) and (c2), the wavy lines indicate the bond positions with adjacent groups.

[0034] [ka]

[0035] [ka]

[0036] [ka]

[0037] The weight-average molecular weight of component (C) is preferably 100 to 5,000,000, more preferably 4,000 to 5,000,000, and even more preferably 500,000 to 3,000,000. When the average molecular weight of component (C) is within the above range, precipitates increase during washing, which further enhances the feeling of retention on the skin. (C) The weight-average molecular weight of component C refers to the value obtained by gel permeation chromatography (GPC) using polyethylene glycol as the standard substance.

[0038] Component (C) may be a modified polyethyleneimine. That is, component (C) may be a modified polyethyleneimine. (C) Component may be used alone or in combination of two or more as appropriate. (C) As for component (C), modified polyethyleneimine is preferred from the viewpoint of enhancing the feeling of retention on the skin.

[0039] Modified polyethyleneimines refer to those obtained by the reaction of some or all of the primary or secondary amino groups in polyethyleneimine with other compounds, or by the reaction of ethyleneimine with other polymers. Examples of modified polyethyleneimines include amide derivatives of polyethyleneimine, alkyl polyethyleneimines, quaternary polyethyleneimines, and polyethyleneimines with hydroxyl groups substituted at the ends. In addition, modified polyethyleneimines described in Japanese Patent Publication No. 60-221088, Japanese Patent Publication No. 59-198190, Japanese Patent Publication No. 62-271791, Japanese Patent Publication No. 58-120879, Japanese Patent Publication No. 60-135585, Japanese Patent Publication No. 60-78906, U.S. Patent No. 3,642,572, U.S. Patent No. 4,144,123, U.S. Patent No. 4,371,674, etc., can be used as modified polyethyleneimines.

[0040] (C) Examples of ingredients include: product names "Lupasol FG" (BASF), "Lupasol G20" (BASF), "Lupasol G35" (BASF), "Lupasol G100" (BASF), "Lupasol HF" (BASF), "Lupasol PS" (BASF), "Lupasol SK" (BASF), "Lupasol SKA" (BASF), "Lupasol PN 50" (BASF), "Lupasol PN 60" (BASF), "Epomin SP-003" (Nippon Shokubai Co., Ltd.), "Epomin SP-006", "Epomin SP-012" (Nippon Shokubai Co., Ltd.), "Epomin SP-018" (Nippon Shokubai Co., Ltd.), "Epomin Examples include "SP-200" (manufactured by Nippon Shokubai Co., Ltd.) and the product name "Epomin HM-2000" (manufactured by Nippon Shokubai Co., Ltd.). Of these, "Lupasol SK", "Lupasol SKA", "Lupasol PN 50", and "Lupasol PN 60" are modified polyethyleneimines. (C) As for the ingredients, from the viewpoint of enhancing the feeling of retention on the skin, the following BASF products are preferred: "Lupasol G 100", "Lupasol HF", "Lupasol PS", and "Lupasol SK", more preferably "Lupasol PS" and "Lupasol SK", and even more preferably "Lupasol SK".

[0041] (C) The content of component (C) is preferably 0.02 to 2.5% by mass, more preferably 0.3 to 1.5% by mass, and even more preferably 0.5 to 1% by mass, based on the total mass of the liquid detergent composition. If the content of component (C) is above the lower limit above, the feeling of retention on the skin can be further enhanced. If the content of component (C) is below the upper limit above, yellowing can be suppressed more effectively.

[0042] The ratio of the content of component (A) to the total amount of the content of component (B) and the content of component (C) (BC amount), and the mass ratio (A / BC ratio) expressed as (A) component / [(B) component + (C) component], is preferably 0.1 to 9, more preferably 0.5 to 5, and even more preferably 0.8 to 2. When the A / BC ratio is within the above range, the interaction between the anionic surfactant and the cationic component is enhanced, further increasing the cleaning power against oily stains, and the amount of precipitates produced during washing increases, further enhancing the feeling of retention on the skin.

[0043] <(D) component> Component (D) is an alkanolamine. The liquid detergent composition can suppress yellowing by containing component (D). Examples of component (D) include monoalkanolamines, dialkanolamines, trialkanolamines, and 2-amino-hydroxymethyl-1,3-propanediol (trometamol). Component (D) preferably includes an alkanolamine containing a primary amine, and more preferably a monoethanolamine.

