Liquid detergent composition for textile products

Abstract

In a liquid detergent composition for textile products, the cleaning power against protein stains is enhanced, and the re-soiling prevention effect is also enhanced. [Solution] A liquid detergent composition for textile products containing (A) a nonionic surfactant and (B) at least one selected from polymethacrylic acid and its salts, wherein the content of (A) is 15% by mass or more of the total mass of the liquid detergent composition for textile products. Preferably, the composition further contains (C) at least one selected from at least one selected from alkoxylated polyalkyleneimines and alkoxylated polyalkyleneamines.

Description

[Technical Field]

[0001] This invention relates to a liquid detergent composition for textile products. [Background technology]

[0002] Liquid detergent compositions for textile products are required not only to remove dirt but also to prevent the removed dirt from reattaching to the garment (re-soiling prevention effect). This problem cannot be easily solved by using general liquid detergent compositions for textile products. For example, Patent Document 1 proposes a liquid detergent composition for textile products containing a surfactant, a carboxyl group-containing polymer of a specific molecular weight, and an aminocarboxylic acid or a salt thereof of a specific molecular weight in a specific mass ratio. According to the invention described in Patent Document 1, re-soiling is prevented. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-26786 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, protein stains are a well-known type of stain on textile products. Liquid detergent compositions for textile products are required to exhibit excellent cleaning power against protein stains.

[0005] Therefore, the present invention aims to provide a liquid detergent composition for textile products that enhances cleaning power against protein stains and has excellent re-soiling prevention effects. [Means for solving the problem]

[0006] The present invention has the following aspects. <1> A liquid detergent composition for textile products, comprising (A) component: a nonionic surfactant, and (B) component: at least one selected from polymethacrylic acid and its salts. A liquid detergent composition for textile products, wherein the content of component (A) is 15% by mass or more based on the total mass of the liquid detergent composition for textile products. <2> (C) Components: Further containing at least one selected from at least one selected from alkoxylated polyalkyleneimines and alkoxylated polyalkyleneamines, The content of component (C) is 2% by mass or more relative to the total mass of the liquid detergent composition for textile products. <1> A liquid detergent composition for textile products as described above. <3> The sum of component (B) and component (C) is 4% by mass or more of the total mass of the liquid detergent composition for textile products. <2> A liquid detergent composition for textile products as described above. <4> The mass ratio expressed as component (B) / component (C) is 1.0 or greater. <2> or <3> A liquid detergent composition for textile products as described above. <5> (D) Ingredients: Further contains a non-soap-based anionic surfactant, <1> ~ <4> A liquid detergent composition for textile products as described in any of the following. <6> The total amount of component (A) + component (D) is 25% by mass or more of the total mass of the liquid detergent composition for textile products. <5> A liquid detergent composition for textile products as described above. <7> The mass ratio expressed as component (A) / component (D) is 1 or greater. <5> or <6> A liquid detergent composition for textile products as described above. [Effects of the Invention]

[0007] The liquid detergent composition for textile products of the present invention enhances cleaning power against protein stains and has excellent re-soiling prevention effects. [Modes for carrying out the invention]

[0008] (Liquid detergent composition for textile products) The liquid detergent composition for textile products of the present invention (hereinafter sometimes simply referred to as "liquid detergent composition") contains the following components (A) to (B). In this specification, the numerical range represented by "~" means a numerical range with the numerical values before and after ~ as the lower limit value and the upper limit value.

[0009] <Component (A)> Component (A) is a nonionic surfactant. By containing component (A), the liquid detergent composition exhibits detergency against protein stains.

[0010] Examples of component (A) include polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, alkyl glycosides, etc. Among them, polyoxyalkylene alkyl ethers are preferred.

[0011] Polyoxyethylene alkyl ether is represented by the following formula (a1). R 1 -O-[(EO) s1 / (A 1 O) t1 -(EO) u1 -H ···(a1) In formula (a1), R 1 is a hydrocarbon group having 8 to 22 carbon atoms, EO is an oxyethylene group, s1 is a number from 3 to 25 indicating the average repeating number of EO, A 1 O represents at least one of PO (oxypropylene group) and BO (oxybutylene group), t1 is a number from 0 to 6 indicating the average repeating number of A 1 O, and u1 is a number from 0 to 20 representing the average repeating number of EO.

[0012] R 1 The hydrocarbon group of has 8 to 22 carbon atoms, preferably 10 to 22, more preferably 10 to 20, still more preferably 10 to 18, and particularly preferably 12 to 18. R 1 may be linear or branched. R 1This group may be a linear hydrocarbon group, or a group selected from a branched primary hydrocarbon group and a linear secondary hydrocarbon group. R 2 Preferably, the element is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and more preferably a hydrogen atom.

