A color-changing two-part composition and method of making the same

Abstract

The application discloses a color-changing double-agent composition and a preparation method thereof. The color-changing double-agent composition comprises the following components in percentage by weight: polyhydric alcohol 2-30%, vitamin C 0.2-1.5%, CLITORIA TERNATEA flower extract 0.07-0.35%, and deionized water 0.18-1%. The double-agent composition further comprises the following components: viscosity regulator 0.1-1%, PH regulator 0.05-1%, and deionized water in remainder. The sum of the weight percentages of the components in the double-agent composition is 100%. The double-agent composition is mixed before use, and obvious color change can be observed before and after mixing, so that the user can conveniently judge whether the mixing is uniform. The double-agent composition is acidic and alkaline respectively, which is more beneficial to the preservation of active ingredients, avoids the breeding of microorganisms, reduces the stimulation of the product caused by the addition of preservatives in the formula, and improves the mildness of the product.

Description

Technical Field

[0001] This invention belongs to the field of daily cosmetics technology, and particularly relates to a color-changing dual-agent composition and its preparation method. Background Technology

[0002] As living standards improve, people have higher and higher requirements for skincare, demanding greater efficacy, novelty, and user experience from skincare products.

[0003] Vitamin C (ascorbic acid) is a popular skincare ingredient, widely used in cosmetics due to its antioxidant, whitening, and collagen-boosting effects. However, vitamin C is highly susceptible to oxidation, especially under conditions of light, high temperature, and oxygen. Oxidized vitamin C loses its activity and may even turn yellow or brown. Although vitamin C is relatively stable in acidic environments, it cannot be applied directly to the face. Most skincare products typically have a pH between 5 and 7, which can lead to vitamin C degradation during storage, affecting its activity. This limits its application in cosmetics, especially face masks. Current technologies address vitamin C degradation by using vitamin derivatives or encapsulating it in microcapsules to protect it from external environmental influences and extend its stability. However, vitamin C derivatives are expensive, and the capsule preparation process is relatively complex, requiring specialized equipment and technology, leading to increased production costs. Furthermore, capsules may aggregate, rupture, or dissolve during storage, affecting their stability and release characteristics. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides a color-changing dual-agent composition and its preparation method. The color-changing dual-agent composition consists of two agents, which are stored separately before use. When used, the two agents are mixed evenly. There is a significant color change in the reagents before and after mixing. When used in products such as face masks, the user experience is novel, which is beneficial for product preservation and prevents the growth of microorganisms. At the same time, it can reduce the addition of preservatives in the formula, thereby reducing the product irritation caused by preservatives and significantly improving the product's mildness.

[0005] To achieve the above objectives, one aspect of the present invention provides a color-changing dual-agent composition, characterized in that, by weight percentage, the color-changing dual-agent composition comprises the following components: Agent 1 Polyols 2-30%, Vitamin C 0.2-1.5%, Butterfly pea (Clitoria ternaea) flower extract 0.07–0.35%, Deionized water 0.18-1%; Agent 2 Viscosity modifier 0.1-1%, pH adjuster 0.05-1%. Deionized water balance. The sum of the weight percentages of the components of Agent 1 and Agent 2 is 100%.

[0006] Further, the polyol is selected from one or more of glycerol, butanediol, and 1,3-propanediol; preferably, the polyol content is 2-10%, and it is selected from one or more of glycerol and butanediol.

[0007] Furthermore, the vitamin C content is 0.3-1%, the butterfly pea (CLITORIA TERNATEA) flower extract content is 0.09-0.3%, and the deionized water content is 0.23-1%.

[0008] In one embodiment of the present invention, the vitamin C content is 1%, the butterfly pea (Clitoria ternaea) flower extract content is 0.3%, and the deionized water content is 0.9%.

[0009] In Agent 2: The viscosity modifier is selected from one or more of the following: carbomer, acrylate / C10-30 alkanol acrylate crosspolymer, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, xanthan gum, ammonium polyacryloyldimethyl taurate, sodium polyacrylate, sodium polyacryloyldimethyl taurate, etc. The thickener of this type has good miscibility with phase 1. Preferably, the content of the viscosity modifier is 0.1-0.5%.

[0010] The pH adjuster content is 0.07-1%.

[0011] Furthermore, agent 2 also contains an active ingredient, which is stable under alkaline conditions. Further, the active ingredient is selected from one or more of panthenol, purslane extract, and nicotinamide, and the content of the active ingredient is 0.01–10%. Furthermore, agent 2 also contains a skin feel modifier, which is selected from one or more of hydroxyethyl cellulose, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, and the content of the skin feel modifier is 0.01-10%.

