An alcohol-free perfume and a method for preparing the same

Abstract

The present application relates to a kind of alcohol-free perfume and its preparation method, belong to daily chemical technology field.The perfume is composed of perfume composition and alcohol-free solvent matrix.The perfume composition front-tune includes distilled chamomile essential oil and levorotatory citronellol, middle tune includes the camphor-removed molecular distillation lavender essential oil, the sandalwood oil treated by antioxidation and iris neat oil, rear tune includes the cedarwood oil removed high-sensitization sesquiterpene by fractionation, benzoin and ambergris ether.Alcohol-free solvent matrix is compounded by caprylic acid / capric acid triglyceride, dipropylene glycol and ethylhexylglycerin.The present application constructs the perfume framework of synergistic low sensitivity by selecting and processing natural spices, and uses mild solvent, avoids the stimulation of alcohol and common allergens, realizes the high safety and friendliness to sensitive skin while guaranteeing excellent fragrance quality and persistent fragrance.

Description

Technical Field

[0001] This invention belongs to the field of daily chemical products technology, and relates to an alcohol-free perfume and its preparation method. Background Technology

[0002] Perfume is an aromatic product made with fragrance essence as its core, combined with solvents and auxiliary ingredients. It achieves personal scent modification, mood regulation, and atmosphere creation through the release of a long-lasting fragrance, and has become a widely used beauty and daily chemical product in modern life. Its core components typically include a fragrance essence composition that provides the aroma and a solvent matrix that carries the fragrance. The ratio of these two components and the selection of raw materials directly determine the fragrance's aroma, user experience, and target audience. As consumers' demands for personalized and multifunctional beauty products increase, the perfume market continues to expand. At the same time, the differences in usage needs among people with different skin types are becoming increasingly prominent, with sensitive skin groups having a particularly urgent need for gentle, low-irritation perfumes.

[0003] The irritation of traditional perfumes mainly comes from three core ingredients: high-concentration alcohol is the most common solvent. Although it can quickly dissolve fragrances and help the aroma evaporate, alcohol evaporates and takes away moisture from the skin's surface, damaging the skin barrier and causing discomfort such as dryness, redness, and stinging to sensitive skin; some synthetic fragrances have potential irritation risks. For example, some aldehyde fragrances, although they can give perfumes a fresh and bright top note, are prone to triggering skin allergic reactions. Phthalate fixatives may interfere with the endocrine system and have strong sensitizing properties; natural fragrances also contain unseparated potential sensitizing components, such as camphor in lavender essential oil and sesquiterpenes in cedarwood oil. These components can increase the burden on sensitive skin and trigger inflammatory reactions.

[0004] Current technologies still have significant shortcomings in the development of mild perfumes: some alcohol-free perfumes simply replace the solvent, neglecting the compatibility between the solvent and the fragrance, resulting in uneven fragrance release and short-lasting scent; the purification process of natural fragrances is not thorough enough, failing to effectively remove allergenic impurities, making it difficult to guarantee gentleness; the screening of synthetic fragrances lacks specificity, and a low-irritant fragrance library suitable for sensitive skin has not been established, with some products neglecting gentleness in pursuit of fragrance complexity; the formulation design of solvent bases is not scientific enough, lacking a combination of ingredients with moisturizing, soothing, and antibacterial effects, making it difficult to compensate for the fragile barrier of sensitive skin and simultaneously meet the core requirements of "mild and non-irritating" and "stable and long-lasting fragrance". Summary of the Invention

[0005] The purpose of this invention is to provide an alcohol-free perfume and its preparation method, which achieves low-irritation alcohol-free perfume and its preparation method through innovative fragrance structure and mild solvent system.

[0006] The objective of this invention can be achieved through the following technical solutions: An alcohol-free fragrance, comprising the following components by weight percentage: 10-20% fragrance composition; 80-90% alcohol-free solvent matrix; The fragrance composition comprises top notes, middle notes, and base notes; the top notes contain distilled chamomile essential oil and L-citronellol; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether.

[0007] As a preferred embodiment of the present invention, the mass ratio of the top note fragrance, middle note fragrance and base note fragrance is 20-30:40-50:20-30.

