Compositions and methods for increasing the foam elasticity of foaming detergents

Abstract

This invention provides a technology to improve foam elasticity while suppressing an increase in pressing pressure for foaming detergents filled into foam dispensing containers. [Solution] A foam elasticity enhancing composition comprising one or more sugar alcohols selected from (a) to (c) below as an active ingredient, which is incorporated into a foaming detergent to impart an effect of increasing foam elasticity to the foaming detergent; (a) hydrolyzed hydrogenated starch having a sugar composition containing 1 to 10% by mass of monosaccharides, 6 to 12% by mass of disaccharides, 7 to 12% by mass of trisaccharides, 5 to 10% by mass of tetrasaccharides, and 64 to 82% by mass of pentasaccharides or more; (b) hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 to 16; (c) reduced maltose syrup.

Description

Technical Field

[0001] The present invention relates to a foaming detergent, a foaming detergent filled in a foam discharge container, a composition for increasing the foam elasticity of a foaming detergent, a composition for reducing the pressing pressure of a foam discharge container, and a method for reducing the pressing pressure of a foam discharge container.

Background Art

[0002] A detergent refers to a product aimed at removing dirt, and a foaming detergent refers to a detergent that generates bubbles by adding an appropriate amount of water and whipping, and has the property of foaming. Specific examples of foaming detergents include, for example, hair shampoos such as shampoos, solid soaps, makeup removers (cleansing), facial cleansers, body soaps, hand soaps, whole-body shampoos, food detergents, dish detergents, laundry detergents, industrial detergents, and the like.

[0003] In recent years, products filled in foam discharge containers such as pump formers and squeeze formers have become popular among such foaming detergents because they not only save the trouble of foaming but also have a creamy foam quality. On the other hand, in particular, for those used on the skin or hair such as facial cleansers, body soaps, and shampoos, a fine and elastic foam quality is preferred.

[0004] Generally, in order to improve the foam quality of a foaming detergent, a thickener such as a water-soluble polymer is used. However, in the detergent filled in a foam discharge container, there is a problem that the liquid viscosity rapidly increases due to the blending of the thickener, the pressing pressure of the container becomes high, and it becomes difficult to discharge the foam. Therefore, technologies have been researched and developed to improve the foam quality while suppressing the increase in the pressing pressure in a foam discharge container. For example, Patent Document 1 discloses a detergent that can discharge dense and elastic foam without a high pressing pressure from a non-aerosol former container by combining an anionic surfactant and a water-soluble polymer having specific viscosity characteristics.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-90488 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, even considering the relevant patent documents, there is still a shortage of cleaning agents that can dispense highly elastic foam from a foam dispensing container while suppressing an increase in pressing pressure. The present invention has been made to solve this problem and aims to provide a technology for improving foam elasticity while suppressing an increase in pressing pressure for foaming cleaning agents filled into a foam dispensing container. [Means for solving the problem]

[0007] As a result of diligent research, the inventors have found that by combining an N-acyl amino acid salt and a fatty acid alkanolamide in a foaming detergent, the pressing pressure when filling a foam dispensing container can be significantly reduced. Furthermore, they have found that by further incorporating one or more sugar alcohols selected from (a) to (c) below into the foaming detergent, the foam elasticity can be significantly increased. Based on these findings, the inventors have completed the following inventions.

[0008] (1) The foaming detergent according to the present invention is a foaming detergent filled in a foam dispensing container and contains the following (a) to (c); (a) N-acyl amino acid salts, (b) Fatty acid alkanolamides, (c) One or more sugar alcohols selected from (a) to (c); (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1-10% by mass of monosaccharides, 6-12% by mass of disaccharides, 7-12% by mass of trisaccharides, 5-10% by mass of tetrasaccharides, and 64-82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

[0009] (2) The foaming detergent according to the present invention may further contain (d) galactomannan hydrolysate and / or hydroxypropyl methylcellulose.

[0010] (3) The foaming detergent according to the present invention may contain (b) fatty acid alkanolamide in a mass ratio of (a) N-acyl amino acid salt: (b) fatty acid alkanolamide = 3:7 or less.

[0011] (4) The foaming detergent according to the present invention may contain a total amount of (a) N-acyl amino acid salt and (b) fatty acid alkanolamide of 20% by mass or less.

[0012] (5) The foaming detergent according to the present invention may contain (c) sugar alcohol in an amount of 0.1% by mass or more and less than 8% by mass.

[0013] (6) The foaming composition for increasing foam elasticity of foaming detergents according to the present invention comprises one or more sugar alcohols selected from (a) to (c) below as an active ingredient; (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1-10% by mass of monosaccharides, 6-12% by mass of disaccharides, 7-12% by mass of trisaccharides, 5-10% by mass of tetrasaccharides, and 64-82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

[0014] (7) The composition for reducing pushing pressure according to the present invention is a composition that reduces the pushing pressure of a foam discharge container when a foaming detergent containing N-acyl amino acid salt is filled into the container, and has a fatty acid alkanolamide as an active ingredient.

[0015] (8) A method for reducing the pushing pressure of a foam discharge container filled with a foaming detergent according to the present invention is characterized by blending a fatty acid alkanolamide into the raw materials of the foaming detergent containing N-acyl amino acid salt.

Effect of the Invention

[0016] According to the foaming detergent of the present invention, it is possible to generate highly elastic foam while suppressing an increase in the pushing pressure of the foam discharge container.

[0017] According to the composition for increasing foam elasticity of the present invention, it is possible to improve the elasticity of the foam of the foaming detergent.

[0018] According to the composition for reducing pushing pressure of the present invention, it is possible to provide an easy-to-use product that reduces the pushing pressure when a foaming detergent is filled into a foam discharge container and allows the foam to be easily discharged.

[0019] According to the method of the present invention, it is possible to reduce the pushing pressure of a foam discharge container filled with a foaming detergent.

