Eye anti-rubbing water dosage form protection liquid and preparation method thereof

Abstract

The invention relates to the technical field of cosmetics, and particularly discloses an eye anti-rubbing water dosage form protection liquid and a preparation method thereof. The eye anti-rubbing water dosage form protection liquid is prepared from the following raw materials in parts by weight: 50-70 parts of water, 1-2 parts of a thickening agent, 1-3 parts of pullulan, 9-19 parts of a film-forming agent, 1.35-1.8 parts of a humectant and 0.5-1 part of an opaque agent, wherein the film-forming agent consists of polyvinylpyrrolidone and a styrene / acrylic acid (ester) copolymer; the preparation method comprises the following steps: premixing the water, the thickening agent, the pullulan, the polyvinylpyrrolidone and part of the humectant, heating and stirring, cooling, adding the styrene / acrylic acid (ester) copolymer, stirring, continuing to add the rest humectant and opaque agent, and stirring. The eye anti-rubbing water dosage form protection liquid has good rapid film forming performance, the anti-rubbing effect is excellent after the eye anti-rubbing water dosage form protection liquid is applied to form a film, the bad experience of peeling, sticky feeling and tight feeling is not prone to occurring, and the overall application effect is excellent.

Description

Technical Field

[0001] The present application relates to the field of cosmetic technology, and more specifically, to an anti-scratch pure water formulation eye protection liquid and a preparation method thereof. Background Art

[0002] Protective fluid is a skin care product used to protect the skin from external environmental aggressions. It can effectively prevent harmful substances from invading the skin while maintaining the skin's moisture and nutrition. Its main function is to form a protective film. It can be used as the last step in the daily skin care routine. It is suitable for all skin types, especially sensitive skin and skin that needs extra protection.

[0003] Eye protection fluid is usually used after cleansing, applying toner, essence, lotion and cream. In addition to the above effects, it can also modify eye makeup, help the eye bags, eye shadow and eyeliner to show color and last longer, and meet the makeup needs of different consumers. Among them, pure water-based protective fluid, compared with traditional oil-based protective fluid, its base is water instead of oil. Therefore, when used, pure water-based protective fluid will be more refreshing and will not bring pressure to the skin. It also has good biocompatibility and can be compatible with human tissues or cells, reducing rejection reactions and irritation. The main ingredient of pure water-based protective fluid is water, which is used as a solvent. It also contains polyols to help the skin stay hydrated and soft, as well as high-efficiency moisturizing ingredients to provide continuous moisture to the skin. At the same time, film-forming components are used to help form a complete protective film.

[0004] Regarding the above-mentioned related technologies, the inventors believe that for the actual application of pure water-based protective liquid, the film-forming process often takes a long time, which may affect the immediate effect and user experience. In addition, due to the easy evaporation of water, the stability of the formed film is also poor, and it is easy to experience unpleasant experiences such as peeling, stickiness, and tightness after film formation. At the same time, it will lead to general anti-scratch effect, and it is difficult to effectively maintain the integrity of the makeup during the application process. Therefore, there is an urgent need to propose a solution to the above-mentioned technical problems. Summary of the Invention

[0005] In order to effectively improve the slow film formation of traditional pure water-based protective liquid, the unpleasant experience of peeling, stickiness and tightness after film formation, and the poor anti-scratch effect, the present application provides an eye anti-scratch pure water-based protective liquid and a preparation method thereof.

[0006] In the first aspect, the present application provides an anti-scratch pure water formulation eye protection liquid, which adopts the following technical solution: An eye protection liquid in pure water form for preventing scratches is prepared from the following raw materials in parts by weight: 50-70 parts water; 1-2 parts thickener; Pullulan 1 - 3 parts; Film - forming agent 9 - 19 parts; Humectant 1.35 - 1.8 parts; Opacifier 0.5 - 1 part; The film - forming agent is composed of polyvinylpyrrolidone and styrene / (meth)acrylate copolymer.