[0013] When u1 is 0, s1 is preferably 4 to 20, more preferably 5 to 16, and even more preferably 6 to 10. Also, t1 is preferably 0 to 4, more preferably 0 to 2, and even more preferably 0. If u1 is 1 or greater, s1 is preferably 4 to 16, more preferably 6 to 12, and even more preferably 8 to 10. t1 is preferably 1 to 4, more preferably 2 to 3. u1 is preferably 4 to 16, more preferably 6 to 12, and even more preferably 8 to 10. If t1 is 1 or greater, [(EO) s1 / ( A 1 O) t1 In this case, there are no particular limitations on the distribution (order of arrangement) of EO and PO, EO and BO, or EO, ​​PO and BO; they may be arranged in blocks or randomly. The average number of repeats can be measured by gas chromatography or other methods.

[0014] Examples of polyoxyethylene alkyl ethers include the following: (a1) Ingredients: Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 7) "AE(7EO)", which is a natural alcohol to which 7 moles of ethylene oxide have been added. (a2) Ingredients: Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 15) "AE(15EO)", which is a natural alcohol to which 15 moles of ethylene oxide have been added. (a3) Ingredients: Polyoxyethylene alkyl ether (EO5): Polyoxyethylene alkyl ether (5 moles of EO added), manufactured by Ecogreen, product name "Ecolat 24-5 / 85". (a4) Ingredients: Polyoxyethylene alkyl ether (EO9): Polyoxyethylene alkyl ether (9 moles of EO added), manufactured by Ecogreen, product name "Ecolat 24-9 / 85". (a5) Ingredients: Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 7), a secondary alcohol with 12-14 carbon atoms to which 7 moles of ethylene oxide have been added, manufactured by Nippon Shokubai Co., Ltd., product name "Softanol 70". (a6) Components: EO / PO nonionic, natural alcohol (mass ratio of C12 alcohol / C14 alcohol = 7 / 3) to which 8 moles of ethylene oxide, 2 moles of propylene oxide, and 8 moles of ethylene oxide are block-added in that order. (a7) Components: EO / PO nonionic, a PO-terminated compound obtained by adding 15 moles of ethylene oxide to 1 mole of primary alcohol (100% C14 alcohol), followed by the addition of 3 moles of propylene oxide. (a8) Ingredients: 2-Propylheptyl alcohol ethoxylate, trade name "Lutensol XP-100", manufactured by BASF.

[0015] Examples of fatty acid alkyl esters include the following: (a9) Components: Polyoxyethylene fatty acid methyl ester, "MEE", and coconut fatty acid methyl (a mixture of methyl laurate / methyl myristate in a mass ratio of 74 / 26) to which 15 moles of ethylene oxide are added using an alkoxylation catalyst.

[0016] The above-mentioned component (A) may be a single type or a combination of two or more types.

[0017] (A) The content of component (A) is preferably 15% by mass or more, more preferably 20% by mass or more, and even more preferably 25% by mass or more, based on the total mass of the liquid detergent composition. When the content of component (A) is above the lower limit of the above value, the cleaning power against protein stains can be further enhanced. (A) The upper limit of the content of component (A) is preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less, relative to the total mass of the liquid detergent composition. When the content of component (A) is below the above upper limit, the liquid stability can be improved. (A) The range of content of component can be appropriately combined from the lower and upper limits mentioned above.

[0018] <(B) component> Component (B) is at least one selected from polymethacrylic acid and its salts. By containing component (B), the liquid detergent composition has enhanced cleaning power and excellent re-soiling prevention effect.

[0019] Component (B) is a polymer having substantially only repeating units derived from methacrylic acid (a so-called polyacrylic acid homopolymer). "Substantially" means that it does not exclude polymers having other repeating units as long as they do not hinder the effects of the present invention.

[0020] The mass-average molecular weight of component (B) is preferably 550 or more and less than 75,000, more preferably 550 or more and less than 55,000, and even more preferably 1,000 or more and less than 35,000. The re-contamination prevention effect can be further enhanced if the mass-average molecular weight is within the above lower limit range.

[0021] (B) Examples of components include the product name "FLOSPERSE M 9500" (methacrylate homopolymer, mass average molecular weight 30,000, manufactured by SNF Corporation) and the product name "FLOSPERSE M 3000" (methacrylate homopolymer, mass average molecular weight 5,500). (B) Component may be a single type or a combination of two or more types.

[0022] The content of component (B) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, relative to the total mass of the liquid detergent composition. When the content of component (B) is above the lower limit, the cleaning power against protein stains is further enhanced and the re-soiling prevention effect is further enhanced. (B) The upper limit of the content of component (B) is preferably 7% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, relative to the total mass of the liquid detergent composition. When the content of component (B) is below the above upper limit, the liquid stability can be further improved. (B) The range of content of component can be appropriately combined from the lower and upper limits mentioned above.