Brief Description of the Drawings

[0020] [Figure 1] It is a table showing the raw materials used in this example. [Figure 2] It is a bar graph showing the increase rate of the pushing pressure of the pump head for foaming detergents blended with various anionic surfactants. [Figure 3] It is a bar graph showing the increase rate of the pushing pressure of the pump head for foaming detergents blended with various nonionic surfactants. [Figure 4] It is a bar graph showing the increase rate of the pushing pressure of the pump head for foaming detergents blended with various fatty acid alkanolamides. [Figure 5] This bar graph shows the percentage increase in pump head pressure for foaming detergents containing various amphoteric surfactants. [Figure 6] This bar graph shows the percentage increase in foam elasticity for foaming detergents containing various amphoteric surfactants. [Figure 7] This bar graph shows the percentage increase in pump head pressure for foaming detergents containing various sugar alcohols. [Figure 8] This bar graph shows the rate of increase in foam elasticity for foaming detergents containing various sugar alcohols. [Figure 9] This bar graph shows the percentage increase in pump head pressure for foaming detergents containing various water-soluble polymers. [Figure 10] This bar graph shows the rate of increase in foam elasticity for foaming detergents containing various water-soluble polymers. [Figure 11] This bar graph shows the percentage increase in pump head pressure for foaming detergents formulated with varying ratios of sodium lauroyl aspartate (amino acid-based anionic surfactant) and cocamide methyl MEA (nonionic surfactant). [Figure 12] This bar graph shows the rate of increase in foam elasticity for foaming detergents formulated with varying ratios of sodium lauroyl aspartate (amino acid-based anionic surfactant) and cocamide methyl MEA (nonionic surfactant). [Figure 13] This bar graph shows the percentage increase in pump head pressure for foaming detergents formulated with a 10% concentration of sodium lauroyl aspartate (an amino acid-based anionic surfactant) and varying concentrations of cocamide methyl MEA (a fatty acid alkanolamide nonionic surfactant) from 0% to 10%. [Figure 14] This bar graph shows the percentage increase in pump head pressure for foaming detergents formulated with varying amounts of hydrolyzed hydrogenated starch A (sugar alcohol). [Figure 15]This bar graph shows the rate of increase in foam elasticity for foaming detergents formulated with varying amounts of hydrolyzed hydrogenated starch A (sugar alcohol). [Figure 16] This bar graph shows the percentage increase in pump head pressure for foaming detergents formulated with varying amounts of galactomannan hydrolysate (water-soluble polymer). [Figure 17] This bar graph shows the rate of increase in foam elasticity for foaming detergents formulated with varying amounts of galactomannan hydrolysate (water-soluble polymer). [Modes for carrying out the invention]

[0021] The present invention will be described in detail below.

[0022] As described above, a "foaming detergent" refers to a detergent that generates bubbles and has the property of foaming when an appropriate amount of water is added and lathered. In this invention, bubbles may be simply referred to as "foam." Also, foam may be used synonymously with an aggregate of bubbles.

[0023] In the present invention, a foam dispensing container refers to a container that can mix a filled liquid with air and dispense it in a foamy state. Specific examples of foam dispensing containers include, for example, a squeeze former type that dispenses by pressing the body of a flexible container, and a pump former type that dispenses by pressing a pressure pump (pump head). While many foam dispensing containers are equipped with a porous membrane filter in the dispensing channel to dispense foam, the specifications such as the mesh size and number of filters are not particularly limited and can be used.

[0024] "Pressure" refers to the force required to press a part of the foam dispensing container (for example, the pump head in the case of a pump former, or the body in the case of a squeeze former) in order to dispense foam. Pressure can be confirmed by sensory testing, and as shown in the examples described later, it can also be evaluated by measuring the maximum load when the pump head of a pump former filled with detergent is pressed down a certain distance using a viscoelasticity measuring device, and using this as an indicator. In this case, the larger the maximum load, the greater the pressure can be judged to be.

[0025] In this specification, when comparing the pressure with and without a certain component, if the pressure is lower in the former case, it is expressed as "the pressure was reduced by the component." Similarly, when comparing the pressure with and without a certain component, if the pressure is lower in the former case, it is expressed as "the increase in pressure was suppressed by the component." The terms "reduction in pressure" and "suppression of pressure increase" may be used interchangeably.

[0026] "Foam elasticity" refers to the elasticity of the foam produced by foaming a foaming detergent. Foam elasticity can be confirmed by sensory testing, and as shown in the examples described later, the load when a certain volume of foam is pressed down is measured using a viscoelasticity measuring device, and the bulk modulus (N / m²) is determined. 2 It is also possible to calculate the elastic modulus and use this as an indicator for evaluation. In this case, a larger elastic modulus indicates greater foam elasticity.

[0027] The present invention is characterized by (a) incorporating (b) a fatty acid alkanolamide into the raw materials of a foaming detergent containing an N-acyl amino acid salt, thereby suppressing or reducing the increase in pressure when the foaming detergent is filled into a foam dispensing container.

[0028] In other words, the present invention also provides a composition for reducing the pressure when a foaming detergent containing an N-acyl amino acid salt is filled into a foam dispensing container, wherein the composition for reducing the pressure comprises a fatty acid alkanolamide as an active ingredient. Furthermore, the present invention also provides a method for reducing the pressure of a foam dispensing container filled with a foaming detergent. This method is characterized by incorporating a fatty acid alkanolamide into the raw materials of the foaming detergent containing an N-acyl amino acid salt.

[0029] (a) N-acyl amino acid salts are amino acid-based anionic surfactants. The acyl group of an N-acyl amino acid salt can be derived from fatty acids having a straight or branched chain, saturated or unsaturated, with 4 to 22 or 8 to 18 carbon atoms. Examples of such fatty acids include butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, arachidic acid, behenic acid, erucic acid, and docosahexaenoic acid. The derived fatty acid may be a mixture of the above fatty acids, for example, obtained from coconut oil, palm kernel oil, etc.

[0030] Furthermore, the amino acid portion of N-acyl amino acid salts (including compounds having both an amino group and a carboxyl group in one molecule, as well as compounds having both an amino group and a sulfo group in one molecule) can be exemplified by neutral amino acids (glycine, alanine, sarcosine (N-methylglycine), threonine, etc.), acidic amino acids (glutamic acid, aspartic acid), and taurine. These amino acid portions may be D-forms, L-forms, or mixtures of D-forms and L-forms.

[0031] Examples of N-acyl amino acids include, for example, caproyl methyl taurine, lauroyl aspartic acid, lauroyl glutamic acid, lauroyl methyl-β-alanine, lauroyl methylalanine, lauroyl sarcosine, lauroyl threonine, lauroyl taurine, myristoyl glutamic acid, myristyl aspartic acid, myristoyl methylalanine, myristoyl methyl taurine, palmitoyl methyl taurine, stearoyl methyl taurine, oleoyl methyl taurine, cocoyl glutamic acid, cocoyl glycine, cocoyl alanine, cocoyl taurine, cocoyl methyl taurine, cocoyl sarcosine, cocoyl threonine, and palm fatty acid glutamic acid.

[0032] Examples of N-acyl amino acid salts include alkali metal salts such as sodium and potassium; alkaline earth metal salts such as magnesium; other inorganic salts such as aluminum and zinc; ammonium salts; organic amine salts such as monoethanolamine, diethanolamine, triethanolamine, AMP (2-amino-2-methyl-1-propanol), and 2-amino-2-hydroxymethyl-1,3-propanediol; basic amino acid salts such as arginine, lysine, histidine, and ornithine; and other organic salts such as taurine salts. The salts may be used individually or in combination of two or more.

