Agent, detergent and method for improving skin feel after washing with surfactant, and method for producing detergent

Abstract

To provide a technology that can easily improve the skin feel after using a detergent without restricting the freedom of formulation design.SOLUTION: Provided is an agent for improving the skin feel after washing with a surfactant, comprising any one or more of the following reduced starch syrups (A) to (D) as active ingredients: (A) reduced starch syrup having a sugar composition of less than 30 mass% of monosaccharides and less than 50 mass% of saccharides with a degree of polymerization of five or more; (B) reduced starch syrup obtained by reducing starch syrup with a dextrose equivalent of more than 35 and less than or equal to 55; (C) reduced starch syrup having a sugar composition of 50 mass% or more of saccharides with a degree of polymerization of five or more; and (D) reduced starch syrup obtained by reducing starch syrup with a dextrose equivalent of 10 or more and 35 or less.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an agent, a cleanser and method for improving the feel on the skin after washing with a surfactant, which are characterized by using a specified reduced starch syrup, and a method for producing the cleanser. [Background technology]

[0002] Body washes, hand soaps, facial cleansers, and other body cleansers contain surfactants as cleansing ingredients. While surfactants are designed to remove dirt, they also remove sebum. Because sebum also plays a role in retaining moisture in the skin, excessive moisture loss after cleansing can cause the skin to feel tight and dry, which can be problematic.

[0003] On the other hand, since cleansers are used for the purpose of removing dirt, it is preferred that they leave the skin feeling refreshed and dry after cleansing. Therefore, cleansers that impart such a dry feeling have been researched and developed. For example, Patent Document 1 discloses a liquid skin cleanser composition that can impart a dry feeling to the skin for a long time by containing (A) an anionic surfactant, (B) a predetermined cationic polymer, (C) a long-chain alkyl group-containing quaternary ammonium salt, and (D) at least one selected from dimethicone and dimethiconol in a predetermined content ratio. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-101128 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in Patent Document 1 requires the four components (A) to (D) to be contained in a predetermined ratio, which limits the flexibility of formulation design and makes it difficult to apply to a wide range of cleansing products. In other words, even in light of the prior art, there is not a sufficient supply of technology that can improve skin feel, such as a tight, dry, or smooth feel, after using a cleanser and that can be applied to a wide range of products. The present invention has been made to solve this problem, and aims to provide a technology that can easily improve skin feel after using a cleanser without limiting the flexibility of formulation design. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that by incorporating low-saccharification reduced starch syrup and / or medium-saccharification reduced starch syrup into a cleanser, it is possible to improve the sensation of tightness, dryness, and smoothness of the skin after cleansing with the cleanser. Based on this finding, the present inventors have completed the following inventions.

[0007] (1) The agent according to the present invention is an agent (skin feel improver) that improves the feel of the skin after washing with a surfactant, and contains one or more of the following reduced starch syrups (A) to (D) as an active ingredient: (A) Reduced starch syrup having a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of 5 or more sugars (medium sugar content reduced starch syrup); (A) Reduced starch syrup (medium sugar content reduced starch syrup) obtained by reducing starch syrup having a dextrose equivalent of more than 35 and less than 55; (C) Reduced starch syrup (low-sugar reduced starch syrup) whose sugar composition is 50% by mass or more of five sugars or more, (d) Reduced starch syrup (low sugar content reduced starch syrup) obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

[0008] (2) The agent according to the present invention may be used to improve the dry feeling of the skin after cleansing (a dry feeling improver).

[0009] (3) The agent according to the present invention may be used to suppress the feeling of tightness and / or dryness of the skin after cleansing (agent for suppressing the feeling of tightness and / or dryness).

[0010] (4) In the present invention, the low-saccharification reduced starch syrup and the medium-saccharification reduced starch syrup may be used in combination with glycerin.

[0011] (5) The cleanser of the present invention is a cleanser for improving the feel of the skin after washing with a surfactant (cleaner for improving skin feel), and contains one or more of the reduced starch syrups (a) to (d) above as an active ingredient.