[0023] <Optional ingredients> The liquid detergent composition may contain other components (optional components) besides components (A) and (B). Optional components include at least one selected from at least one of alkoxylated polyalkyleneimines and alkoxylated polyalkyleneamines (component (C)), a non-soap-based anionic surfactant (component (D)), water, surfactants other than components (A) and (D) (optional surfactants), chelating agents, enzymes, hydrotropes (e.g., aromatic sulfonic acid or its salts), water-miscible organic solvents (monohydric alcohols with 1 to 5 carbon atoms, polyhydric alcohols with 2 to 5 carbon atoms), cleaning builders, enzyme stabilizers, alkaline agents (e.g., alkanolamines such as diethanolamine and triethanolamine), metal ion scavengers, texture enhancers such as silicones, preservatives, fluorescent agents, color transfer inhibitors, pearlescent agents, antioxidants, antibacterial agents, general-purpose dyes or pigments as colorants, emulsifiers, fragrances, pH adjusters, soil-release polymers (SR agents), etc. Furthermore, the sum of component (A) and component (B) and any optional component shall not exceed 100% by mass.

[0024] ≪(C) Component≫ Component (C) is at least one selected from alkoxylated polyalkyleneimine (component (c1)) and alkoxylated polyalkyleneamine (component (c2)). The liquid detergent composition can be made to have a more enhanced re-soiling prevention effect by containing component (C).

[0025] Component (c1) is an alkylene oxide adduct of a polyalkylene imine. Component (c1) can be represented, for example, by the following formula (II).

[0026] NH 2 -R 21 -(NA-R 21 ) n -NH2···(II)

[0027] In formula (II), R 21 Each of these is an alkylene group having 2 to 6 carbon atoms, A represents a hydrogen atom or another branched polyamine chain, and n is a number greater than or equal to 1. However, A cannot consist entirely of hydrogen atoms. R 21 R is a linear alkylene group having 2 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms. 21 The alkylene group having 2 to 4 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred.

[0028] Polyalkyleneimines are obtained by polymerizing one or more alkyleneimines having 2 to 6 carbon atoms by conventional methods. Examples of alkyleneimines having 2 to 6 carbon atoms include ethyleneimine, propyleneimine, 1,2-butyleneimine, 2,3-butyleneimine, and 1,1-dimethylethyleneimine. As the polyalkylene imine, polyethyleneimine (PEI) and polypropyleneimine are preferred, with PEI being more preferred. PEI is obtained by polymerizing ethyleneimine and has a branched chain structure containing primary, secondary, and tertiary amine nitrogen atoms in its structure.

[0029] The weight-average molecular weight of the polyalkyleneimine is preferably 200 to 2,000, more preferably 300 to 1,500, even more preferably 400 to 1,000, and particularly preferably 500 to 800.

[0030] The weight-average molecular weight of component (C) was determined by gel permeation chromatography (GPC) using polyethylene glycol as the standard substance. The polyalkylene imine is preferably one that has 5 to 30 active hydrogen atoms per molecule, more preferably one that has 7 to 25, and even more preferably one that has 10 to 20.

[0031] Component (c1) is obtained by adding an alkylene oxide to a polyalkylene imine. Examples of this method include adding an alkylene oxide such as ethylene oxide to the starting material, a polyalkylene imine, at 100-180°C in the presence of a basic catalyst such as sodium hydroxide, potassium hydroxide, or sodium methylate. Examples of alkylene oxides include alkylene oxides having 2 to 4 carbon atoms. Examples of alkylene oxides include ethylene oxide, propylene oxide, and butylene oxide, with ethylene oxide and propylene oxide being preferred, and ethylene oxide being more preferred.

[0032] (c1) Examples of components include ethylene oxide adducts of polyalkyleneimines, propylene oxide adducts of polyalkyleneimines, and ethylene oxide-propylene oxide adducts of polyalkyleneimines. Note that ethylene oxide-propylene oxide adducts of polyalkyleneimines are obtained by adding ethylene oxide and propylene oxide to polyalkyleneimines, and the order of addition of ethylene oxide and propylene oxide to the polyalkyleneimine, as well as the form of addition (block-like, random), are arbitrary. (c1) The ethylene oxide adduct of polyalkyleneimine and the ethylene oxide-propylene oxide adduct of polyalkyleneimine are preferred, and the ethylene oxide adduct of polyalkyleneimine is more preferred. (c1) Component is preferably one in which an average of 5 to 40 alkylene oxides are added to one active hydrogen atom of the raw material polyalkyleneimine, and preferably one in which an average of 10 to 30 alkylene oxides are added. That is, it is preferably one in which an average of 5 to 40 moles of alkylene oxides are added to one mole of active hydrogen of the raw material polyalkyleneimine, and preferably one in which an average of 10 to 30 moles of alkylene oxides are added. The weight-average molecular weight of component (c1) is preferably 1,000 to 80,000, more preferably 2,000 to 50,000, even more preferably 5,000 to 30,000, and particularly preferably 10,000 to 20,000. (c1) Examples of components include the compound shown in formula (II-a).

