JP7304208B2 - liquid detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquid detergent composition, for example, a liquid detergent composition suitable for washing tableware, hard articles around the kitchen, and the like.

For cleaning tableware and cooking utensils, high detergency and detergency that can easily remove stains such as liquid oil and solid oil that have a large cleaning load by rubbing them with a flexible object such as a sponge. Abundant foaming and foam persistence, which is a measure of , are required. From this point of view, anionic surfactants and amphoteric surfactants are sometimes used together in detergents used in kitchens and kitchens.

Patent Document 1 discloses a liquid detergent containing an amine oxide, a prescribed anionic surfactant, oxycarboxylic acid, and water under prescribed conditions. Patent Document 2 discloses that a solvent selected from the group consisting of predetermined low-molecular-weight organic diamines, anionic surfactants, amphoteric surfactants, and predetermined diols, predetermined polymerized glycols, and mixtures thereof, is added under predetermined conditions. Disclosed is a liquid dishwashing detergent composition comprising: Patent Document 3 discloses a liquid detergent composition containing a surfactant, an opacifying agent, and a polyalkylene oxide of a polyhydric alcohol having an average molecular weight of 300 to 4000 in amounts within predetermined ranges.

JP-A-9-78091 Japanese Patent Publication No. 2002-536497 JP-A-6-17095

Detergents used for washing dishes and the like are required to have detergency against oil stains, and for this reason, it is conceivable to use a combination of a plurality of surfactants. The present inventors have found that, for example, when an anionic surfactant and an amphoteric surfactant are used in combination, good detergency against oil stains can be obtained by using both in approximately the same amount. Heading. However, when a water-based detergent is prepared based on this knowledge, it has been found that storage stability and foamability are lowered. Although the reason for this is not necessarily clear, in water, an anionic surfactant and an amphoteric surfactant form an association such as a complex or mixed micelle, and in this association, the ionicity of each surfactant is different. This is thought to be due to the fact that the lipophilicity is offset and the detergency against oil stains is improved, while the foamability is reduced, making it easier to precipitate in water.

The present invention provides a liquid detergent composition which is excellent in detergency against oil stains, storage stability, and foamability during washing.

The present inventors have found that a composition using a combination of an anionic surfactant and an amphoteric surfactant, with the mass ratio of both in a predetermined range, and a nonionic surfactant, a polyalkylene oxide containing propylene oxide units, and The present inventors have found that by blending a hydrotrope agent under predetermined conditions, good detergency against oil stains and both storage stability and favorable foamability during washing can be achieved, leading to the completion of the present invention.

The present invention comprises (a) an anionic surfactant [hereinafter referred to as component (a)] of 5% by mass or more and 20% by mass or less, and (b) an amphoteric surfactant [hereinafter referred to as component (b)] of 5% by mass or more. 20% by mass or less, (c) a nonionic surfactant other than (d) [hereinafter referred to as component (c)], (d) a polyalkylene having a molecular weight of 500 or more and 1500 or less containing 80 mol% or more of propylene oxide units in the molecule 0.1% by mass or more and 5% by mass or less of an oxide [hereinafter referred to as component (d)], (e) a hydrotrope agent [hereinafter referred to as component (e)], and water, and the content of component (a) and (a) / (b), which is the mass ratio to the content of component (b), is 1.0 or more and 1.3 or less, and the content of component (a) and the content of component (c) It is related with the liquid detergent composition whose mass ratio (a)/(c) is 1.1-3.5.

ADVANTAGE OF THE INVENTION According to this invention, the liquid detergent composition which has the favorable detergency with respect to an oil stain, and was excellent in the storage stability and the foaming property at the time of washing is provided.

<Liquid detergent composition>
(a) Component anionic surfactants include alkylarylsulfonic acid-type surfactants, sulfate ester-type surfactants, alkanesulfonic acid-type surfactants, olefinsulfonic acid-type surfactants, and sulfosuccinic acid alkyl ester-type surfactants. One or more anionic surfactants selected from surfactants and sulfo fatty acid ester surfactants are preferred.

Alkyl benzene sulfonate is mentioned as an alkyl aryl sulfonic-acid-type surfactant. Specific examples include alkylbenzenesulfonates having an alkyl group having 6 or more carbon atoms, preferably 8 or more carbon atoms, and 18 or less, preferably 15 or less carbon atoms.

