Preservative composition for soft skin care product and application of preservative composition

Abstract

The invention provides a preservative composition for a soft skin care product and application of the preservative composition. The composition consists of the following components in percentage by weight: 0.3-1.0% of p-hydroxyacetophenone and 0.5-1.0% of phenoxyethanol. 0.3% to 0.8% of ethylhexylglycerin; 0.1% to 0.5% of potassium sorbate; 0.5%-1.0% of caprylyl glycol; and 0.05%-0.5% of sodium benzoate. Through reasonable proportioning of the components, the preservative composition has good safety and stability, achieves a mild and effective preservative effect, not only enhances the antibacterial ability of the preservative composition, but also has the effects of moisturizing and improving skin feeling, and is especially suitable for skin care products of sensitive skin.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and in particular to a preservative composition for mild skin care products and application thereof. Background Art

[0002] With the improvement of people's living standards and the enhancement of health awareness, consumers' demand for cosmetics, especially skin care products, continues to grow. Modern skin care products not only pursue basic functions such as moisturizing and cleaning, but also provide a variety of functions in anti-aging, brightening skin tone, soothing sensitivity, etc. Various types of skin care products are emerging in the market, covering lotions, creams, essences, etc. However, in order to ensure the safety and stability of skin care products and prevent microbial contamination and product deterioration, preservatives are usually added to the formula. The presence of preservatives can extend the shelf life of the product and ensure its effectiveness and safety during use.

[0003] Although preservatives are widely used in skin care products, some commonly used preservatives on the market, such as parabens and formaldehyde releasers, have been increasingly questioned and resisted due to their potential allergic, irritating and health risks. Some consumers, especially those with sensitive skin, prefer products that do not contain such preservatives. In addition, with the rise of the natural skin care trend, many brands have begun to reduce or even eliminate the use of traditional preservatives and instead look for milder, less allergenic alternatives. However, completely removing preservatives may lead to accelerated product deterioration, microbial contamination and other problems, thus affecting the safety and effectiveness of the product. Therefore, how to reduce the potential side effects of preservatives while maintaining product safety and stability has become a challenge facing the current skin care industry.

[0004] In order to cope with the risks and challenges brought by traditional preservatives, researchers have begun to work on developing a mild and efficient preservative composition that can reduce skin irritation and health risks while ensuring the stability and antibacterial ability of the product. Research directions include introducing preservative ingredients from natural sources, developing synergistic preservative systems, and reducing the amount of preservatives used. For example, by combining phenoxyethanol with mild preservatives such as ethylhexylglycerin and caprylyl glycol, the amount of phenoxyethanol can be effectively reduced while ensuring a broad-spectrum antibacterial effect. In addition, the growth environment of microorganisms can be reduced by improving the formulation technology of skin care products, such as adjusting the pH value of the product and controlling the water activity, thereby reducing dependence on preservatives. Through these technological innovations, more gentle, safe, and consumer-friendly skin care formulas can be developed.

[0005] Therefore, it is necessary to provide a preservative composition for gentle skin care products to solve the above problems. Summary of the invention

[0006] According to the technical problems raised above, a preservative composition for gentle skin care products and its application are provided. The present invention mainly utilizes the synergistic effect of p-hydroxyacetophenone, phenoxyethanol, ethylhexylglycerin, caprylyl glycol and other ingredients, and achieves a broad-spectrum antibacterial effect through a reasonable ratio, while reducing the amount of preservatives used, thereby effectively reducing skin irritation and allergy risks. The composition can not only inhibit the growth of bacteria, yeast and mold, but also has the function of moisturizing and improving skin feel, thereby improving the safety and mildness of skin care products, and is particularly suitable for use in sensitive skin care products.

[0007] The technical means adopted by the present invention are as follows:

[0008] A preservative composition for gentle skin care products is composed of the following components in percentage by weight: 0.3%-1.0% p-hydroxyacetophenone, 0.5%-1.0% phenoxyethanol, 0.3%-0.8% ethylhexylglycerin, 0.1%-0.5% potassium sorbate, 0.5%-1.0% caprylyl glycol, and 0.05%-0.5% sodium benzoate.