[0033] [ka]

[0034] In formula (II-a), R 32 Each of these is an alkylene group having 2 to 6 carbon atoms, and each of these is a number of 1 or more. R 32 The alkylene group having 2 or 3 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred. m is (R 32 This is the average number of repetitions of O), and each is independently preferably 5 to 40, and more preferably 10 to 30.

[0035] (c1) The component may be a synthetic product or a commercially available product. Examples of commercially available products include the "Sokalan HP20" manufactured by BASF.

[0036] Component (c2) is an alkylene oxide adduct of a polyalkyleneamine. Polyalkyleneamines are represented by the following formula (III).

[0037] NH2(R 31 NH) l H ···(III)

[0038] In formula (III), R 31 is an alkylene group having 2 to 6 carbon atoms, and l is a number greater than or equal to 1.

[0039] R 31R is a linear alkylene group having 2 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms. 31 The alkylene group having 2 to 4 carbon atoms is preferred, and the alkylene group having 2 carbon atoms is more preferred.

[0040] Polyethyleneamines are preferred as polyalkyleneamines. Examples of polyethyleneamines include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine. These polyethyleneamines can be obtained by known production methods, for example, by reacting ammonia with ethylene dichloride.

[0041] The weight-average molecular weight of the polyalkyleneamine is preferably 60 to 1800, more preferably 60 to 1000, and even more preferably 60 to 800. The polyalkyleneamine is preferably one that has 6 to 30 active hydrogen atoms in one molecule, and more preferably one that has 7 to 20 active hydrogen atoms.

[0042] Component (c2) is obtained by adding an alkylene oxide to a polyalkyleneamine. This reaction can be carried out in the same manner as for component (c1). Examples of alkylene oxides include those having 2 to 4 carbon atoms. Examples of the alkylene oxides include ethylene oxide, propylene oxide, and butylene oxide, with ethylene oxide and propylene oxide being preferred, and ethylene oxide being more preferred.

[0043] (c2) Examples of component (c2) include ethylene oxide adducts of polyalkyleneamines, propylene oxide adducts of polyalkyleneamines, and ethylene oxide-propylene oxide adducts of polyalkyleneamines. (c2) The ethylene oxide adduct of polyalkyleneamine and the ethylene oxide-propylene oxide adduct of polyalkyleneamine are preferred, and the ethylene oxide adduct of polyalkyleneamine is more preferred. (c2) Component is preferably one in which an average of 5 to 40 alkylene oxides are added to one active hydrogen atom of the raw material polyalkyleneamine, and more preferably one in which an average of 10 to 30 alkylene oxides are added. That is, it is preferably one in which an average of 5 to 40 moles of alkylene oxides are added to one mole of active hydrogen of the raw material polyalkyleneamine, and more preferably one in which an average of 10 to 30 moles of alkylene oxides are added.

[0044] The weight-average molecular weight of component (c2) is preferably 1,000 to 80,000, more preferably 2,000 to 50,000, even more preferably 5,000 to 30,000, and particularly preferably 10,000 to 20,000.

[0045] (C) Component (c1) is preferred. Among the (c1) components, the ethylene oxide adduct of polyethyleneimine (ethoxylated polyethyleneimine) is preferred. (C) Component may be a single type or a combination of two or more types.

[0046] If the liquid detergent composition contains component (C), the content of component (C) is preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 1.5% by mass or more, based on the total mass of the liquid detergent composition. If the content of component (C) is above the lower limit mentioned above, the re-soiling prevention effect can be further enhanced. The upper limit of the content of component (C) is preferably 7% by mass or less, and more preferably 5% by mass or less. When the content of component (C) is below the above upper limit, the liquid stability can be further improved. The range of content for component (C) can be appropriately combined from the lower and upper limits mentioned above.

[0047] When the liquid detergent composition contains component (C), the total amount of component (B) and component (C) (BC amount) is preferably 4% by mass or more, more preferably 4.5% by mass or more, and even more preferably 5% by mass or more, based on the total mass of the liquid detergent composition. If the BC amount is above the lower limit of the above, the re-soiling prevention effect can be further enhanced. The upper limit of the BC content is preferably 9% by mass or less, more preferably 8% by mass or less, and even more preferably 7% by mass or less, relative to the total mass of the liquid detergent composition. When the BC content is below the above upper limit, the liquid stability can be further enhanced. The range of BC can be appropriately combined with the lower and upper limits mentioned above.

[0048] When a liquid detergent composition contains component (C), the mass ratio (B / C ratio), which is the ratio of the content of component (B) to the content of component (C), is preferably 1.0 or higher, more preferably 1.5 or higher, and even more preferably 2 or higher. When the B / C ratio is above the lower limit of the above, the cleaning power against protein stains can be further enhanced. The upper limit of the B / C ratio is preferably 5 or less, more preferably 4.5 or less, and even more preferably 4 or less. When the B / C ratio is below the above upper limit, the effect of preventing re-contamination can be further enhanced. The range of the B / C ratio can be appropriately combined using the lower and upper limits mentioned above.