Examples of sulfate ester surfactants include anionic surfactants having a hydrocarbon group having 8 to 20 carbon atoms and a sulfate ester group. From the viewpoint of detergency, the hydrocarbon group has 8 or more carbon atoms, preferably 10 or more, more preferably 12 or more, and 20 or less, preferably 18 or less, more preferably 14 or less, and still more preferably 12 or less. be. The hydrocarbon group is preferably an alkyl group.
Examples of sulfate type surfactants include alkyl sulfates and polyoxyalkylene alkyl ether sulfates.
The alkyl sulfate ester salt includes an alkyl group having 8 or more carbon atoms, preferably 10 or more carbon atoms, and 20 or less, preferably 18 or less, more preferably 14 or less, and still more preferably 12 or less carbon atoms. Alkyl sulfate salts with alkyl groups are preferred.

The polyoxyalkylene alkyl ether sulfate salt includes an alkyl group having 8 or more carbon atoms, preferably 10 or more carbon atoms, and 20 or less, preferably 18 or less, more preferably 14 or less, and still more preferably 12 or less, and further linear or The average number of added moles of oxyalkylene groups having a branched alkyl group and having 2 to 3 carbon atoms is preferably 0.1 or more, more preferably 0.3 or more, still more preferably 0.4 or more, and , preferably 6 or less, more preferably 3 or less, and still more preferably 1.5 or less, are suitable polyoxyalkylene alkyl ether sulfate ester salts. The oxyalkylene group preferably has 2 carbon atoms.

Examples of alkanesulfonic acid-type surfactants include alkanesulfonates in which the number of carbon atoms in the alkane moiety is 8 or more, preferably 10 or more, more preferably 14 or more, and 20 or less, preferably 18 or less.

Olefinsulfonic acid type surfactants include α-olefinsulfonates and internal olefinsulfonates. The α-olefin sulfonate has 8 or more, preferably 10 or more, more preferably 14 or more carbon atoms in the olefin moiety and 22 or less, preferably 20 or less, more preferably 18 or less carbon atoms. In the internal olefin sulfonate, the number of carbon atoms in the olefin portion is 8 or more, preferably 12 or more, more preferably 16 or more, and 24 or less, preferably 20 or less, more preferably 18 or less.

As the sulfosuccinic acid alkyl ester surfactant, a fatty alcohol having 5 or more carbon atoms, preferably 6 or more carbon atoms, more preferably 7 or more carbon atoms, and 18 or less, preferably 14 or less, more preferably 10 or less carbon atoms and sulfosuccinic acid. Esters and/or diesters, preferably diesters, are preferred. Moreover, branched alcohols are suitable for fatty alcohols from the point of detergency.

The sulfo-fatty acid ester-type surfactant includes an α-sulfo fatty acid salt having a fatty acid moiety with 10 to 18 carbon atoms, a fatty acid moiety having 10 to 18 carbon atoms, and an ester moiety having 1 to 5 carbon atoms. and α-sulfo fatty acid lower alkyl ester salt.

Component (a) includes a polyoxyalkylene alkyl ether sulfate salt having an alkyl group having 8 to 18 carbon atoms, an alkyl sulfate ester salt having an alkyl group having 8 to 18 carbon atoms, and 5 to 18 carbon atoms. is preferably one or more anionic surfactants selected from salts of mono- or diesters of fatty alcohols and sulfosuccinic acid.

The liquid detergent composition of the present invention contains component (a) in an amount of 5% by mass or more, preferably 7% by mass or more, more preferably 9% by mass, from the viewpoints of detergency and foamability and foam retention during cleaning. and 20% by mass or less, preferably 18% by mass or less, more preferably 15% by mass or less.

(b) Component amphoteric surfactants include one or more amphoteric surfactants selected from amine oxide surfactants and betaine surfactants. Furthermore, at least one selected from an amine oxide surfactant having one hydrocarbon group having 8 to 18 carbon atoms and a betaine amphoteric surfactant having one hydrocarbon group having 8 to 18 carbon atoms. amphoteric surfactants. More specifically, the component (b) includes a tertiary amine oxide surfactant having one hydrocarbon group of 8 to 18 carbon atoms, a sulfo surfactant having one hydrocarbon group of 8 to 18 carbon atoms, One or more surfactants selected from betaine-type surfactants and carbobetaine-type surfactants having one hydrocarbon group having 8 to 18 carbon atoms may be mentioned.

