Agent for improving the feeling of use of leave-on cosmetics, manufacturing method of leave-on cosmetics, and leave-on cosmetics

Abstract

To provide a technique that readily improves usability of a leave-on cosmetic such as feels of filminess, refreshing, or braking without limiting a degree of freedom in formulation design.SOLUTION: A leave-on cosmetic filminess improver contains one or more reduced starch syrups of the following (a)-(c) as an active ingredient: (a) a reduced starch syrup (middle-sugar reduced starch syrup) having a saccharide composition with monosaccharides of less than 30 mass% and oligosaccharides consisting of five or more monosaccharides of less than 50 mass%, (b) a reduced starch syrup (low-sugar reduced starch syrup) having a saccharide composition with oligosaccharides consisting of five or more monosaccharides of 50 mass% or more, and (c) a reduced starch syrup (middle-low-sugar reduced starch syrup) comprising a reduced starch syrup having a dextrose equivalent of 41 or less.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an agent for improving the usability of leave-on cosmetics, which contains a specified reduced starch syrup as an active ingredient, a method for producing a leave-on cosmetic using the same, and the leave-on cosmetic. [Background technology]

[0002] Leave-on cosmetics include so-called skin care cosmetics such as lotions, lotions, creams, milky lotions, etc. These are products that are primarily intended to replenish moisture to the skin or to maintain moisture in the skin, and generally contain a formula that includes water, chelating agents, pH adjusters, moisturizers, oil-based ingredients, etc.

[0003] Meanwhile, in recent years, in addition to the inherent effect of providing or maintaining moisture, these skin care cosmetics are also required to have a high level of usability, such as a refreshing feeling or film-like feel after use, and a braking feeling during use.

[0004] For example, Patent Document 1 discloses an oil-in-water emulsion composition that contains a large amount of nicotinamide but has reduced stickiness. Patent Document 2 discloses an oil-in-water emulsion cosmetic that is free of a slimy feeling when applied or stickiness when drying, blends well with the skin, provides excellent skin firmness and moisturizing effect, and has good storage stability. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-168105 A [Patent Document 2] JP 2018-203634 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology described in Patent Document 1 improves the stickiness caused by nicotinamide and achieves the effect of imparting firmness and elasticity to the skin by combining a specific amount of phospholipid, a specific amount of a nonionic surfactant with an HLB of 7 or more, a specific amount of polyhydric alcohol, an oil that is liquid at 25° C., and water. In other words, it is necessary to mix specific amounts of multiple types of specific raw materials, which means that the freedom and simplicity of formulation design is lacking.

[0007] Also, the technology described in Patent Document 2 uses a polyhydric alcohol containing glycosyltrehalose in combination with an N-acyl acidic amino acid diester, a liquid fatty acid triglyceride, a nonionic surfactant with a specific HLB, a phospholipid, and water to suppress the slimy feeling when applied and the stickiness when drying, and achieves the effect of imparting skin compatibility, firmness, and moisturizing feeling. That is, as in Patent Document 1, it is necessary to blend multiple types of specific raw materials, so there is a lack of freedom and simplicity in formulation design.

[0008] As described above, even in light of the above patent documents, there is not a sufficient supply of technologies for easily improving the feel of leave-on cosmetics in use. The present invention has been made to solve the above problems, and aims to provide a technology for easily improving the feel of leave-on cosmetics in use, such as the filmy feel, refreshing feel, or braking feel, without restricting the freedom of formulation design. [Means for solving the problem]

[0009] As a result of intensive research, the present inventors have discovered the following (i) to (v): (i) Medium sugar content reduced starch syrup and / or low sugar content reduced starch syrup can improve the film-forming feel of leave-on cosmetics. (ii) Low sugar reduced starch syrup can improve the stickiness of leave-on cosmetics and enhance the refreshing feeling. (iii) Medium sugar content reduced starch syrup and / or low sugar content reduced starch syrup can improve the braking sensation of leave-on cosmetics. (iv) By blending medium sugar content reduced starch syrup and / or low sugar content reduced starch syrup as a raw material, it is possible to produce a leave-on cosmetic product with improved film-forming, refreshing or braking feel. (v) A leave-on cosmetic containing more than 5% by mass and less than 15% by mass of low-saccharified reduced starch syrup has an excellent feel when used, such as less stickiness and a strong refreshing, film-like, and braking sensation. Based on these findings, the following inventions have been completed.