[0012] (6) The method of the present invention for improving the feel of skin after cleansing with a surfactant comprises the step of blending one or more of the reduced starch syrups (a) to (d) as ingredients in a cleanser.

[0013] (7) The method for producing a surfactant-containing cleanser according to the present invention includes a step of blending one or more of the reduced starch syrups (a) to (d) as ingredients to improve the feel of the skin after cleansing. [Effects of the Invention]

[0014] According to the present invention, a cleanser that improves the feel on the skin after use can be obtained by the simple method of blending a specified reduced starch syrup as a raw material, without restricting the freedom of formulation design. A good feel on the skin after use, such as less tightness or dryness and a smooth feeling, gives satisfaction to the user of the cleanser, and therefore improves its commercial value. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a table showing the materials used in the cleaning products of the examples. [Figure 2](I) is a table showing scores from sensory evaluations of the smooth feeling of the skin after using cleansers (Samples 1 and 2) containing glycerin (Gly) or low-saccharification reduced starch syrup (low HSS). (II) is a bar graph showing the average values ​​for each sample. [Figure 3] (I) is a table showing the scores of sensory evaluations of the smooth feeling of skin after using cleansers (samples 1 to 5) containing low HSS, medium saccharified reduced starch syrup (medium HSS), a glycosyltrehalose-hydrolyzed hydrogenated starch mixture (GH mixture), or low saccharified starch syrup (low SS) and Gly. (II) is a bar graph showing the average values ​​for each sample. [Figure 4] (I) is a table showing scores from sensory evaluations of the smooth feeling of skin after using cleansers containing 0%, 1%, or 5% by mass of low HSS and Gly (Samples 1 to 3). (II) is a bar graph showing the average values ​​for each sample. [Figure 5] (I) is a table showing the scores of sensory evaluations of the feeling of tightness and dryness of skin after using cleansers containing Gly or low HSS (Samples 1 and 2). (II) is a bar graph showing the average values ​​for each sample. [Figure 6] (I) is a table showing the scores of sensory evaluations of the feeling of tightness and dryness of skin after using cleansers containing low HSS, medium HSS, sorbitol (Sor), or PEG-32 and Gly (Samples 1 to 5). (II) is a bar graph showing the average values ​​for each sample. [Figure 7] (I) is a table showing scores from sensory evaluations of the feeling of tightness and dryness of skin after using cleansers containing 0%, 0.5%, or 7% by mass of low HSS and Gly (Samples 1 to 3). (II) is a bar graph showing the average values ​​for each sample. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be described in detail below.

[0017] In the present invention, the term "cleaning agent" refers to a composition used for the purpose of removing dirt, which contains a surfactant and is used in a form that comes into contact with the skin. Specific examples of such cleansing agents include body cleansers (skin cleansers) such as facial cleansers, makeup removers, body shampoos, hand soaps, toilet soaps, bath soaps, and shampoos (hair washes).

[0018] The surfactant contained in the cleanser may be any surfactant available to those skilled in the art, and may be appropriately selected and used depending on the type of product, its intended use, the types and amounts of other raw ingredients, the desired feel when used, etc. That is, any of anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants may be used, and one type may be used alone, or two or more types may be used in combination.

[0019] In the present invention, "improving the feel of the skin" refers to improving the feel of the skin (skin feel) after using the cleanser. More specifically, examples include increasing the dry feeling of the skin (smooth feeling of the skin), reducing the tight feeling (tight feeling of the skin), and reducing the dry feeling (dry feeling of the skin) after using the cleanser. "Improving the feel of the skin" includes making the dry feeling stronger compared to when the present invention is not used, even if the dry feeling is weak, or making the dry feeling weaker compared to when the present invention is not used, even if the dry feeling is strong.

[0020] Whether or not the feel on the skin after use of the cleanser has been improved can be confirmed by sensory evaluation, as shown in the examples described below. If the feel on the skin after use of the cleanser when the present invention is used is compared with that when the present invention is not used, and the former is evaluated as, for example, "less tight feeling," "less dry feeling," or "more smooth feeling," it can be determined that the feel on the skin has been improved by the present invention.