[0049] ≪(D) ​​Component≫ Component (D) is a non-soap-based anionic surfactant. In other words, component (D) is an anionic surfactant excluding soap. (D) Examples of component include linear alkylbenzene sulfonic acid or its salts, α-olefin sulfonates, linear or branched alkyl sulfate ester salts, alkyl ether sulfate ester salts or alkenyl ether sulfate ester salts, alkyl group-containing alkane sulfonates, α-sulfo fatty acid ester salts, etc.

[0050] Linear alkylbenzene sulfonic acid or its salt is preferably one in which the linear alkyl group has 8 to 16 carbon atoms, and more preferably one in which the linear alkyl group has 10 to 14 carbon atoms. As for α-olefin sulfonates, those with 10 to 20 carbon atoms are preferred. Alkyl sulfate esters with 10 to 20 carbon atoms are preferred. Preferably, the alkyl ether sulfate or alkenyl ether sulfate has a linear or branched alkyl or alkenyl group having 10 to 20 carbon atoms, to which an average of 1 to 10 moles of ethylene oxide is added (i.e., polyoxyethylene alkyl ether sulfate or polyoxyethylene alkenyl ether sulfate). The alkanesulfonate has 10 to 20 carbon atoms, preferably 14 to 17, and secondary alkanesulfonates are particularly preferred. As the α-sulfo fatty acid ester salt, those with 10 to 20 carbon atoms are preferred.

[0051] Examples of salts of component (D) include alkali metal salts such as sodium salt and potassium salt, ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, 2-amino-2-methylpropanol salt, and alkanolamine salts such as 2-amino-2-methylpropanediol.

[0052] Among the components of (D), linear alkylbenzene sulfonic acid or its salts, alkane sulfonates, polyoxyethylene alkyl ether sulfates, and α-olefin sulfonates are preferred, and linear alkylbenzene sulfonic acid or its salts and polyoxyethylene alkyl ether sulfates are more preferred. (D) Component may be a single type or a combination of two or more types.

[0053] If the liquid detergent composition contains component (D), the content of component (D) is preferably 5% by mass or more, more preferably 7% by mass or more, and even more preferably 10% by mass or more, based on the total mass of the liquid detergent composition. When the content of component (D) is above the lower limit mentioned above, the cleaning power against protein stains can be further enhanced. The upper limit of the content of component (D) is preferably 22% by mass or less, more preferably 20% by mass or less, and even more preferably 18% by mass or less. When the content of component (D) is below the above upper limit, the liquid stability can be further improved. The range of content for component (D) can be determined by appropriately combining the lower and upper limits mentioned above.

[0054] When the liquid detergent composition contains component (D), the total amount of component (A) and component (D) (AD amount) is preferably 25% by mass or more, more preferably 30% by mass or more, and even more preferably 35% by mass or more, based on the total mass of the liquid detergent composition. When the AD amount is above the lower limit of the above value, the cleaning power against protein stains can be further enhanced. The upper limit of AD is preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less. When the amount of AD is below the above upper limit, the liquid stability can be further improved. The range of content for component (D) can be determined by appropriately combining the lower and upper limits mentioned above.

[0055] When a liquid detergent composition contains component (D), the mass ratio (A / D ratio), which is the ratio of the content of component (A) to the content of component (D), is preferably 1 to 5, more preferably 1.5 to 4.5, and even more preferably 2 to 4. When the A / D ratio is within the above range, the cleaning power against protein stains can be further enhanced.

[0056] ≪Water≫ Examples of water include tap water, well water, ion-exchanged water, purified water, distilled water, and pure water. The water content is preferably 5 to 80% by mass, more preferably 15 to 65% by mass, and even more preferably 25 to 50% by mass, relative to the total mass of the liquid detergent composition. If the water content is above the lower limit, the dispersibility in the washing water is improved. If the water content is below the upper limit, the amount of active ingredients can be increased, and the amount of liquid detergent composition used per wash can be reduced.

[0057] ≪Optional surfactants≫ Examples of optional surfactants include soap, cationic surfactants, semipolar surfactants, and amphoteric surfactants. Soap is a fatty acid with 8 to 22 carbon atoms or a salt thereof. Examples of salts that make up soap include alkali metal salts, alkaline earth metal salts, and alkanolamine salts. Examples of cationic surfactants include quaternary ammonium salts. Examples of semi-polar surfactants include alkylamine oxide type surfactants. Examples of amphoteric surfactants include betaine-type surfactants.

[0058] <Physical properties> The pH of the liquid detergent composition at 25°C is preferably 5 to 9, more preferably 6 to 8, and even more preferably 6.5 to 7.5. A pH above the lower limit enhances cleaning power. A pH below the upper limit makes handling easier. In this specification, the pH of the liquid detergent composition is the value measured using a pH meter (manufactured by Toa DKK Co., Ltd., product name "HM-30G") after adjusting the temperature of the sample to 25°C.