[0010] (1) The film-feel improver of the leave-on cosmetic according to the present invention contains, as an active ingredient, any one or more of the following reduced starch syrups (a) to (c): (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 having a sugar composition of 50% by mass or more of five sugars or more (low sugar content reduced starch syrup); (c) Reduced starch syrup (medium to low sugar content reduced starch syrup) obtained by reducing starch syrup with a dextrose equivalent of 41 or less.

[0011] (2) The freshness enhancer for the leave-on cosmetic according to the present invention contains the following reduced starch syrup (a) and / or (b) as an active ingredient: (a) Reduced starch syrup having a sugar composition of 50% by mass or more of five sugars or more (low sugar content reduced starch syrup); (e) Reduced starch syrup (low sugar content reduced starch syrup) obtained by reducing starch syrup with a dextrose equivalent of 30 or less.

[0012] (3) The braking feel improver of the leave-on cosmetic according to the present invention contains one or more of the following reduced starch syrups (a) to (c) 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 having a sugar composition of 50% by mass or more of five sugars or more (low sugar content reduced starch syrup); (c) Reduced starch syrup (medium to low sugar content reduced starch syrup) obtained by reducing starch syrup with a dextrose equivalent of 41 or less.

[0013] (4) In the agent of the present invention, the sugar composition of the reduced starch syrup (medium to low saccharification reduced starch syrup) of (a), (b) and / or (c) above may be 1 to 10 mass% monosaccharides, 1.4 to 55 mass% disaccharides, 3.9 to 25 mass% trisaccharides, 1 to 10 mass% tetrasaccharides, and 5 to 90.2 mass% pentasaccharides or more.

[0014] (5) In the agent of the present invention, the sugar composition of the reduced starch syrup of (i) and / or (d) above (low-saccharified reduced starch syrup) may be 1 to 10 mass% monosaccharides, 1.4 to 21 mass% disaccharides, 3.9 to 16 mass% trisaccharides, 3.5 to 10 mass% tetrasaccharides, and 51 to 90.2 mass% pentasaccharides or more.

[0015] (6) The film feel improver according to the present invention may be used in an amount of more than 2.5% by mass and not more than 20% by mass, based on 100% by mass of the leave-on cosmetic.

[0016] (7) The freshness enhancer according to the present invention may be used in an amount of more than 5% by mass and less than 15% by mass, based on 100% by mass of the leave-on cosmetic.

[0017] (8) The method for producing a leave-on cosmetic product according to the present invention includes a step of blending the agent of the present invention as a raw material.

[0018] (9) The leave-on cosmetic according to the present invention contains more than 5% by mass and less than 15% by mass of the following reduced starch syrup (i) and / or (d): (a) Reduced starch syrup having a sugar composition of 50% by mass or more of five sugars or more (low sugar content reduced starch syrup); (e) Reduced starch syrup (low sugar content reduced starch syrup) obtained by reducing starch syrup with a dextrose equivalent of 30 or less.

[0019] (10) In the leave-on cosmetic product according to the present invention, the sugar composition of the reduced starch syrup (low sugar content reduced starch syrup) of (i) and / or (d) above may be 1 to 10% by mass of monosaccharides, 1.4 to 21% by mass of disaccharides, 3.9 to 16% by mass of trisaccharides, 3.5 to 10% by mass of tetrasaccharides, and 51 to 90.2% by mass of pentasaccharides or more. Effect of the Invention

[0020] According to the present invention, it is possible to improve the sensation of use of a leave-on cosmetic, such as a refreshing feeling and a filmy feeling after use, and a braking feeling during use. According to the present invention, it is possible to produce a leave-on cosmetic with improved sensation of use, such as a refreshing feeling, a filmy feeling, and a braking feeling, by a simple method of blending a specific reduced starch syrup as a raw material, without restricting the degree of freedom of formulation design. Furthermore, according to the present invention, it is possible to obtain a leave-on cosmetic that is less sticky and has an excellent sensation of use, such as a high refreshing feeling, a high filmy feeling, and a high braking feeling. [Brief description of the drawings]