[0021] "Reduced starch syrup" is a type of sugar alcohol obtained by reducing starch syrup. Here, starch syrup is a substance obtained by saccharifying starch with acids or enzymes, and is a mixture of monosaccharides (glucose) and polysaccharides (oligosaccharides, dextrin, etc.). Therefore, reduced starch syrup is also a mixture containing two or more sugar alcohols, including monosaccharide sugar alcohols and polysaccharide sugar alcohols (disaccharides, trisaccharides, tetrasaccharides, or more than pentasaccharides).

[0022] Depending on the degree of saccharification, reduced starch syrup can be divided into (a) high-saccharification reduced starch syrup (a sugar composition of 30-50% by mass of monosaccharides, 20-50% by mass of disaccharides, and 25% by mass or less of trisaccharides or more), (a) medium-saccharification reduced starch syrup (a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of pentasaccharides or more), and (c) low-saccharification reduced starch syrup (a sugar composition of 50% by mass or more of pentasaccharides or more). Of these, the present invention uses the above-mentioned (a) medium-saccharification reduced starch syrup and / or (c) low-saccharification reduced starch syrup as an active ingredient.

[0023] In the present invention, the sugar composition of the medium sugar content reduced starch syrup may be (a) above or may be 2 to 10% by mass of monosaccharides, 15 to 55% by mass of disaccharides, 15 to 65% by mass of trisaccharides, 1 to 15% by mass of tetrasaccharides, and 1 to 38% by mass of pentasaccharides or more.

[0024] In the present invention, the sugar composition of the low-saccharification reduced starch syrup may be (c) above or may be 1 to 10% by mass of monosaccharides, 6 to 21% by mass of disaccharides, 7 to 23% by mass of trisaccharides, 5 to 13% by mass of tetrasaccharides, and 50 to 82% by mass of pentasaccharides or more.

[0025] The "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 when the total mass of sugars is 100.

[0026] The sugar composition can be confirmed using high-performance liquid chromatography (HPLC). That is, reduced starch syrup or starch syrup is subjected to HPLC as a sample to obtain a chromatogram. In the 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 methods, but the following conditions can be exemplified. 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)

[0027] "Dextrose equivalent (DE)" is the percentage of reducing sugars in a sample measured as glucose relative to the total solid content, and is used as an index of the degree of saccharification of starch syrup. The maximum DE value is 100, which means that all of the solid content is glucose, and the lower the DE, the more oligosaccharides and polysaccharides there are.

[0028] That is, the DE of the raw material starch syrup for medium sugar content reduced starch syrup can be exemplified as more than 35, 36 or more, 55 or less, 50 or less, 45 or less, or more than 35 or less than 55.

[0029] Furthermore, the DE of the raw material starch syrup for low sugar content reduced starch syrup can be exemplified as 10 or more, 12 or more, 14 or more, 30 or less, 32 or less, 35 or less, or 10 or more and 35 or less.

[0030] The DE of starch syrup can be measured by the following method. <<DE measurement method>> Accurately weigh 2.5 g of sample and dissolve 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), mix, and then titrate with 1 / 25 mol / L sodium thiosulfate solution (Note 4). When the solution turns slightly yellow near the end of the titration, add 2 drops of starch indicator (Note 5) and continue titrating. The end point is when the solution's color disappears. Determine the blank value using water, and calculate DE using the following equation 1. TIFF0007792152000001.tif49165

[0031] (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 measuring flask, dissolve in a small amount of water, and then add water up to the marked line. (Note 2) 1 / 25 mol / L sodium hydroxide solution: Place 3.2 g of sodium hydroxide in a 2 L measuring flask, dissolve it in a small amount of water, and then add water up to the marked line. (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 measuring flask, dissolve it in a small amount of water, and then add water up to the marked line. (Note 5) Starch indicator: Dissolve 5 g of soluble starch in 500 mL of water, and dissolve 100 g of sodium chloride in this.

[0032] The reduced starch syrup may be commercially available and used as is, or may be produced according to methods known to those skilled in the art. Examples of commercially available medium-sugar reduced starch syrup include "Sweet OL", "SE 57", and "Aquaol #1" (all from Bussan Food Science). Examples of commercially available low-sugar reduced starch syrup include "Aquaol #2", "Sweet NT", "SE 30", "SE 100" (all from Bussan Food Science), "PO-10", and "PO-20" (all from Mitsubishi Corporation Life Science).