[0007] By adopting the above - mentioned technical solution, pullulan is a high - molecular substance that does not produce gelation but has viscous stability. It can maintain stable viscosity in a complex formulation system, has good compatibility with other water - soluble high - molecular substances, and can quickly form a uniform composite network structure in an aqueous solution by cooperating with the film - forming agent, significantly shortening the film - forming time and enhancing the stability of the film structure. Among the paired film - forming agents, the linear molecular structure of polyvinylpyrrolidone endows it with the characteristic of rapid film - forming. It closely adheres to the substrate surface through hydrogen - bond interaction, while the styrene / (meth)acrylate copolymer forms a rigid support framework through hydrophobic segments. The combination of the two can achieve the "rigid inside and flexible outside" structure design of the film layer, improving both adhesion and anti - friction ability. At the same time, pullulan and the film - forming agent composed of polyvinylpyrrolidone and styrene / (meth)acrylate copolymer can show excellent compound synergistic effects, effectively improving the poor experiences of slow film - forming, peeling, sticky feeling and tight feeling after film - forming of traditional pure - water - type protective liquids, as well as the poor anti - smudging effect, and then obtaining an eye - protection pure - water - type protective liquid with better application quality. At the same time, the above - mentioned eye - protection pure - water - type protective liquid has no discomfort for sensitive eye skin; in the actual application process, fine - flash pearlescent can be added for makeup effect enhancement, it can also be used as a highlighter, and different active substances can be added for high protection of eye skin; thus, it can be seen that the obtained eye - protection pure - water - type protective liquid is not only safe, but also can be more widely extended in products, and the overall application effect is outstanding.

[0008] Preferably, the film - forming agent is composed of the following components in parts by weight: Polyvinylpyrrolidone 2 - 5 parts; Styrene / (meth)acrylate copolymer 7 - 14 parts.

[0009] By adopting the above - mentioned technical solution, when the two are used in combination, polyvinylpyrrolidone can penetrate into the three - dimensional network gaps of the styrene / (meth)acrylate copolymer during the film - forming process, forming dynamic cross - link points through physical entanglement or hydrogen bonds, improving the stability of the film - forming structure; at the same time, polyvinylpyrrolidone can also break the sealing of the highly hydrophobic film layer of the styrene / (meth)acrylate copolymer, and the styrene / (meth)acrylate copolymer can make up for the defect of insufficient water - resistance of polyvinylpyrrolidone, so that the film - forming agent can exert excellent application effects, and finally obtain an eye - protection pure - water - type protective liquid with stable and excellent quality.

[0010] Preferably, the thickener is one or a combination of PEG-240 / HDI copolymer bis-decyltetradecyl alcohol polyether-20 ether, xanthan gum, carrageenan, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl starch phosphate.

[0011] By adopting the above technical solution, the above types of thickeners are all suitable for the preparation of eye anti-scratch pure water-based protective liquid. They increase the viscosity of the protective liquid through molecular chain entanglement or hydrogen bonding, forming a uniform colloidal network, improving fluidity and reducing component stratification, making the protective liquid have a smooth texture, reducing the sticky feeling during application, and enhancing the adsorption to the skin, thereby ensuring the excellent application effect of the eye anti-scratch pure water-based protective liquid.

[0012] Preferably, the thickener is composed of the following components in parts by weight: PEG-240 / HDI copolymer bis-decyltetradecyl alcohol polyether-20 ether 1-2 parts; Xanthan gum 0.02-0.1 parts.

[0013] By adopting the above technical solution, PEG-240 / HDI copolymer combines hydrophobic segments with hydrophilic groups to provide an instant thickening effect, while xanthan gum forms a three-dimensional network structure through hydrogen bonds to enhance the long-term viscosity stability of the system. The combination of the two achieves a smooth transition from liquid to gel state, thereby making the thickener highly adaptable in the pure water-based eye protection liquid to prevent scratching and can exert excellent corresponding effects.

[0014] Preferably, the moisturizing agent is one or a combination of sodium hyaluronate, 1,2-hexanediol, 1,3-propylene glycol, caprylyl glycol and ethylhexylglycerin.

[0015] By adopting the above technical solution, the moisturizer combines with water through hydrogen bonds to form a "hydration layer" to cover the skin surface, reduce the evaporation rate of water after the use of the protective liquid, and maintain the skin's hydration; and the above types of moisturizers are all suitable for the preparation of eye anti-scratch pure water dosage form protective liquid.

[0016] Preferably, the moisturizing agent is composed of the following parts by weight of a first moisturizing component, a second moisturizing component and a third moisturizing component: 0.05-0.1 part of the first moisturizing component; 0.4-0.6 parts of the second moisturizing component; 0.9-1.1 parts of the third moisturizing component; The first moisturizing component is sodium hyaluronate, the second moisturizing component is 1,2-hexanediol, and the third moisturizing component is a mixture of 1,3-propylene glycol, caprylyl glycol, and ethylhexylglycerin.

[0017] By adopting the above technical solution, in the selected combination of the above raw materials, sodium hyaluronate adsorbs a large amount of water through a macromolecular network structure to form a long-acting moisturizing film layer; 1,2-hexanediol and 1,3-propanediol can quickly penetrate the stratum corneum to fill the gap of natural moisturizing factors and achieve progressive moisturization from the inside out; octyldodecanol and ethylhexylglycerin can not only play a moisturizing role, but also neutralize the sticky feeling and reduce the risk of irritation to sensitive skin; therefore, the moisturizer composed of the above raw materials can synergistically achieve mild and efficient moisturizing protection, which is beneficial to obtain an eye anti-smudging pure water-based protective liquid with excellent application quality.