[0021] [Figure 1] 1 is a table showing the raw materials used in producing the lotion in the examples. [Diagram 2] 1 is a table showing the composition of lotions containing glycerin or various reduced starch syrups. [Diagram 3] 1 is a table showing the results of a sensory evaluation of lotions (Nos. 2 to 6) containing various reduced starch syrups. [Figure 4] This is a radar chart showing the average scores of the sensory evaluation results for No. 2 to 6 (lotions containing various types of reduced starch syrup) for each sample (type of reduced starch syrup). The dotted line indicates the score for No. 1 (lotion containing glycerin), and the solid line indicates the score for No. 2 to 6 (lotions containing various types of reduced starch syrup). [Diagram 5] 1 is a bar graph showing the average scores of the sensory evaluation results for Nos. 2 to 6 (lotions containing various reduced starch syrups) for each evaluation item. [Figure 6] (I) is a table showing the measurement conditions for the reciprocating friction test. The left side of (II) is a photograph showing the test machine for the reciprocating friction test. The right side is a magnified photograph of the sliding surface of the ball indenter. [Figure 7] FIG. 1 shows waveforms indicating the change in frictional resistance and dynamic friction coefficient over time when No. 1 (lotion containing glycerin) or No. 2 (lotion containing highly saccharified reduced starch syrup) is applied to a sliding surface, and the surface of artificial leather after the test. [Figure 8] This is a figure showing the waveform and the surface of artificial leather after testing when No. 3 (lotion containing medium sugar content reduced starch syrup) or No. 4 (lotion containing low sugar content reduced starch syrup (A)) is applied to the sliding surface. [Figure 9] FIG. 1 shows the waveform and the surface of artificial leather after testing when No. 5 (lotion containing low-saccharification reduced starch syrup (B)) or No. 6 (lotion containing low-saccharification reduced starch syrup (C)) is applied to the sliding surface. [Figure 10] 1 is a bar graph showing the maximum dynamic friction coefficient μk(max) over the measurement time (0 seconds to 1200 seconds) when No. 1 (lotion containing glycerin) or Nos. 2 to 6 (lotions containing various reduced starch syrups) are applied to a sliding surface. [Figure 11] 1 is a table showing the composition of lotions produced by varying the amount of low-saccharified reduced starch syrup or glycerin contained therein from 20% to 2.5%. [Figure 12] 1 is a table showing the results of a sensory evaluation of Nos. 1 to 7 (lotions containing varying amounts of low-saccharified reduced starch syrup). [Figure 13] 1 is a bar graph showing the average scores of the sensory evaluation results for Nos. 1 to 7 (lotions containing varying amounts of low-saccharified reduced starch syrup) for each evaluation item. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The present invention will be described in detail below.

[0023] "Leave-on cosmetics" refers to cosmetics that are applied to the application site of the living body (such as the skin or hair) and left on for a relatively long period of time without being washed off. Specific examples of leave-on cosmetics include skin cosmetics (lotion, lotion, cream, milky lotion, sunscreen, sunscreen, etc.), finishing cosmetics (foundation, makeup base, lipstick, eye makeup, etc.), hair cosmetics (hair styling products, hair care products, scalp products, etc.), etc.

[0024] In the present invention, the term "film-like feel" refers to a firm feeling as if a film had formed on the skin, and can also be expressed as a firm feeling. The term "film-like feel enhancer for leave-on cosmetics" refers to an agent that enhances the film-like feel felt by the user during or after use of the cosmetic.

[0025] In the present invention, the term "refreshing feeling" refers to a refreshing, clean, and comfortable feeling, and can also be expressed as a refreshing feeling. The term "agent for enhancing the refreshing feeling of leave-on cosmetics" refers to an agent that enhances the refreshing feeling felt by the user during or after use of the cosmetic.

[0026] In the present invention, "braking sensation" refers to a sensation of high adhesion to the skin. That is, in the case of a leave-on cosmetic with a high braking sensation, when the cosmetic is applied to the skin and spread with the fingers, the skin on the finger side and the skin on the applied side stick to each other, and the user feels as if the sliding of the fingers over the skin is being braked. "An agent for improving the braking sensation of a leave-on cosmetic" refers to an agent that improves the braking sensation felt by the user during or after use of the cosmetic, or when the cosmetic dries.