[0059] The viscosity of the liquid detergent composition is not particularly limited. It is preferable that the liquid detergent composition has fluidity such that the liquid surface slopes quickly when the container is tilted. The viscosity of the liquid detergent composition, expressed as viscosity measured by a B-type viscometer, is preferably 10 to 1000 mPa·s, and more preferably 10 to 500 mPa·s.

[0060] (Manufacturing method) Liquid detergent compositions can be manufactured according to conventionally known manufacturing methods. For example, a liquid detergent composition can be manufactured by dissolving component (A), component (B), and optionally any other component in a portion of water, adjusting the pH with a pH adjuster as needed, and then adding the remaining water.

[0061] (How to use) Methods of using the liquid detergent composition of the present invention include, for example, putting the liquid detergent composition into the dispenser of a washing machine and then starting the washing machine; putting the liquid detergent composition into the washing tub together with the textile products to be washed during washing; immersing the products to be washed in a cleaning solution prepared by dissolving the liquid detergent composition in water beforehand; and applying the liquid detergent composition directly to the products to be washed, leaving it for, for example, 3 minutes to 24 hours, and then performing a normal wash (application washing). Another method of using the liquid detergent composition of the present invention is to put the liquid detergent composition into the automatic dispensing tank of a washing machine equipped with an automatic detergent dispensing function.

[0062] Examples of textile products to be washed include clothing, fabrics, towels, handkerchiefs, sheets, curtains, and carpets.

[0063] As described above, the liquid detergent composition of the present invention contains components (A) and (B), thereby enhancing the cleaning power against protein stains and improving the effect of preventing re-soiling. [Examples]

[0064] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description.

[0065] (Raw materials used) <(A) Ingredient: Nonionic surfactant> · A-1: ​​Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 7) "AE(7EO)", a natural alcohol to which 7 moles of ethylene oxide have been added. A-2: Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 15) "AE(15EO)", which is a natural alcohol to which 15 moles of ethylene oxide have been added. A-3: Polyoxyethylene alkyl ether (EO5), polyoxyethylene alkyl ether (5 moles of EO added), manufactured by Ecogreen, product name "Ecolat 24-5 / 85". A-4: Polyoxyethylene alkyl ether (EO9), polyoxyethylene alkyl ether (9 moles of EO added), manufactured by Ecogreen, product name "Ecolat 24-9 / 85". A-5: Polyoxyethylene alkyl (12-14 carbon atoms) ether (average number of moles of ethylene oxide added: 7), a secondary alcohol with 12-14 carbon atoms to which 7 moles of ethylene oxide have been added, manufactured by Nippon Shokubai Co., Ltd., product name "Softanol 70". · A-6: EO / PO nonionic, a natural alcohol (mass ratio of C12 alcohol / C14 alcohol = 7 / 3) to which 8 moles of ethylene oxide, 2 moles of propylene oxide, and 8 moles of ethylene oxide are added in that order via block addition. A-7: EO / PO nonionic, a PO-terminated compound obtained by adding 15 moles of ethylene oxide to 1 mole of a primary alcohol (100% C14 alcohol), followed by the addition of 3 moles of propylene oxide. A-8: 2-Propylheptyl alcohol ethoxylate, trade name "Lutensol XP-100", manufactured by BASF. A-9: Polyoxyethylene fatty acid methyl ester, "MEE", and coconut fatty acid methyl (a mixture of methyl laurate / methyl myristate in a mass ratio of 74 / 26) to which 15 moles of ethylene oxide were added using an alkoxylation catalyst.

[0066] <(B) Ingredients: Polymethacrylic acid or its salt> • B-1: Methacrylic acid homopolymer, mass-average molecular weight 30,000, brand name "FLOSPERSE M 9500" manufactured by SNF. B-2: Methacrylic acid homopolymer, mass-average molecular weight 5500, brand name "FLOSPERSE M 3000" manufactured by SNF.

[0067] <(B') component: Comparison product of (B) component> B'-3: Acrylic acid homopolymer, mass-average molecular weight 5500, brand name "FLOSPERSE 3000A" manufactured by SNF.

[0068] <(C) Component: Alkoxylated polyalkyleneimine or alkoxylated polyalkyleneamine> • C-1: Ethylene oxide adduct of polyethyleneimine, trade name "Sokalan HP20", manufactured by BASF.

[0069] <(D) Ingredient: Non-soap-based anionic surfactant> • D-1: Linear alkylbenzene sulfonic acid, trade name "Lypon LH-200", manufactured by Lion Corporation. • D-2: Polyoxyethylene alkyl ether sulfate, with an average number of moles of ethylene oxide added of 1.0, manufactured by Lion Corporation.