[0044] The content of component (D) is preferably 0.3 to 2% by mass, and more preferably 0.7 to 1.5% by mass, relative to the total mass of the liquid detergent composition. If the content of component (D) is above the lower limit, the feeling of retention on the skin can be further enhanced and yellowing can be suppressed more effectively. If the content of component (D) is below the upper limit, the liquid stability can be further enhanced.

[0045] <(E) component> The liquid cleansing composition may contain component (E). Component (E) is a nonionic surfactant. By containing component (E), the liquid cleansing composition can further enhance the feeling of staying on the skin.

[0046] Component (E) is not particularly limited as long as it can be conventionally incorporated into liquid detergent compositions, but examples include polyoxyalkylene-added nonionic surfactants and alkyl polyglycosides. Among these, polyoxyalkylene-added nonionic surfactants are preferred as component (E), and polyoxyalkylene alkyl ethers are more preferred.

[0047] As component (E), a polyoxyalkylene alkyl ether having a branched alkyl group is preferred, and a Garbet alcohol-type nonionic surfactant represented by the following formula (e1) (component (e1)) is more preferred.

[0048] R 15 -CH(R 16 )-CH2-O-(R 17 O)qH ···(e1) [In formula (e1), R 15 and R 16 Each of these is an independently chain-like monovalent hydrocarbon group, and R 15 and R 16 The total number of carbon atoms is 4 to 16, R 17 is a hydrocarbon group having 1 to 3 carbon atoms, and q is R 17 This is a number between 1 and 20 that indicates the average number of repetitions of O.

[0049] (e1) Component is hydrophobic (R 15 -CH(R 16The structure of (e1)-CH2- is bulky. As a result, when component (e1) is adsorbed onto hydrophobic substances such as oil stains, the total amount of activators lined up at the stain interface is reduced, while the ability to reduce interfacial tension is increased.

[0050] (e1) Examples of component (e1) include 2-propylheptyl alcohol ethoxylate. As a commercially available product of component (e1), BASF's product name "Lutensol XP-100" is preferred.

[0051] If the liquid detergent composition contains component (E), the content of component (E) is preferably 1 to 15% by mass, and more preferably 2 to 12% by mass, relative to the total mass of the liquid detergent composition. When the content of component (E) is within the above range, the amount of precipitates increases during washing, which further enhances the feeling of retention on the skin.

[0052] <(F) component> The liquid detergent composition may contain component (F). Component (F) is one or more selected from lactic acid and its salts (lactic acid (salt)). By containing component (F), the liquid detergent composition can provide a non-drying effect (reduce the feeling of dryness).

[0053] Examples of salts constituting component (F) include sodium salts. Sodium lactate is more preferred as component (F).

[0054] If the liquid detergent composition contains component (F), the content of component (F) is preferably 0.5 to 10% by mass, more preferably 1 to 8% by mass, and even more preferably 2 to 7.5% by mass, based on the total mass of the liquid detergent composition. If the content of component (F) is above the lower limit, the feeling of dryness can be further reduced. If the content of component (F) is below the upper limit, the cleaning power against oil stains can be further enhanced.

[0055] <Other ingredients> The liquid detergent composition may contain other components (optional components) besides components (A) to (F). Optional ingredients include water, surfactants other than components (A), (B), and (E) (optional surfactants), hydrotropes, preservatives, inorganic builders, pH adjusters, chelating agents, isothiazolinone and its derivatives, fragrances, dyes, thickeners, etc.

[0056] The water content is preferably 40 to 85% by mass, and more preferably 60 to 80% by mass, relative to the total mass of the liquid detergent composition. If the water content is above the lower limit, gelation can be further suppressed. If the water content is above the lower limit, the viscosity will not become too low, resulting in excellent usability.

[0057] Examples of optional surfactants include cationic surfactants and soaps (fatty acid salts with 8 to 22 carbon atoms). The total mass of the surfactants containing components (A), (B), and (E) is preferably 10 to 40% by mass, and more preferably 15 to 35% by mass, relative to the total mass of the liquid detergent composition.

[0058] Examples of hydrotropes include monohydric alcohols with 1 to 3 carbon atoms and p-toluenesulfonic acid. When the liquid detergent composition contains a hydrotrope agent, the hydrotrope agent content is preferably 0.5 to 6% by mass, and more preferably 1 to 4% by mass, relative to the total mass of the liquid detergent composition.

[0059] Examples of isothiazolinones and their derivatives include methylisothiazolinone (MIT), chloromethylisothiazolinone (CMIT), 1,2-benzoisothiazolu-3-one (BIT), and 4-formylphenylboronic acid (4FPBA). Isothiazolinone and its derivatives may be used individually or in combination of two or more types. When the liquid detergent composition contains isothiazolinone and its derivatives, the content of isothiazolinone and its derivatives is preferably 0.002 to 0.02% by mass, more preferably 0.005 to 0.018% by mass, and even more preferably 0.009 to 0.015% by mass, based on the total mass of the liquid detergent composition.