[0027] In the present invention, "stickiness" refers to an unpleasant sticky feeling. In other words, "stickiness" refers to a relatively strong unpleasant feeling during or after use of the cosmetic product. On the other hand, "non-sticky," "less sticky," and "improved stickiness" refer to the absence or relatively weak unpleasant feeling during or after use of the cosmetic product.

[0028] "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 types of sugar alcohols, including monosaccharide sugar alcohols and polysaccharide (disaccharides, trisaccharides, tetrasaccharides, or pentasaccharides or more) sugar alcohols. Depending on the degree of polymerization, monosaccharides may be expressed as DP1, disaccharides as DP2, trisaccharides as DP3, tetrasaccharides as DP4, and pentasaccharides as DP5.

[0029] Reduced starch syrup is generally classified according to the degree of saccharification into high saccharification reduced starch syrup (reduced starch syrup with 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), medium saccharification reduced starch syrup (reduced starch syrup with a sugar composition of less than 30% by mass of monosaccharides and less than 50% by mass of pentasaccharides or more), and low saccharification reduced starch syrup (reduced starch syrup with a sugar composition of 50% by mass or more of pentasaccharides). That is, the above (A) is one embodiment of medium saccharification reduced starch syrup, and (B) is one embodiment of low saccharification reduced starch syrup.

[0030] 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 taken as 100.

[0031] 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 peaks detected. The HPLC conditions can be set appropriately according to a standard method, and 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)

[0032] "Dextrose equivalent (DE)" is the ratio (percentage) of reducing sugar to the total solid content when the reducing sugar in a sample is measured as glucose, and is used as an index of the degree of saccharification of starch syrup. The maximum value of DE is 100, which means that all of the solid content is glucose, and the smaller the DE, the more oligosaccharides and polysaccharides there are. For example, starch syrup with a DE of 41 or less corresponds to medium or low saccharification starch syrup, and reduced starch syrup obtained by reducing this corresponds to medium or low saccharification reduced starch syrup. In addition, starch syrup with a DE of 30 or less corresponds to low saccharification starch syrup, and reduced starch syrup obtained by reducing this corresponds to low saccharification reduced starch syrup. That is, the above (C) is one embodiment of medium to low saccharification reduced starch syrup, and (D) is one embodiment of low saccharification reduced starch syrup.

[0033] The DE of starch syrup can be measured by the following method. <<DE measurement method>> Accurately weigh out 2.5 g of sample and dissolve in water to make 200 mL. Measure out 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 the titration. The end point is when the color of the solution disappears. Measure the blank value using water and calculate the DE using the following formula 1. TIFF0007654239000001.tif49165

[0034] (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.

[0035] The present invention provides an agent for improving the film-feeling of leave-on cosmetics, an agent for improving the refreshing feeling of leave-on cosmetics, and an agent for improving the braking feeling of leave-on cosmetics. In the present invention, any one or all of these agents may be referred to as "the agent of the present invention".

[0036] The film feeling improver and braking feeling improver of the present invention contain either or both of reduced starch syrups (medium to low sugar content reduced starch syrup) as an active ingredient among reduced starch syrups. Also, the refreshing feeling improver of the present invention contains reduced starch syrups (low sugar content reduced starch syrup) as an active ingredient among reduced starch syrups.

[0037] The present invention also provides a leave-on cosmetic containing more than 5% by mass and less than 15% by mass of low-saccharified reduced starch syrup among reduced starch syrups. The leave-on cosmetic according to the present invention contains more than 5% by mass and less than 15% by mass of low-saccharified reduced starch syrup, thereby achieving the effect of providing an excellent feeling of use, including less stickiness, a high refreshing feeling, a high film feeling, and a high braking feeling.

[0038] In the present invention, the sugar composition of the medium to low saccharification reduced starch syrup may be, in addition to the above (a) or (b), 1 to 10 mass% monosaccharides, 1.4 to 55 mass% disaccharides, 3.9 to 25 mass% trisaccharides, 1 to 10 mass% tetrasaccharides, and 5 to 90.2 mass% pentasaccharides or more.

[0039] In addition, in the present invention, the sugar composition of the low-saccharification reduced starch syrup may be, in addition to the above (i), 1 to 10 mass% monosaccharides, 1.4 to 21 mass% disaccharides, 3.9 to 16 mass% trisaccharides, 3.5 to 10 mass% tetrasaccharides, and 51 to 90.2 mass% pentasaccharides or more.