[0033] (b) Fatty acid alkanolamides are nonionic surfactants that have been conventionally used as thickeners. Surprisingly, in the present invention, when used in combination with N-acyl amino acid salts, they exert the effect of reducing the pressure of the foam dispensing container. Fatty acid alkanolamides may be monoalkanolamines or dialkanolamines. They may also be secondary or tertiary amines. The fatty acids constituting the alkanolamide may be linear or branched, and may be saturated or unsaturated. Examples of fatty acids with 10 to 20 carbon atoms include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid. The derived fatty acids may be mixed fatty acids of the above fatty acids, for example, obtained from coconut oil, palm kernel oil, etc.

[0034] Examples of fatty acid alkanolamides include, for example, coconut oil fatty acid N-methylethanolamide (cocamide methyl MEA), coconut oil fatty acid monoethanolamide (cocamide MEA), coconut oil fatty acid diethanolamide (cocamide DEA), palm kernel oil fatty acid diethanolamide (palm kernel fatty acid amide DEA), lauric acid monoethanolamide, lauric acid diethanolamide (lauramide DEA), lauric acid myristic acid diethanolamide ((lauramide / myristamide) DEA), stearic acid monoethanolamide (stearamide MEA), stearic acid diethanolamide (stearamide DEA), oleic acid diethanolamide (oleamide DEA), and lauric acid monoisopropanolamide (lauramide MIPA).

[0035] Furthermore, specific examples of polyalkylene oxide fatty acid alkanolamides include, for example, POE coconut oil fatty acid monoethanolamide (PEG-3 cocamide, PEG-6 cocamide, PEG-11 cocamide), POE lauric acid monoethanolamide (PEG-3 lauramide), polyoxypropylene coconut oil fatty acid monoisopropanolamide (PPG-2 cocamide), and polyoxypropylene myristic acid monoethanolamide. These fatty acid alkanolamides may be used individually or in combination of two or more.

[0036] In addition to (a) and (b) described above, the present invention is characterized by (c) incorporating the sugar alcohols (a) to (c) below into the foaming detergent, thereby suppressing the increase in pressing pressure while increasing (increasing) the foam elasticity; (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1-10% by mass of monosaccharides, 6-12% by mass of disaccharides, 7-12% by mass of trisaccharides, 5-10% by mass of tetrasaccharides, and 64-82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

[0037] In other words, the present invention also provides a composition for increasing the foam elasticity of foaming detergents, comprising the sugar alcohols described in (a) to (c) above as active ingredients.

[0038] Sugar alcohols are polyhydric alcohols formed when the carbonyl group (aldehyde group or ketone group) of a carbohydrate is reduced. Sugar alcohols obtained by reducing hydrolyzed starch (corn syrup) are also called hydrolyzed hydrogenated starch (reduced corn syrup). Sugar alcohols obtained by reducing maltose syrup are called reduced maltose syrup.

[0039] Sugar composition refers to the mass percentage of each sugar relative to the total mass of sugars. In other words, it is the mass percentage of each sugar relative to the total mass of sugars, which is set to 100. Sugar composition can be confirmed using high-performance liquid chromatography (HPLC). Specifically, hydrolyzed hydrogenated starch is subjected to HPLC as a sample to obtain a chromatogram. In this chromatogram, the sum of the areas of all peaks corresponds to the "total mass of sugars," and the area of ​​each peak corresponds to the "mass of each sugar." Therefore, the mass percentage of each sugar in the sample can be calculated as the ratio of the area of ​​each peak to the sum of the areas of all detected peaks. HPLC conditions can be set appropriately according to standard procedures, but the following conditions are examples. HPLC conditions Column; MCI GEL CK04S (10mm ID x 200mm) Eluent; high purity water Flow rate; 0.4mL / min Injection volume: 20μL Column temperature: 65°C Detection; Differential refractive index detector RI-10A (Shimadzu Corporation)

[0040] Dextrose equivalent (DE) is a value conventionally used as an indicator of the degree of saccharification of corn syrup. DE is the percentage of reducing sugars in a sample when those reducing sugars are measured as glucose, relative to the total solid content. The maximum DE is 100, meaning that all of the solid content is glucose, and the smaller the DE, the more oligosaccharides and polysaccharides there are. In other words, (a) "hydrolyzed hydrogenated starch obtained by reducing corn syrup with a DE of 14 or more and 16 or less" can be said to be hydrolyzed hydrogenated starch obtained by reducing corn syrup with a relatively low degree of saccharification.

[0041] The DE of corn syrup can be measured by the following method. 《Method for measuring DE》 Accurately weigh 2.5 g of the sample and dissolve it in water to make 200 mL. Measure 10 mL of this solution, add 10 mL of 1 / 25 mol / L iodine solution (Note 1) and 15 mL of 1 / 25 mol / L sodium hydroxide solution (Note 2), and leave in the dark for 20 minutes. Next, add 5 mL of 2 mol / L hydrochloric acid (Note 3) and mix, then titrate with 1 / 25 mol / L sodium thiosulfate solution (Note 4). When the solution turns slightly yellow near the titration endpoint, add 2 drops of starch indicator (Note 5) and continue the titration. The titration endpoint is reached when the color of the solution disappears. Determine the blank value using water and calculate DE using the following formula 1. (Note 1) 1 / 25 mol / L iodine solution: Place 20.4 g of potassium iodide and 10.2 g of iodine in a 2 L volumetric flask, dissolve with a small amount of water, then add water to the mark. (Note 2) 1 / 25 mol / L sodium hydroxide solution: Place 3.2 g of sodium hydroxide in a 2 L volumetric flask, dissolve it with a small amount of water, and then add water up to the mark. (Note 3) 2 mol / L hydrochloric acid: Gradually add 150 mL of hydrochloric acid to 750 mL of water while stirring. (Note 4) 1 / 25 mol / L sodium thiosulfate solution: Place 20 g of sodium thiosulfate in a 2 L volumetric flask, dissolve with a small amount of water, then add water to the mark. (Note 5) Starch indicator: Dissolve 5 g of soluble starch in 500 mL of water, and then dissolve 100 g of sodium chloride in this solution. TIFF2026095715000002.tif49165

[0042] (c) Reduced maltose syrup is produced by reducing maltose syrup and is characterized by its high content of maltitol, a disaccharide alcohol. However, it is a mixture that also contains monosaccharides, trisaccharides, and sugar alcohols of four or more saccharides. An example of the proportion of maltitol in the sugar composition is 75% by mass or more.

[0043] The foaming cleanser according to the present invention may further contain (d) galactomannan hydrolysate and / or hydroxypropyl methylcellulose. Incorporating galactomannan hydrolysate and / or hydroxypropyl methylcellulose can improve foam elasticity or enhance skin moisture retention after use of the cleanser while suppressing an increase in pressure.