As the tertiary amine oxide surfactant, one of the groups bonded to the nitrogen atom may be an alkyl group having 8 or more and 18 or less carbon atoms which may be divided by an amide group or an ester group, preferably 8 or more and 16 carbon atoms. Examples include the following alkyl groups, more preferably alkyl groups having 8 to 14 carbon atoms, the remainder being alkyl groups having 1 to 3 carbon atoms, preferably methyl groups, tertiary amine oxide surfactants.

As the sulfobetaine surfactant, one alkyl group having 10 or more carbon atoms and 18 or less, preferably 16 or less, more preferably 14 or less carbon atoms and an alkyl group having 1 or more and 3 or less carbon atoms, preferably a methyl group and a 3-sulfopropyl group or a 2-hydroxy-3-sulfopropyl group are preferred.

Further, the carbobetaine-type surfactant includes one alkyl group having 10 or more carbon atoms and 18 or less, preferably 16 or less, more preferably 14 or less carbon atoms which may be divided by an amide group or an ester group, and Carbobetaine-type surfactants having two alkyl groups, preferably methyl groups, and one carboxyalkyl group, preferably carboxymethyl group, having 1 to 3 carbon atoms are preferred.

Component (b) is preferably a betaine-type surfactant, selected from sulfobetaine-type surfactants and carbobetaine-type surfactants, from the viewpoints of enhancing detergency and foamability and foam retention during washing. Surfactants of at least one species are more preferred, and sulfobetaine-type amphoteric surfactants are even more preferred.

The liquid detergent composition of the present invention contains component (b) in an amount of 5% by mass or more, preferably 7% by mass or more, more preferably 9% by mass, from the viewpoints of enhancing detergency and foamability and foam retention during washing. % by mass or more and 20% by mass or less, preferably 18% by mass or less, more preferably 15% by mass or less.

In the liquid detergent composition of the present invention, from the viewpoint of detergency and storage stability, the mass ratio (a)/(b) of the content of component (a) to the content of component (b) is 1. .0 or more and 1.3 or less.

Component (c) is a nonionic surfactant other than component (d). Examples of nonionic surfactants as component (c) include (c1) alkyl glycoside type nonionic surfactants [hereinafter referred to as component (c1)], and (c2) alkyl glyceryl ether type surfactants [hereinafter referred to as component (c2). ] and (c3) alkyl ether type nonionic surfactants [hereinafter referred to as component (c3)]. (c) Component may be one or two or more.

Component (c1) includes (c1-1) an alkyl glycoside type nonionic surfactant having an alkyl group with 8 or more and 18 or less carbon atoms [hereinafter referred to as component (c1-1)]. The alkyl group of component (c1-1) preferably has 8 or more carbon atoms, more preferably 10 or more carbon atoms, and preferably 16 or less, more preferably 14 or less carbon atoms, and the average degree of condensation of sugars such as glucose is 1 or more. It is 3 or less, preferably 1 or more and 2 or less, more preferably 1 or more and 1.5 or less.

Component (c2) includes (c2-1) an alkyl glyceryl ether type surfactant having one alkyl group having 8 to 18 carbon atoms, preferably 8 to 14 carbon atoms, more preferably 8 to 12 carbon atoms. agent [hereinafter referred to as component (c2-1)]. The alkyl group of component (c2-1) is preferably a branched chain alkyl group having 8 or more and 12 or less carbon atoms.

Component (c3) includes (c3-1) polyoxyethylene alkyl ether [hereinafter referred to as component (c3-1)]. Component (c3-1) includes a branched fatty alcohol or secondary fatty alcohol having an alkyl group having 9 to 18 carbon atoms, preferably 9 to 15 carbon atoms, and an alkylene oxide having 2 or 3 carbon atoms, preferably ethylene. Nonionic surfactants to which an oxide is added in an average of 3 to 30 mol, preferably 3 to 20 mol, more preferably 3 to 15 mol, can be mentioned.

The liquid detergent composition of the present invention preferably contains component (c1) as component (c).

From the viewpoint of storage stability, the proportion of component (c1) in component (c) is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, and even more preferably 60% by mass. % or more.

