Thickening composition and cosmetic thereof

Abstract

The present invention relates to a thickening composition containing glucomannan and a cosmetic product thereof, and provides a thickening composition and cosmetic product thereof that have a high thickening effect even at low concentrations and further suppress changes in viscosity over time during storage. [Solution] A thickening composition characterized by containing glucomannan, and further comprising a cosmetic containing the said thickening composition.

Description

Technical Field

[0001] The present invention relates to a thickening composition containing glucomannan and a cosmetic thereof, and more particularly, to a thickening composition having a high thickening effect even at a low concentration and having a small viscosity change even during storage, and a cosmetic thereof.

Background Art

[0002] In the technical fields of pharmaceuticals, cosmetics, etc., as water-soluble thickeners, natural thickeners represented by xanthan gum, guar gum, etc., semi-synthetic thickeners represented by hydroxyethyl cellulose, carboxymethyl cellulose, etc., and synthetic thickeners represented by carboxyvinyl polymer, polyethylene oxide, etc. are widely used.

[0003] Among these thickeners, carboxyvinyl polymer is inexpensive, has a high thickening effect, and can be gelled in a small amount, so it is widely used. However, when carboxyvinyl polymer is used, there are problems such as a limited pH range in which thickening is possible, a significant decrease in the thickening effect when a salt-type active drug is formulated, or a feeling of stickiness when applied to the skin when the formulation amount is increased.

[0004] Also, xanthan gum has less temperature dependence compared to other thickeners, is stable in a wide pH range, and exhibits salt tolerance. On the other hand, due to some of its characteristics, it can also cause a feeling of sliminess and stickiness, which may significantly harm the usability of the product.

[0005] From such a background, for example, attempts have been made to combine xanthan gum with other thickeners to obtain a highly stable cosmetic, but the development of a cosmetic that sufficiently meets the requirements of consumers has not been achieved (Patent Document 1).

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] The present invention relates to a thickening composition and cosmetic product thereof, characterized by the inclusion of glucomannan, and provides a thickening composition and cosmetic product thereof that have a high thickening effect even at low concentrations and further suppress changes in viscosity over time during storage. [Means for solving the problem]

[0008] In view of the above circumstances, the inventors conducted diligent studies and found that a thickening composition containing glucomannan has a high thickening effect even at low concentrations, and furthermore, can suppress changes in viscosity over time. They also found that a cosmetic composition containing the aforementioned thickening composition has a high thickening effect and high stability over time, thus completing the present invention.

[0009] The first aspect of the present invention is a thickening composition characterized by containing glucomannan.

[0010] The second aspect of the present invention is the thickening composition of the first aspect of the present invention, further characterized by containing a water-soluble thickener (excluding glucomannan). Adding a water-soluble thickener other than glucomannan results in a thickening composition with higher stability over time, and this aspect corresponds to this preferred form.

[0011] The third aspect of the present invention provides a cosmetic composition characterized by containing the first or second thickening composition. By including the first or second thickening composition, a cosmetic composition with high long-term stability can be obtained. [Effects of the Invention]

[0012] This invention, by containing glucomannan, provides a high thickening effect even at low concentrations and achieves high stability over time, even during storage. Furthermore, even when these thickening compositions are incorporated into cosmetics, they maintain a high thickening effect and stability while achieving a smooth texture. [Modes for carrying out the invention]

[0013] The glucomannan and water-soluble thickener that constitute the present invention, as well as the form of the cosmetic composition of the present invention, will be described in detail below.

[0014] (Glucomannan) The glucomannan used in the thickening composition of the present invention is a water-soluble polysaccharide-based thickening agent found abundantly in konjac potatoes and the like, and is not particularly limited for cosmetic applications. Also known as konjac mannan or konjac gum, it is preferably derived from konjac potatoes or Amorphophallus muereri, and more preferably from Amorphophallus muereri.

[0015] Commercially available glucomannan can be used in the present invention; for example, SOLAGUM GM manufactured by SEPPIC can be used.

[0016] In this invention, the glucomannan content is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. The upper limit is preferably 3.0% by mass or less, and more preferably 1.5% by mass or less. If the amount is less than 0.1% by mass, it is difficult to obtain a high thickening effect, while if the amount exceeds 3.0% by mass, the effect commensurate with the amount may not be obtained.