[0008] As a preferred embodiment of the present invention, the mass ratio of distilled chamomile essential oil to L-citronellol in the pre-note fragrance is 8.5-9.5:0.5-1.5.

[0009] As a preferred embodiment of the present invention, in the middle notes of the fragrance, the mass ratio of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil and iris absolute oil is 4-6:2-4:1-3.

[0010] As a preferred embodiment of the present invention, in the base fragrance, the mass ratio of fractionated cedarwood oil, benzoin resin and ambergris ether is 3-5:3-5:1-3.

[0011] As a preferred embodiment of the present invention, the alcohol-free solvent matrix is ​​composed of caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin.

[0012] As a preferred embodiment of the present invention, the mass ratio of caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin in the alcohol-free solvent matrix is ​​70-80:15-25:0.5-1.5.

[0013] Furthermore, a method for preparing the alcohol-free perfume includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and carry out short-path distillation under conditions of 100-150℃ and pressure below 1.0 Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.01%-0.05% of vitamin E by weight to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to vacuum fractionation. Under a system pressure of 0.1-0.5 kPa, the main fraction with a boiling range of 125-140℃ is collected and the cedarwood oil is fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized under light-protected conditions at 15-25°C and aged for 5-10 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) Mix the fragrance composition obtained in step (4) with the alcohol-free solvent matrix obtained in step (5), and homogenize it for 3-10 minutes at a speed of 2000-4000 rpm using a shear emulsifier. After filtration, the product is obtained.

[0014] As a preferred embodiment of the present invention, the camphor content of the molecularly distilled lavender essential oil in step (1) is less than 0.1%.

[0015] As a preferred technical solution of the present invention, the content of sesquiterpenes in the fractionated cedarwood oil in step (3) is less than 10%.

[0016] In this application, chamomile essential oil is extracted by steam distillation, avoiding solvent residue. One of its main active ingredients is bisabolol, which has significant anti-inflammatory, soothing and skin barrier repair capabilities. When combined with citronellol, it produces a refreshing citrus-floral top note. The middle notes of the fragrance consist of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute. The lavender essential oil, through molecular distillation, selectively removes monoterpenoid ketones (such as camphor) with high molecular weight, poor skin permeability, and a tendency to cause allergies, while retaining safe soothing components such as linalyl acetate. Precious components in sandalwood (such as α-santalol) are easily oxidized in the air to generate peroxides and aldehydes, creating new irritants. By adding trace amounts of vitamin E and using nitrogen protection, free radical chain reactions are blocked, maintaining the chemical stability and mildness of the sandalwood oil itself, ensuring that its deep woody aroma does not transform into an irritant. Iris absolute, with its powdery and sweet floral notes, forms the core of the fragrance. The three are blended in a specific ratio, creating a velvety transition in the aroma. The base notes are composed of fractionated cedarwood oil, benzoin resin, and ambergris ether. By fractionating the cedarwood oil under reduced pressure, most of the high molecular weight sesquiterpenes are removed. These large molecules are not only common allergens but also have a dull aroma. Benzoin resin is mainly composed of benzoate esters, which have natural antibacterial and mild occlusive properties. It can not only act as a natural fixative to prolong the overall fragrance time but also form a protective film on the skin surface to reduce moisture loss and buffer external irritants. Ambergris ether, as a substitute for natural ambergris, provides a long-lasting and warm animalic base note.

[0017] To address the problems caused by alcohol, this invention develops a novel solvent matrix. Caprylic / capric triglycerides, derived from coconut oil, are excellent skin-compatible oils with a structure similar to human sebum, providing a refreshing, non-sticky feel. They can dissolve various natural fragrance components while also providing moisturizing effects. Dipropylene glycol, a high-boiling-point, mild polyol, combines moisturizing and solubilizing functions. It is miscible with both water and oil, helping to harmonize the hydration environment of oil-soluble fragrances with the skin's surface, promoting a gentler, slower release of aroma and avoiding the volatile impact of alcohol. Ethylhexylglycerin, in addition to acting as a mild preservative and enhancer, can reduce the binding force between fragrance molecules and skin proteins, further reducing potential allergenicity from a mechanistic perspective, and enhancing the clarity of the aroma.