The liquid detergent composition of the present invention contains, as the component (c), the component (c1) and one or more nonionic surfactants selected from the components (c2) and (c3). preferably.
The liquid detergent composition of the present invention more preferably contains (c1) component and (c2) component as (c) component.
When the liquid detergent composition of the present invention contains components (c1) and (c2) as components (c), the mass ratio between the content of component (c1) and the content of component (c2) (c2)/(c1) is preferably 0.3 or more, more preferably 0.6 or more, and preferably 2 or less, more preferably 1.6 or less.

From the viewpoint of storage stability, the liquid detergent composition of the present invention contains component (c) in an amount of preferably 2% by mass or more, more preferably 3% by mass or more, and preferably 8% by mass or less, more preferably 6% by mass. % by mass or less.

From the viewpoint of storage stability, the liquid detergent composition of the present invention has a mass ratio (a)/(c) of the content of component (a) to the content of component (c) of 1.1. above, preferably 1.5 or more and 3.5 or less, preferably 3.0 or less.

When the liquid detergent composition of the present invention contains component (c1), from the viewpoint of storage stability, the sum of the content of component (a) and the content of component (b) and the content of component (c1) The mass ratio [(a) + (b)] / (c1) is preferably 3.0 or more, more preferably 4.0 or more, still more preferably 5.0 or more, and preferably 10 or less , more preferably 9.5 or less, still more preferably 9.0 or less.

Component (d) is a polyalkylene oxide having a molecular weight of 500 to 1500 and containing 80 mol % or more of propylene oxide units in the molecule.

Component (d) preferably contains 85 mol % or more, more preferably 90 mol % or more, still more preferably 95 mol % or more of propylene oxide units in the molecule.

The molecular weight of component (d) is preferably 700 or more, preferably 1200 or less, more preferably 1000 or less. The molecular weight of component (d) is the weight average molecular weight determined by gel permeation chromatography using polyethylene glycol as a standard. Also, the content of propylene oxide units in the polyalkylene oxide can be determined by NMR (nuclear magnetic resonance spectrum).

Component (d) is preferably polypropylene oxide having a molecular weight of 500 or more and 1500 or less.

The liquid detergent composition of the present invention contains component (d) in an amount of 0.1% by mass or more, preferably 0.3% by mass or more, more preferably 0.5% by mass, from the viewpoint of foamability and viscosity during cleaning. % or more and 5 mass % or less, preferably 4 mass % or less, more preferably 3 mass % or less.

The liquid detergent composition of the present invention is a composition containing a surfactant, and from the viewpoint of foamability and viscosity during washing, the weight of the content of component (d) and the content of all surfactants is The ratio, (d)/total surfactant, is preferably 0.001 or greater, more preferably 0.005 or greater, even more preferably 0.01 or greater, and preferably 0.15 or less, more preferably 0 0.1 or less, more preferably 0.08 or less.

(e) Component is a hydrotrope agent. Component (e) is a glycol ether obtained by adding 1 to 3 moles of oxyethylene and/or oxypropylene to a compound selected from monohydric alcohols and phenols having 1 to 6 carbon atoms [hereinafter referred to as component (e1). ], and benzenesulfonates optionally substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms [hereinafter referred to as component (e2)].
Component (e1) is preferably a hydro-roping agent selected from butoxyethanol, butyldiglycol, butyltriglycol, phenoxyethanol, phenoxydiglycol, and phenoxytriglycol. Component (e2) preferably includes p-toluenesulfonic acid, m-xylenesulfonic acid, cumenesulfonic acid, and salts thereof.
In the present invention, the combined use of the (e1) component and the (e2) component, that is, the inclusion of the (e1) component and the (e2) component as the (e) component is preferable from the viewpoint of storage stability. In (e1)/(e2), which is the mass ratio of the content of component (e1) to the content of component (e2), is preferably 0.1 or more, more preferably 0.2 or more, And it is preferably 10 or less, more preferably 5 or less.

From the viewpoint of storage stability, the liquid detergent composition of the present invention preferably contains component (e) in an amount of 0.01% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1.0% by mass. above, and preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less.