[0018] Preferably, the opacifier is a composition of one or more of synthetic fluorophlogopite, natural mica powder, titanium dioxide, diatomaceous earth, talc powder, kaolin and calcium carbonate.

[0019] By adopting the above technical solution, the opacifier can reduce the oxidative decomposition caused by ultraviolet rays or oxygen, maintain the efficacy stability of the protective liquid, and use its own suspension to stabilize the formulation system, reduce the layering or precipitation phenomenon after long-term standing, and can also adjust the texture of the product; and the above types of opacifiers can be selected according to needs, which can not only obtain a diversified eye anti-smudging pure water-based protective liquid, but also ensure that the eye anti-smudging pure water-based protective liquid has better fast film-forming property, excellent anti-smudging effect after film formation, and is not prone to adverse experiences such as peeling, stickiness and tightness, and the overall application effect is excellent.

[0020] In a second aspect, the present application provides a preparation method of an eye anti-smudging pure water-based protective liquid, adopting the following technical solution: A preparation method of an eye anti-smudging pure water-based protective liquid includes the following steps: (1) Prepare raw materials including water, thickener, pullulan, film-forming agent, moisturizer and opacifier according to the ratio. (2) Premix the water, thickener, pullulan, polyvinylpyrrolidone and the first moisturizing component in step (1), heat and stir, then cool, and then add styrene / acrylate copolymer, stir, and then continue to add the second moisturizing component, the third moisturizing component and the opacifier, and stir again to obtain the eye anti-smudging pure water-based protective liquid.

[0021] By adopting the above technical solution, the above preparation method is simple to operate, and the orderly addition and use of each raw material in the process not only facilitates quality control during the process, but also enables each raw material to cooperate fully, and thus an eye anti-smudging pure water-based protective liquid with excellent and stable quality can be obtained, and the whole is also suitable for large-scale industrial production.

[0022] In summary, the present application has the following beneficial effects: By compounding the film-forming agent composed of pullulan and polyvinylpyrrolidone, styrene / (meth)acrylate copolymer, the present application can effectively improve the poor experiences of the traditional pure water-based protective solution, such as slow film formation, peeling, sticky feeling and tight feeling after film formation, as well as the phenomenon of poor anti-smudging effect, so as to obtain an eye anti-smudging pure water-based protective solution with better application quality. At the same time, the eye anti-smudging pure water-based protective solution obtained in the present application is safer for sensitive skin around the eyes, and different active substances can also be added for more extensive product expansion, with outstanding overall application effects. Detailed Embodiments

[0023] The present application will be further described in detail below with reference to examples and comparative examples.

[0024] Unless otherwise specified, the raw materials used in the examples and comparative examples of the present application are all commercially available. Examples

[0025] Example 1 An eye anti-smudging pure water-based protective solution, the raw materials used in its preparation and their corresponding weight parts are shown in Table 1, and it is obtained through the following steps: (1) Prepare the raw materials including water, thickener, pullulan, film-forming agent, humectant and opacifier according to the ratio; (2) Premix the water, thickener, pullulan, polyvinylpyrrolidone and the first humectant component in step (1), heat to 70-85 °C (80 °C is selected in this example) and stir, then cool to below 60 °C (45 °C is selected in this example), then add styrene / (meth)acrylate copolymer, stir, continue to add the second humectant component, the third humectant component and the opacifier, and stir again to obtain the eye anti-smudging pure water-based protective solution.

[0026] Note: In the above operations, the film-forming agent is composed of polyvinylpyrrolidone and styrene / (meth)acrylate copolymer, and the components of the film-forming agent and their corresponding weight parts are shown in Table 2; the thickener is composed of PEG-240 / HDI copolymer bis-decyldodeceth-20 ether and xanthan gum, and the components of the thickener and their corresponding weight parts are shown in Table 3; the humectant is composed of the first humectant component, the second humectant component and the third humectant component. The first humectant component is sodium hyaluronate, the second humectant component is 1,2-hexanediol, and the third humectant component is a mixture of 1,3-propanediol, octyldecanol and ethylhexylglycerin, and the components of the humectant and their corresponding weight parts are shown in Table 4; the opacifier is synthetic fluorophlogopite.

[0027] Examples 2-3 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that the raw materials used in its preparation and their corresponding parts by weight are shown in Table 1.