[0044] Galactomannan is a polysaccharide composed of a linear main chain made of mannose bonded to side chains made of galactose. Galactomannan hydrolysates are galactomannan that has been broken down (reduced to lower molecular weight). Acids or enzymes are generally used for this breakdown. Examples of galactomannan include guar gum (mannose to galactose ratio of 2:1), tara gum (3:1), and locust bean gum (4:1). The molecular weight of galactomannan hydrolysates only needs to be smaller than that of galactomannan; specifically, examples include 1 / 180 to 1 / 10 of the raw material galactomannan, i.e., a molecular weight of 5,000 to 100,000.

[0045] Hydroxypropyl methylcellulose (HPMC) is a cellulose derivative obtained by introducing methoxy groups (-OCH3) and hydroxypropoxy groups (-OCH2CHOHCH3) into the cellulose backbone. In the present invention, the viscosity, molecular weight, particle size, degree of substitution of methoxy groups (average number of hydroxyl groups substituted with methoxy groups per glucose ring unit of cellulose), and number of moles of substituted hydroxypropoxy groups (average number of moles of hydroxypropoxy groups added per glucose ring unit of cellulose) of HPMC can be set as appropriate, and HPMC with specifications generally used in cosmetics and hygiene products can be used.

[0046] In the present invention, (a) N-acyl amino acid salt, (b) fatty acid alkanolamide, (c) sugar alcohol, and (d) galactomannan hydrolysate and hydroxypropyl methylcellulose can be commercially available.

[0047] The foaming detergent of the present invention can be manufactured by mixing the above (a) to (d) and a solvent such as water according to conventional methods. The foaming detergent of the present invention may contain components other than those above (a) to (d) as long as they do not impair the effects of the present invention. Examples of such other components include solvents or dispersion media such as water, polyhydric alcohols such as ethanol, glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, and pentylene glycol, sugars such as sorbitol, nonionic surfactants, cationic surfactants, amphoteric surfactants, pH adjusters, colorants, plant and animal extracts, vitamins and their derivatives, chelating agents, inorganic or organic salts, solubilizers, preservatives, bactericides, wetting agents, UV absorbers, thickeners, fragrances, cationic polymers, cooling agents, and solubilizers. These other components may be added as needed during or after the preparation of the detergent. In particular, as will be shown in the examples described later, amphoteric surfactants have little effect on foam elasticity and pressure, so they can be used regardless of their structure or type.

[0048] The form of the cleaning agent of the present invention is not particularly limited, but for example, it can be in liquid form.

[0049] The blending ratio of (a) N-acyl amino acid salt and (b) fatty acid alkanolamide can be appropriately set depending on the application of the foaming detergent, the desired foam quality, feel, and the type and amount of other components. In particular, as shown in the examples described later, fatty acid alkanolamide can exert the effect of reducing pressure and improving foam elasticity even in very small amounts. Furthermore, from the viewpoint of foam elasticity, it is considered that there is no problem even if the amount of fatty acid alkanolamide is significantly greater than that of N-acyl amino acid salt. From the viewpoint of pressure, examples include a ratio of N-acyl amino acid salt:fatty acid alkanolamide = 4:6 or less or 3:7 or less.

[0050] The total amount of (a) N-acyl amino acid salt and (b) fatty acid alkanolamide can also be appropriately set depending on the intended use of the detergent, the desired foam quality, feel, and the type and amount of other components. As shown in the examples described later, fatty acid alkanolamide exhibits a pressure-reducing effect even in very small amounts, and from the viewpoint of making the most of this effect, a total amount of N-acyl amino acid salt and fatty acid alkanolamide of 20% by mass or less can be exemplified.

[0051] (c) The amount of sugar alcohol can also be appropriately set depending on the intended use of the detergent, the desired foam quality, feel, and the type and amount of other ingredients. As shown in the examples described later, sugar alcohol exhibits an effect of increasing foam elasticity even in very small amounts (for example, 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, 0.5% by mass or more, 0.6% by mass or more, 0.7% by mass or more, 0.8% by mass or more, 0.9% by mass or more), and from the viewpoint of this effect, it is considered that there is no problem even if the amount is large. From the viewpoint of pressure, an example of a sugar alcohol content of less than 8% by mass can be given.

[0052] (d) The amount of galactomannan hydrolysate and / or hydroxypropyl methylcellulose can also be appropriately set depending on the application of the detergent, the desired foam quality, feel, and the type and amount of other components. As shown in the examples described later, these water-soluble polymers exhibit an effect of increasing foam elasticity even in very small amounts (e.g., 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, 0.5% by mass or more, 0.6% by mass or more, 0.7% by mass or more, 0.8% by mass or more, 0.9% by mass or more), and from the viewpoint of this effect, it is considered that there is no problem even if the amount is large. From the viewpoint of pressure, examples of the amount of these water-soluble polymers can be less than 6% by mass.

[0053] The present invention will be described below based on various examples. However, the technical scope of the present invention is not limited to the features shown in these examples. Furthermore, in these examples, "%" represents mass %((w / w)%) unless otherwise specified. [Examples]

[0054] <Test Method> Unless otherwise specified, the tests were conducted using the following methods. (1) Raw materials used A cleaning agent was manufactured using the raw materials shown in Figure 1 (all commercially available products).

[0055] (2) Manufacturing of foaming liquid detergents The foaming liquid detergent (hereinafter simply referred to as "detergent") was prepared by mixing and dissolving each component in water according to the formulations shown in each example. The hydrogen ion concentration of the detergent was adjusted to pH 6 by adding citric acid and / or sodium hydroxide. In the formulations in each example (Tables 1 to 14), the solid content concentration (pure concentration) of each component is shown as a mass percentage, rather than the amount used in commercially available products. In this case, the concentration of lauryl glucoside was calculated as 50%, the concentration of hydroxypropyl methylcellulose as 100%, and the concentration of ethylhexylglycerin as 100%. The prepared detergent was filled into a pump foamer-type foam dispensing container (capacity: 80 mL, dispensing amount: 0.35 g, number of filters: 2, mesh size: 200 mesh and 100 mesh) (sometimes simply referred to as "pump foamer").

[0056] (3) Evaluation of pressure A pump former filled with cleaning fluid or an empty pump former was fixed to the table of a viscoelasticity measuring device (SUN RHEO METER, COMPAC-100II, Sun Science), and the maximum load (N) when the pump head was pressed down was measured. The measurement conditions were: adapter: none (the pump head was pressed with a 10 mm diameter adapter connection terminal), penetration distance: 10 mm, table speed: 1 mm / sec, and sample temperature: 25°C. Measurements were performed three times for each sample, and the average value of the maximum load was calculated. For the maximum load when using a pump former filled with cleaning fluid as the sample, the percentage was calculated with the maximum load when using an empty pump former as the sample being set to 100%, and this was defined as the pressure increase rate (%). A larger pressure increase rate indicates a greater effect in increasing the force (pressure) required to press down the pump head, while a smaller value indicates a smaller effect in increasing the pressure.