[0070] <Other ingredients> • Coconut fatty acid: Fatty acid, product name "Coconut Fatty Acid", manufactured by NOF Corporation. • SR agent: Soil release polymer, product name "TexCare SRN-170C", manufactured by Clariant Japan, mass average molecular weight = 2000-3000, pH (5% by mass aqueous solution at 20°C) = 4, viscosity (20°C) = 300 mPa·s). TexCare SRN-170C is a 70% by mass aqueous solution of product name "TexCare SRN-100" (manufactured by Clariant Japan, mass average molecular weight: 2000-3000). • Dicrosan: 5-chloro-2-(4-chlorophenoxy)phenol (common name: dicrosan), antibacterial agent, trade name "Tinosan HP100", manufactured by BASF. • PEG1000: Polyethylene glycol, product name "PEG#1000-L60", manufactured by Lion Corporation. Solfit: 3-Methoxy-3-methylbutanol, trade name "Solfit", manufactured by Kuraray Co., Ltd. • Ethanol: Water-miscible organic solvent, product name "Specific Alcohol 95% Synthetic", manufactured by Nippon Alcohol Sales Co., Ltd. Sodium sulfite: Antioxidant, trade name "Sodium Sulfite", manufactured by Shinshu Chemical Co., Ltd. • Sodium lactate: Enzyme stabilizer, trade name "Sodium Lactate", manufactured by Kanto Chemical Co., Ltd. • PTS acid: Paratoluenesulfonic acid, hydrotrope, trade name "PTS acid", manufactured by Kyowa Hakko Kirin Co., Ltd. • pH adjuster: Monoethanolamine, product name "Monoethanolamine", manufactured by Nippon Shokubai Co., Ltd. • Citric acid: Product name "Anhydrous Citric Acid," manufactured by Fuso Chemical Industry Co., Ltd. • Enzyme: Product name "Medley Core 210L", manufactured by Novozymes Japan Co., Ltd. • Fragrance: Fragrance agent, fragrance composition A as described in Tables 11-18 of Japanese Patent Publication No. 2002-146399. • Pigment: Coloring agent, product name "Green No. 3", manufactured by Kiseki Kasei Co., Ltd. • Water: Product name "Distilled Water", manufactured by Kanto Chemical Co., Ltd.

[0071] (Evaluation method) <Cleaning power: Cleaning power against protein stains> For the soiled cloth, commercially available protein-stained cloth (Swissatest, product name "EMPA117") cut to 5cm x 5cm was used. A terg-O-tometer (UNITED STATES TESTING) was used as the washing test apparatus. The washing solution was prepared by adding a liquid detergent composition to 900mL of water (25℃, 5°DH) to a concentration of 333 vol. ppm and stirring for 30 seconds. 900mL of the washing solution, 10 soiled cloths, and a cleaned knit cloth were placed in the washing test apparatus, and washed at 120 rpm and 25℃ for 10 minutes at a bath ratio of 20. Afterwards, the cloths were transferred to a twin-tub washing machine (Mitsubishi Electric Corporation, product name "CW-C30A1-H1"), rinsed in 30L of water (25℃, 5°DH) for 3 minutes, spun dry for 1 minute, and then air-dried. The reflectance of unstained cloth and soiled cloth before and after washing was measured using a colorimeter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "SE7700"), and the washing rate (%) was calculated using the following formula (s1). "Unstained cloth" refers to white cloth (raw cloth) that has not been stained (protein stains).

[0072] Cleaning rate (%) = (K / S of soiled cloth before cleaning - K / S of soiled cloth after cleaning) / (K / S of soiled cloth before cleaning - K / S of unsoiled cloth) × 100 ... (s1) [In formula (s1), K / S=(1-R / 100) 2 (2R / 100). R is reflectance (%).

[0073] The cleaning rate (%) was calculated for 10 soiled cloths, and the average value was determined. Separately, soiled cloths were washed in the same manner using a standard liquid detergent composition (liquid detergent composition of Comparative Example 1), and the average cleaning rate was determined. The average cleaning rate of the liquid detergent composition of Comparative Example 1 was 50%. The cleaning power against protein stains was evaluated based on the following criteria.

[0074] ≪Evaluation Criteria≫ ◎: The average cleaning rate is significantly higher than in Comparative Example 1, with a difference of 5% or more. ○: The average cleaning rate is higher than in Comparative Example 1, with a difference of 3% to less than 5%. △: The average cleaning rate is slightly higher than in Comparative Example 1, with a difference of 1% to less than 3%. ×: The average cleaning rate is about the same as or lower than that of Comparative Example 1, and the difference is less than 1%.

[0075] <Evaluation of the effect of preventing re-contamination> Each example of the liquid detergent composition was used to perform a washing process under the following washing conditions (washing, rinsing, and drying processes repeated three times in this order). The items to be washed were the following cotton cloth, wet artificial soiled cloth, and undershirt.