[0060] Examples of inorganic builders include metal oxides. Examples of metal oxides include zinc oxide and magnesium oxide. If the liquid detergent composition contains an inorganic builder, the inorganic builder content is preferably 0.01 to 5.0% by mass relative to the total mass of the liquid detergent composition.

[0061] Examples of pH adjusters include inorganic alkaline agents, organic alkaline agents, and inorganic acids. Examples of inorganic alkaline agents include sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate. Examples of organic alkali agents include amine compounds such as monoethanolamine, diethanolamine, triethanolamine, N-methylpropanol, 2-amino-2-methyl-1-propanol, N-(β-aminoethyl)ethanolamine, diethylenetriamine, morpholine, and N-ethylmorpholine. Examples of inorganic acids include sulfamic acid, hydrochloric acid, and sulfuric acid. Examples of organic acids include acetic acid.

[0062] <Physical properties> The pH of the liquid detergent composition of the present invention at 25°C is preferably 6 to 8. If the pH of the liquid detergent composition at 25°C is within the above range, sliminess can be suppressed. The pH (25°C) of the liquid detergent composition is the value measured according to the method specified in JIS Z 8802:2011 "Method for Measuring pH".

[0063] The viscosity of the liquid detergent composition of the present invention at 25°C is preferably 10 to 250 mPa·s, and more preferably 50 to 200 mPa·s. If the viscosity is above the lower limit, dripping from the container spout can be effectively suppressed. If the viscosity is below the upper limit, the liquid detergent composition can be dispensed more easily from the container.

[0064] The viscosity of the liquid detergent composition can be adjusted by controlling the water content, adding thickeners, etc. The viscosity of the liquid detergent composition is measured at 25°C using a B-type viscometer, with rotor number No. 1 and rotor speed of 60 rpm, 60 seconds after the start of rotor rotation.

[0065] (Manufacturing method) The liquid detergent composition of the present invention is manufactured by conventionally known manufacturing methods. One method for producing a liquid detergent composition is to add component (A), component (B), component (C), component (D), and other components to a portion of water, mix them, adjust the pH, and then add the remainder of the water.

[0066] (How to use) One method of using the liquid detergent composition is to apply the liquid detergent composition to a cleaning tool, lather the liquid detergent composition on the cleaning tool, and then scrub the object to be cleaned with the lathered cleaning tool. Alternatively, one method is to dissolve the liquid detergent composition in water to make a cleaning solution, and then immerse the object to be cleaned in the cleaning solution while scrubbing it with a cleaning tool. In either method, the object to be cleaned is rinsed with water after scrubbing, and then the water is drained from the object.

[0067] Examples of cleaning tools include single-layer sponges, scrubbing sponges, and mesh sponges.

[0068] Examples of items to be washed include ceramics and metal utensils. Examples of ceramics include tableware such as plates, bowls, and donburi bowls. Examples of metal utensils include tableware such as forks and spoons, and stainless steel sinks.

[0069] As described above, the liquid detergent composition of the present invention contains components (A) to (D), and therefore has excellent cleaning properties, suppresses discoloration, and provides gentleness to the hands. The liquid detergent composition of the present invention is thought to provide a feeling of retention when applied to a cleaning tool such as a sponge and lathered with water, causing a complex of anionic component (A) and cationic component (C) to precipitate and remain on the skin. Furthermore, since the complex of components (A) and (C) is dispersed in the formulation before use, it is thought to have excellent liquid stability. [Examples]

[0070] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description.

[0071] (Raw materials used) <(A) component> a-1: Alkyl ether sulfate (AES), polyoxyethylene (1) linear alkyl (C12 / 14=75 / 25 (mass ratio), derived from natural oils) sulfate sodium salt, manufactured by Lion Corporation as "BRES(1)". a-2: Sodium α-olefin sulfonate (AOS) with 14 carbon atoms, "Lipolan LB-440" manufactured by Lion Specialty Chemicals. a-3: Secondary alkanesulfonate sodium (SAS) with 14 to 17 carbon atoms, manufactured by Clariant Japan, "HOSTAPUR® SAS30A".