[0057] (4) Evaluation of foam elasticity The pump head of a pump former filled with cleaning agent was pressed down to fill a container (60 mm in diameter, 50 mm in height) to the brim with foamy cleaning agent. This container was fixed to the table of a viscoelasticity measuring device (SUN RHEO METER, COMPAC-100II, Sun Science), and the load when the foam was pressed with an adapter was measured to calculate the bulk modulus (N). The measurement conditions were: adapter: No. 25 (30 mm in diameter), penetration distance: 5 mm, table speed: 1 mm / sec, sample temperature: 25°C. Measurements were performed three times for each sample to calculate the bulk modulus (N / m²). 2 The average value of ) was calculated. For the "bulk modulus of the sample containing the nonionic surfactant," the percentage was calculated with the "bulk modulus of the sample without the nonionic surfactant" set to 100%, and this was defined as the elasticity increase rate (%). The larger the value of this elasticity increase rate, the greater the effect of increasing foam elasticity, and the smaller the value, the smaller the effect of increasing foam elasticity.

[0058] <Example 1> Investigation of anionic surfactants Detergent formulations were prepared using anionic surfactants such as sodium lauroyl aspartate (amino acid-based, N-acyl amino acid salt), sodium laureth sulfate (sulfate ester salt), sodium olefin (C14-16) sulfonate (sulfonate salt), or sodium laureth-6 carboxylate (carboxylate salt), and designated as Nos. 1 to 4. Their formulations are shown in Table 1. Subsequently, the pressing pressure was evaluated for Nos. 1 to 4, and the pressing pressure increase rate was determined. The results are shown in Figure 2. [Table 1]

[0059] As shown in Figure 2, the increase in pressing pressure exceeded 107% for No. 2 (sodium laureth sulfate (sulfate ester)), No. 3 (sodium olefin (C14-16) sulfonate (sulfonate)), and No. 4 (sodium laureth-6 carboxylate (carboxylate)), while for No. 1 (sodium lauroyl aspartate (amino acid-based, N-acyl amino acid salt)), the increase was 101.14%, which was significantly smaller than 100%. In other words, the pressing pressure hardly increased with detergents containing sodium lauroyl aspartate (N-acyl amino acid salt, amino acid-based anionic surfactant). From these results, it became clear that the increase in pressing pressure of a foaming liquid detergent can be suppressed by incorporating an N-acyl amino acid salt.

[0060] <Example 2> Investigation of nonionic surfactants (1) Various nonionic surfactants Detergent formulations were prepared using nonionic surfactants such as cocamide methyl MEA (fatty acid alkanolamide), PEG-80 sorbitan laurate and polysorbate 80 (polyoxyethylene sorbitan fatty acid ester), PEG-7 glyceryl coconut oil fatty acid (polyoxyethylene glycerin fatty acid ester), PEG-150 stearate (polyoxyethylene fatty acid ester), polyglyceryl-10 laurate (polyglycerin fatty acid ester), laureth-10 (polyoxyethylene alkyl ether), and lauryl glucoside (alkyl glucoside), and were designated as Nos. 1 to 8. Their formulations are shown in Table 2. Subsequently, the pressing pressure was evaluated for Nos. 1 to 8, and the pressing pressure increase rate was determined. The results are shown in Figure 3. [Table 2]

[0061] As shown in Figure 3, the increase in pressing pressure exceeded 106% for No. 2 (PEG-80 sorbitan laurate (polyoxyethylene sorbitan fatty acid ester)), No. 3 (polysorbate 80 (polyoxyethylene sorbitan fatty acid ester)), No. 4 (PEG-7 glyceryl coconut oil fatty acid (polyoxyethylene glycerin fatty acid ester)), No. 5 (PEG-150 stearate (polyoxyethylene fatty acid ester)), No. 6 (polyglyceryl-10 laurate (polyglycerin fatty acid ester)), No. 7 (laureth-10 (polyoxyethylene alkyl ether)), and No. 8 (lauryl glucoside (alkyl glucoside)). In contrast, No. 1 (cocamide methyl MEA (fatty acid alkanolamide)) showed a significantly smaller increase of 101.14% compared to 100%. In other words, the pressing pressure hardly increased with the cleansing agent containing cocamide methyl MEA (fatty acid alkanolamide). These results revealed that incorporating fatty acid alkanolamide into foaming liquid detergents can suppress the increase in pressure in the foam dispensing container.

[0062] (2) Various fatty acid alkanolamides A detergent was prepared without nonionic surfactants and designated as No. 1. Additionally, detergents were prepared using cocamide methyl MEA, cocamide DEA, or cocamide MEA as fatty acid alkanolamides and designated as Nos. 2-4. Their formulations are shown in Table 3. Next, the pressure was evaluated for Nos. 1-4 to determine the pressure increase rate. The results are shown in Figure 4. [Table 3]

[0063] As shown in Figure 4, the increase in compressive pressure was 110.40% for No. 1 (no nonionic surfactant), 104.72% for No. 2 (cocamide methyl MEA), 105.31% for No. 3 (cocamide DEA), and 104.40% for No. 4 (cocamide MEA). The increase in compressive pressure for No. 2 to 4 was significantly smaller than that for No. 1. Furthermore, the increase in compressive pressure was almost the same for No. 2 to 4.

[0064] Specifically, detergents containing cocamide methyl MEA, cocamide DEA, or cocamide MEA showed a significantly lower pressure than those without nonionic surfactants. Furthermore, this pressure reduction effect was almost identical when using cocamide methyl MEA (monoethanolamide with a methyl group), cocamide DEA (dinoethanolamide), and cocamide MEA (monoethanolamide). From these results, it became clear that the pressure of a foaming liquid detergent can be reduced by incorporating fatty acid alkanolamides. It also became clear that fatty acid alkanolamides, regardless of their type or structure, exhibit this pressure reduction effect.

[0065] <Example 3> Investigation of amphoteric surfactants (1) Evaluation of pressure A detergent was prepared without amphoteric surfactants and designated as No. 1. Additionally, detergents were prepared using lauryl betaine (alkyl betaine type), lauramidopropyl hydroxysultaine (sulfobetaine type), or sodium cocoamphoacetate (glycine type) as amphoteric surfactants and designated as Nos. 2-4. Their formulations are shown in Table 4. Next, the pressure was evaluated for Nos. 1-4 to determine the pressure increase rate. The results are shown in Figure 5. [Table 4]

[0066] As shown in Figure 5, the increase in pressing pressure was 104.72% for No. 1 (no amphoteric surfactant), 106.99% for No. 2 (lauryl betaine (alkyl betaine type)), 105.94% for No. 3 (lauramidopropyl hydroxultaine (sulfobetaine type)), and 105.93% for No. 4 (sodium cocoamphoacetate (glycine type)). Nos. 2-4 were all equivalent to or slightly higher than No. 1. In other words, the pressing pressure of detergents containing lauryl betaine, lauramidopropyl hydroxultaine, or sodium cocoamphoacetate was equivalent to or slightly higher than that without amphoteric surfactants. From these results, it became clear that amphoteric surfactants do not exert an effect of reducing or suppressing the increase in pressing pressure of foam dispensing containers in foaming liquid detergents.

