Agent, cosmetic and method for improving hair smoothness, and method for producing hair cosmetics

Abstract

To provide a technology that easily improves hair smoothness without restricting the freedom of formulation design.SOLUTION: Provided is a hair smoothness enhancer comprising the following reduced starch syrup (A) and / or (B) and cationic cellulose as active ingredients: (A) reduced starch syrup having a sugar composition containing 50 mass% or more of saccharides with a degree of polymerization of five or more; and (B) reduced starch syrup obtained by reducing starch syrup with a dextrose equivalent of 10 or more and 35 or less. The hair cosmetic composition of the present invention, when used daily, for example, as a hair styling product, hair care product, or hair wash, can continuously maintain and improve hair smoothness, improving tangles, snagging, and difficulty in combing and running fingers through hair, thereby contributing to reduced hair damage and stress associated with hair care.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an agent, cosmetic and method for improving hair smoothness, which contain a specified reduced starch syrup and cationized cellulose as active ingredients, as well as a method for producing hair cosmetics using the same. [Background technology]

[0002] Tangled hair, snagging, and difficulty combing or running your fingers through it are some of the most common hair problems. There are several causes for this, including cuticle damage (peeling, etc.), hair type, and ingredients in hair cosmetics (shampoo, styling products, etc.). Tangled hair does not necessarily mean it's damaged, but forcing it out can cause breakage and split ends, worsening hair damage. Furthermore, hair that's difficult to comb or run your fingers through can be stressful in daily hair care.

[0003] Therefore, research and development has been conducted into technologies for improving hair smoothness, and many hair care products, such as treatments, that claim to make hair easier to run your fingers through are available on the market. Patent Document 1 also discloses a hair wash composition containing a polymeric substance containing a cationic group and an anionic surfactant, which exhibits a predetermined ratio of change in scattering intensity when diluted with water, resulting in excellent finger-combability during rinsing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-319140 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in Patent Document 1 is directed to hair cleansing compositions such as shampoos, and has the problem that it is difficult to apply to other hair care products such as treatments and hair dyes. That is, even in view of the prior art, there is not a sufficient supply of technology that can improve hair smoothness and can be applied to a wide range of products. The present invention has been made to solve the problem, and aims to provide a technology that can easily improve hair smoothness without restricting the freedom of formulation design. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that the combined use of low-saccharification reduced starch syrup and / or medium-saccharification reduced starch syrup with cationic cellulose can significantly improve hair smoothness. Based on this finding, the present inventors have completed the following inventions.

[0007] (1) A first aspect of the hair smoothness improving agent according to the present invention comprises the following reduced starch syrup (A) and / or (B) and cationized cellulose as active ingredients: (A) Reduced starch syrup having a sugar composition of 50% by mass or more of five sugars or more (low-sugar reduced starch syrup); (i) Reduced starch syrup (low sugar content reduced starch syrup) obtained by reducing starch syrup with a dextrose equivalent of 10 to 35.

[0008] (2) A second embodiment of the hair smoothness improving agent according to the present invention comprises the following reduced starch syrup (c) and / or (d) and cationized cellulose as active ingredients: (C) 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); (e) Reduced starch syrup (medium sugar content reduced starch syrup) obtained by reducing starch syrup having a dextrose equivalent of more than 35 and not more than 55.

[0009] (3) A first aspect of the cosmetic composition for improving hair smoothness according to the present invention contains the reduced starch syrup of (a) and / or (b) above and cationized cellulose as active ingredients.

[0010] (4) A second embodiment of the cosmetic composition for improving hair smoothness according to the present invention contains the reduced starch syrup of (c) and / or (d) above and cationized cellulose as active ingredients.

[0011] (5) A first aspect of the method for improving hair smoothness according to the present invention includes a step of blending the reduced starch syrup of (a) and / or (b) and cationized cellulose as ingredients in a hair cosmetic.

[0012] (6) A second aspect of the method for improving hair smoothness according to the present invention includes a step of blending the reduced starch syrup of (c) and / or (d) and cationized cellulose as ingredients in a hair cosmetic.