[0018] The beneficial effects of this invention are: (1) This invention completely eliminates alcohol components and uses an alcohol-free solvent matrix composed of caprylic / capric triglyceride, dipropylene glycol and plant-derived ethylhexylglycerin. All solvent components have excellent skin compatibility. Among them, caprylic / capric triglyceride is similar to human sebum structure, and dipropylene glycol is gentle and moisturizing, which can avoid dryness, redness and stinging caused by alcohol evaporation, while providing moisturizing protection for sensitive skin. The fragrance composition undergoes targeted purification processes. Molecular distillation of lavender essential oil removes camphor, which is prone to causing allergies, while vacuum distillation of cedarwood oil eliminates most of the allergenic sesquiterpenes. Sandalwood oil is treated with added vitamin E and nitrogen-sealed to prevent oxidation and the formation of irritants. Furthermore, the distilled chamomile essential oil in the top notes contains bisabolol, and the molecularly distilled lavender essential oil in the middle notes retains linalyl acetate, both of which have anti-inflammatory, soothing, and skin barrier repair effects. Combined with ethylhexylglycerin, it reduces the binding force between the fragrance and skin proteins. From raw material selection and impurity removal to mechanism regulation, the risk of allergies is reduced from multiple dimensions, making it safe for sensitive skin to use.

[0019] (2) The fragrance composition of this invention adopts a scientific top, middle and base note ratio. The top note is a blend of distilled chamomile essential oil and L-citronellol to present a fresh citrus-floral scent. The middle note is a blend of molecularly distilled lavender essential oil, stabilized sandalwood oil and iris absolute to form a velvety transition of warm fragrance. The base note is a blend of fractionated cedarwood oil, benzoin resin and ambergris ether to bring a long-lasting and warm base. The fragrance layers are distinct and naturally connected. In the solvent matrix, dipropylene glycol works synergistically with caprylic / capric triglycerides to release the fragrance in a gentle and slow manner, avoiding the volatile impact of alcohol and improving the user experience. At the same time, benzoin resin, as a natural fixative, combined with the high boiling point of the solvent, effectively prolongs the fragrance time, solving the problem of short fragrance retention in traditional alcohol-free perfumes and achieving a unity of mildness and non-irritation with a long-lasting and elegant fragrance. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0021] Example 1 An alcohol-free fragrance, comprising the following components by weight percentage: 15% fragrance composition; 85% alcohol-free solvent matrix; The fragrance composition comprises top notes, middle notes, and base notes; the top notes contain distilled chamomile essential oil and L-citronellol; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether.

[0022] The mass ratio of the top note fragrance, middle note fragrance, and base note fragrance is 25:50:25.

[0023] In the top fragrance, the mass ratio of distilled chamomile essential oil to L-citronellol is 9:1.

[0024] In the middle notes of the fragrance, the mass ratio of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute is 5:3:2.

[0025] In the base fragrance, the mass ratio of fractionated cedarwood oil, benzoin resin and ambergris ether is 4:4:2.

[0026] The alcohol-free solvent matrix consists of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin.

[0027] In the alcohol-free solvent matrix, the mass ratio of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is 75:20:1.

[0028] A method for preparing the alcohol-free perfume includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and perform short-path distillation at a temperature of 120°C and a pressure of 0.8Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.03% of its mass of vitamin E to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to reduced pressure fractionation. Under a system pressure of 0.3 kPa, the fraction with a boiling range of 125-140℃ is collected and the cedarwood oil is fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized under light-protected conditions at 20°C and aged for 8 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) The fragrance composition obtained in step (4) is mixed with the alcohol-free solvent matrix obtained in step (5), and homogenized at 300 rpm for 6 minutes using a shear emulsifier. After filtration, the product is obtained.

[0029] The camphor content of the molecularly distilled lavender essential oil in step (1) is less than 0.07%.

[0030] The fractionated cedarwood oil in step (3) contains less than 6.5% sesquiterpenes.

[0031] Example 2 An alcohol-free fragrance, comprising the following components by weight percentage: 12% fragrance composition; 88% alcohol-free solvent matrix; The fragrance composition comprises top notes, middle notes, and base notes; the top notes contain distilled chamomile essential oil and L-citronellol; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether.

[0032] The mass ratio of the top note fragrance, middle note fragrance, and base note fragrance is 20:50:30.