[0067] (2) Evaluation of foam elasticity Detergents No. 1-1 and No. 1-2 were prepared as detergents that do not contain amphoteric surfactants. In addition, detergents No. 2-1 and No. 2-2 were prepared as detergents containing lauryl betaine, No. 3-1 and No. 3-2 as detergents containing lauramidopropyl hydroxysultaine, and No. 4-1 and No. 4-2 as detergents containing sodium cocoamphoacetate. Note that No. 1-2, No. 2-2, No. 3-2, and No. 4-2 do not contain nonionic surfactants, while the others have the same composition as No. 1-1, No. 2-1, No. 3-1, and No. 4-1, respectively. These formulations are shown in Table 5. [Table 5]

[0068] Next, the foam elasticity was evaluated for No. 1-1 to No. 4-2 to determine the elasticity increase rate. Specifically, for No. 1-1, the elasticity increase rate was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 1-2 set to 100%. Similarly, for No. 2-1, No. 3-1, and No. 4-1, the elasticity increase rate was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 2-2, No. 3-2, and No. 4-2 set to 100%. The results are shown in Figure 6.

[0069] As shown in Figure 6, the rate of increase in elasticity was 104.65% for No. 1-1 (no amphoteric surfactant), 102.99% for No. 2-1 (lauryl betaine (alkyl betaine type)), 102.74% for No. 3-1 (lauramidopropyl hydroxysultaine (sulfobetaine type)), and 103.06% for No. 4-1 (sodium cocoamphoacetate (glycine type)), with Nos. 2-4 being equivalent to No. 1. In other words, detergents containing lauryl betaine (alkyl betaine type amphoteric surfactant), lauramidopropyl hydroxysultaine (sulfobetaine type amphoteric surfactant), or sodium cocoamphoacetate (glycine type amphoteric surfactant) did not show an increase in foam elasticity compared to those without amphoteric surfactants. From these results, it is clear that amphoteric surfactants do not exhibit an effect of increasing foam elasticity in foaming liquid detergents.

[0070] <Example 4> Investigation of sugar alcohols (1) Evaluation of pressure A cleaning agent was prepared without sugar alcohols and designated as No. 1. Cleaning agents were also prepared using hydrolyzed hydrogenated starch A, hydrolyzed hydrogenated starch B, hydrolyzed hydrogenated starch C, hydrolyzed hydrogenated starch D, sorbitol, and reduced maltose syrup as sugar alcohols, designated as Nos. 2-7. The formulations of the cleaning agents are shown in Table 6, and the sugar composition of each sugar alcohol is shown in Table 7. Next, the pressure was evaluated for Nos. 1-7 to determine the pressure increase rate. The results are shown in Figure 7. [Table 6]

[0071] [Table 7]

[0072] As shown in Figure 7, the increase in pressure was 102.04% for No. 1 (no sugar alcohol), 107.00% for No. 2 (hydrolyzed hydrogenated starch A), 107.10% for No. 3 (hydrolyzed hydrogenated starch B), 107.87% for No. 4 (hydrolyzed hydrogenated starch C), 106.86% for No. 5 (hydrolyzed hydrogenated starch D), 109.29% for No. 6 (sorbitol), and 107.49% for No. 7 (reduced maltose syrup). All of Nos. 2 to 7 showed slightly higher increases compared to No. 1. Furthermore, the increase in pressure was almost the same among Nos. 2 to 7.

[0073] Specifically, the pressing force of detergents containing hydrolyzed hydrogenated starch A, hydrolyzed hydrogenated starch B, hydrolyzed hydrogenated starch C, hydrolyzed hydrogenated starch D, sorbitol, or reduced maltose syrup was slightly greater than that of detergents without sugar alcohols. This result clearly shows that adding sugar alcohols to foaming liquid detergents slightly increases the pressing force. Furthermore, it was found that this effect of increasing pressing force was similar regardless of the type or structure of the sugar alcohol.

[0074] (2) Evaluation of foam elasticity Detergents No. 1 and No. 8 were prepared as detergents without sugar alcohols. Detergents No. 2 to 7 were prepared as detergents containing various sugar alcohols. Note that No. 8 is a detergent with the same composition as Nos. 1 to 7, except that it does not contain nonionic surfactants or sugar alcohols. These formulations are shown in Table 8. Next, the foam elasticity of Nos. 1 to 8 was evaluated to determine the elasticity increase rate. Specifically, for Nos. 1 to 7, the elasticity increase rate was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 8 set to 100%. The results are shown in Figure 8. [Table 8]

[0075] As shown in Figure 8, the rate of increase in elasticity was 102.07% for No. 1 (no sugar alcohol), 123.40% for No. 2 (hydrolyzed hydrogenated starch A), and 123.53% for No. 7 (reduced maltose syrup), all significantly larger than No. 1. On the other hand, No. 3 (hydrolyzed hydrogenated starch B) was 101.52%, No. 4 (hydrolyzed hydrogenated starch C) was 102.35%, No. 5 (hydrolyzed hydrogenated starch D) was 105.45%, and No. 6 (sorbitol) was 102.90%, all of which were equivalent to No. 1. In other words, the rate of increase in elasticity was significantly larger in detergents containing hydrolyzed hydrogenated starch A or reduced maltose syrup as the sugar alcohol. These results revealed that foam elasticity can be significantly increased by incorporating "hydrolyzed hydrogenated starch with a sugar composition containing 1-10% by mass of monosaccharides, 6-12% by mass of disaccharides, 7-12% by mass of trisaccharides, 5-10% by mass of tetrasaccharides, and 64-82% by mass of pentasaccharides or more" or "hydrolyzed hydrogenated starch obtained by reducing hydrolyzed starch with a dextrose equivalent of 14 to 16" or "reduced maltose syrup" into a foaming liquid detergent.

[0076] <Example 5> Investigation of water-soluble polymers (1) Evaluation of pressure A detergent was prepared without water-soluble polymers and designated as No. 1. Additionally, detergents were prepared using galactomannan hydrolysate, inulin, and hydroxypropyl methylcellulose as water-soluble polymers, designated as Nos. 2-4. These formulations are shown in Table 9. Next, the pressure was evaluated for Nos. 1-4 to determine the pressure increase rate. The results are shown in Figure 9. [Table 9]

[0077] As shown in Figure 9, the increase in pressing pressure was 107.00% for No. 1 (no water-soluble polymer), 107.00% for No. 2 (galactomannan hydrolysate), 112.36% for No. 3 (inulin), and 108.16% for No. 4 (hydroxypropyl methylcellulose). In other words, No. 3 was greater than No. 1, while No. 2 and No. 4 were equivalent to No. 1. That is, the pressing pressure of detergents containing galactomannan hydrolysate or hydroxypropyl methylcellulose was equivalent to that of detergents without water-soluble polymers. From these results, it is clear that when water-soluble polymers are incorporated into foaming liquid detergents, the increase in pressing pressure can be suppressed by using galactomannan hydrolysate or hydroxypropyl methylcellulose.