[0072] <(B) component> • b-1: Alkylamine oxide (AAO) having a linear alkyl group with 12 carbon atoms, "Kadenax DM12D-W(C)" manufactured by Lion Specialty Chemicals. • b-2: Amidopropyl dimethylamine oxide (APDMAO), manufactured by Clariant Japan, "GENAMINOX AP". b-3: Lauric acid amidopropyl betaine (LPB), manufactured by Lion Specialty Chemicals, "EnergyCall L-30B".

[0073] <(C) component> • c-1: Polyethyleneimine (manufactured by BASF, trade name "Lupasol SK", modified branched polyethyleneimine, weight-average molecular weight = 2 million). • c-2: Polyethyleneimine (BASF, product name "Lupasol G100", branched-chain polyethyleneimine, weight-average molecular weight = 5000). • c-3: Polyethyleneimine (BASF, trade name "Lupasol FG", branched-chain polyethyleneimine, weight-average molecular weight = 800).

[0074] <(C') component> ·c'-1: Alkoxylated polyethyleneimine (alkoxylated PEI), an EO adduct of polyethyleneimine, manufactured by BASF, trade name "Sokalan HP20".

[0075] <(D) component> d-1: Monoethanolamine (manufactured by Nippon Shokubai, product name "Monoethanolamine"). d-2: Triethanolamine (manufactured by Sigma-Aldrich, trade name "Tryethanolamine"). d-3: 2-amino-hydroxymethyl-1,3-propanediol (AHPD) (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., trade name "2-amino-hydroxymethyl-1,3-propanediol").

[0076] <(E) component> e-1: Nonionic surfactant (XP-100): 2-Propylheptylalurethoxylate (alkyl group: branched chain with 10 carbon atoms, average number of repeating oxyethylene groups is 10 (BASF, LutensolXP-100)).

[0077] <(F) component> f-1: Sodium lactate, manufactured by Purelac Japan Co., Ltd., product name "Fermented Sodium Lactate 60% (S / HQ60)".

[0078] <Common ingredients> Each example of the liquid detergent composition contains the following common composition: • Paratoluenesulfonic acid...2% by mass. Citric acid: 0.26% by mass. Zinc oxide: 0.06% by mass. Sulfamic acid: 0.161% by mass. ·MIT (2-methyl-4-isothiazolin-3-one, manufactured by Rohm & Haas Japan Co., Ltd., product name "Neolon M-10") ···0.001 ppm by mass. ·Fragrance...0.3% by mass. • pH adjuster (sulfuric acid or sodium hydroxide aqueous solution) ... appropriate amount (the amount necessary to adjust the pH of the liquid detergent composition to 7). • Water (ion-exchanged water) ... Balance (the amount required to make the total mass of the liquid detergent composition 100% by mass).

[0079] (Evaluation method) <Feeling of stagnation> For each example, 4g of the liquid detergent composition and 16g of tap water were placed in a beaker and stirred for 30 seconds without creating foam to prepare a diluted solution. The diluted solution was immediately sampled after stirring, and its transmittance was measured at 660nm (the transmittance of ion-exchanged water was set to 100%). The measured transmittance was classified according to the evaluation criteria below. A lower transmittance indicates a greater amount of precipitate and a higher sense of retention. A value between "△" and "◎◎" indicates excellent retention.

[0080] ≪Evaluation Criteria≫ ◎◎: Transmittance less than 20%. ◎: Transmittance of 20% or more but less than 40%. ○: Transmittance of 40% or more but less than 60%. △: Transmittance of 60% or more but less than 95%. ×: Transmittance 95% or more.

[0081] <Yellowing prevention> Each example of the liquid detergent composition was placed in a colorless, transparent glass bottle and stored at 50°C for one week. The liquid color after storage was visually inspected and evaluated according to the evaluation criteria below. A rating of "△" to "◎◎" indicates excellent resistance to yellowing.

[0082] ≪Evaluation Criteria≫ ◎◎: No change compared to before storage. ◎: Slightly yellowed compared to before storage. ○: Slightly yellowed compared to before storage. △: Significantly yellowed compared to before storage. ×: It has yellowed significantly compared to before storage.

[0083] <Evaluation of cleaning power> 1.2g of beef tallow (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), colored to a concentration of 1% by mass of Sudan IV (manufactured by Kanto Chemical Co., Ltd.), was uniformly applied to the entire inside surface of a 10cm x 15cm x 5cm plastic container (product name "NeoKeeper," manufactured by Iwasaki Industries Co., Ltd.) to create a grime model. 38g of tap water and 2g of each example's liquid detergent composition were placed on an 11.5cm x 7.5cm x 3cm dishwashing sponge (product name "Scotch-Brite," manufactured by 3M Japan Limited), and rubbed 10 times by hand. After that, the bottom surface of the grime model was rubbed 10 times, the sides 10 times, and each of the four corners 5 times, and then the degree to which oil stains were removed from the inside of the container after rinsing with tap water was checked, and the cleaning power was evaluated according to the evaluation criteria below. A rating of "△" to "◎◎" indicates excellent cleaning power against oil stains.