[0028] Table 1 Raw materials used in the preparation of Examples 1-3 and their corresponding parts by weight (parts / kg) Examples 4-5 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that the components of the film-forming agent and their corresponding parts by weight are shown in Table 2.

[0029] Table 2 Components of the film-forming agent in Examples 1, 4-5 and their corresponding parts by weight (parts / kg) Examples 6-7 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that the components of the thickener and their corresponding parts by weight are shown in Table 3.

[0030] Table 3 Components of the thickener in Examples 1, 6-7 and their corresponding parts by weight (parts / kg) Examples 8-9 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that the components of the humectant and their corresponding parts by weight are shown in Table 4.

[0031] Table 4 Components of the humectant in Examples 1, 8-9 and their corresponding parts by weight (parts / kg) Component Example 1 Example 8 Example 9 First moisturizing component 0.075 0.05 0.1 Second moisturizing component 0.5 0.4 0.6 Third moisturizing component 1.0 0.9 1.1 Comparative examples Comparative example 1 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that pullulan and polyvinylpyrrolidone are not used in the raw materials. Comparative example 2 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that pullulan and styrene / (meth)acrylate copolymer are not used in the raw materials.

[0032] Comparative example 3 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that polyvinylpyrrolidone and styrene / (meth)acrylate copolymer are not used in the raw materials.

[0033] Comparative example 4 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that pullulan is not used in the raw materials.

[0034] Comparative Example 5 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that polyvinylpyrrolidone is not used in the raw materials.

[0035] Comparative Example 6 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that styrene / acrylic acid (ester) copolymer is not used in the raw materials.

[0036] Comparative Example 7 An eye anti-smudging pure water-based protective liquid, which is different from that of Example 1 in that pullulan, polyvinylpyrrolidone and styrene / acrylic acid (ester) copolymer are not used in the raw materials.

[0037] Performance detection test Test samples: The eye anti-smudging pure water-based protective liquids obtained in Examples 1-9 were selected as Test Samples 1-9, and the eye anti-smudging pure water-based protective liquids obtained in Comparative Examples 1-7 were selected as Control Samples 1-7.

[0038] Test method: (1) Film formation speed test, the test environment was set to constant temperature and humidity conditions, specifically at a temperature of 25°C ± 1°C and a humidity of 50% ± 5%. A PMMA plate was used to simulate the human surface, and the protective liquid was evenly applied according to the standard dosage of 2 mg / cm 2 The weight change caused by solvent volatilization was measured by a high-precision balance. When the difference in three consecutive measurements was less than 0.5%, it was determined that the film formation was completed, and the film formation time was recorded at this time; (2) Test for adverse experiences such as peeling, stickiness and tightness after film formation. Randomly select 10 women aged 20-40 as testers. All testers have at least 3 years of experience in using protective liquid products. The application amount can be based on the testers' own usage habits; The results were fed back and statistically analyzed by questionnaire, and scored on a scale of 1-10, where 10 is the best and 1 is the worst. The scores were based on the evaluation criteria of at least 3 years of protective liquid product usage of each of the 10 testers, and then the average score of the 10 testers was recorded as the final score of the corresponding sample; (3) The test environment was set to constant temperature and humidity conditions, specifically at a temperature of 25°C ± 1°C and a humidity of 50% ± 5%. A PMMA plate was used to simulate the human surface, and the protective liquid was evenly applied according to the standard dosage of 2 mg / cm 2 The protective liquid was allowed to stand until the film was completely formed; A non-woven fabric was used to reciprocate and rub on the surface of the test sample 20 times with a fixed pressure of 2 N. The measurement was carried out by a high-precision balance, and the percentage of the residual amount of the protective liquid film on the PMMA plate was calculated. The higher the percentage of the residual amount, the better the anti-smudging performance.

[0039] After the above tests were performed on test samples 1-9 and control samples 1-7, the test results were correspondingly recorded in Table 5.

[0040] Table 5 Test Results of Test Samples 1-9 and Control Samples 1-7 Combining Example 1 and Comparative Examples 1-7 and in conjunction with Table 5, it can be seen that by using a film-forming agent composed of pullulan, polyvinylpyrrolidone, and styrene / (meth)acrylate copolymer in combination, the present application can effectively improve the slow film formation of traditional pure water-based protective fluids, as well as the poor experiences of peeling, stickiness, and tightness after film formation, and the phenomenon of poor anti-smudging effect. The test results obtained from the above tests show significant progress. At the same time, if any one or two of pullulan, polyvinylpyrrolidone, and styrene / (meth)acrylate copolymer are applied to the eye anti-smudging pure water-based protective fluid, although it can bring a corresponding improvement in effect, the improvement amplitude is limited, and the combination between them can only bring a simple additive effect. Only when the three are used in combination can a significant improvement effect of 1+1>2 be brought, and thus a high-quality eye anti-smudging pure water-based protective fluid can be obtained.