[0017] [Water-soluble thickener] The thickening composition of the present invention can contain water-soluble thickeners other than glucomannan, as it results in a more stable dosage form over time, and can be used alone or in combination of two or more.

[0018] Examples of water-soluble thickeners include aqueous or amphiphilic polymers containing acrylamide, acryloyldimethyltaurine, or salts thereof as constituent units, xanthan gum, gum arabic, caesalpinia spinosa gum, carbomer, and (acrylates / alkyl acrylate (C10-30)) crosspolymer.

[0019] Specifically, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide) crosspolymer, (acrylamide / sodium acryloyldimethyltaurate) copolymer, polyacrylate-13 (polymer of acrylic acid, acrylamide, sodium acrylate and sodium acryloyldimethyltaurate), polyacrylate crosspolymer-6 (ammonium acryloyldimethyltaurate) Examples include ammonium methylacrylamide, a copolymer of lauryl methacrylate and laureth-4 methacrylate crosslinked with trimethylolpropane triacrylate, (acrylamidopropyltrimonium chloride / acrylates) copolymer, polyacrylamide, (acrylamide / ammonium acrylate) copolymer, (acrylates / alkyl (C10-30) acrylate) crosspolymer, carbomer, xanthan gum, gum arabic, and Caesalpinia spinosa gum, among which xanthan gum and gum arabic are preferred.

[0020] Commercially available water-soluble thickeners can be used; for example, SOLAGUM AX (containing xanthan gum and gum arabic) manufactured by SEPPIC can be used.

[0021] The blending amount of the water-soluble thickener is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, based on the thickening composition of the present invention. The upper limit is preferably 1.0% by mass or less, more preferably 0.5% by mass or less. If the blending amount is less than 0.01% by mass, it is difficult to obtain stability over time. On the other hand, even if the blending amount exceeds 1.0% by mass, the effect corresponding to the blending amount may not be obtained.

[0022] In addition to this essential component, the cosmetic of the present invention may appropriately contain components usually used in cosmetics, such as oily raw materials, surfactants, polymer compounds, antioxidants, whitening agents, moisturizing agents, drugs, ultraviolet absorbers, sequestering agents, proteins, protein hydrolysates or their derivatives, amino acids or their derivatives, pH adjusters, preservatives, and the like.

[0023] Examples of the oily raw materials, surfactants, polymer compounds, antioxidants, whitening agents, moisturizing agents, drugs, ultraviolet absorbers, sequestering agents, proteins, protein hydrolysates or their derivatives, amino acids or their derivatives, pH adjusters, preservatives, etc. include those similar to those described in WO2022 / 080287.

[0024] The cosmetic of the present invention is not particularly limited, but can be made into dosage forms such as liquid, emulsion, paste, cream, gel, etc., and cream, emulsion, and gel are preferred. For example, it can be used as skin care cosmetics such as lotion, emulsion, cream, lotion, sunscreen cream, etc. and hair care cosmetics such as hair mask.

Examples

[0025] Next, the present invention will be specifically described with reference to examples, but the present invention is not limited to the examples. The numerical values described in the tables of the examples are all mass percentages based on the total mass of the cosmetic.

[0026] Examples 1 to 3 and Comparative Examples 1 to 3: Thickening composition In the formulations shown in Table 1 below, components (A) and (B) were weighed separately. A thickened composition was prepared by adding component (B) to component (A), and then adding and mixing component (C). Subsequently, the viscosity was measured after storage at 25°C for one week, and the long-term stability was evaluated by the method described below. A Brookfield LVT viscometer was used for viscosity measurement.

[0027] (Method for evaluating stability over time) The thickening compositions prepared as described above were stored in a 45°C constant temperature bath for 4 weeks, and the viscosity after storage was measured. The stability over time was evaluated according to the following evaluation criteria.