[0078] (2) Evaluation of foam elasticity Detergents No. 1 and No. 5 were prepared as detergents without water-soluble polymers. Detergents No. 2 to 4 were prepared as detergents containing various water-soluble polymers. Note that No. 5 is a detergent with the same composition as Nos. 1 to 4, except that it does not contain nonionic surfactants, sugar alcohols, or water-soluble polymers. These formulations are shown in Table 10. Next, the foam elasticity of Nos. 1 to 5 was evaluated to determine the elasticity increase rate. Specifically, for Nos. 1 to 4, the elasticity increase rate was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 5 set to 100%. The results are shown in Figure 10. [Table 10]

[0079] As shown in Figure 10, the rate of increase in elasticity was 123.40% for No. 1 (no water-soluble polymer), 125.74% for No. 2 (galactomannan hydrolysate), 126.43% for No. 3 (inulin), and 127.61% for No. 4 (hydroxypropyl methylcellulose). All of Nos. 2 to 4 showed slightly higher increases than No. 1. Furthermore, the rate of increase in elasticity was almost the same among Nos. 2 to 4. In other words, the effect of increasing foam elasticity was slightly greater in detergents containing galactomannan hydrolysate, inulin, or hydroxypropyl methylcellulose. From these results, it became clear that the foam elasticity can be slightly increased by incorporating a water-soluble polymer into a foaming liquid detergent. It also became clear that the effect of increasing foam elasticity was exhibited to a similar extent regardless of the molecular weight or structure of the water-soluble polymer.

[0080] <Example 6> Examination of surfactant blending ratio Detergent formulations were prepared by varying the mixing ratio of sodium lauroyl aspartate (anionic surfactant) and cocamide methyl MEA (nonionic surfactant) (abbreviated as "anionic:nonionic" in this example) from 10:0 to 5:5, and these were designated as Nos. 1 to 6. Their formulations are shown in Table 11. [Table 11]

[0081] (1) Evaluation of pressure The pressure was evaluated for No. 1 to 6, and the pressure increase rate was calculated. The results are shown in Figure 11. As shown in Figure 11, the pressure increase rate was 116.85% for No. 1 (anion:nonion=10:1), 107.94% for No. 2 (anion:nonion=9.5:0.5), 103.52% for No. 3 (anion:nonion=9:1), 105.69% for No. 4 (anion:nonion=8:2), 106.83% for No. 5 (anion:nonion=7:3), and 110.84% ​​for No. 6 (anion:nonion=5:5). The pressure increases for No. 2 to 6 were all significantly smaller compared to No. 1.

[0082] Specifically, in a detergent containing sodium lauroyl aspartate and cocamide methyl MEA in an anionic:nonionic ratio of 9.5:0.5 to 5:5, the pressure exerted was significantly lower compared to a detergent without these compounds. This result revealed that in foaming liquid detergents, fatty acid alkanolamides can reduce pressure even in very small amounts. Furthermore, it was considered that a pressure-reducing effect could be obtained if the ratio of fatty acid alkanolamide to N-acyl amino acid salt:fatty acid alkanolamide was 5:5 or less, 4:6 or less, or 3:7 or less.

[0083] (2) Evaluation of foam elasticity The foam elasticity was evaluated for samples No. 1 to 6 to determine the rate of increase in elasticity. Specifically, for samples No. 2 to 6, the rate of increase in elasticity was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 1 set to 100%. The results are shown in Figure 12. As shown in Figure 12, the rate of increase in elasticity was 126.37% for No. 2 (anion:nonion=9.5:0.5), 131.53% for No. 3 (anion:nonion=9:1), 127.81% for No. 4 (anion:nonion=8:2), 126.97% for No. 5 (anion:nonion=7:3), and 126.54% for No. 6 (anion:nonion=5:5) compared to 100% for No. 1 (anion:nonion=10:0). All of the rates of increase in elasticity for No. 2 to 6 were significantly higher than for No. 1. Furthermore, the rate of increase in elasticity was almost the same between No. 2 and No. 4.

[0084] In other words, the foam elasticity of the detergent containing cocamide methyl MEA was significantly greater compared to the detergent without it. Furthermore, the degree of increase in foam elasticity was almost the same regardless of the proportion of cocamide methyl MEA used. From these results, it became clear that in foaming liquid detergents, fatty acid alkanolamides can increase foam elasticity regardless of their proportion.

[0085] <Example 7> Examination of surfactant formulation Detergent formulations were prepared by varying the amount of sodium lauroyl aspartate (anionic surfactant) at 10% and the amount of cocamide methyl MEA (nonionic surfactant) from 0% to 10%, resulting in formulations No. 1 to 6. In other words, formulations No. 1 to 6 represent detergent formulations in which the total amount of sodium lauroyl aspartate and cocamide methyl MEA varied from 10% to 20%. These formulations are shown in Table 12. The pressing pressure was evaluated for No. 1 to 6, and the rate of increase in pressing pressure was determined. The results are shown in Figure 13. [Table 12]

[0086] As shown in Figure 13, the increase in compressive force was 116.85% for No. 1 (10% anion, 0% nonion), compared to 105.40% for No. 2 (10% anion, 1% nonion), 103.20% for No. 3 (10% anion, 1.5% nonion), 105.69% for No. 4 (10% anion, 2% nonion), 105.17% for No. 5 (10% anion, 5% nonion), and 115.95% for No. 6 (10% anion, 10% nonion). All of Nos. 2-6 were smaller than No. 1. In particular, Nos. 2-5 were significantly smaller than No. 1, and No. 6 was slightly smaller than No. 1.

[0087] Specifically, in detergents containing 1-10% cocamide methyl MEA (10-20% total of sodium lauroyl aspartate and cocamide methyl MEA), the pressure exerted was lower compared to those without cocamide methyl MEA. This result revealed that in foaming liquid detergents, fatty acid alkanolamides can reduce pressure even in very small amounts. Furthermore, it was found that the total amount of N-acyl amino acid salts and fatty acid alkanolamides is preferably 20% or less from the viewpoint of reducing pressure.