[0033] In the top fragrance, the mass ratio of distilled chamomile essential oil to L-citronellol is 8.5:1.5.

[0034] In the middle notes of the fragrance, the mass ratio of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute is 4:4:2.

[0035] In the base fragrance, the mass ratio of fractionated cedarwood oil, benzoin resin and ambergris ether is 3:5:2.

[0036] The alcohol-free solvent matrix consists of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin.

[0037] In the alcohol-free solvent matrix, the mass ratio of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is 75:23.5:1.5.

[0038] A method for preparing the alcohol-free perfume includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and perform short-path distillation at a temperature of 100°C and a pressure of 1.0 Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.01% of its mass of vitamin E to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to reduced pressure fractionation. The fraction with a boiling range of 125-140℃ is collected under a system pressure of 0.1 kPa. The cedarwood oil is then fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized at 15°C in the dark and aged for 5 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) The fragrance composition obtained in step (4) is mixed with the alcohol-free solvent matrix obtained in step (5), and homogenized for 3 minutes at 2000 rpm using a shear emulsifier. After filtration, the product is obtained.

[0039] The camphor content of the molecularly distilled lavender essential oil in step (1) is 0.09%.

[0040] The fractionated cedarwood oil in step (3) has a sesquiterpene content of 9.2%.

[0041] Example 3 An alcohol-free fragrance, comprising the following components by weight percentage: 20% fragrance composition; 80% alcohol-free solvent matrix; The fragrance composition comprises top notes, middle notes, and base notes; the top notes contain distilled chamomile essential oil and L-citronellol; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether.

[0042] The mass ratio of the top note fragrance, middle note fragrance, and base note fragrance is 25:45:30.

[0043] In the top fragrance, the mass ratio of distilled chamomile essential oil to L-citronellol is 9.5:0.5.

[0044] In the middle notes of the fragrance, the mass ratio of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute is 6:2:2.

[0045] In the base fragrance, the mass ratio of fractionated cedarwood oil, benzoin resin and ambergris ether is 5:4:1.

[0046] The alcohol-free solvent matrix consists of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin.

[0047] In the alcohol-free solvent matrix, the mass ratio of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is 80:19:1.

[0048] A method for preparing the alcohol-free perfume includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and perform short-path distillation at a temperature of 150°C and a pressure of 0.6 Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.05% of its mass of vitamin E to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to reduced pressure fractionation. The fraction with a boiling range of 125-140℃ is collected under a system pressure of 0.1 kPa. The cedarwood oil is then fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized at 25°C in the dark and aged for 10 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) Mix the fragrance composition obtained in step (4) with the alcohol-free solvent matrix obtained in step (5), and homogenize it for 3-10 minutes at a speed of 2000-4000 rpm using a shear emulsifier. After filtration, the product is obtained.

[0049] The camphor content of the molecularly distilled lavender essential oil in step (1) is 0.05%.

[0050] The fractionated cedarwood oil in step (3) has a sesquiterpene content of 5.7%.

[0051] Example 4 An alcohol-free fragrance, comprising the following components by weight percentage: 20% fragrance composition; 80% alcohol-free solvent matrix; The fragrance composition comprises top notes, middle notes, and base notes; the top notes contain distilled chamomile essential oil and L-citronellol; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether.

[0052] The mass ratio of the top note fragrance, middle note fragrance, and base note fragrance is 25:50:25.

[0053] In the top fragrance, the mass ratio of distilled chamomile essential oil to L-citronellol is 9:1.

[0054] In the middle notes of the fragrance, the mass ratio of molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute is 5:3:2.

[0055] In the base fragrance, the mass ratio of fractionated cedarwood oil, benzoin resin and ambergris ether is 4:4:2.

[0056] The alcohol-free solvent matrix consists of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin.

[0057] In the alcohol-free solvent matrix, the mass ratio of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is 75:20:1.

[0058] A method for preparing the alcohol-free perfume includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and perform short-path distillation at a temperature of 120°C and a pressure of 0.8Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.03% of its mass of vitamin E to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to reduced pressure fractionation. Under a system pressure of 0.3 kPa, the fraction with a boiling range of 125-140℃ is collected and the cedarwood oil is fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized under light-protected conditions at 20°C and aged for 8 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) The fragrance composition obtained in step (4) is mixed with the alcohol-free solvent matrix obtained in step (5), and homogenized at 300 rpm for 6 minutes using a shear emulsifier. After filtration, the product is obtained.