[0013] (7) A first aspect of the method for producing hair cosmetics according to the present invention includes a step of blending the reduced starch syrup of (a) and / or (b) and cationized cellulose as raw materials in order to improve hair smoothness.

[0014] (8) A second aspect of the method for producing hair cosmetics according to the present invention includes a step of blending the reduced starch syrup of (c) and / or (d) and cationized cellulose as raw materials in order to improve hair smoothness. [Effects of the Invention]

[0015] According to the present invention, a hair cosmetic that can improve hair smoothness can be obtained by the simple method of blending low-sugar reduced starch syrup / medium-sugar reduced starch syrup and cationic cellulose as raw materials, without restricting the freedom of formulation design. Daily use of this hair cosmetic, for example, as a hair styling product, hair care product, or hair wash, can continuously maintain and improve hair smoothness, improving hair tangles, snagging, and difficulty in combing or running fingers through the hair, thereby contributing to reducing hair damage and stress associated with hair care. Smooth hair that is less likely to snag or tangle, or that is easy to comb or run fingers through, provides satisfaction to the user of the hair cosmetic and can therefore improve its commercial value. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a table showing the materials used in the shampoos of the examples. [Figure 2] This is a waveform showing the frictional force when combing hair washed with shampoos (samples 1 to 4) containing or not containing low-saccharified reduced starch syrup (low HSS) and polyquaternium-10 (PQ). [Figure 3] 1 is a bar graph showing the maximum frictional force when combing hair washed with shampoos (samples 1 to 4) containing or not containing low HSS and PQ. [Figure 4] This is a waveform showing the frictional force (second measurement) when combing hair washed with shampoos (samples 1 to 3) containing medium-saccharified reduced starch syrup (medium HSS), low HSS, or a glycosyltrehalose-hydrolyzed hydrogenated starch mixture (GH mixture) and PQ. [Figure 5] 1 is a bar graph showing the maximum friction force (average of five measurements) when combing hair washed with shampoo containing medium HSS, low HSS, or a GH mixture and PQ (samples 1 to 3). [Figure 6] 1 is a bar graph showing the maximum friction force (average of five measurements) when combing hair washed with shampoos (samples 1 to 3) containing 0.98 mass%, 10.01 mass%, or 20.02 mass% low HSS and PQ. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be described in detail below.

[0018] "Improving hair smoothness" refers to increasing or strengthening the smoothness of the hair surface. More specifically, examples include reducing the degree of hair tangling, reducing the amount of hair that gets caught when fingers or a comb are run through the hair (making it easier to run fingers or comb through), or making hair feel smoother and less rough to the touch when hands or fingers are run through the hair. "Improving hair smoothness" includes cases where even if hair gets tangled, caught, or rough, the degree of this is less than when the present invention is not used.

[0019] The degree of hair smoothness can be evaluated by measuring the frictional force when a comb is run through the hair, as shown in the examples described below. Since the greater the frictional force, the less smooth (less smooth) the hair is, the frictional force can be compared between when the present invention is used and when the present invention is not used. If the frictional force is smaller in the former case, it can be evaluated that the present invention has improved hair smoothness.

[0020] In addition, the coefficient of friction of hair is generally higher in a wet state than in a dry state. In the examples described below, the frictional force is measured on wet hair, and the active ingredient of the present invention has been confirmed to have a frictional force reducing effect in the measurement. In other words, since the active ingredient of the present invention is effective in a wet state where the frictional force is thought to be higher, it can be said that it can improve the smoothness of hair in both wet and dry states.

[0021] "Hair cosmetics" refers to cosmetics intended for application to the scalp or hair. Specific examples of hair cosmetics include hair styling products such as styling agents, hair creams, hair mists, hair waters, hair foams, and hair gels; hair care products such as hair lotions, hair treatments, hair conditioners, hair masks, and hair packs; scalp products such as scalp treatments; hair coloring products such as color treatments, color rinses, hair manicures, and hair dyes; hair washing products such as shampoos; and hair rinses.

