Stable sunscreen composition for sunscreen wet tissue, preparation method of stable sunscreen composition and sunscreen wet tissue

Abstract

The invention discloses a stable sunscreen composition for a sunscreen wet tissue. The stable sunscreen composition is prepared from the following components in percentage by mass: 5 to 7 percent of isoamyl methoxycinnamate, 1 to 3 percent of ethylhexyl triazinone, 12 to 16 percent of bis-ethylhexyloxyphenol methoxyphenyl triazine and the balance of solvent, the solvent is prepared from volatile silicone oil, butanediol and propylene glycol in a volume ratio of 1: (2-5): (0.1-0.6). By optimizing the ratio of the sun-screening agent and the solvent system, the problem of layering caused by precipitation of the sun-screening agent in the traditional sun-screening wet tissue is effectively solved. According to the composition, butanediol, propylene glycol and volatile silicone oil are adopted as a composite solvent, so that the solubility of the sun-screening agent and the compatibility of a wet tissue base material are remarkably improved, and it is ensured that the product is still kept uniform and stable after being stored for a long time. Titanium dioxide can be further added into the sunscreen composition to enhance the protection effect, and the sunscreen composition is suitable for outdoor sports scenes of men and children and has the advantages of being fresh, non-sticky and capable of achieving protection after being wiped.

Description

Technical Field

[0001] The invention belongs to the technical field of sunscreen products, and particularly relates to a stable sunscreen composition for sunscreen wipes, a preparation method thereof, and the sunscreen wipes. Background Art

[0002] With the increasing awareness of UV protection, the demand for sunscreen products is growing. Sunscreen wipes, as a convenient sunscreen product, are favored by consumers due to their ease of use and portability. However, existing sunscreen wipes still have some problems in actual use. For example, some sunscreens have poor solubility in solvents, which can lead to precipitation and stratification during storage, affecting product stability and effectiveness. Furthermore, some sunscreens have poor compatibility with the wipe substrate, preventing them from being evenly distributed on the wipe, which in turn affects the uniformity of the sunscreen effect. Furthermore, for people who spend extended periods outdoors, such as men and children exercising outdoors, existing sunscreen wipes often fail to provide sufficiently long-lasting and refreshing sunscreen protection, and can easily produce a sticky feeling, causing discomfort to the user. Therefore, it is of great practical significance to develop a sunscreen composition for sunscreen wipes that has good stability, good compatibility with the wipe substrate, good sunscreen effectiveness, and a refreshing, non-sticky feel. Summary of the Invention

[0003] The present invention aims to provide a stable sunscreen composition for sunscreen wipes. This composition significantly improves the solubility of the sunscreen and its compatibility with the wipe substrate, ensuring uniformity and stability even after long-term storage. It also offers a refreshing, non-sticky feel and immediate protection, making it particularly suitable for outdoor sports for men and children. Furthermore, the present invention provides a method for preparing the sunscreen composition and sunscreen wipes containing the composition.

[0004] A stable sunscreen composition for sunscreen wipes is composed of the following components in percentage by mass: 5-7% isoamyl methoxycinnamate, 1-3% ethylhexyl triazone, 12-16% bis-ethylhexyloxyphenol methoxyphenyl triazine, and the balance a solvent; the solvent is volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:(2-5):(0.1-0.6).

[0005] Optionally, the composition consists of the following components in the following mass percentages: 5.5-6.5% of isoamyl methoxycinnamate, 1.5-2.5% of ethylhexyl triazone, 13-15% of bis-ethylhexyloxyphenol methoxyphenyl triazine, and the balance of solvent.

[0006] Alternatively, the composition consists of the following components in the following mass percentages: 6% of isoamyl methoxycinnamate, 2% of ethylhexyl triazone, 14% of bis-ethylhexyloxyphenol methoxyphenyl triazine, and the balance of solvent.

[0007] Optionally, the composition further comprises 2-5% by mass of titanium dioxide.

[0008] Optionally, the solvent is volatile silicone oil, butylene glycol and propylene glycol in a volume ratio of 1:(3-4):(0.2-0.5).

[0009] Optionally, the solvent is volatile silicone oil, butylene glycol and propylene glycol in a volume ratio of 1:3.5:0.4.

[0010] Optionally, the volatile silicone oil is at least one of cyclopentasiloxane, cyclotetrasiloxane and cyclohexasiloxane.