[0084] ≪Evaluation Criteria≫ ◎◎: No visible traces of colored beef tallow were observed, and there was no greasy feeling due to residual beef tallow. ◎: No visible traces of colored beef tallow remain, but there is a slight greasiness due to residual beef tallow. ○: Visible residue of colored beef tallow is present, and there is a slight sliminess due to the remaining beef tallow. △: There is a considerable amount of colored beef tallow residue, and the meat is greasy due to the remaining beef tallow. ×: A large amount of colored beef tallow residue is visible.

[0085] <Dryness: Evaluation of the absence of dryness (feeling of dryness)> Hands were washed beforehand with liquid hand soap (product name "Kirei Kirei Medicated Liquid Hand Soap," manufactured by Lion Corporation) and thoroughly dried with a towel. 2g of each example liquid detergent composition was dropped onto a sponge (product name "Scotch-Brite®," manufactured by 3M Japan Limited) soaked in 38g of 25°C tap water, and the sponge was rubbed 10 times on a 21cm diameter ceramic plate to create lather. The lathered sponge was placed on the ceramic plate, and the hands were touched with the foam for 1 minute, ensuring that the foam evenly covered the palms and backs of the hands. Hands were rinsed with 25°C tap water for 10 seconds, thoroughly dried with a towel, and after 1 minute, the "lack of dryness" was evaluated based on the following evaluation criteria. A score of "○" to "◎◎" indicates excellent reduction of dryness.

[0086] (Evaluation Criteria) ◎◎: I don't feel any dryness in my hands at all. ◎: I hardly feel any dryness on my hands. ○: I don't feel much dryness in my hands. △: I feel a slight dryness in my hands. ×: I feel my hands are very dry.

[0087] (Examples 1-31, Comparative Examples 1-6) Liquid detergent compositions for each example at pH 7 were prepared by adding each component to water and mixing them according to the compositions shown in Tables 1-3. Note that the ingredient amounts in the table are calculated on a net basis. Also, a "-" in the ingredient amount in the table indicates that the ingredient is not included. For each example of liquid detergent, we evaluated its lingering sensation, yellowing inhibition, cleaning power, and dryness, and the results are shown in the table.

[0088] [Table 1]

[0089] [Table 2]

[0090] [Table 3]

[0091] As shown in Tables 1-3, Examples 1-31 had a lingering sensation of "△" to "◎◎", yellowing suppression of "△" to "◎◎", cleaning power of "△" to "◎◎", and dryness of "○" to "◎◎". Comparative Example 1, in which component (C') was used instead of component (C), and Comparative Example 5, which lacked component (C), both showed a "×" (indicating a feeling of lingering after use). Comparative Example 2, which contained 25% by mass of component (A), received a "×" rating for dryness. Comparative Example 3, which lacked component (A), received a "×" rating for both lingering sensation and cleaning power. Comparative Example 4, which lacked component (B), had a cleaning power of "×". Comparative Example 6, which lacked component (D), showed a "fail" in suppressing yellowing. From the results above, it was confirmed that applying the present invention results in excellent cleaning performance, suppression of discoloration, and a feeling of gentleness on the hands.

Claims

1. (A) Ingredients: Non-soap-based anionic surfactant, (B) Components: One or more surfactants selected from semipolar surfactants and amphoteric surfactants, (C) Components: Polyethyleneimine (excluding those containing oxyalkylene groups) and (D) Components: Alkanolamine and A liquid dishwashing detergent composition comprising, A liquid dishwashing detergent composition wherein the content of component (A) is 1 to 20% by mass relative to the total mass of the liquid dishwashing detergent composition.

2. The liquid dishwashing detergent composition according to claim 1, wherein the mass ratio of component (A) / component (B) is 0.1 to 10.

3. The liquid dishwashing detergent composition according to claim 1 or 2, wherein the mass ratio represented by component (A) / [component (B) + component (C)] is 0.1 to 9.

4. Furthermore, the liquid dishwashing detergent composition according to claim 1 or 2 further contains (E) component: nonionic surfactant.

5. Furthermore, the liquid dishwashing detergent composition according to claim 1 or 2 further contains (F) component: one or more selected from lactic acid and its salts.

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