In the present invention, by bringing the ratio of components (a) and (b) close to 1, mixed micelles are formed and hydrophobized, thereby imparting high detergency to oil stains. However, on the other hand, since the ionicity is canceled by forming mixed micelles, crystallization tends to occur at low temperatures and storage stability tends to decrease. In addition, although the surfactant is arranged in the foam film to stabilize the foam, the ionicity of the components (a) and (b) is offset, and the stability of the foam film is impaired. In the present invention, in response to this situation, the foamability and stability, which are the problems of mixed micelles that exhibit high detergency by suppressing crystallization by the component (c) and stabilizing the foam film by the component (d), are solved. It is thought that it can be improved. The component (e) imparts even better storage stability to the composition without impairing these effects.

The liquid detergent composition of the present invention contains, in addition to components (a), (b), (c), (d) and (e), an anti-gelling agent and a thickening agent such as polyacrylic acid. , fragrances, dyes, pigments, bactericides, preservatives, pH adjusters, etc., can be contained within a range that does not impair the effects of the present invention.

The liquid detergent composition of the present invention contains water. That is, water is the balance other than the components (a) to (e) and optional components. The liquid detergent composition of the present invention preferably contains water in an amount of 30% by mass or more, more preferably 50% by mass or more, and preferably 50% by mass or more. contains 85% by mass or less, more preferably 80% by mass or less, and still more preferably 75% by mass or less. As water, ion-exchanged water, sterilized ion-exchanged water, distilled water, hypochlorous acid sterilized water in which about 0.5 to 10 ppm of hypochlorous acid is dissolved, or the like can be used. The liquid detergent composition of the present invention may be in the form of a liquid composition in which the above components are dissolved and/or dispersed and/or emulsified in water. For example, the liquid detergent composition of the present invention may be in the form of an aqueous solution.

The pH at 25°C of the liquid detergent composition of the present invention is preferably 4 or higher, more preferably 5 or higher, and preferably 9 or lower, more preferably 8 or lower. Such pH adjustment can be performed by using an inorganic acid selected from sulfuric acid, hydrochloric acid, and phosphoric acid, an organic acid selected from citric acid, malic acid, maleic acid, fumaric acid, and succinic acid, sodium hydroxide, potassium hydroxide, and water. It is carried out using inorganic alkaline agents such as magnesium oxide, sodium carbonate, and potassium carbonate. In the present invention, it is preferable to impart a buffering capacity to the composition from the viewpoint of foamability/foam persistence, and it is preferable to use the above organic acid, preferably citric acid, together with an inorganic alkaline agent. The organic acid may be incorporated into the composition in the form of sodium salt or potassium salt.

The viscosity at 20° C. of the liquid detergent composition of the present invention, furthermore, the dishwashing liquid detergent composition is preferably 5 mPa·s or more, more preferably 10 mPa·s or more, and preferably 500 mPa·s or less, and more preferably 500 mPa·s or less. is 300 mPa·s or less. Viscosity can be adjusted by, for example, component (e).

The liquid detergent composition of the present invention is preferably for hard articles, more preferably for tableware and/or hard articles around the kitchen. More preferably, it is for tableware.

Hard articles around the kitchen are articles used around the kitchen, specifically:
(1) refrigerators, cupboards, and other places where food, tableware, and cooking utensils are stored;
(2) Food preparation areas such as drains, kitchen counters, range hoods, sinks, gas ranges, and microwave ovens; In the present invention, these are referred to as "hard articles around the kitchen" for convenience.
In addition, as tableware, specifically,
(i) So-called tableware such as plates and bowls,
(ii) storage containers such as Tupperware, bottles, etc.;
(iii) Kitchen utensils such as knives, cutting boards, pots, frying pans, fish grills, etc.
(iv) Components and equipment that come into contact with foodstuffs, such as cooking appliances such as food processors and mixers. In the present invention, these are referred to as "tableware" for convenience.
In addition, the present invention preferably targets items selected from tableware, storage containers, cooking utensils, and cooking appliances. More preferably, it is directed to articles selected from food processors and mixers.

The material of the hard article targeted by the present invention includes plastic (including silicone resin, etc.), metal, pottery, wood, and combinations thereof. And, the liquid detergent composition of the present invention can effectively clean the dirt containing the liquid oil adhering to these hard articles.

As described above, liquid oil adhering to a hydrophobic material such as plastic is a stain that is difficult to remove, but the present invention exhibits an excellent cleaning effect even for liquid oil adhering to a hard article made of plastic. The present invention is also suitable for cleaning hard articles made of plastic. Examples of plastics include polyolefins such as polypropylene and polyethylene, polymethacrylate, polycarbonate, ABS resin, and polyethylene terephthalate.