[0011] A method for preparing the stable sunscreen composition for sunscreen wipes comprises the following steps: uniformly mixing the volatile silicone oil, butylene glycol, and propylene glycol to obtain a solvent; and uniformly mixing the isoamyl methoxycinnamate, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, and the solvent.

[0012] A sunscreen wet wipe comprises a wet wipe substrate and a stable sunscreen composition for the sunscreen wet wipe.

[0013] Optionally, the mass percentage of the stable sunscreen composition for sunscreen wipes is 80-90% of the sunscreen wipes.

[0014] Beneficial effects

[0015] The present invention achieves comprehensive protection against UVA and UVB by compounding three sunscreens: isoamyl methoxycinnamate, ethylhexyl triazone, and bis-ethylhexyloxyphenol methoxyphenyl triazine in specific proportions. At the same time, the innovative use of a composite solvent system composed of volatile silicone oil, butylene glycol, and propylene glycol significantly improves the solubility of the sunscreen, allowing the sunscreen to be evenly dispersed in the solvent, effectively avoiding the occurrence of precipitation and stratification, and ensuring the stability of the product after long-term storage. Moreover, the composite solvent system has good compatibility with the wet wipe base material, enabling the sunscreen to better adhere to the wet wipe and ensuring the uniformity of the sunscreen effect. The product has the characteristics of being refreshing and non-greasy after use, and is suitable for all skin types, especially for use during outdoor activities. DETAILED DESCRIPTION

[0016] One embodiment of the present invention provides a stable sunscreen composition for sunscreen wipes, comprising the following components in the following mass percentages: 5-7% isoamyl methoxycinnamate, 1-3% ethylhexyl triazone, 12-16% bis-ethylhexyloxyphenol methoxyphenyl triazine, and the remainder a solvent; the solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:(2-5):(0.1-0.6). Isoamyl methoxycinnamate, as a natural sunscreen, has excellent UV absorption properties, effectively absorbing both UVA and UVB. Compared to traditional chemical sunscreens, it is safer and less irritating. Ethylhexyl triazone is a highly effective, oil-soluble organic UV filter with strong UVB protection and excellent photostability. Bis-ethylhexyloxyphenol methoxyphenyl triazine is a broad-band UV absorber that absorbs both UVA and UVB and exhibits extremely high photostability. Combining these three sunscreens in specific ratios creates a synergistic sunscreen effect, providing more comprehensive UV protection. Furthermore, a composite solvent consisting of volatile silicone oil, butylene glycol, and propylene glycol in specific volume ratios is used. Butanediol, with its excellent moisturizing properties, forms a thin, breathable protective film on the skin's surface, helping it retain moisture and also possessing a certain antibacterial effect. Propylene glycol enhances user comfort, while the volatility of the volatile silicone oil creates a refreshing, non-greasy feel after use. Together, these three solvents significantly enhance the sunscreen's solubility and compatibility with the wipes' base material.

[0017] In some embodiments, a stabilized sunscreen composition for sunscreen wipes is composed of the following components in the following mass percentages: 5.5-6.5% isoamyl methoxycinnamate, 1.5-2.5% ethylhexyl triazone, 13-15% bis-ethylhexyloxyphenol methoxyphenyl triazine, and the remainder a solvent. These embodiments further optimize the mass percentage range of each sunscreen. Within this range, the synergistic effect between the three sunscreens is more pronounced, enabling more effective absorption of UV rays in different wavelengths, further enhancing the sunscreen effect. Furthermore, due to the fine-tuning of the proportions of the various ingredients, the solvent's solubility in the sunscreens and its compatibility with the wipes substrate are further enhanced, thereby better ensuring product stability and effectiveness.

[0018] Preferably, a stabilized sunscreen composition for sunscreen wipes is composed of the following components in the following mass percentages: 6% isoamyl methoxycinnamate, 2% ethylhexyl triazone, 14% bis-ethylhexyloxyphenol methoxyphenyl triazine, and the remainder solvent. In this case, the sunscreens have the optimal mass percentages. This ratio maximizes the synergistic effect between the sunscreens, providing the highest UV protection. Furthermore, the interaction between the solvent system, the sunscreens, and the wipe substrate is ideal, resulting in optimal product stability, uniform sunscreen effect, and a refreshing feel during use, providing users with a superior sunscreen experience.