[0076] ≪Things to be washed≫ • Cotton cloth: Five pieces of 5cm x 5cm cotton knit fabric (manufactured by Tanigashira Shoten) to be used as re-soiling test cloths. • Wet-process artificial soiled cloths: 20 soiled cloths manufactured by the Japan Laundry Science Association (cloths with soiled material composed of oleic acid 28.3%, triolein 15.6%, cholesterol oleate 12.2%, liquid paraffin 2.5%, squalene 2.5%, cholesterol 1.6%, gelatin 7.0%, mud 29.8%, and carbon black 0.5% (by mass)). • Undershirt: A BVD undershirt (size LL, manufactured by Fuji Spinning Holdings Co., Ltd.) cut into small pieces (approximately 3cm x 3cm).

[0077] <Cleaning conditions> (1) Washing process 900 mL of 3°DH hard water at 25°C was placed in a Terg-o-tometer (manufactured by UNITED STATES TESTING), and a liquid laundry detergent composition was added to it to a concentration of 400 ppm. Then, the garment to be washed was placed in the terg-o-tometer. Subsequently, 3°DH hard water was added to adjust the bath ratio to 30:10 or 10:1, and the machine was washed at 120 rpm at 25°C for 5 or 10 minutes. (2) Rinsing process After washing, the garments were spin-dried for 1 minute, then rinsed with 900 mL of 25°C 3°DH hard water at 120 rpm for 3 minutes. This process (spin-drying and rinsing) was repeated twice. For the second rinse, a predetermined amount of fabric softener was added to 900 mL of 25°C 3°DH hard water. Soflan Aroma Rich (manufactured by Lion Corporation) was used as the fabric softener. (3) Drying process After rinsing the garments and spinning them for 1 minute, only the re-soiling test cloth (cotton cloth) was removed, placed between filter paper, and dried with an iron. A reflectance meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name: "Spectroscopic Colorimeter SE2000") was used to measure the reflectance (Z value) of the re-soiling test fabric before and after washing, and ΔZ was calculated using the following formula (s2).

[0078] ΔZ = (Z value before washing) - (Z value after washing) ... (s2)

[0079] The ΔZ of five cotton fabric samples used for re-soiling testing was calculated, and the effectiveness of the liquid detergent composition in preventing re-soiling of cotton fabrics was evaluated based on the following criteria.

[0080] ≪Evaluation Criteria≫ ◎: ΔZ is less than 18.0. ○: ΔZ is 18.0 or greater and less than 18.5. △: ΔZ is between 18.5 and 19.0. ×: ΔZ is 19.0 or greater.

[0081] (Examples 1-35, Comparative Examples 1-3) Each component was added to water and mixed according to the compositions shown in Tables 1-6 to prepare the liquid detergent compositions for each example. Note that the amounts listed in the table are calculated on a pure content basis. Also, ingredients whose amounts are not listed in the table are not included. The "appropriate amount" for pH adjusters is the amount required to bring the liquid detergent composition to pH 7. The "balance" for water is the amount required to bring the total mass of the liquid detergent composition to 100% by mass. For each example of a liquid detergent composition, the cleaning power and anti-re-adhesion effect were evaluated, and the results are shown in the table.

[0082] [Table 1]

[0083] [Table 2]

[0084] [Table 3]

[0085] [Table 4]

[0086] [Table 5]

[0087] [Table 6]

[0088] As shown in Tables 1-6, the cleaning power and re-soiling prevention effect of Examples 1-35 were all evaluated as "△" to "◎". Comparative Example 1, which lacked component (B), and Comparative Example 3, which contained component (B') instead of component (B), both received a "×" rating for cleaning power and re-soiling prevention effect. Comparative Example 2, which contained 13% by mass of component (A), received a "×" rating for its cleaning power. From the above results, it was confirmed that applying the present invention provides excellent cleaning power and prevents re-soiling.

Claims

1. A liquid detergent composition for textile products, comprising (A) component: a nonionic surfactant, and (B) component: at least one selected from polymethacrylic acid and its salts. A liquid detergent composition for textile products, wherein the content of component (A) is 15% by mass or more based on the total mass of the liquid detergent composition for textile products.

2. (C) Component: Further contains at least one selected from at least one selected from alkoxylated polyalkyleneimines and alkoxylated polyalkyleneamines, The liquid detergent composition for textile products according to claim 1, wherein the content of component (C) is 2% by mass or more relative to the total mass of the liquid detergent composition for textile products.

3. The liquid detergent composition for textile products according to claim 2, wherein the sum of component (B) and component (C) is 4% by mass or more of the total mass of the liquid detergent composition for textile products.

4. The liquid detergent composition for textile products according to claim 2 or 3, wherein the mass ratio represented by component (B) / component (C) is 1.0 or more.

5. (D) Component: A liquid detergent composition for textile products according to claim 1 or 2, further comprising a non-soap-based anionic surfactant.

6. The liquid detergent composition for textile products according to claim 5, wherein the sum of component (A) and component (D) is 25% by mass or more of the total mass of the liquid detergent composition for textile products.

7. The liquid detergent composition for textile products according to claim 5, wherein the mass ratio represented by component (A) / component (D) is 1 or more.

Images