[0028] (Evaluation criteria for stability over time) ◎: Viscosity change was less than ±10% of the viscosity after storage at 25℃ for one week. ○: The viscosity change after storage at 25°C for one week was ±10% or more and less than 20%. △: The viscosity change after storage at 25°C for one week was ±20% or more and less than 30%. ×: The viscosity change was ±30% or more compared to the viscosity after storage at 25°C for one week.

[0029] [Table 1] In Table 1, *1 SOLAGUM GM *2 SOLAGUM AX (product name, manufactured by SEPPIC) *3 Labor Gum GS-C (product name, manufactured by MP Gokyo Food & Chemical Co., Ltd.) *4 SOLAGUM TARA (product name, manufactured by SEPPIC) It was formulated as such.

[0030] As is clear from the results in Table 1, the thickening composition of Example 1, which contains glucomannan, showed a viscosity approximately 10 times higher after 1 week of storage at 25°C compared to the case containing xanthan gum or caesalpinia spinosa gum, demonstrating a high thickening effect. Furthermore, its stability over time at 45°C for 1 month was also found to be equivalent to that of existing xanthan gum and caesalpinia spinosa gum. Furthermore, it is clear that Examples 2 and 3, in which glucomannan was mixed with xanthan gum and gum arabic, exhibited an even higher thickening effect than Example 1, which used glucomannan alone.

[0031] Examples 4-6 and Comparative Examples 4-6: Emulsions In the formulations shown in Table 2 below, components (A) and (B) were weighed separately. Further, component (B) was added to component (A), and then component (C) was added to prepare an emulsion. Subsequently, the viscosity was measured at 25°C after one week, as in the above examples and comparative examples, to evaluate the stability over time.

[0032] [Table 2] In Table 2, *1 and *3 are the same as in Table 1. *4 MONTANOV 68 MB (product name, manufactured by SEPPIC) It was formulated as such.

[0033] As shown in Table 2, Example 4, which contains 1% glucomannan, exhibited a viscosity more than 10 times greater after one week compared to Comparative Example 4, which contains 1% xanthan gum, demonstrating a high thickening effect. Furthermore, Examples 3 and 4, which contain 0.5% or 0.3% glucomannan or xanthan gum, also showed similarly high thickening effects compared to Comparative Examples 5 and 6, which contain xanthan gum. Moreover, it was clear that they exhibited equivalent or superior performance in terms of stability over 1 month at 45°C.

[0034] Other examples are described below. All examples were manufactured by conventional methods. In all cases, a cosmetic composition with high thickening effect and stability over time was obtained.

[0035] [Example 7: Gel] Purified water...residual Glucomannan*1 ··1.0% by mass Hydrolyzed red algae extract, water, BG*5 - 1.0% by mass Imosemil extract, BG, Water*6 ··2.0% by mass Xylitylglucoside, anhydrous xylitol, xylitol, water*7 ··2.0% by mass Preservatives ·· 1.0% by mass Fragrance · 0.05% by mass Dye...0.01% by mass Triethylamine - appropriate amount (adjust to pH 5-5.5)

[0036] [Example 8: Night Cream] Purified water...residual Arachidyl glucoside, arachidyl alcohol, behenyl alcohol*8 ··3.0% by mass (C15-19) Alkanes*9··4.0% by mass Glycol palmitate*10 ··2.0% by mass (Caprylic / Capric Acid) Coconut Alkyl*11 ··6.0% by mass Caprylic / Capric Triglyceride 10.0% by mass Shea butter...3.0% by mass Glucomannan*1 ··0.8% by mass Heptyl glucoside, water*12··1.0% by mass Preservatives ··0.5% by mass Fragrance · 0.1% by mass Triethylamine (adjusted to pH 5-5.5)

[0037] In Examples 7 and 8, *5 CONTACTICEL *6 CODIAVELANE BG PF *7 AQUAXYL *8 MONTANOV 202 *9 EMOGREEN L15 *10 LANOLP *11 LANOL 2681 *12 SEPICLEAR G7 (product name, manufactured by SEPPIC) It was formulated as such.

Claims

1. A thickening composition characterized by containing glucomannan.

2. The thickening composition according to claim 1, further characterized by containing a water-soluble thickening agent (excluding glucomannan).

3. A cosmetic composition characterized by containing the thickening composition described in claim 1 or 2.

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