[0009] Furthermore, the composition is composed of the following components in weight percentage: 0.5%-0.8% p-hydroxyacetophenone, 0.6%-0.8% phenoxyethanol; 0.5% ethylhexylglycerin; 0.2%-0.4% potassium sorbate; 0.6%-0.9% caprylyl glycol; and 0.2%-0.3% sodium benzoate.

[0010] Furthermore, the above components are dissolved in an aqueous solvent containing ethanol, stirred evenly at 70-80° C., and the pH of the composition is adjusted to within the range of 4.5-6.0 using citric acid or sodium hydroxide.

[0011] The present invention also provides a use of the above-mentioned preservative composition for mild skin care products in the preparation of skin care products.

[0012] The present invention also provides a skin care product, which contains the preservative composition mentioned above, and the weight percentage of the preservative composition is 1.75%-4.8%.

[0013] Furthermore, the skin care product contains the following components in weight percentage: water 50%-85%; moisturizer 1.1%-10.5%; oil and emulsifier 4%-20%; active ingredient 1.2%-11%; thickener and regulator 0.7%-3.8%; citric acid 0.01%-0.2%; fragrance or fragrance substitute 0%-0.5%.

[0014] Furthermore, the moisturizing agent is selected from glycerin or sodium hyaluronate.

[0015] Furthermore, the oil and emulsifier are selected from one or a mixture of squalane, caprylic / capric triglyceride or glyceryl stearate.

[0016] Furthermore, the active ingredient is selected from niacinamide, vitamin C or vitamin E, or a mixture of the above.

[0017] Furthermore, the thickener and regulator are selected from one or a mixture of carbomer, xanthan gum or stearic acid.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The synergistic effect of p-hydroxyacetophenone and phenoxyethanol provides a strong broad-spectrum antibacterial effect in the preservative system. p-hydroxyacetophenone not only has good antibacterial properties, but also can enhance the preservative effect of phenoxyethanol. Through this combination, the amount of phenoxyethanol is reduced, thereby reducing its potential skin irritation, making the preservative system more gentle and suitable for sensitive skin.

[0020] 2. The combination of ethylhexylglycerin and caprylyl glycol not only further enhances the antibacterial ability, but also plays a role in moisturizing and improving skin feel. Ethylhexylglycerin can enhance the preservative effect of phenoxyethanol, while caprylyl glycol has the dual effects of moisturizing and antibacterial, making skin care products more moisturizing during use, not easy to dry, enhancing the protective function of the skin barrier, and effectively improving the comfort of skin care products.

[0021] 3. The combination of potassium sorbate and sodium benzoate is mainly used to inhibit the growth of mold and yeast. Potassium sorbate works best in an acidic environment, while sodium benzoate can maintain its preservative ability in a wide pH range, which allows the combination to function stably in different types of skin care products, further enhancing the broad spectrum and stability of the preservative system.

[0022] In summary, the present invention achieves a highly effective antiseptic effect through the synergistic effect of each component, while ensuring the mildness of the formula and reducing the risk of skin irritation and allergies. The composition provided by the present invention is suitable for various types of skin care products, especially for sensitive skin, can effectively extend the shelf life of the product, and improve the skin care experience, and has a wide range of application prospects. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The invention provides a preservative composition for gentle skin care products, which is composed of the following components in weight percentage: 0.3%-1.0% p-hydroxyacetophenone, 0.5%-1.0% phenoxyethanol, 0.3%-0.8% ethylhexylglycerol, 0.1%-0.5% potassium sorbate, 0.5%-1.0% caprylyl glycol, and 0.05%-0.5% sodium benzoate. The above components are dissolved in an aqueous solvent containing ethanol, fully stirred at 70-80°C, and the pH of the composition is adjusted to be within the range of 4.5-6.0 by using citric acid or sodium hydroxide.

[0025] The present invention also provides a skin care product, which contains the preservative composition mentioned above, and the weight percentage of the preservative composition is 1.75%-4.8%.