[0040] In the present invention, the reduced starch syrup may be a commercially available product as is, or may be produced according to a method known to those skilled in the art. Examples of commercially available medium sugar reduced starch syrup include "Sweet OL" and "SE 57" (both from Bussan Food Science). Examples of commercially available low sugar reduced starch syrup include "Sweet NT", "SE 30", "SE 100", "Aquaol #2" (both from Bussan Food Science), "PO-10" and "PO-20" (both from Mitsubishi Corporation Life Science).

[0041] A known method for producing reduced starch syrup is a reduction reaction in which hydrogen is added to starch syrup (raw sugar). The reduction reaction by hydrogen addition may be carried out, for example, by charging a 40-75% by mass aqueous solution of raw sugar together with a reduction catalyst into a high-pressure reactor, setting the hydrogen pressure in the reactor to 4.9-19.6 MPa and the reaction liquid temperature to 70-180°C, while mixing and stirring, until hydrogen absorption is no longer observed. Thereafter, the reduction catalyst is separated, and the 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 high-concentration reduced starch syrup.

[0042] Reduced starch syrup is blended and used as a raw material in the usual process for producing leave-on cosmetics, just like other ingredients (for example, solvents, dispersion media, other polyhydric alcohols, preservatives, chelating agents, pH adjusters, other sugars such as sorbitol, surfactants, colorants, animal and plant extracts, vitamins, inorganic salts, organic salts, solubilizers, disinfectants, moisturizers, antioxidants, humectants, UV absorbers, thickeners, fragrances, cationic polymers, refreshing agents, cooling agents, etc.). In other words, the present invention also provides a method for producing leave-on cosmetics, which includes a step of blending the agent of the present invention as a raw material.

[0043] The method of blending reduced starch syrup as a raw material can be appropriately carried out by a method known to those skilled in the art depending on the type of cosmetic product, the types and blending amounts of other raw ingredients, the desired feel when used, etc. Since reduced starch syrup is a polyhydric alcohol, it can be used to manufacture leave-on cosmetics in the same way as other polyhydric alcohols conventionally blended in cosmetics, such as glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, and pentylene glycol.

[0044] The amount of reduced starch syrup in a leave-on cosmetic can also be appropriately set depending on the type of cosmetic, the type and amount of other raw ingredients, the desired feel when used, etc. For example, from the viewpoint of obtaining a high film-like feel, assuming the total mass of the leave-on cosmetic to be 100% by mass, the lower limit of reduced starch syrup is preferably more than 2.5% by mass, more preferably 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, or 5.0% by mass or more. The upper limit is preferably 20% by mass or less.

[0045] Furthermore, from the viewpoint of obtaining a high refreshing feeling, the lower limit of the reduced starch syrup is preferably more than 5% by mass, more preferably 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, or 7.5% by mass or more, assuming the total mass of the leave-on cosmetic to be 100% by mass. Furthermore, the upper limit is preferably less than 15% by mass, more preferably 14.5% by mass or less, 14% by mass or less, 13.5% by mass or less, 13% by mass or less, or 12.5% ​​by mass or less.

[0046] The leave-on cosmetic product according to the present invention can be produced by a method known to those skilled in the art, except that low sugar reduced starch syrup is blended as an ingredient so that the final concentration is more than 5% by mass and 15% by mass.

[0047] The present invention will be described below based on examples. It should be noted that the technical scope of the present invention is not limited to the characteristics shown in these examples. EXAMPLES

[0048] <Test Method> In the present examples, percentages (%) are by mass unless otherwise specified. Tests were performed according to the following methods unless otherwise specified. (1) Raw materials used A lotion was produced using the raw materials shown in Figure 1 (all commercially available products). The high sugar reduced starch syrup used was product name "SE 600 (Bussan Food Science)", and the medium sugar reduced starch syrup was product name "SE 57 (Bussan Food Science)". For the low sugar reduced starch syrup, three types AC with different sugar compositions were used (A: product name "SE 30 (Bussan Food Science)", B: product name "Aquaall #2 (Bussan Food Science)", C: product name "PO-10 (Mitsubishi Corporation Life Science)"). For the reduced starch syrup, the sugar composition and the DE value of the raw sugar are also shown in Figure 1.