[0041] Combining Example 1 and Examples 4-5 and in conjunction with Table 5, it can be seen that in the weight part composition of the film-forming agent, taking 2-5 parts of polyvinylpyrrolidone and 7-14 parts of styrene / (meth)acrylate copolymer can both exhibit excellent and stable application effects, and ultimately a high-quality and stable eye anti-smudging pure water-based protective fluid can be obtained.

[0042] Combining Example 1 and Examples 6-7 and in conjunction with Table 5, it can be seen that in the weight part composition of the thickener, taking 1-2 parts of PEG-240 / HDI copolymer bis-decyltetradecyl polyether-20 ether and 0.02-0.1 parts of xanthan gum can both play stable and excellent corresponding effect in the eye anti-smudging pure water-based protective fluid.

[0043] Combining Example 1 and Examples 8-9 and in conjunction with Table 5, it can be seen that the moisturizer is composed of a first moisturizing component, a second moisturizing component, and a third moisturizing component. The first moisturizing component is sodium hyaluronate, the second moisturizing component is 1,2-hexanediol, and the third moisturizing component is a mixture of 1,3-propanediol, caprylyl glycol, and ethylhexylglycerin. Ultimately, a high-quality and stable eye anti-smudging pure water-based protective fluid can be obtained.

[0044] This specific embodiment is only an explanation of the present application and is not a limitation thereof. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. An eye protection liquid in pure water form that prevents rubbing, characterized in that It is made from raw materials containing the following parts by weight: Water 50 - 70 parts; Thickener 1 - 2 parts; Pullulan 1 - 3 parts; Film-forming agent 9 - 19 parts; Humectant 1.35 - 1.8 parts; Opaque agent 0.5 - 1 part; The film-forming agent consists of polyvinylpyrrolidone and styrene / (meth)acrylate copolymer.

2. The pure water-based protective solution for preventing eye rubbing according to claim 1, wherein: The film-forming agent consists of the following components in parts by weight: Polyvinylpyrrolidone 2 - 5 parts; Styrene / (meth)acrylate copolymer 7 - 14 parts.

3. The aqueous pure-form protection liquid for preventing rubbing of eyes according to claim 1, characterized in that: The thickener is a composition of one or more of PEG - 240 / HDI copolymer bis - decyltetradecyl polyethylene glycol - 20 ether, xanthan gum, carrageenan, carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl starch phosphate.

4. The eye anti-smudging pure water-based protective liquid according to claim 3, wherein: The thickener consists of the following components in parts by weight: PEG - 240 / HDI copolymer bis - decyltetradecyl polyethylene glycol - 20 ether 1 - 2 parts; Xanthan gum 0.02 - 0.1 part.

5. The aqueous pure water type protective liquid for preventing eye rubbing according to claim 1, characterized in that: The humectant is a composition of one or more of sodium hyaluronate, 1,2 - hexanediol, 1,3 - propanediol, octyldecanol, and ethylhexylglycerin.

6. The aqueous pure water type protection liquid for preventing rubbing of eyes according to claim 5, characterized in that: The humectant consists of the following first humectant component, second humectant component, and third humectant component in parts by weight: First humectant component 0.05 - 0.1 part; Second humectant component 0.4 - 0.6 part; Third humectant component 0.9 - 1.1 parts; The first humectant component is sodium hyaluronate, the second humectant component is 1,2 - hexanediol, and the third humectant component is a mixture of 1,3 - propanediol, octyldecanol, and ethylhexylglycerin.

7. The aqueous pure water type protective liquid for preventing eye rubbing according to claim 1, characterized in that: The opaque agent is a composition of one or more of synthetic fluorophlogopite, natural mica powder, titanium dioxide, diatomaceous earth, talc powder, kaolin, and calcium carbonate.

8. The preparation method of the pure water-based protective solution for preventing eye rubbing according to any one of claims 1-7, characterized in that: It includes the following steps: (1) Prepare raw materials containing water, thickener, pullulan, film-forming agent, humectant, and opaque agent according to the ratio; (2) Premix the water, thickener, pullulan, polyvinylpyrrolidone, and the first humectant component in step (1), heat and stir, then cool, then add styrene / (meth)acrylate copolymer, stir, continue to add the second humectant component, the third humectant component, and the opaque agent, and stir again to obtain an eye anti-smudging pure water-based protective liquid.

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