[0026] The skin care product contains the following components in percentage by weight: 50%-85% water; 1.1%-10.5% moisturizer, selected from glycerin or sodium hyaluronate; 4%-20% oil and emulsifier, selected from squalane, caprylic / capric triglyceride or glyceryl stearate or a mixture of one or more thereof; 1.2%-11% active ingredient, selected from niacinamide, vitamin C or vitamin E or a mixture of one or more thereof; 0.7%-3.8% thickener and regulator, selected from carbomer, xanthan gum or a mixture of one or more thereof; 0.01%-0.2% citric acid; 0%-0.5% fragrance or fragrance substitute, selected from synthetic fragrance or natural essential oil.

[0027] Example 1

[0028] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 0.5% p-hydroxyacetophenone, 0.7% phenoxyethanol, 0.5% ethylhexylglycerin, 0.2% potassium sorbate, 0.7% caprylyl glycol, and 0.3% sodium benzoate.

[0029] Example 2

[0030] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 0.8% p-hydroxyacetophenone, 1.0% phenoxyethanol, 0.8% ethylhexylglycerin, 0.3% potassium sorbate, 0.9% caprylyl glycol, and 0.1% sodium benzoate.

[0031] Example 3

[0032] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 0.7% p-hydroxyacetophenone, 0.6% phenoxyethanol, 0.3% ethylhexylglycerin, 0.4% potassium sorbate, 0.5% caprylyl glycol, and 0.5% sodium benzoate.

[0033] Example 4

[0034] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 0.3% p-hydroxyacetophenone, 0.8% phenoxyethanol, 0.7% ethylhexylglycerin, 0.1% potassium sorbate, 1.0% caprylyl glycol, and 0.2% sodium benzoate.

[0035] Comparative Example 1

[0036] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 1.2% p-hydroxyacetophenone, 0.4% phenoxyethanol, 0.9% ethylhexylglycerin, 0.6% potassium sorbate, 1.2% caprylyl glycol, and 0.6% sodium benzoate.

[0037] Comparative Example 2

[0038] The present invention provides a preservative composition for gentle skin care products, which is composed of the following components in percentage by weight: 0.2% p-hydroxyacetophenone, 1.5% phenoxyethanol, 0.1% ethylhexylglycerin, 0.05% potassium sorbate, 0.3% caprylyl glycol, and 0.01% sodium benzoate.

[0039] The following table summarizes the components of Examples 1-4 and Comparative Examples 1-2:

[0040] Components Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 p-Hydroxyacetophenone 0.50％ 0.80％ 0.70％ 0.30％ 1.20％ 0.20％ Phenoxyethanol 0.70％ 1.00％ 0.60％ 0.80％ 0.40％ 1.50％ Ethylhexylglycerin 0.50％ 0.80％ 0.30％ 0.70％ 0.90％ 0.10％ Potassium Sorbate 0.20％ 0.30％ 0.40％ 0.10％ 0.60％ 0.05％ Caprylyl Glycol 0.70％ 0.90％ 0.50％ 1.00％ 1.20％ 0.30％ Sodium Benzoate 0.30％ 0.10％ 0.50％ 0.20％ 0.60％ 0.01％

[0041] It can be seen from the above Examples 1-4 that the formulas of these Examples have good antiseptic effect and mildness within the range of each component, and are particularly suitable for sensitive skin.

[0042] Comparative Example 1: The concentrations of p-hydroxyacetophenone and phenoxyethanol exceeded the range, which may result in increased skin irritation.

[0043] Comparative Example 2: The dosage of sodium benzoate and ethylhexylglycerin is lower than the recommended range, which may result in insufficient preservative effect, and excessive phenoxyethanol may cause irritation.

[0044] Evaluation of anticorrosion performance:

[0045] The antiseptic performance of Examples 1-4 and Comparative Examples 1-2 was evaluated. <51> Antimicrobial efficacy test, conduct this preservation test.