[0033] A known method for producing reduced starch syrup is a reduction reaction in which hydrogen is added to the raw material starch syrup (raw material sugar). The reduction reaction by hydrogen addition can be carried out, for example, by charging a 40 to 75% by mass aqueous solution of raw material sugar together with a reduction catalyst into a high-pressure reactor, adjusting the hydrogen pressure in the reactor to 4.9 to 19.6 MPa, and the reaction solution temperature to 70 to 180°C, while mixing and stirring, until hydrogen absorption is no longer observed. The reduction catalyst is then separated, and the resulting mixture is decolorized and desalted by ion exchange resin treatment, and if necessary, activated carbon treatment, etc., and then concentrated to a predetermined concentration to produce a highly concentrated reduced starch syrup.

[0034] "Glycerin" is a trihydric alcohol. As will be shown in the examples below, when glycerin is blended into a cleanser together with medium-sugar reduced starch syrup or low-sugar reduced starch syrup, it improves the smooth feeling of the skin after use of the cleanser, or suppresses the feeling of tightness and dryness. That is, in the present invention, medium-sugar reduced starch syrup or low-sugar reduced starch syrup may be used in combination with glycerin. Glycerin that is commercially available for pharmaceutical, cosmetic, food, industrial, or reagent use can be used.

[0035] The active ingredient can be blended and used as a raw material in the usual process for producing cleansers. That is, the present invention also provides a method for producing a cleanser, which includes a step of blending medium-sugar reduced starch syrup or low-sugar reduced starch syrup as a raw material to improve the feel of skin after cleansing. Furthermore, cleansers blended with the active ingredient can be used to improve the feel of skin after cleansing (as cleansers for improving the feel of skin after cleansing).

[0036] The method of blending active ingredients in producing cleansing agents can be appropriately performed by methods known to those skilled in the art depending on the type of product, its intended use, the types and amounts of other raw ingredients, the desired feel when used, etc. Because medium-sugar reduced starch syrup and low-sugar reduced starch syrup are polyhydric alcohols, they can be used in the production of cleansing agents in the same way as other polyhydric alcohols such as glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, and pentylene glycol.

[0037] In addition to blending medium-sugar reduced starch syrup and low-sugar reduced starch syrup, the cleanser may also contain other ingredients (for example, surfactants, solvents, dispersion media, other polyhydric alcohols, preservatives, chelating agents, pH adjusters, other sugars such as sorbitol, colorants, animal and plant extracts, vitamins, inorganic salts, organic salts, solubilizers, disinfectants, moisturizers, antioxidants, humectants, ultraviolet absorbers, thickeners, fragrances, cationic polymers, refreshing agents, cooling agents, oils, etc.) as long as the features of the present invention are not impaired.

[0038] The amount of medium-sugar reduced starch syrup and low-sugar reduced starch syrup blended in a cleanser can be set as appropriate depending on the type of cleanser, its intended use, the types and amounts of other raw ingredients, the desired feel when used, etc. For example, assuming the total mass of the cleanser is 100% by mass, examples of lower limits for the medium-sugar reduced starch syrup and low-sugar reduced starch syrup (solids content) include 0.05% by mass or more, 0.1% by mass or more, 0.15% by mass or more, 0.2% by mass or more, 0.25% by mass or more, 0.3% by mass or more, 0.35% by mass or more, and 0.4% by mass or more, and examples of upper limits include 30% by mass or less, 28% by mass or less, 26% by mass or less, 24% by mass or less, 22% by mass or less, 20% by mass or less, 18% by mass or less, 16% by mass or less, 14% by mass or less, 12% by mass or less, 10% by mass or less, and 8% by mass or less.