[0012] Furthermore, agent 2 may further contain 0.07 to 0.1% of a neutralizing agent, wherein the neutralizing agent is arginine.

[0013] Furthermore, the pH range of agent 2 is 8.0 to 12.2.

[0014] Furthermore, the pH difference between the agent 2 and the mixture of agent 1 and agent 2 is 1.5 to 7, preferably 5.5 to 6.9.

[0015] Within this range, after mixing Agent 1 and Agent 2, the color of the butterfly pea (CLITORIA TERNATEA) flower extract changed significantly, making it easier to distinguish whether Agent 1 and Agent 2 were mixed evenly.

[0016] Furthermore, the viscosity range of the mixture of agent 1 and agent 2 is 800 to 4000 mPa. Within this range, agent 1 and agent 2 can be mixed quickly, and the butterfly pea (CLITORIA TERNATEA) flower extract can change color uniformly.

[0017] Another aspect of the present invention provides a method for preparing a color-changing dual-agent composition, wherein the method comprises the following steps: i) Dissolve butterfly pea (CLITORIA TERNATEA) flower extract in deionized water; ii) Dissolve the polyol and vitamin C together, add the solution obtained in step 1, and stir until well mixed. Agent 1 is prepared for later use; Preparation of Agent 2: iii) Mix the viscosity modifier with water until homogeneous; iv) Add pH adjuster and stir well; prepare Agent 2 for later use.

[0018] Furthermore, other active ingredients, skin feel modifiers, and neutralizers that are preserved under alkaline conditions may be added to Agent 2.

[0019] The present invention also provides a method of using a color-changing dual-agent composition, wherein the method of use includes the following steps: mixing agent 1 and agent 2 evenly. Beneficial effects

[0020] 1. In the color-changing dual-agent composition of the present invention, the acidic environment of agent 1 is conducive to preserving the activity of vitamin C. When used, agents 1 and 2 are mixed to quickly form a product with suitable pH.

[0021] 2. The color-changing two-agent composition of the present invention has a fast color-changing speed, high color uniformity, and obvious color difference when used, which makes it convenient for users to quickly judge whether the mixture is uniform. It has broad application prospects in two-agent products such as face masks.

[0022] 3. The addition of vitamin C and butterfly pea (Clitoria ternata) flower extract to the color-changing dual-agent composition of the present invention can enhance the product's antioxidant effects, and the use of the face mask provides a novel experience. It can effectively prevent the growth of microorganisms when stored in acidic and alkaline environments, thereby reducing the addition of preservatives in the formula, thus avoiding product irritation caused by preservatives and improving the overall gentleness of the product. Attached Figure Description

[0023] Appendix Figure 1 Example 1: Colors of the two agents before and after mixing (left side: before mixing; right side: after mixing) Appendix Figure 2 Example 2: Colors of the two agents before and after mixing (left side is before mixing, right side is after mixing) Appendix Figure 3 Example 3: Colors of the two agents before and after mixing (left side: before mixing; right side: after mixing) Appendix Figure 4 Comparative Example 1: Colors of the two agents before and after mixing (left: before mixing; right: after mixing) Appendix Figure 5 Comparative Example 2: Colors of the two agents before and after mixing (left side: before mixing; right side: after mixing) Appendix Figure 6 Comparative Example 2: Colors of the two agents before and after mixing (left side: before mixing; right side: after mixing) Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] Experimental methods in the following examples that do not specify specific conditions should be performed according to conventional methods and conditions, or according to the product instructions. All reagents and raw materials used in this invention are commercially available.

[0026] The butterfly pea (Clitoria ternata) flower extract used in this embodiment was purchased from Yunnan Yingge Biotechnology Co., Ltd. It is a natural pigment and functional ingredient, primarily derived from butterfly pea flowers. Butterfly pea flower extract is rich in antioxidants and can meet the application needs of various fields.

[0027] Example 1: Preparation of the color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.09 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.21 parts of water; 2. Mix and dissolve 2 parts glycerol and 0.3 parts VC, add the solution from step 1 to it, stir and mix evenly, and prepare reagent 1 for later use.

[0028] Preparation of Agent 2: 1. Mix 0.07 parts of viscosity modifier acrylate / C10-30 alkanol acrylate crosspolymer, 0.05 parts of hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, and 0.05 parts of xanthan gum with water until homogeneous; 2. Add 0.07 parts of pH adjuster NaOH and stir well; 3. Add the efficacy additives (0.5 parts panthenol, 0.5 parts niacinamide), skin feel modifier (0.03 parts hydroxyethylcellulose), 0.3 parts p-hydroxyacetophenone, and 0.07 parts arginine, stir and mix evenly, and prepare Agent 2 for later use.