[0019] In some embodiments, the composition further comprises 2-5% by weight of titanium dioxide. Titanium dioxide, as a physical sunscreen, synergizes with the existing chemical sunscreens isoamyl methoxycinnamate, ethylhexyl triazone, and bis-ethylhexyloxyphenol methoxyphenyl triazine, enhancing not only the reflection and scattering of ultraviolet rays, further improving the sunscreen effect, especially the protection against long-wave ultraviolet rays, but also improving the product's water resistance to a certain extent, allowing the product to maintain a good sunscreen effect even when exposed to sweat or rain during outdoor activities. In this case, the stabilized sunscreen composition for sunscreen wipes comprises the following components in the following weight percentages: 5-7% isoamyl methoxycinnamate, 1-3% ethylhexyl triazone, 12-16% bis-ethylhexyloxyphenol methoxyphenyl triazine, 2-5% titanium dioxide, and the remainder solvent; the solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:(2-5):(0.1-0.6). The addition of titanium dioxide can further enhance the protective effect and improve the sun protection performance of the composition.

[0020] Furthermore, the stable sunscreen composition for sunscreen wipes is composed of the following components in the following mass percentages: 6% of isoamyl methoxycinnamate, 2% of ethylhexyl triazone, 14% of bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% of titanium dioxide, and the balance of solvent.

[0021] In some embodiments, the solvent comprises volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:(3-4):(0.2-0.5). Within this range, the volatile silicone oil, butylene glycol, and propylene glycol cooperate more harmoniously, further improving the solubility of the sunscreen agent and the wettability of the wet wipe substrate. This results in better product stability during storage, more uniform distribution of the sunscreen agent on the wet wipe during use, and more reliable sun protection.

[0022] Optionally, the solvent comprises volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. This ratio maximizes the solvent system's solubility for the sunscreen, allowing it to fully dissolve and maintain stability. It also optimizes compatibility with the wet wipe substrate, ensuring the sunscreen adheres securely to the wipe and spreads evenly across the skin during use, providing users with stable, effective sun protection and a noticeably refreshing feel.

[0023] In some embodiments, the volatile silicone oil is at least one of cyclopentasiloxane, cyclotetrasiloxane, and cyclohexasiloxane. Cyclopentasiloxane, cyclotetrasiloxane, and cyclohexasiloxane have low surface tension, good volatility, and spreadability. When combined with a composite solvent system consisting of butylene glycol and propylene glycol, they can better dissolve the sunscreen and distribute it more evenly within the solvent. Furthermore, during use, these volatile silicone oils quickly spread to form a uniform film and then evaporate quickly, leaving no residue. This ensures the product's refreshing, non-greasy properties, further improves compatibility with the wet wipes substrate, and enhances the product's stability and effectiveness.

[0024] Another embodiment of the present invention provides a method for preparing the aforementioned stable sunscreen composition for sunscreen wipes, comprising the following steps: uniformly mixing volatile silicone oil, butylene glycol, and propylene glycol to obtain a solvent; and uniformly mixing isoamyl methoxycinnamate, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, and the solvent. This preparation method is simple and easy to operate. By first mixing the volatile silicone oil, butylene glycol, and propylene glycol to prepare the solvent, and then uniformly mixing the sunscreen agent with the solvent, it ensures that all components are thoroughly mixed, avoiding the problem of unstable product quality caused by uneven mixing. This preparation method is conducive to large-scale production and can ensure consistent quality across each batch of products, providing strong support for the product's market promotion and application.

[0025] Another embodiment of the present invention provides sunscreen wipes comprising a wipe substrate and the aforementioned stabilized sunscreen composition for sunscreen wipes. The sunscreen composition of the present invention is applied to sunscreen wipes, fully leveraging the advantages of the sunscreen composition. Sunscreen wipes combine the convenience and portability of wipes with the stable, highly effective sunscreen properties of the sunscreen composition, providing consumers with convenient, immediate sun protection in a variety of scenarios, including outdoor activities, travel, and daily commuting. This meets the dual demands of modern consumers for both convenience and effectiveness in sunscreen products.

[0026] Optionally, the mass percentage of the stable sunscreen composition for sunscreen wipes is 80-90%. Within this range, it can ensure that the sunscreen wipes have sufficient sunscreen content to provide effective sun protection, and the wet wipes substrate can maintain appropriate wetness and flexibility. The wipes will not be too wet or too hard due to excessive sunscreen composition, nor will the sun protection effect be affected due to too little content, making the product more comfortable and convenient during use, improving the user experience. Optionally, the mass percentage of the stable sunscreen composition for sunscreen wipes can be 80%, 82%, 84%, 85%, 87%, 89%, 90%, etc.