As described above, the liquid detergent composition of the present invention is suitably used for washing dishes and further washing dishes by hand. The cleaning liquid used for hand-washing is obtained using the liquid cleaning composition of the present invention, and the undiluted solution of the composition or the diluted solution containing water is used. As a specific hand washing method, for example, the composition of the present invention is attached to a flexible material such as a sponge containing water to hold the washing liquid, and the washing liquid is lathered while rubbing it several times with hands to scrub the dishes. do. The total concentration of the components (a), (b), (c) and (d) in the cleaning liquid retained by the flexible material is, for example, 1, 1, 1, 2 from the standpoint of high foamability and foam sustainability. It may be 000 ppm or more, even 2,000 ppm or more, and 30,000 ppm or less, further 20,000 ppm or less, even 10,000 ppm or less. Usually, water is added to rinse after washing. For example, in the present invention, 3.3 to 133 parts by mass of rinsing water per 1 part by mass of the composition used is enough to eliminate foam and quickly rinse. can be completed. The amount of this rinsing water is about 2/3 to 1/10 of that in the case of using a conventional detergent composition for hand washing.

Liquid detergent compositions shown in Table 1 were prepared using the following ingredients, and their detergency, foaming power and storage stability were evaluated by the following methods. Table 1 shows the results. In addition, in Table 1, the mass ratio of (d)/total surfactant is shown considering the (d') component as the (d) component.
Further, liquid detergent compositions of formulation examples shown in Table 2 were prepared using the following ingredients.
The ingredients in the table are as follows.

<Ingredients>
[(a) component]
・a-1: Di-2-ethylhexyl sodium sulfosuccinate, product name “Airol CT-1L”, manufactured by Toho Chemical Industry Co., Ltd. ・a-2: 1 mol of natural alcohol having an alkyl chain of 12 carbon atoms, propylene oxide 0.6 mol of is added, then sulfated with sulfur trioxide and neutralized with sodium hydroxide (diluted 10% with water and neutralized to pH 11).

[(b) component]
・ b-1: Lauryl dimethyl hydroxysulfobetaine, product name “Amphitol 20HD”, manufactured by Kao Corporation ・ b-2: Lauryl dimethylamine oxide, product name “Amphitol 20N”, manufactured by Kao Corporation

[Component (c)]
・c-1: Alkyl polyglucoside, product name “Plantacare 2000UP”, manufactured by BASF SE, alkyl group with 8 to 16 carbon atoms, degree of condensation of glucose 1 to 2
・ c-2: 2-ethylhexyl monoglyceryl ether, manufactured by Kao Corporation

[(d) component]
・PPG1000: Polypropylene oxide with a weight average molecular weight of 1000

[(d') component (comparative component of (d) component)]
PPG2000: Polypropylene oxide with a weight average molecular weight of 2000 PEG1000: Polyethylene oxide with a weight average molecular weight of 1000 PEG2000: Polyethylene oxide with a weight average molecular weight of 2000

[(e) component]
・ e-1: Diethylene glycol monobutyl ether, manufactured by Nippon Nyukazai Co., Ltd. ・ e-2: Paratoluenesulfonic acid, manufactured by Meiyu Sangyo Co., Ltd.

<Evaluation method>
(1) Evaluation of detergency The mass of a polypropylene test piece of 30 mm (width) x 80 mm (length) x 1 mm (thickness) was measured with a 4-digit balance (x). On both sides of the polypropylene test piece, a mixture of beef tallow (Sigma-Aldrich Japan Co., Ltd.) and rapeseed oil (Kishida Chemical Co., Ltd.) at a mass ratio of 9: 1 was applied to a height of 50 mm from the bottom end to a total of 0.02 on both sides. A soiled piece was prepared by uniformly applying ∼0.04 g. The mass of the same soiled piece was measured with a 4-digit balance (y). 50 g of a 30-fold dilution of each cleaning composition with water was placed in a 50 mL container (cylindrical with an inner diameter of 35 mm and a height of 68 mm). was brought into contact with At this time, the part of the soiled piece to which the soiling had adhered was completely immersed in the diluent in the container. After the soiled piece was immersed in the diluent in the container for 1 minute, the soiled piece was taken out and rinsed with running tap water for 1 minute. At this time, the conditions for running water rinsing were that the temperature of the tap water was 25° C., the flow rate was about 4 L/min, and the diameter of the faucet opening was about 15 mm. Hold the dirt piece at a 45° angle to the tap water falling on the dirt piece located 5 cm vertically below the opening, and hold the angle fixed at the top edge of the dirt piece where dirt is not attached. The washed portion was rinsed over one side with tap water running over the soiled piece under running water. At this time, the front and back were alternately rinsed every 10 seconds.
After rinsing, the soiled piece was dried and weighed (z) on a 4-digit balance. The cleaning rate was obtained by the following formula. A larger numerical value of the cleaning rate is preferable.
Cleaning rate (%) = {(y) - (z)}/{(y) - (x)} x 100