[0029] Example 2: Preparation of the color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.1 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.3 parts of water; 2. Mix and dissolve 5 parts butanediol and 0.6 parts vitamin C, add the solution from step 1 to the mixture, stir and mix evenly, and prepare reagent 1 for later use.

[0030] Preparation of Agent 2: 1. Mix 0.1 parts of viscosity modifier (acrylate / C10-30 alkanol acrylate crosslinking polymer) with water until homogeneous; 2. Add 0.14 parts of pH adjuster NaOH and stir well; 3. Add the efficacy additives (purslane extract 0.5 parts, niacinamide 0.5 parts), skin feel modifier (PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin 0.5 parts), p-hydroxyacetophenone 0.3 parts, arginine 0.1 parts, stir and mix evenly, and prepare Agent 2 for later use.

[0031] Example 3 Preparation of the color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.3 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.9 parts of water; 2. Mix 10 parts glycerin and 1 part VC to dissolve, add the solution from step 1 to it, stir and mix evenly, and prepare reagent 1 for later use.

[0032] Preparation of Agent 2: 1. Mix 0.15 parts of viscosity modifier hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer and 0.05 parts of xanthan gum with water until homogeneous; 2. Add 0.23 parts of pH adjuster NaOH and stir well; 3. Add the efficacy additives (0.5 parts panthenol, 0.5 parts niacinamide) and the skin feel modifier (0.5 parts PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin), stir and mix evenly, and prepare Agent 2 for later use.

[0033] Table 1. Formulations of face masks in Examples 1-3

[0034] Comparative Example 1: Preparation of a color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.2 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.6 parts of water; 2. Mix and dissolve 5 parts butanediol and 0.3 parts vitamin C, add the solution from step 1 to the mixture, stir and mix evenly, and prepare reagent 1 for later use.

[0035] Preparation of Agent 2: 1. Mix 0.2 parts of viscosity modifier acrylate / C10-30 alkanol acrylate crosslinking polymer, 0.2 parts of hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, and 0.2 parts of xanthan gum with water until homogeneous; 2. Add 0.07 parts of pH adjuster NaOH and stir well; 3. Add the efficacy additive (panthenol 0.5 parts), skin feel modifier (PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin 0.5 parts), p-hydroxyacetophenone 0.3 parts, and arginine 0.2 parts, stir and mix evenly, and prepare Agent 2 for later use.

[0036] Comparative Example 2: Preparation of the color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.05 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.15 parts of water; 2. Mix and dissolve 5 parts butanediol and 0.1 parts vitamin C, add the solution from step 1 to the mixture, stir and mix evenly, and prepare reagent 1 for later use.

[0037] Preparation of Agent 2: 1. Mix 0.07 parts of viscosity modifier acrylate / C10-30 alkanol acrylate crosslinking polymer, 0.05 parts of hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, and 0.05 parts of xanthan gum with water until homogeneous; 2. Add 0.023 parts of pH adjuster NaOH and stir well; 3. Add skin feel modifier (PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin 0.5 parts), p-hydroxyacetophenone 0.3 parts, arginine 0.07 parts, stir and mix evenly, and prepare agent 2 for later use.

[0038] Comparative Example 3: Preparation of a color-changing dual-agent composition Preparation of Agent 1: 1. Dissolve 0.1 parts of butterfly pea (CLITORIA TERNATEA) flower extract in 0.3 parts of water; 2. Mix and dissolve 5 parts butanediol and 0.3 parts vitamin C, add the solution from step 1 to the mixture, stir and mix evenly, and prepare reagent 1 for later use.

[0039] Preparation of Agent 2: 1. Mix 0.07 parts of viscosity modifier hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, 0.05 parts of hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, and 0.2 parts of xanthan gum with water until homogeneous; 2. Add 0.1 parts of pH adjuster NaOH and stir well; 3. Add the efficacy additive (0.5 parts niacinamide), skin feel modifier (0.5 parts PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin), and 0.3 parts p-hydroxyacetophenone, stir and mix evenly, and prepare Agent 2 for later use.

[0040] Table 2 Formulations of Comparative Examples 1-3

[0041] After thoroughly mixing agents 1 and 2 from Examples 1-3 and Comparative Examples 1-3, the color changes, color change rate, color uniformity, and whether there was a significant color difference before and after mixing were observed. The evaluation results are shown in Table 3, and the color changes of agents 1 and 2 before and after mixing are shown in Appendix 4. Figure 1-6 .