[0022] "Reduced starch syrup" is a type of sugar alcohol obtained by reducing starch syrup, and is also called hydrogenated starch hydrolysate, hydrogenated starch hydrolysate, or maltooligosaccharide alcohol. Here, starch syrup is a substance obtained by saccharifying starch with acids or enzymes, and is a mixture of monosaccharides (glucose) and polysaccharides (oligosaccharides, dextrins, etc.). Therefore, reduced starch syrup is also a mixture containing two or more sugar alcohols, including monosaccharide sugar alcohols and polysaccharide (disaccharides, trisaccharides, tetrasaccharides, or more than pentasaccharide) sugar alcohols.

[0023] Depending on the degree of saccharification, reduced starch syrup can be divided into (c) 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), (d) 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 (e) low-saccharification reduced starch syrup (a sugar composition of 50% by mass or more of pentasaccharides). Of these, the present invention uses the low-saccharification reduced starch syrup of (e) and / or the medium-saccharification reduced starch syrup of (e) as an active ingredient.

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

[0025] In addition to the above (c), the sugar composition of medium-sugar reduced starch syrup can also be exemplified by (f) a sugar composition of 2 to 10 mass% monosaccharides, 15 to 55 mass% disaccharides, 15 to 65 mass% trisaccharides, 1 to 15 mass% tetrasaccharides, and 1 to 38 mass% pentasaccharides or more.

[0026] 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.

[0027] 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)

[0028] "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.

[0029] That is, 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] Furthermore, examples of the DE of the raw material starch syrup for medium sugar content reduced starch syrup include (d) more than 35, 37 or more, 48 or less, 50 or less, and 55 or less.

[0031] 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. TIFF2025152331000002.tif49165

[0032] (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.

[0033] The reduced starch syrup may be commercially available as it is, or may be produced according to a method known to those skilled in the art. 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", "PO-20" (all from Mitsubishi Corporation Life Sciences), etc., and examples of commercially available medium-sugar reduced starch syrup include "Aquaol #1", "Sweet OL", "SE 57" (all from Bussan Food Science), etc.

[0034] 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.

[0035] "Cationized cellulose" refers to a cellulose derivative having a cationic group. Examples of the cellulose main chain include hydroxypropyl cellulose, hydroxyethyl cellulose, and hydroxypropyl ethyl cellulose. Examples of the cationic group include glycidyl trimethylammonium chloride and 3-chloro-2-hydroxypropyl trimethylammonium chloride. Specific examples of cationic cellulose include polyquaternium-10 and hydroxyethyl cellulose dimethyl diallyl ammonium chloride (polyquaternium-4).

[0036] The molecular weight of the cationized cellulose and the rate of introduction of cationic groups (degree of cationization) are not particularly limited and can be appropriately set depending on the type and use of the product to which the present invention is applied, the types and amounts of other raw materials, the desired feel when used, etc. Specific molecular weights can be exemplified as 150,000 to 1,500,000. The degree of cationization can be exemplified as about 0.01 to 1.0, about 0.05 to 0.5, 0.22, 0.35, 0.45, etc. per anhydrous glucose. The cationized cellulose can be used alone or in combination of two or more types.

[0037] The cationized cellulose may also be commercially available and used as is, or may be produced according to a method known to those skilled in the art. Examples of commercially available polyquaternium-10 include "Catinal LC-200" (Toho Chemical Industry), "UCARE (registered trademark) Polymer JR-400", "UCARE (registered trademark) Polymer JR-125", "UCARE (registered trademark) Polymer LR-30M" (all Dow Chemical Japan), "CELQUAT SC230M", "CELQUAT SC240C" (all Nouryon Japan), "Condicare PQ10-4" (Innospec Performance Chemicals Europe Limited), "Dekaquat 400" (IMCD Benelux BV), DOCQUAT 10", "DOCQUATR 10V" (all DOC Japan), "MICONIUM PQ10-J3000", "MICONIUM PQ10-J400" (all Miwon Commercial Co., Ltd.), and "Sensomer (registered trademark) 10M polymer" (Lubrizol Japan).

[0038] The active ingredient can be blended and used as a raw material in the usual process for producing cosmetics. That is, the present invention also provides a method for producing hair cosmetics, which includes a step of blending low-saccharification reduced starch syrup / medium-saccharification reduced starch syrup and cationic cellulose as raw materials to improve hair smoothness.