[0059] The camphor content of the molecularly distilled lavender essential oil in step (1) is less than 0.07%.

[0060] The fractionated cedarwood oil in step (3) contains less than 6.5% sesquiterpenes.

[0061] Comparative Example 1 Based on Example 1, step (1) molecular distillation of lavender essential oil is omitted, and the rest remains the same as in Example 1.

[0062] Comparative Example 2 Based on Example 1, step (2) of oxidative stability treatment of sandalwood oil is omitted, and the rest is consistent with Example 1.

[0063] Comparative Example 3 Based on Example 1, step (3) of the cedarwood oil fractionation process is omitted, and the rest remains the same as in Example 1.

[0064] Comparative Example 4 Based on Example 1, the alcohol-free solvent matrix was replaced with caprylic / capric triglyceride and dipropylene glycol in a mass ratio of 75:21, while the rest remained the same as in Example 1.

[0065] Comparative Example 5 Based on Example 1, the alcohol-free solvent matrix was replaced with caprylic / capric triglyceride and ethylhexylglycerin in a mass ratio of 75:21, while the rest remained the same as in Example 1.

[0066] Comparative Example 6 Based on Example 1, the alcohol-free solvent matrix was replaced with dipropylene glycol and ethylhexylglycerin in a mass ratio of 60:36, while the rest remained the same as in Example 1.

[0067] Comparative Example 7 Based on Example 1, the alcohol-free solvent mechanism was replaced with a 95% concentration ethanol solution, while the rest remained the same as in Example 1.

[0068] Comparative Example 8 Based on Example 1, the mass ratio of top note fragrance, middle note fragrance and base note fragrance was changed to 50:20:30, and the rest remained the same as in Example 1.

[0069] Comparative Example 9 Based on Example 1, the mass ratio of top note fragrance, middle note fragrance and base note fragrance was changed to 20:30:50, while the rest remained the same as in Example 1.

[0070] Comparative Example 10 Based on Example 1, benzoin resin was not added to the base fragrance, but the rest remained the same as in Example 1.

[0071] Performance testing: Irritation: Forty-two volunteers with sensitive skin were recruited and randomly divided into 14 groups of 3 people each. Samples were prepared according to the "Cosmetic Safety Technical Specifications" for both the test examples and comparative examples. The test method was to take 0.1 mL of sample and apply it evenly to the inside of the arm twice a day for 21 consecutive days. The test site was visually evaluated, and phenomena such as erythema, edema, and desquamation were recorded on a scale of 0-4. The volunteers' subjective feelings were also recorded. Using a patch applicator, approximately 0.02 g / mL of sample solution was injected into the applicator chamber and applied to the normal skin on the back of the volunteer for 48 hours. 48 hours after removing the patch applicator, the skin reaction grade (0-4 points) was observed and recorded.

[0072] Aroma: A professional aroma evaluation team (5 people) will conduct blind evaluations of the samples in a standard aroma evaluation room. The evaluation will be based on aroma quality (richness, harmony, naturalness, absence of off-odors), changes in the three notes (whether the aroma characteristics of the top, middle and base notes are obvious and whether the transition is natural and smooth) and longevity (0.1 mL of sample is evenly applied to smelling paper and smelled regularly (e.g., 1, 2, 4, 8, 12, 24 hours), and the duration and intensity of the aroma are recorded until the aroma disappears).

[0073] The test results show that all examples exhibited extremely low skin irritation (irritation index <0.2), which is significantly better than comparative examples 1-3 using untreated raw materials (irritation index 0.45-0.85).

[0074] Comparative examples and Comparative Examples 8 and 9 show that a specific ratio of top, middle, and base notes is key to ensuring a harmonious and rich aroma while maintaining low irritation. An imbalance in the ratio can lead to a decline in both sensory experience and safety.

[0075] Comparative Example 10 demonstrates that benzoin resin, as a natural fixative, is crucial for achieving long-lasting fragrance, and its absence directly leads to a significant reduction in fragrance duration.