[0046] Test strains:

[0047] Staphylococcus aureus (ATCC 6538)

[0048] Pseudomonas aeruginosa (ATCC 9027)

[0049] Aspergillus niger (ATCC 16404)

[0050] Escherichia coli (ATCC 25922)

[0051] Candida albicans (ATCC 10231)

[0052] Initial inoculum amount: Bacteria: 4.0×10^6CFU / g; Mold / yeast: 2.0×10^6CFU / g

[0053] Testing process:

[0054] 1. Sample preparation:

[0055] The composition samples of Examples 1-4 and Comparative Examples 1-2 were prepared and respectively placed in sterile containers.

[0056] 2. Strain inoculation:

[0057] According to USP 35 <51> According to the standard, the above strains were inoculated into each sample at the specified concentration to ensure that each bacterial species reached the required initial bacterial count.

[0058] 3. Time point detection:

[0059] After inoculation, the colonies in the samples were counted at 0 hours, 7 days, 14 days, and 28 days to detect the inhibitory or killing effects of the preservatives on the strains.

[0060] 4. Result judgment criteria (according to USP <51> standard):

[0061] Bacteria: The colony count was reduced by not less than 99.9% at 7 days and maintained or further reduced at 28 days.

[0062] Mold and yeast: The colony count was reduced by not less than 99.9% at 14 days and maintained or further reduced at 28 days.

[0063] The test results are as follows:

[0064]

[0065]

[0066] Result analysis:

[0067] Examples 1-4: All examples showed excellent antimicrobial efficacy in the antiseptic test, and were able to effectively inhibit the growth of bacteria, molds and yeasts within the specified time, in accordance with USP <51> requirements.

[0068] Comparative Examples 1 and 2: Due to improper ratio of components (too high or too low), the antiseptic effect is obviously insufficient, the growth of the strain cannot be effectively inhibited, and the antiseptic performance is unqualified.

[0069] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A preservative composition for gentle skin care products, characterized in that: The composition is composed of the following components in weight percentage: p-Hydroxyacetophenone 0.3%-1.0%, Phenoxyethanol 0.5%-1.0%; Ethylhexylglycerin 0.3%-0.8%; Potassium sorbate 0.1%-0.5%; Caprylyl glycol 0.5%-1.0%; And sodium benzoate 0.05%-0.5%.

2. The preservative composition for gentle skin care products according to claim 1, characterized in that: The composition is composed of the following components in weight percentage: p-Hydroxyacetophenone 0.5%-0.8%, Phenoxyethanol 0.6%-0.8%; Ethylhexylglycerin 0.5%; Potassium sorbate 0.2%-0.4%; Caprylyl glycol 0.6%-0.9%; And sodium benzoate 0.2%-0.3%.

3. The preservative composition for gentle skin care products according to claim 2, characterized in that: The above components are dissolved in a water solvent containing ethanol, stirred thoroughly and uniformly at 70-80° C., and the pH of the composition is adjusted to be within the range of 4.5-6.0 using citric acid or sodium hydroxide.

4. Use of the preservative composition for mild skin care products according to any one of claims 1 to 3 in the preparation of skin care products.

5. A skin care product, characterized in that: The skin care product contains the preservative composition according to any one of claims 1 to 3, and the weight percentage of the preservative composition is 1.75% to 4.8%.

6. The skin care product according to claim 5, characterized in that The skin care product contains the following components in percentage by weight: 50%-85% water; 1.1%-10.5% moisturizer; 4%-20% oil and emulsifier; 1.2%-11% active ingredient; 0.7%-3.8% thickener and regulator; 0.01%-0.2% citric acid; and 0%-0.5% fragrance or fragrance substitute.

7. The skin care product according to claim 6, characterized in that The moisturizing agent is selected from glycerin or sodium hyaluronate.

8. The skin care product according to claim 7, characterized in that The oil and emulsifier are selected from squalane, caprylic / capric triglyceride or glyceryl stearate or a mixture of the above.

9. The skin care product according to claim 8, characterized in that: The active ingredient is selected from niacinamide, vitamin C or vitamin E, or a mixture of the above.

10. The skin care product according to claim 9, characterized in that: The thickener and regulator are selected from carbomer, xanthan gum or stearic acid or a mixture of the above.

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