[0049] (2) Manufacturing of lotions The lotion was produced according to the following steps (1)-(4). [1] A preservative was added to 1,3-butylene glycol and dissolved by heating to 80°C. [2] Water was added to [1] and stirred. [3] A polyhydric alcohol (glycerin or reduced starch syrup) was added to [2] and stirred. [4] The chelating agent and pH adjuster were added to [3] in that order and stirred. If necessary, water was added to adjust the total amount, and the production was completed. Hereinafter, lotions containing glycerin may be abbreviated as "No. 1 (glycerin)" and lotions containing various types of reduced starch syrup may be abbreviated as "No. 2 (reduced starch syrup)".

[0050] (3) Sensory evaluation of usability A panel of four people (A, B, C and D) conducted a sensory evaluation of the lotion using the following steps (1)-(5). [1] Wash the inside of your forearms with soap and dry thoroughly. [2] For each sample, apply two drops of lotion to the inside of one forearm, and spread it well with the fingers or palm of the other hand until it dries. [3] Apply two drops of the sample to the inside of the forearm opposite to [2], and spread it well with the fingers or palm of the other hand until it dries. [4] When the lotion penetrates the skin, just before it dries, immediately after it dries, and after it has dried, score each sample according to the evaluation criteria shown in Table 1 and enter the score on the answer sheet. The sample using glycerin is set as the standard (4 points), and the sample is scored on a 7-point scale from 1 to 7 points. [5] Wash the applied area with soap, wipe off any moisture, and allow to dry for approximately 3 minutes until it no longer feels watery, then move on to evaluating the next sample. [Table 1]

[0051] <Example 1> Examination of types of reduced starch syrup Toners containing 10% of glycerin or various reduced starch syrups as polyhydric alcohol were produced and designated Nos. 1 to 6. The compositions of Nos. 1 to 6 are shown in FIG.

[0052] (1) Sensory evaluation A sensory evaluation was conducted on lotions No. 2 to 6, with No. 1 (glycerin) used as the standard. The results of the four panelists' ratings are shown in Figure 3. Figure 4 shows a radar chart of the average ratings for each sample (type of reduced starch syrup). Figure 5 shows a bar graph of the average ratings for each evaluation item.

[0053] As shown in Figures 3 to 5, No. 3 (medium sugar reduced starch syrup), No. 4 (low sugar reduced starch syrup: A), No. 5 (low sugar reduced starch syrup: B) and No. 6 (low sugar reduced starch syrup: C) all had significantly high scores for film-like feel. In other words, it was made clear that lotions containing medium sugar reduced starch syrup or low sugar reduced starch syrup provide a significantly film-like feel. These results demonstrate that medium sugar reduced starch syrup or low sugar reduced starch syrup significantly improves the film-like feel of leave-on cosmetics.

[0054] Furthermore, as shown in Figures 3 to 5, No. 4 (low sugar reduced starch syrup: A), No. 5 (low sugar reduced starch syrup: B) and No. 6 (low sugar reduced starch syrup: C) all had low scores for moisturizing sensation, and significantly high scores for non-stickiness and refreshing sensation. In other words, it was revealed that lotions containing low sugar reduced starch syrup provide a non-sticky, refreshing or light skin feel. These results demonstrate that low sugar reduced starch syrup significantly improves the refreshing or light sensation of leave-on cosmetics.

[0055] Also, as shown in Figures 3 to 5, No. 2 (high saccharification reduced starch syrup), No. 3 (medium saccharification reduced starch syrup), No. 4 (low saccharification reduced starch syrup: A), No. 5 (low saccharification reduced starch syrup: B) and No. 6 (low saccharification reduced starch syrup: C) all had high scores for the brake feeling. In particular, No. 3, No. 4, No. 5 and No. 6 had significantly high scores for the brake feeling. In other words, it was revealed that lotions containing reduced starch syrup caused a brake feeling. In particular, it was revealed that lotions containing medium saccharification reduced starch syrup or low saccharification reduced starch syrup caused a significantly brake feeling. From these results, it was revealed that medium saccharification reduced starch syrup or low saccharification reduced starch syrup significantly improved the brake feeling of leave-on cosmetics.