[0039] Furthermore, cosmetics containing the active ingredients can be used to improve hair smoothness. That is, the present invention also provides a method for improving hair smoothness when using hair cosmetics, which comprises a step of blending low-saccharification reduced starch syrup / medium-saccharification reduced starch syrup and cationic cellulose as raw materials to improve hair smoothness.

[0040] The method according to the present invention may include other steps as long as the features of the present invention are not impaired, such as a step of measuring raw materials, a mixing step, a stirring step, a filtering step, a pasteurizing / sterilizing step, a cooling step, a heating step, a step of applying the hair cosmetic to hair, a packaging step, etc.

[0041] The method of blending active ingredients when producing cosmetics can be carried out by any method 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 reduced starch syrup is a polyhydric alcohol, it can be used in the production of cosmetics in the same way as other polyhydric alcohols that are conventionally blended, such as glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, and pentylene glycol. Because cationized cellulose is a cationic polymer, it can be used in the production of cosmetics in the same way as other cationic polymers.

[0042] In addition to blending reduced starch syrup and cationized cellulose, the cosmetic 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.

[0043] The amount of reduced starch syrup blended in a cosmetic can be appropriately set depending on the type of cosmetic, its intended use, the types and blending amounts of other raw ingredients, the desired feel when used, etc. For example, assuming the total mass of the cosmetic is 100% by mass, examples of lower limits for reduced starch syrup (solid content) include 0.05% by mass or more, 0.06% by mass or more, 0.07% by mass or more, 0.08% by mass or more, and 0.09% by mass or more, while examples of upper limits include 30% by mass or less, 29% by mass or less, 28% by mass or less, 27% by mass or less, 26% by mass or less, 25% by mass or less, 24% by mass or less, 23% by mass or less, 22% by mass or less, 21% by mass or less, and 28% by mass or less.

[0044] The amount of cationized cellulose in a cosmetic can be appropriately set depending on the type of cosmetic, 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 cosmetic is 100% by mass, examples of the lower limit of the cationized cellulose (solid content) include 0.003% by mass or more, 0.006% by mass or more, 0.008% by mass or more, 0.01% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.07% by mass or more, 0.1% by mass or more, 0.2% by mass or more, and 0.3% by mass or more, and examples of the upper limit include 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, and 1% by mass or less.

[0045] The blending ratio of reduced starch syrup and cationized cellulose in a cosmetic can also be appropriately set depending on the type of cosmetic, its intended use, the types and blending amounts of other raw ingredients, the desired feel when used, etc. For example, the ratio can be 100 to 10,000 low-saccharified reduced starch syrup (solid content, mass ratio) per 100 of cationized cellulose.

[0046] 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]

[0047] <Test Method> Unless otherwise specified, the tests were carried out according to the following methods. (1) Material The shampoo was made using the ingredients shown in Figure 1 (all commercially available products). The sugar composition and DE value of the raw sugar of the hydrogenated starch hydrolysate (reduced starch syrup) are shown in Table 1. Wavy hair bundles (product number BS-B4-3, Beaulux Co., Ltd.) (approximately 3 g per bundle, approximately 30 cm long) were used. [Table 1]

[0048] (2) Making shampoo Shampoos were prepared according to the following procedures (1) to (4). The shampoo formulations are shown in each example. [1] PQ was weighed into a container, purified water was added to make a 2% by mass aqueous solution, and the mixture was stirred at room temperature. [2] All ingredients other than PQ and the pH adjuster (citric acid or sodium citrate) were weighed into a separate container and heated to 75°C to 80°C with stirring. [3] [2] was cooled with stirring to 35°C to 40°C, and then [1] was added thereto so that the final concentration of PQ in the shampoo was 0.4% by mass, followed by stirring. [4] After cooling [3] to room temperature, a pH adjuster was added to adjust the pH to around 6.0, and purified water was added as needed to adjust the total amount, completing the preparation.