[0042] Table 3 Comparison of color development effects of Examples 1-3 and Comparative Examples 1-3

[0043] As shown in Table 3, the pH of Agent 1 in Examples 1-3 was controlled under acidic conditions, and the water content was low, which was beneficial to ensuring the activity of vitamin C. Before mixing, Agent 1 contained butterfly pea flower extract, and under acidic conditions, it appeared pink to purplish-red. The pH of Agent 2 was controlled under alkaline conditions between 8 and 12.2. When using Agent 1 and Agent 2, they were mixed evenly, and the final membrane solution pH was maintained at 5.0-7.0, appearing blue. There was a significant color difference.

[0044] In Example 3, the pH difference between Agent 2 and the mixed product was relatively large, and the viscosity was low, resulting in the most significant color difference change before and after mixing, and the color change was rapid. The uniformity was also higher, enabling more effective display of color differences before and after mixing.

[0045] If the viscosity of agent 2 in Comparative Example 1 is too high, agent 1 cannot be quickly and evenly mixed with agent 2 during mixing, resulting in slow color change speed and uneven color development before and after mixing.

[0046] The low content of butterfly pea flower extract in Agent 1 in Comparative Example 2 resulted in insignificant color change after Agent 1 and Agent 2 were mixed, and no obvious color change phenomenon could be observed in this system.

[0047] In Comparative Example 3, if the pH value changes little before and after mixing agent 1 and agent 2, no obvious color change can be observed.

[0048] Consumers were selected to use the two-component facial mask mixture of Examples 1-3 and Comparative Examples 1-3 sequentially. The skin feel during use was further evaluated, and the evaluation results are shown in Table 4. Table 4. Evaluation of skin feel results for Examples 1-3 and Comparative Examples 1-3 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Skin feel Hydrating Hydrating Hydrating Too sticky Hydrating Hydrating Irritating none none none none none none As shown in Table 4, Examples 1-3 provided good hydration during use, while Comparative Example 1, due to its higher viscosity, had a slightly sticky feel. The mixture of both agents was non-irritating to the skin and effectively protected it.

[0049] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A color-changing dual-agent composition, characterized in that, The color-changing dual-agent composition comprises the following components by weight percentage: Agent 1: Polyol 2-30%, Vitamin C 0.2-1.5%, Butterfly pea (Clitoria ternaea) flower extract 0.07–0.35%, Deionized water 0.18-1%; Agent 2 Viscosity modifier 0.1-1%, pH adjuster 0.05-1% Deionized water balance The sum of the weight percentages of the components of Agent 1 and Agent 2 is 100%.

2. The color-changing dual-agent composition as described in claim 1, characterized in that, The polyol is selected from one or more of glycerol, butanediol, and 1,3-propanediol; preferably, the polyol content is 2-10%, and it is selected from one or more of glycerol and butanediol.

3. The color-changing dual-agent composition as described in claim 1, characterized in that, The vitamin C content is 0.3-1%, the butterfly pea (Clitoria ternaea) flower extract content is 0.09-0.3%, and the deionized water content is 0.23-1%.

4. The color-changing dual-agent composition as described in claim 1, characterized in that, The vitamin C content is 1%, the butterfly pea (Clitoria ternaea) flower extract content is 0.3%, and the deionized water content is 0.9%.

5. The color-changing dual-agent composition as described in claim 1, characterized in that, The viscosity modifier is selected from one or more of the following: carbomer, acrylate / C10-30 alkanol acrylate crosspolymer, hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, xanthan gum, ammonium polyacryloyl dimethyl taurate, sodium polyacrylate, sodium polyacryloyl dimethyl taurate, etc., and the content of the viscosity modifier is 0.1-0.5%.

6. The color-changing dual-agent composition as described in claim 1, characterized in that, The pH adjuster content is 0.07–0.25%.

7. The color-changing dual-agent composition as described in claim 1, characterized in that, The pH range of agent 2 is 8.0 to 12.2, and the pH difference between agent 2 and the mixture of agent 1 and agent 2 is 1.5 to 7, preferably 5.5 to 6.

9.

8. The color-changing dual-agent composition as described in claim 1, characterized in that, The viscosity range of the mixture of agent 1 and agent 2 is 800–4000 MPa.

9. A method for preparing the color-changing dual-agent composition as described in claims 1-8, characterized in that, The method includes the following steps: i) Dissolve butterfly pea (CLITORIA TERNATEA) flower extract in deionized water; ii) Dissolve the polyol and vitamin C together, add the solution obtained in step 1, stir and mix evenly, and prepare reagent 1 for later use; iii) Mix the viscosity modifier with water until homogeneous; iv) Add pH adjuster and stir well; prepare Agent 2 for later use.

10. A method of using the color-changing dual-agent composition as described in claims 1-8, characterized in that, The method of use includes the following steps: mix agent 1 and agent 2 evenly.

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