[0056] Furthermore, as shown in Figures 3 to 5, No. 4 (low-saccharified reduced starch syrup: A), No. 5 (low-saccharified reduced starch syrup: B) and No. 6 (low-saccharified reduced starch syrup: C) all received high preference scores. In other words, it was revealed that lotions containing low-saccharified reduced starch syrup are preferred. These results demonstrate that low-saccharified reduced starch syrup can impart a favorable feel to leave-on cosmetics.

[0057] (2) Friction and wear test A friction and wear test was conducted on the lotions No. 1 to 6. An artificial skin was placed on the sliding surface of a friction and wear tester "Tribogear TYPE: 40 (Shinto Scientific)" and an artificial leather was used as the material for the ball indenter. The lotion was applied to the sliding surface, and a reciprocating friction test was conducted to measure the frictional resistance force (gf) over time and calculate the dynamic friction coefficient. The dynamic friction coefficient was calculated as the average friction coefficient between "the time when the ball indenter is at the start position plus the dynamic friction start exclusion time (100 milliseconds)" and "the time when the ball indenter is at the end position minus the dynamic friction end exclusion time (100 milliseconds)". The measurement conditions and the state of the tester are shown in Figure 6. In addition, the artificial leather surface of the ball indenter after the test was visually observed to confirm the presence or absence of film formation and wear. Waveforms showing the change in frictional resistance force and dynamic friction coefficient over time and the observation results of the artificial leather surface are shown in Figures 7 to 9. In addition, the maximum dynamic friction coefficient μk (max) during the measurement time (0 seconds to 1200 seconds) is shown in Figure 10.

[0058] As shown in Figure 7, the waveform of No. 1 (glycerin) remained constant throughout the test time, and neither film formation nor wear was observed on the artificial leather after measurement. The waveform of No. 2 (highly saccharified reduced starch syrup) showed that the friction resistance and friction coefficient increased over time. Although a small amount of solid matter remained on the artificial leather after measurement, neither film formation nor wear was observed.

[0059] As shown in Figure 8, the waveform of No. 3 (medium sugar content reduced starch syrup) flattened out from around 900 seconds. Additionally, many spike-like waveforms were observed from around 300 seconds to 500 seconds, suggesting the occurrence of shear resistance that leads to wear on the sliding surface. No film formation was observed on the artificial leather after measurement, but wear was observed. The waveform of No. 4 (low sugar content reduced starch syrup: A) flattened out from around 400 seconds. A spike-like waveform was observed around 300 seconds, but some film formation was observed on the artificial leather after measurement, and no wear was observed.

[0060] As shown in Figure 9, the waveforms of No. 5 (low sugar reduced starch syrup: B) and No. 6 (low sugar reduced starch syrup: C) both flattened out from around 400 seconds. Furthermore, no spike-like waveforms were observed in either case, and film formation was observed on the artificial leather after measurement, but no wear was observed.

[0061] From the results of Figures 7 to 9, it became clear that a lotion containing low-glycemic reduced starch syrup can form a film with relatively low friction resistance on the applied surface. In other words, these results support the idea that low-glycemic reduced starch syrup improves the film-like feel of leave-on cosmetics.

[0062] Furthermore, as shown in Figure 10, No. 2 (highly saccharified reduced starch syrup), No. 3 (medium saccharified reduced starch syrup), No. 4 (low saccharified reduced starch syrup: A), No. 5 (low saccharified reduced starch syrup: B) and No. 6 (low saccharified reduced starch syrup: C) all had significantly higher maximum dynamic friction coefficients than glycerin. Here, the braking sensation refers to the "feeling of high adhesion to the skin," so it is believed that there is a positive correlation between the maximum dynamic friction coefficient and the braking sensation. Therefore, these results support the idea that reduced starch syrup improves the braking sensation of leave-on cosmetics.

[0063] Example 2: Examination of the amount of reduced starch syrup The amount of low-saccharified reduced starch syrup (B) was varied from 20% to 2.5% to produce lotions No. 1 to 7. Similarly, the amount of glycerin was varied from 20% to 2.5% to produce lotions No. 8 to 14. The compositions of No. 1 to 14 are shown in Figure 11. Sensory evaluation was carried out for No. 1 to 7, with lotions (No. 8 to 14) containing the same concentration of glycerin as the standard (4 points). The evaluation was carried out in order from the sample with the highest concentration to the sample with the lowest concentration. The results of the evaluation are shown in Figure 12, and the average values ​​of the evaluation results are shown in a bar graph in Figure 13 for each evaluation item.