[0049] (3) Measurement of friction force The friction force was measured according to the following procedures (1)-(7). [1] The hair was pre-washed using 0.1 mL per strand of an aqueous solution containing 10% by mass of sodium laureth sulfate in terms of solid content. [2] 300 μL of the shampoo shown in each example was applied to each strand of hair, and the hair was massaged to create a lather. The hair was then massaged and washed with an appropriate amount of water in the shower, and rinsed. [3] Wet hair was hung vertically with the roots of the strands facing up. [4] To equalize the condition of the hair bundles between samples before measurement, a coarse-toothed comb (2 mm wide) was passed through the hair bundles twice from the root to the tip. [5] A fine-toothed comb (1 mm wide) for measurement was attached to a special jig attached to the tip of the probe of a friction measuring instrument (Handy Rub Tester TL701 (Trinity Lab Co., Ltd.)). [6] The comb was passed through the hair bundle by manually moving the probe from the root to the tip (top to bottom), and the frictional force was measured. The speed of the probe movement was approximately 5 cm / sec. [7] Measurements in [6] were performed 2 to 6 times per sample. The first measurement was excluded from the analysis.

[0050] Example 1: Effect of combined use of reduced starch syrup and cationized cellulose Using low-sugar reduced starch syrup as the polyhydric alcohol and sugar, the shampoos shown in Table 2 were prepared according to test method (2). Sample 1 is a shampoo containing neither low-sugar reduced starch syrup nor polyquaternium-10, sample 2 is a shampoo containing both low-sugar reduced starch syrup and polyquaternium-10, sample 3 is a shampoo containing low-sugar reduced starch syrup but not polyquaternium-10, and sample 4 is a shampoo containing only polyquaternium-10 without low-sugar reduced starch syrup. [Table 2]

[0051] The frictional force was measured by test method (3) using samples 1 to 4. The waveform of the frictional force in the second measurement is shown in Figure 2, and a bar graph of the maximum frictional force in the second measurement is shown in Figure 3.

[0052] As shown in Figure 2, the magnitude of the friction force was in the following order: Sample 1 > Sample 3 > Sample 4 > Sample 2. Also, as shown in Figure 3, the maximum friction force of Sample 2 was significantly reduced compared to Sample 1. The decrease was 941.7 (1318.2 - 376.5), which was larger than the sum of the decrease in Sample 3 (1318.2 - 1209.9 = 108.3) and the decrease in Sample 4 (1318.2 - 625.4 = 692.8) (108.3 + 692.8 = 801.1).

[0053] In other words, a shampoo containing both low-saccharification reduced starch syrup and polyquaternium-10 exhibited a synergistic effect in reducing frictional force compared to when neither was added, or when only one of them was added. These results demonstrate that the combined use of reduced starch syrup and cationized cellulose in hair cosmetics can significantly improve hair smoothness.

[0054] Example 2: Examination of polyhydric alcohols and sugars Using various polyhydric alcohols and sugars, shampoos shown in Table 3 were prepared according to test method (2). Sample 1 is a shampoo containing medium-sugar reduced starch syrup, sample 2 is a shampoo containing low-sugar reduced starch syrup, and sample 3 is a shampoo containing a glycosyl trehalose-hydrolyzed hydrogenated starch mixture. Frictional force was measured using shampoos 1 to 3 according to test method (3), and the maximum frictional force measured the second to sixth times was averaged for each sample, a total of five times. The waveforms of the frictional force for each sample in the second measurement are shown in Figure 4, and the average maximum frictional force is shown in Figure 5. [Table 3]

[0055] As shown in Figure 4, the frictional force of Samples 1 and 2 was significantly lower than that of Sample 3. Furthermore, as shown in Figure 5, the average maximum frictional force of Samples 1 and 2 was also significantly lower than that of Sample 3, with Sample 2 being the smallest. In other words, when medium- or low-saccharification reduced starch syrup was used as the polyhydric alcohol and sugar in combination with Polyquaternium-10, the frictional force was significantly lower than when a glycosyl trehalose and hydrogenated starch hydrolysate mixture was used. These results demonstrate that, in order to achieve a high smoothness-enhancing effect in hair cosmetics, medium- or low-saccharification reduced starch syrup is preferred as the polyhydric alcohol and sugar in combination with cationic cellulose.