[0076] Comparative Examples 4-7 demonstrate the necessity and superiority of alcohol-free solvent bases. The contrast between Example 1 and Comparative Example 7 (alcohol base) is the most striking: with comparable aroma quality and lasting time, the alcohol base is more than 10 times more irritating than Comparative Example 1 and cannot be used on sensitive skin.

[0077] Comparative Examples 4-6 demonstrate that the matrix system consisting of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is indispensable. The absence of any one component will negatively impact skin feel, stability, or allergenicity, thereby affecting the overall performance and safety of the product.

[0078] The embodiments of this invention not only far surpass all comparative examples in terms of safety, but also reach the level of traditional high-end perfumes in terms of fragrance quality and lasting time (score > 8.5, lasting time > 12 hours), successfully solving the dilemma of not being able to achieve both safety and pleasant smell in perfumes for sensitive skin.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An alcohol-free perfume, characterized in that, It consists of the following components by mass percentage: 10-20% fragrance composition; 80-90% alcohol-free solvent matrix; The alcohol-free solvent matrix is ​​composed of caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin; The fragrance composition consists of top notes, middle notes, and base notes in a mass ratio of 20-30:40-50:20-30. The top notes contain distilled chamomile essential oil and L-citronellol in a mass ratio of 8.5-9.5:0.5-1.5; the middle notes contain molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, and iris absolute in a mass ratio of 4-6:2-4:1-3; and the base notes contain fractionated cedarwood oil, benzoin resin, and ambergris ether in a mass ratio of 3-5:3-5:1-3. The method for preparing the molecularly distilled lavender essential oil involves placing the lavender essential oil in a molecular distillation apparatus and performing short-path distillation at a vessel temperature of 100-150℃ and a pressure below 1.0 Pa, collecting the light fraction to obtain the lavender essential oil. The method for preparing the oxidatively stabilized sandalwood oil is to add 0.01%-0.05% of vitamin E by mass to the sandalwood oil, stir thoroughly until completely dissolved, and then seal the container with nitrogen to obtain the product. The method for preparing the fractionated cedarwood oil is to perform vacuum fractionation on the cedarwood oil, and collect the fraction with a boiling range of 125-140℃ under a system pressure of 0.1-0.5 kPa.

2. The alcohol-free perfume according to claim 1, characterized in that, In the alcohol-free solvent matrix, the mass ratio of caprylic / capric triglyceride, dipropylene glycol, and ethylhexylglycerin is 70-80:15-25:0.5-1.

5.

3. A method for preparing an alcohol-free perfume as described in any one of claims 1-2, characterized in that, Includes the following steps: (1) Place lavender essential oil in a molecular distillation apparatus and carry out short-path distillation under conditions of 100-150℃ and pressure below 1.0 Pa. Collect the light fraction to obtain molecularly distilled lavender essential oil. (2) Add 0.01%-0.05% of vitamin E by weight to sandalwood oil, stir thoroughly until completely dissolved, and seal the container with nitrogen to obtain sandalwood oil after oxidation stabilization treatment; (3) The cedarwood oil is subjected to reduced pressure fractionation. The fraction with a boiling range of 125-140℃ is collected under a system pressure of 0.1-0.5 kPa. The cedarwood oil is then fractionated. (4) Distilled chamomile essential oil, L-citronellol, molecularly distilled lavender essential oil, oxidatively stabilized sandalwood oil, iris essential oil, fractionated cedarwood oil, benzoin resin and ambergris ether are mixed, stirred and homogenized under light-protected conditions at 15-25°C and aged for 5-10 days to obtain the fragrance composition. (5) Mix caprylic / capric triglyceride, dipropylene glycol and ethylhexylglycerin evenly to obtain an alcohol-free solvent matrix; (6) Mix the fragrance composition obtained in step (4) with the alcohol-free solvent matrix obtained in step (5), and homogenize it for 3-10 minutes at a speed of 2000-4000 rpm using a shear emulsifier. After filtration, the product is obtained.

4. The method for preparing alcohol-free perfume according to claim 3, characterized in that, The camphor content of the molecularly distilled lavender essential oil in step (1) is less than 0.1%.

5. The method for preparing alcohol-free perfume according to claim 3, characterized in that, The fractionated cedarwood oil in step (3) contains less than 10% sesquiterpenes.

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