(2) Evaluation of foaming power 10 g of an aqueous solution obtained by diluting the above composition 30 times in a colorimetric tube (cylindrical shape with an inner diameter of 25 mm and a height of 250 mm), beef tallow (Sigma-Aldrich Japan Co., Ltd.) and rapeseed oil (Kishida Chemical Co., Ltd.) were mixed at a mass ratio of 1:1, and 0.5 g was added and the lid was closed. Shake up and down 20 times so that the contents hit the top and bottom inside the colorimetric tube in order to mix the aqueous solution and the fat mixture inside the colorimetric tube and make bubbles, and read the height of the foam after shaking. , the foaming power was determined.

(3) Evaluation of Storage Stability All of the liquid detergent compositions in the table exhibited a uniform and transparent appearance at room temperature. 30 g of each liquid detergent composition was placed in a glass wide-mouth standard bottle No. 1 manufactured by Ishida Yoki Co., Ltd. 6, sealed, and allowed to stand in an environment of -5°C. The appearance of the composition was observed, and the number of days showing uniform and transparent appearance was rated as ◯ for 10 days or more, and the case of less than 10 days as x.

Claims (7)

(a) 5% by mass or more and 20% by mass or less of an anionic surfactant [hereinafter referred to as component (a)];
(b) an amphoteric surfactant [hereinafter referred to as component (b)] of 5% by mass or more and 20% by mass or less;
(c) Nonionic surfactants other than (d) [hereinafter referred to as component (c)],
(d) 0.1% by mass or more and 5% by mass or less of a polyalkylene oxide having a molecular weight of 500 or more and 1500 or less containing 80 mol% or more of propylene oxide units in the molecule [hereinafter referred to as component (d)];
(e) a hydrotrope agent [hereinafter referred to as component (e)] and water,
(a) / (b), which is the mass ratio between the content of component (a) and the content of component (b), is 1.0 or more and 1.3 or less, and the content of component (a) and ( A liquid detergent composition in which the mass ratio (a)/(c) to the content of c) component is 1.1 or more and 3.5 or less ,
(a) contains a sulfosuccinic acid alkyl ester surfactant as a component,
Component (c) contains (c1) an alkyl glycoside type nonionic surfactant [hereinafter referred to as component (c1)] and (c2) an alkyl glyceryl ether type surfactant,
As components (e), (e1) a glycol ether obtained by adding 1 to 3 mol of oxyethylene and/or oxypropylene to a compound selected from monohydric alcohols and phenols having 1 to 6 carbon atoms, and (e2) Containing a benzenesulfonate optionally substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms,
Liquid detergent composition. (a) Component (a) contains at least one selected from polyoxyalkylene alkyl ether sulfate salts having an alkyl group having 8 to 18 carbon atoms and alkyl sulfate salts having an alkyl group having 8 to 18 carbon atoms. The liquid detergent composition according to claim 1 , wherein 3. The method according to claim 1 or 2, wherein the component (b) is one or more selected from an amine oxide surfactant having one hydrocarbon group having 8 to 18 carbon atoms and a sulfobetaine amphoteric surfactant. liquid detergent composition The liquid detergent composition according to any one of claims 1 to 3 , wherein the proportion of component (c1) in component (c) is 30% by mass or more. [(a) + (b)]/(c1), which is the mass ratio of the sum of the content of component (a) and the content of component (b) to the content of component (c1), is 3.0 or more and 10 The liquid detergent composition according to any one of claims 1 to 4 , wherein: The liquid detergent composition according to any one of claims 1 to 5 , which is for hard articles. 7. The liquid detergent composition according to any one of claims 1 to 6 , which is used for tableware and/or hard articles around the kitchen.