[0027] In some embodiments, the wet wipes substrate is at least one of cotton fiber and bamboo fiber.

[0028] Example 1

[0029] The stabilized sunscreen composition for sunscreen wipes in this embodiment is composed of the following components in the following weight percentages: 6% isoamyl methoxycinnamate, 2% ethylhexyl triazone, 14% bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% titanium dioxide, and the remainder a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. The volatile silicone oil is cyclopentasiloxane.

[0030] The preparation method of the stable sunscreen composition for sunscreen wipes in this embodiment is as follows: uniformly mix the various components of the solvent, and then uniformly mix isoamyl methoxycinnamate, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, titanium dioxide and the solvent to obtain the composition.

[0031] Example 2

[0032] Compared to Example 1, Example 2 differs in that the stabilized sunscreen composition for sunscreen wipes comprises the following components in the following weight percentages: 5.5% isoamyl methoxycinnamate, 2.5% ethylhexyl triazone, 15% bis-ethylhexyloxyphenol methoxyphenyl triazine, 2% titanium dioxide, and the remainder is a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3:0.2. The volatile silicone oil is cyclopentasiloxane.

[0033] Example 3

[0034] Compared to Example 1, Example 3 differs in that the stabilized sunscreen composition for sunscreen wipes is composed of the following components in the following weight percentages: 6.5% isoamyl methoxycinnamate, 1.5% ethylhexyl triazone, 13% bis-ethylhexyloxyphenol methoxyphenyl triazine, 5% titanium dioxide, and the remainder is a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:4:2.5. The volatile silicone oil is cyclopentasiloxane.

[0035] Example 4

[0036] Compared to Example 1, Example 4 differs in that the stabilized sunscreen composition for sunscreen wipes is composed of the following components in the following weight percentages: 5% isoamyl methoxycinnamate, 3% ethylhexyl triazone, 16% bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% titanium dioxide, and the remainder a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. The volatile silicone oil is cyclopentasiloxane.

[0037] Example 5

[0038] Compared to Example 1, Example 5 differs in that the stabilized sunscreen composition for sunscreen wipes is composed of the following components in the following weight percentages: 7% isoamyl methoxycinnamate, 1% ethylhexyl triazone, 12% bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% titanium dioxide, and the remainder is a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. The volatile silicone oil is cyclopentasiloxane.

[0039] Comparative Example 1

[0040] Compared to Example 1, Comparative Example 1 differs in that the composition comprises the following components in the following mass percentages: 3% isoamyl methoxycinnamate, 5% ethylhexyl triazone, 9% bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% titanium dioxide, and the remainder a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. The volatile silicone oil is cyclopentasiloxane.

[0041] Comparative Example 2

[0042] Compared to Example 1, Comparative Example 2 differs in that the composition comprises the following components in the following mass percentages: 10% isoamyl methoxycinnamate, 0.5% ethylhexyl triazone, 18% bis-ethylhexyloxyphenol methoxyphenyl triazine, 3% titanium dioxide, and the remainder is a solvent. The solvent is a volatile silicone oil, butylene glycol, and propylene glycol in a volume ratio of 1:3.5:0.4. The volatile silicone oil is cyclopentasiloxane.

[0043] Comparative Example 3

[0044] Compared with Example 1, Comparative Example 3 is different in that the solvent is cyclopentasiloxane.

[0045] Comparative Example 4

[0046] Compared with Example 1, Comparative Example 4 is different in that the cyclopentasiloxane in the solvent is replaced with butanediol of the same volume.

[0047] Comparative Example 5

[0048] Compared with Example 1, the difference in Comparative Example 5 is that the propylene glycol in the solvent is replaced with the same volume of butylene glycol.

[0049] Comparative Example 6

[0050] Compared with Example 1, Comparative Example 6 is different in that the butanediol in the solvent is replaced with butanediol of the same volume.

[0051] Test Case

[0052] The compositions in the examples and comparative examples were respectively prepared with the same cotton fibers into sunscreen wipes, and the mass percentage of the compositions in the sunscreen wipes was 85%.