[0039] Alternatively, when used in combination with glycerin, the blending ratio of medium-sugar reduced starch syrup and low-sugar reduced starch syrup is, for example, 10 parts glycerin (solid content) per part medium-sugar reduced starch syrup and low-sugar reduced starch syrup (solid content), with the lower limit being 0.05 or more, 0.1 or more, 0.15 or more, 0.2 or more, 0.25 or more, 0.3 or more, 0.35 or more, 0.4 or more, and the upper limit being 30 or less, 28 or less, 26 or less, 24 or less, 22 or less, 20 or less, 18 or less, 16 or less, 14 or less, 12 or less, 10 or less, 8 or less, and the like.

[0040] The present invention will be described below based on examples, but the technical scope of the present invention is not limited to the features shown in these examples. [Example]

[0041] <Test Method> Unless otherwise specified, the tests were carried out according to the following methods. (1) Material The detergents were prepared using the ingredients shown in Figure 1 (all commercially available products). The sugar composition and DE values ​​of the raw sugars of the hydrolyzed starch and hydrogenated starch hydrolyzate (reduced starch syrup) are shown in Table 1. [Table 1]

[0042] (2) Preparation of cleansing agent Cleansers were prepared according to the following procedures (1) to (4). The formulation of each cleanser is shown in each example. [1] The anionic surfactant was weighed into a container and stirred. [2] The other ingredients were weighed out and placed in a separate container, and heated and stirred at 75-80°C. [3] [1] was added to [2] and cooled with stirring to 35-40°C. [4] After cooling, purified water was added as needed to adjust the total volume, completing the preparation.

[0043] (3) Evaluation of skin feel The sample cleansers were subjected to a sensory evaluation by a panel of three people (A, B, C) following the steps (1)-(5) below. [1] Test areas (approximately 4 cm x 10 cm) were set up on the inside of the left and right forearms. The test areas were pre-washed with a cleanser containing no moisturizers and left to stand for 15 minutes under constant temperature and humidity conditions (approximately 22-23°C, humidity of approximately 50%). [2] The cleanser (sample) of each example was filled into a pump former, and three pumps were extruded for each test area to apply the foam. [3] The foam of the cleanser was placed in the test area and then the test area was washed away with running water for 8 seconds. [4] The water droplets on the test area were lightly wiped off. [5] The test subjects were given a sensory evaluation of the "smooth feeling" or "tight / dry feeling" of the skin immediately after the skin dried (immediately after washing) and 15 minutes later (15 minutes after washing). Scoring was performed on an absolute scale of 1 to 5 points according to the following criteria. The average score of all panelists was calculated for each sample. <Evaluation Criteria> "Smoothness" Weak smoothness: 1 point ⇔ 5 points: Strong smoothness. "Tightness and dryness" Great sense of tightness and dryness: 1 point ⇔ 5 points: Little sense of tightness and dryness.

[0044] Example 1: Smooth feeling: Examination of polyhydric alcohol Using glycerin or low-saccharification reduced starch syrup, cleansers with the formulations shown in Table 2 were prepared according to test method (2). Sample 1 is a cleansing agent containing glycerin, and Sample 2 is a cleansing agent containing low-saccharification reduced starch syrup. Samples 1 and 2 were evaluated for "smoothness" according to test method (3). The scoring results are shown in the table in Figure 2(I), and the average values ​​for each sample are shown in the bar graph in Figure 2(II). [Table 2]

[0045] As shown in Figure 2, the score for dryness was significantly higher for Sample 2 than for Sample 1 immediately after rinsing. 15 minutes after rinsing, both Sample 1 and Sample 2 had high scores. In other words, the cleanser containing low-glycemic reduced starch syrup left skin feeling very dry, not only after some time had passed since rinsing, but also immediately after rinsing. These results demonstrate that adding low-glycemic reduced starch syrup to a cleanser can improve the dryness of skin after rinsing.