[0056] Example 3: Examination of the amount of reduced starch syrup used The shampoos shown in Table 4 were prepared using test method (2) by varying the amount of low-saccharified reduced starch syrup blended. Sample 1 is a shampoo blended with 0.98% by mass of low-saccharified reduced starch syrup, Sample 2 with 10.01% by mass, and Sample 3 with 20.02% by mass. [Table 4]

[0057] (1) Maximum frictional force The frictional forces of the shampoos of Samples 1 to 3 were measured according to Test Method (3), and the average of the maximum frictional forces measured 2 to 6 times for each sample was calculated. The results are shown in Figure 6. For reference, Figure 6 also shows the measured value (average) of Sample 3 of Example 2.

[0058] As shown in Figure 6, the maximum frictional force of all Samples 1 to 3 was significantly smaller than that of Sample 3 of Example 2 (which used a combination of GH mixture and PQ). That is, all shampoos containing 0.98 to 20.02 mass% low-saccharified reduced starch syrup (a mass ratio of 269 to 5500 low-saccharified reduced starch syrup to 100 polyquaternium-10) had significantly smaller frictional forces. These results demonstrate that reduced starch syrup, regardless of its amount, can be used in combination with cationic cellulose to achieve a significant effect of improving smoothness in hair cosmetics.

[0059] (2) Sensory test Using shampoo samples 1 to 3, hair was washed and hung up according to steps (1) to (4) of test method (3). One analytical panelist ran his fingers through the wet hair from the roots to the ends, and sensory evaluation was performed on the "roughness of the hair" and "ease of running fingers through the hair." Evaluation was performed using an absolute rating scale of four levels: ◎, ○, △, ×, according to the following criteria. The results are shown in Table 5. <Evaluation Criteria> "Roughness of hair" ◎: Not felt at all, ○: Not felt very much, △: Felt, ×: Felt quite a bit. "Ease of running your fingers through hair" ◎: Very good, ○: Good, △: Fairly good, ×: Poor. [Table 5]

[0060] As shown in Table 5, "hair roughness" was either barely noticeable or not noticeable at all for Samples 1 to 3. Furthermore, "hair runnability" was either good or very good for Samples 1 to 3. That is, for all shampoos containing 0.98 to 20.02 mass% low-saccharified reduced starch syrup (269 to 5500 mass% low-saccharified reduced starch syrup to 100% polyquaternium-10), hair washed with the shampoos had little roughness and was easy to run your fingers through. These results demonstrate that reduced starch syrup, regardless of the amount used, can exert a hair-smoothing effect in hair cosmetics when used in combination with cationic cellulose.

Claims

1. A hair smoothness improver comprising the following reduced starch syrup (a) and / or (b) and cationized cellulose as active ingredients: (A) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (i) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

2. A hair smoothness improver comprising the following reduced starch syrup (C) and / or (D) and cationized cellulose as active ingredients: (C) 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; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and not more than 55.

3. A cosmetic composition for improving hair smoothness, comprising the following reduced starch syrup (a) and / or (b) and cationized cellulose as active ingredients: (A) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (i) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

4. A cosmetic composition for improving hair smoothness, comprising the following reduced starch syrup (C) and / or (D) and cationized cellulose as active ingredients: (C) 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; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and not more than 55.

5. A method for improving hair smoothness, comprising a step of blending the following reduced starch syrup (a) and / or (b) and cationized cellulose as raw materials into a hair cosmetic; (A) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (i) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

6. A method for improving hair smoothness, comprising a step of blending the following reduced starch syrup (c) and / or (d) and cationized cellulose as raw materials into a hair cosmetic; (C) 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; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and not more than 55.

7. A method for producing a hair cosmetic, comprising a step of blending the following reduced starch syrup (a) and / or (b) and cationized cellulose as raw materials in order to improve hair smoothness; (A) reduced starch syrup having a sugar composition of 50% by mass or more of five sugars; (i) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of 10 to 35.

8. A method for producing a hair cosmetic, comprising a step of blending the following reduced starch syrup (C) and / or (D) and cationized cellulose as raw materials in order to improve hair smoothness; (C) 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; (e) Reduced starch syrup obtained by reducing starch syrup having a dextrose equivalent of more than 35 and not more than 55.

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