[0064] As shown in Figure 13, No.1 (low-saccharified reduced starch syrup, 20%) to No.6 (low-saccharified reduced starch syrup, 5%) all had higher film-feel scores than lotions containing the same concentration of glycerin. From these results, it was revealed that the lower limit of the amount of reduced starch syrup to be blended is preferably more than 2.5% from the viewpoint of obtaining a high film-feel, and more preferably 3.0% or more, 3.5% or more, 4.0% or more, 4.5% or more, or 5.0% or more. It was also revealed that the upper limit of the amount of reduced starch syrup to be blended is preferably 20% or less from the viewpoint of obtaining a high film-feel.

[0065] Also, as shown in Figure 13, No. 1 (low sugar reduced starch syrup 20%) to No. 7 (low sugar reduced starch syrup 2.5%) all had higher scores for non-stickiness than lotions containing the same concentration of glycerin. These results demonstrate that reduced starch syrup can improve stickiness in leave-on cosmetics, regardless of the amount of reduced starch syrup used.

[0066] Also, as shown in FIG. 13, No. 3 (low sugar reduced starch syrup 12.5%) to No. 5 (low sugar reduced starch syrup 7.5%) had higher scores for freshness and lower scores for moisturization than lotions containing the same concentration of glycerin. From these results, it was revealed that the lower limit of the amount of reduced starch syrup to be blended is preferably more than 5% from the viewpoint of obtaining a high refreshing feeling, and more preferably 5.5% or more, 6.0% or more, 6.5% or more, 7.0% or more, or 7.5% or more. Also, it was revealed that the upper limit of the amount of reduced starch syrup to be blended is preferably less than 15% from the viewpoint of obtaining a high refreshing feeling, and more preferably 14.5% or less, 14% or less, 13.5% or less, 13% or less, or 12.5% ​​or less.

[0067] Also, as shown in Figure 13, the braking sensation scores for No. 1 (low sugar reduced starch syrup 20%) to No. 7 (low sugar reduced starch syrup 2.5%) were all higher than lotions containing the same concentration of glycerin. These results demonstrate that reduced starch syrup can improve the braking sensation of leave-on cosmetics, regardless of the amount of reduced starch syrup used.

Claims

1. A film-feel improver for a leave-on cosmetic, comprising any one or more of the following reduced starch syrups (a) to (c) as an active ingredient, the agent being used in an amount of more than 2.5% by mass and not more than 20% by mass, when the leave-on cosmetic is taken as 100% by mass: (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 having a sugar composition of 50% by mass or more of five sugars or more; (c) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 41 or less.

2. A braking feel improver for a leave-on cosmetic, comprising any one or more of the following reduced starch syrups (a) to (c) as an active ingredient, the agent being used in an amount of 2.5% by mass or more and 20% by mass or less when the leave-on cosmetic is taken as 100% by mass: (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 having a sugar composition of 50% by mass or more of five sugars or more; (c) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 41 or less.

3. The sugar composition of the reduced starch syrup is 1 to 10% by mass of monosaccharides, 1.4 to 55% by mass of disaccharides, 3.9 to 25% by mass of trisaccharides, 1 to 10% by mass of tetrasaccharides, and 5 to 90.2% by mass of pentose or more sugars. The agent according to claim 1 or 2.

4. A method for improving the film-forming feel of a leave-on cosmetic, comprising the step of blending the agent described in claim 1 as a raw material.

5. A method for improving the braking feeling of a leave-on cosmetic, comprising a step of blending the agent described in claim 2 as a raw material.

6. A method for producing a leave-on cosmetic, comprising a step of blending the agent according to any one of claims 1 to 3 as a raw material.

7. A leave-on cosmetic (excluding emulsion compositions) containing more than 5% by mass and less than 15% by mass of the following reduced starch syrup (a) and / or (b); (A) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars or more; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 30 or less.

8. The leave-on cosmetic according to claim 7 (excluding emulsion compositions), wherein the sugar composition of the reduced starch syrup is 1 to 10% by mass of monosaccharides, 1.4 to 21% by mass of disaccharides, 3.9 to 16% by mass of trisaccharides, 3.5 to 10% by mass of tetrasaccharides, and 51 to 90.2% by mass of pentasaccharides or more.

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