[0046] Example 2: Smooth feeling: Examination of the combined use of glycerin and polyhydric alcohol Glycerin and various sugars were used in combination as polyhydric alcohols to prepare cleansers with the formulations shown in Table 3 using test method (2). Sample 1 is a cleansing product containing only glycerin as the polyhydric alcohol, while samples 2 to 5 are cleansing products containing glycerin as well as low-sugar reduced starch syrup, medium-sugar reduced starch syrup, a GH mixture, or low-sugar reduced starch syrup, respectively. Samples 1 to 5 were used to evaluate the "smooth feeling" using test method (3). The scoring results are shown in the table in Figure 3(I), and the average values ​​for each sample are shown in the bar graph in Figure 3(II). [Table 3]

[0047] As shown in Figure 3, immediately after washing, the dryness rating of Sample 4 was lower than that of Sample 1, Sample 5 was equivalent to that of Sample 1, while Samples 2 and 3 were significantly higher than that of Sample 1. After 15 minutes of washing, Sample 4 was lower than that of Sample 1, while Sample 3 was equivalent to that of Sample 1, and Samples 2 and 5 were higher than that of Sample 1.

[0048] That is, the cleanser containing glycerin and low-sugar reduced starch syrup left the skin feeling smoother both immediately after washing and some time after washing. The cleanser containing glycerin and medium-sugar reduced starch syrup left the skin feeling particularly smooth immediately after washing. These results demonstrate that the combination of glycerin and reduced starch syrup in a cleanser can improve the smooth feeling of the skin after washing.

[0049] Example 3: Smoothness: Examination of the amount of reduced starch syrup By varying the amount of low-saccharification reduced starch syrup, cleansers with the formulations shown in Table 4 were prepared using test method (2). Sample 1 is a cleansing product containing no low-saccharification reduced starch syrup (0% by mass), Sample 2 is a cleansing product containing 1.00% by mass of low-saccharification reduced starch syrup, and Sample 3 is a cleansing product containing 5.00% by mass of low-saccharification reduced starch syrup. Samples 1 to 3 were evaluated for "smoothness" using test method (3). The scoring results are shown in the table in Figure 4(I), and the average values ​​for each sample are shown in the bar graph in Figure 4(II). [Table 4]

[0050] As shown in Figure 4, the dryness rating for both Sample 2 and Sample 3 was significantly higher than that for Sample 1 immediately after washing. After 15 washes, Sample 2 was equivalent to Sample 1, and Sample 3 was higher than Sample 1. In other words, all cleansers containing 1 to 5% by mass of low-saccharified reduced starch syrup (10% glycerin to 1 to 5% low-saccharified reduced starch syrup (solids) by mass ratio) improved the dryness of skin immediately after washing and / or after some time had passed since washing. These results demonstrate that reduced starch syrup can improve the dryness of skin after washing, regardless of the amount added.

[0051] Example 4: Tightness and dryness: Examination of polyhydric alcohols Using glycerin or low-saccharification reduced starch syrup as the polyhydric alcohol, cleansers with the formulations shown in Table 5 were prepared according to test method (2). Sample 1 is a cleansing agent containing glycerin, and Sample 2 is a cleansing agent containing low-saccharification reduced starch syrup. Samples 1 and 2 were evaluated for "tightness and dryness" according to test method (3). The scoring results are shown in the table in Figure 5(I), and the average values ​​for each sample are shown in the bar graph in Figure 5(II). [Table 5]

[0052] As shown in Figure 5, the scores for tightness and dryness immediately after rinsing were significantly higher for Sample 2 than for Sample 1. 15 minutes after rinsing, Sample 1 had a higher score than Sample 2. In other words, the cleanser containing low-glycemic reduced starch syrup caused less tightness and dryness immediately after rinsing. These results demonstrate that adding low-glycemic reduced starch syrup to a cleanser can reduce the tightness and dryness of the skin immediately after rinsing.

[0053] Example 5: Tightness and dryness: Examination of the combined use of glycerin and polyhydric alcohol Cleansers with the formulations shown in Table 6 were prepared using test method (2) with glycerin and various sugars as polyhydric alcohols. Sample 1 is a cleansing agent containing only glycerin as the polyhydric alcohol, while samples 2 to 5 are cleansing agents containing glycerin plus low-sugar reduced starch syrup, medium-sugar reduced starch syrup, sorbitol, or PEG-32, respectively. Samples 1 to 5 were evaluated for "tightness and dryness" using test method (3). The scoring results are shown in the table in Figure 6(I), and the average values ​​for each sample are shown in the bar graph in Figure 6(II). [Table 6]

[0054] As shown in Figure 6, the ratings for tightness and dryness immediately after washing were lower for Samples 4 and 5 than for Sample 1, while Samples 2 and 3 were significantly higher than for Sample 1. After 15 minutes of washing, Sample 5 was lower than Sample 1, while Samples 3 and 4 were equivalent to Sample 1, and Sample 2 was significantly higher than Sample 1.