[0053] (1) Each sunscreen wipe was sealed and stored at room temperature (25°C) for 2 months before removal. The precipitation of the composition from the cotton fibers was observed visually. The content of the sunscreen agent isoamyl methoxycinnamate before and after storage was determined by high performance liquid chromatography, and the retention rate was calculated. Retention rate = (content before storage - content after storage) / content before storage × 100%.

[0054] (2) Each sunscreen wipe was sealed and stored at 40°C for 2 months before removal. The precipitation of the composition from the cotton fibers was observed visually. The content of the sunscreen agent isoamyl methoxycinnamate before and after storage was determined using high performance liquid chromatography, and the retention rate was calculated. Retention rate = (content before storage - content after storage) / content before storage × 100%.

[0055] (3) The test was conducted according to the method for determining the sun protection factor (SPF) of sunscreen cosmetics in the "Safety Technical Specifications for Cosmetics" (2015 edition). Volunteers meeting the standards were selected and each sunscreen wipe was evenly applied to their backs. A solar simulator was used for irradiation, and the skin erythema reaction was measured using a dedicated instrument to calculate the SPF value.

[0056] (4) Compatibility test of the composition with the wet wipe substrate: observe whether the composition easily falls off from the wet wipe substrate during use.

[0057] (5) Recruit 30 volunteers to use each sunscreen wipe and rate the freshness of their skin 15 minutes, 30 minutes, and 60 minutes after use. The rating scale is: 1 point for very sticky, 2 points for sticky, 3 points for average, 4 points for relatively fresh, and 5 points for very fresh. The average score is used as the test result.

[0058]

[0059]

[0060] It can be seen from the above table that the sunscreen wipes in the examples have better storage stability, better sun protection effect, and are refreshing and non-greasy.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0062] For those skilled in the art, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A stable sunscreen composition for sunscreen wipes, characterized in that: The invention is composed of the following components in the following mass percentages: 5-7% of isoamyl methoxycinnamate, 1-3% of ethylhexyl triazone, 12-16% of bis-ethylhexyloxyphenol methoxyphenyl triazine and the balance of solvent; the solvent is volatile silicone oil, butylene glycol and propylene glycol in a volume ratio of 1:(2-5):(0.1-0.6).

2. The stable sunscreen composition for sunscreen wipes according to claim 1, wherein The invention is composed of the following components in the following mass percentages: 5.5-6.5% of isoamyl methoxycinnamate, 1.5-2.5% of ethylhexyl triazone, 13-15% of bis-ethylhexyloxyphenol methoxyphenyl triazine and the balance of solvent.

3. The stable sunscreen composition for sunscreen wipes according to claim 1, wherein The invention is composed of the following components in the following mass percentages: 6% of isoamyl methoxycinnamate, 2% of ethylhexyl triazone, 14% of bis-ethylhexyloxyphenol methoxyphenyl triazine and the balance of solvent.

4. The stable sunscreen composition for sunscreen wipes according to claim 1, wherein The composition further comprises titanium dioxide in an amount of 2-5% by mass.

5. The stable sunscreen composition for sunscreen wipes according to claim 1, wherein The solvent is volatile silicone oil, butylene glycol and propylene glycol in a volume ratio of 1:(3-4):(0.2-0.5).

6. The stable sunscreen composition for sunscreen wipes according to claim 1, wherein The solvent is volatile silicone oil, butylene glycol and propylene glycol in a volume ratio of 1:3.5:0.

4.

7. The stable sunscreen composition for sunscreen wipes according to any one of claims 1 to 6, characterized in that: The volatile silicone oil is at least one of cyclopentasiloxane, cyclotetrasiloxane and cyclohexasiloxane.

8. The method for preparing a stable sunscreen composition for sunscreen wipes according to any one of claims 1 to 7, wherein: The method comprises the following steps: uniformly mixing the volatile silicone oil, butylene glycol and propylene glycol to obtain a solvent; and uniformly mixing the isoamyl methoxycinnamate, the ethylhexyl triazone, the bis-ethylhexyloxyphenol methoxyphenyl triazine and the solvent.

9. A sunscreen wet wipe, characterized in that: The invention comprises a wet wipe substrate and a stable sunscreen composition for sunscreen wet wipes according to any one of claims 1 to 7.

10. The sunscreen wet wipes according to claim 9, wherein: The mass percentage of the stable sunscreen composition for sunscreen wet wipes is 80-90% of the sunscreen wet wipes.

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