[0088] <Example 8> Examination of sugar alcohol content Detergent No. 1 was prepared as a detergent that does not contain nonionic surfactants or sugar alcohols. Detergents No. 2 to 6 were prepared as detergents containing 1-16% hydrolyzed hydrogenated starch A (sugar alcohol). Their formulations are shown in Table 13. [Table 13]

[0089] (1) Evaluation of pressure The pressure was evaluated for samples No. 1 to 6, and the pressure increase rate was determined. The results are shown in Figure 14. As shown in Figure 14, the pressure increase rate was 110.40% for No. 1 (no sugar alcohol or nonionic surfactant), 107.94% for No. 2 (1% hydrolyzed hydrogenated starch A), 107.00% for No. 3 (2% hydrolyzed hydrogenated starch A), and 108.49% for No. 4 (4% hydrolyzed hydrogenated starch A). Samples No. 2 to 4 all showed lower increases compared to No. 1. On the other hand, No. 5 (8% hydrolyzed hydrogenated starch A) showed an increase of 113.05%, and No. 6 (16% hydrolyzed hydrogenated starch A) showed an increase of 112.85%, with samples No. 5 and 6 showing slightly higher increases than No. 1.

[0090] Specifically, detergents containing 1%, 2%, and 4% hydrolyzed hydrogenated starch A exhibited lower pressure than detergents without nonionic surfactants. On the other hand, detergents containing 8% and 16% hydrolyzed hydrogenated starch A exhibited higher pressure than detergents without nonionic surfactants. From these results, it became clear that, from the viewpoint of utilizing the pressure-reducing effect of fatty acid alkanolamides, a sugar alcohol content of less than 8% is preferable.

[0091] (2) Evaluation of foam elasticity The foam elasticity was evaluated for samples No. 1 to 6 to determine the rate of increase in elasticity. Specifically, for samples No. 2 to 6, the rate of increase in elasticity was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 1 set to 100%. The results are shown in Figure 15. As shown in Figure 15, the rate of increase in elasticity was 123.95% for No. 2 (hydrolyzed hydrogenated starch A 1%), 123.40% for No. 3 (hydrolyzed hydrogenated starch A 2%), 123.88% for No. 4 (hydrolyzed hydrogenated starch A 4%), 131.68% for No. 5 (hydrolyzed hydrogenated starch A 8%), and 151.76% for No. 6 (hydrolyzed hydrogenated starch A 16%), compared to 100% for No. 1 (no sugar alcohol or nonionic surfactant). All of the rates of increase in elasticity for No. 2 to 6 were significantly higher than for No. 1.

[0092] In other words, detergents containing even a small amount of hydrolyzed hydrogenated starch A showed significantly greater foam elasticity compared to those without it. This result revealed that sugar alcohols can increase foam elasticity in foaming liquid detergents, even in small amounts.

[0093] <Example 9> Investigation of the amount of water-soluble polymer to be blended Detergent No. 1 was prepared as a detergent that does not contain any nonionic surfactants, sugar alcohols, or water-soluble polymers. Detergents No. 2 to 6 were prepared as detergents containing 0-6% galactomannan hydrolysate (water-soluble polymer). Their formulations are shown in Table 14. [Table 14]

[0094] (1) Evaluation of pressure The pressure was evaluated for samples No. 1 to 6, and the pressure increase rate was determined. The results are shown in Figure 16. As shown in Figure 16, the pressure increase rate was 110.40% for No. 1 (no nonionic surfactant, sugar alcohol, or water-soluble polymer), 107.00% for No. 2 (0% galactomannan hydrolysate), 107.00% for No. 3 (1% galactomannan hydrolysate), 106.10% for No. 4 (2% galactomannan hydrolysate), and 108.62% for No. 5 (4% ​​galactomannan hydrolysate). Samples No. 2 to 5 all showed smaller increases compared to No. 1. On the other hand, No. 6 (8% galactomannan hydrolysate) showed an increase of 111.67%, which was slightly larger than No. 1.

[0095] Specifically, detergents containing 1%, 2%, and 4% galactomannan hydrolysate exhibited lower pressure than detergents without nonionic surfactants, and similar pressure to detergents containing nonionic surfactants. On the other hand, detergents containing 6% galactomannan hydrolysate exhibited higher pressure than detergents without nonionic surfactants. From these results, it became clear that, from the perspective of utilizing the pressure-reducing effect of fatty acid alkanolamides, a water-soluble polymer content of less than 6% is preferable.

[0096] (2) Evaluation of foam elasticity The foam elasticity was evaluated for samples No. 1 to 6, and the rate of increase in elasticity was determined. Specifically, for samples No. 2 to 6, the rate of increase in elasticity was calculated as the percentage of the bulk modulus, with the bulk modulus of No. 1 set to 100%. The results are shown in Figure 17. As shown in Figure 17, the rate of increase in elasticity was 123.40% for No. 2 (0% galactomannan hydrolysate), 125.74% for No. 3 (1% galactomannan hydrolysate), 131.82% for No. 4 (2% galactomannan hydrolysate), 149.21% for No. 5 (4% ​​galactomannan hydrolysate), and 161.08% for No. 6 (6% galactomannan hydrolysate), compared to 100% for No. 1 (no nonionic surfactant, sugar alcohol, or water-soluble polymer). Samples No. 2 to 6 all showed significantly higher increases compared to No. 1. Furthermore, samples No. 3 to 6 also showed higher increases compared to No. 2.

[0097] In other words, the foam elasticity of galactomannan hydrolysates tends to increase with increasing concentration, and even at a concentration of 1%, an increase in foam elasticity was observed. From these results, it became clear that in foaming liquid detergents, water-soluble polymers can increase foam elasticity even at small concentrations.

Claims

1. A foam elasticity enhancing composition comprising one or more sugar alcohols selected from (a) to (c) below as an active ingredient, wherein the active ingredient is incorporated into a foaming detergent to impart an effect of increasing the foam elasticity of the foaming detergent; (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1 to 10% by mass of monosaccharides, 6 to 12% by mass of disaccharides, 7 to 12% by mass of trisaccharides, 5 to 10% by mass of tetrasaccharides, and 64 to 82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

2. A method for increasing the foam elasticity of a foaming detergent, comprising the step of incorporating one or more sugar alcohols selected from (a) to (c) below into the foaming detergent; (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1 to 10% by mass of monosaccharides, 6 to 12% by mass of disaccharides, 7 to 12% by mass of trisaccharides, 5 to 10% by mass of tetrasaccharides, and 64 to 82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

3. A foaming detergent containing one or more sugar alcohols selected from (a) to (c) below; (a) Hydrolyzed hydrogenated starch having a sugar composition containing 1 to 10% by mass of monosaccharides, 6 to 12% by mass of disaccharides, 7 to 12% by mass of trisaccharides, 5 to 10% by mass of tetrasaccharides, and 64 to 82% by mass of pentasaccharides or more. (i) Hydrolyzed hydrogenated starch obtained by reducing corn syrup with a dextrose equivalent of 14 or more and 16 or less, (c) Reduced maltose syrup.

4. A method for producing a foaming detergent, comprising the step of incorporating the foam elasticity increasing composition described in claim 1 into the foaming detergent.

Images