[0055] In other words, a cleanser containing glycerin and low-sugar reduced starch syrup reduced the feeling of tightness and dryness of the skin both immediately after cleansing and some time after cleansing. A cleanser containing glycerin and medium-sugar reduced starch syrup reduced the feeling of tightness and dryness immediately after cleansing in particular. These results demonstrate that the combination of glycerin and reduced starch syrup in a cleanser can reduce the feeling of tightness and dryness of the skin after cleansing.

[0056] Example 6: Tightness and dryness: Examination of the amount of reduced starch syrup By varying the amount of low-saccharification reduced starch syrup, cleansers with the formulations shown in Table 7 were prepared using test method (2). Sample 1 is a cleansing product containing no low-saccharification reduced starch syrup (0 mass%), Sample 2 is a cleansing product containing 0.50 mass% low-saccharification reduced starch syrup, and Sample 3 is a cleansing product containing 7.00 mass% low-saccharification reduced starch syrup. Samples 1 to 3 were evaluated for "tightness and dryness" using test method (3). The scoring results are shown in the table in Figure 7(I), and the average values ​​for each sample are shown in the bar graph in Figure 7(II). [Table 7]

[0057] As shown in Figure 7, the scores for tightness and dryness were higher for Samples 2 and 3 than for Sample 1, both immediately after washing and after 15 washes. In particular, Samples 2 and 3 were significantly higher after 15 washes. In other words, all cleansers containing 0.5 to 7% by mass of low-glycerol reduced starch syrup (10% glycerin to 0.5 to 7% low-glycerol reduced starch syrup (solids) by mass ratio) reduced skin tightness and dryness immediately after washing and some time after washing. These results demonstrate that reduced starch syrup, regardless of the amount used, can suppress skin tightness and dryness after washing.

Claims

1. An agent for improving the smooth feeling of skin after cleansing with a surfactant, comprising any one or more of the following reduced starch syrups (A) to (D) as an active ingredient, the active ingredient being blended with a surfactant-containing cleanser to impart to the cleanser an effect of improving the smooth feeling of skin after cleansing with a surfactant; (A) reduced starch syrup having a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of 5 or more sugars; (A) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and less than 55; (C) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

2. An agent for suppressing a feeling of tightness and / or dryness of the skin after cleansing with a surfactant, the agent comprising any one or more of the following reduced starch syrups (A) to (D) as an active ingredient, the active ingredient being blended with a surfactant-containing cleanser to impart to the cleanser an effect of suppressing a feeling of tightness and / or dryness of the skin after cleansing with a surfactant; (A) reduced starch syrup having a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of 5 or more sugars; (A) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and less than 55; (C) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

3. The agent according to claim 1 or 2, characterized in that the reduced starch syrup and glycerin are used in combination as the active ingredients.

4. A method for improving the smooth feeling of skin after washing with a surfactant-containing cleanser, the method comprising the step of blending one or more of the following reduced starch syrups (a) to (d) into the cleanser as an ingredient: (A) reduced starch syrup having a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of 5 or more sugars; (A) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and less than 55; (C) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

5. The method described in claim 4, which includes a step of blending the reduced starch syrup and glycerin as ingredients in a cleanser.

6. A method for suppressing the feeling of tightness and / or dryness of the skin after cleansing with a surfactant-containing cleanser, the method comprising the step of blending one or more of the following reduced starch syrups (a) to (d) into the cleanser as an ingredient: (A) reduced starch syrup having a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of 5 or more sugars; (A) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and less than 55; (C) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

7. The method described in claim 6, which includes a step of blending the reduced starch syrup and glycerin as ingredients in a cleanser.

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