Fragrance compositions and their preparation methods, car fragrances

Abstract

This application relates to a fragrance composition and its preparation method, as well as a car fragrance. The fragrance composition, by weight percentage, comprises the following components: 55%-70% isoparaffin solvent, 10%-25% volatility regulator, 5%-20% fragrance, and 2%-5% deodorizer; wherein the isoparaffin solvent has a flash point greater than 80°C. The solution provided in this application, by using a high-flash-point isoparaffin solvent as the main component, combined with a specific proportion of volatility regulator, fragrance, and deodorizer, effectively avoids flammability risks while ensuring the stability and long-lasting deodorizing effect of the fragrance composition, resulting in a fragrance with excellent safety, stability, and deodorizing effect during use.

Description

Technical Field

[0001] This application relates to the field of fragrance technology, and in particular to a fragrance composition and its preparation method, and a car fragrance. Background Technology

[0002] Air fresheners and car fragrance products eliminate or mask odors by continuously releasing fragrance, thereby improving the comfort of the space and effectively improving the smell of enclosed spaces.

[0003] Existing fragrance products are generally water-based solvent systems or solid fragrances. Water-based solvent systems use deionized water as the main dispersion medium, but they have poor anti-corrosion properties and poor environmental adaptability. In particular, they are prone to phase separation, failure, or deterioration after high and low temperature cycles or long-term storage. Solid fragrances mainly rely on physical adsorption to remove odor molecules, but they are prone to dust pollution during use. Especially in high-temperature environments, the adsorbed odor molecules may be released again, causing secondary pollution. Summary of the Invention

[0004] To address or partially address the problems existing in related technologies, this application provides a fragrance composition and its preparation method, as well as a car fragrance. By using a high-flash-point isoparaffin solvent as the main component, combined with a specific ratio of volatility regulators, fragrances, and deodorizers, the flammability risk is effectively avoided, while ensuring the stability and long-lasting deodorizing effect of the fragrance composition. This results in the fragrance having excellent safety, stability, and deodorizing effect during use.

[0005] The first aspect of this application provides a fragrance composition, which, by weight percentage, comprises the following components: 55%-70% isoparaffin solvent, 10%-25% volatility modifier, 5%-20% fragrance, and 2%-5% deodorant; wherein the isoparaffin solvent has a flash point greater than 80°C.

[0006] In conjunction with the first aspect, in one possible implementation of the first aspect, the isoalkane solvent is isododecane.

[0007] In conjunction with the first aspect, in one possible implementation of the first aspect, the volatility modifier is dipropylene glycol methyl ether.

[0008] In conjunction with the first aspect, in one possible implementation of the first aspect, the flash point of the fragrance composition is greater than 65°C.

[0009] In conjunction with the first aspect, in one possible implementation of the first aspect, the deodorant is a liquid deodorant comprising a compound active ingredient; wherein the compound active ingredient comprises at least one or more of forsythia fruit extract, fig extract, ginkgo nut extract, osmanthus flower extract, and red pine bark extract, and the compound active ingredient is capable of reacting with one or more of ammonia, hydrogen sulfide, nicotine, and formaldehyde.

[0010] In conjunction with the first aspect, in one possible implementation of the first aspect, the isoparaffin solvent: volatile modifier: fragrance: deodorant = 60%: 22%: 15%: 3% by weight percentage.

[0011] In conjunction with the first aspect, in one possible implementation of the first aspect, the fragrance composition, under normal temperature and atmospheric pressure conditions, achieves a removal rate of more than 90% for at least one gaseous substance among ammonia, hydrogen sulfide, and nicotine within 24 hours.

[0012] In conjunction with the first aspect, in one possible implementation of the first aspect, the fragrance composition, under normal temperature and atmospheric pressure conditions, achieves a removal rate of more than 90% for at least one gaseous substance among ammonia, hydrogen sulfide, and nicotine within 24 hours.

[0013] The second aspect of this application provides a method for preparing a fragrance composition, the method comprising the following steps: S1: stirring the isoparaffin solvent and the volatility regulator at a first preset temperature until they are mixed evenly to obtain a first solvent; S2: adding the fragrance to the first solvent and stirring at a second preset temperature until they are mixed evenly to obtain a second solvent; S3: adding the deodorant to the second solvent and stirring at a third preset temperature until they are mixed evenly to obtain the fragrance composition.

[0014] In conjunction with the second aspect, in one possible implementation of the second aspect, after step S3, the method further includes: aging the fragrance composition at a fourth preset temperature; wherein the aging process lasts for 12-48 hours.

[0015] A third aspect of this application provides a car fragrance, comprising any of the fragrance compositions described above.

[0016] The technical solution provided in this application may include the following beneficial effects: This application discloses a fragrance composition and its preparation method, as well as a car fragrance. The fragrance composition, by weight percentage, comprises the following components: 55%-70% isoparaffin solvent, 10%-25% volatility regulator, 5%-20% fragrance, and 2%-5% deodorizer. The isoparaffin solvent has a flash point greater than 80°C. By using a high-flash-point isoparaffin solvent as the main component, combined with a specific proportion of volatility regulator, fragrance, and deodorizer, the flammability risk is effectively avoided, while ensuring the stability and long-lasting deodorizing effect of the fragrance composition. This results in a fragrance with excellent safety, stability, and deodorizing effect during use.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0018] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] Air fresheners and car fragrance products eliminate or mask odors by continuously releasing fragrance, thereby improving the comfort of the space and effectively improving the smell of enclosed spaces.

[0022] Existing fragrance products are generally classified as alcohol-based, water-based, or solid fragrances. Water-based systems use deionized water as the main dispersion medium, but they have poor corrosion resistance and environmental adaptability, and are prone to deterioration and degradation, especially after being stored at different temperatures. Alcohol-based systems use low-molecular-weight alcohols such as ethanol or isopropanol as the main solvent, relying on their good solubility and high volatility to achieve rapid fragrance diffusion. However, due to their low flash point, they are highly susceptible to flammability and explosion in high-temperature, enclosed environments, and the rapid evaporation rate prevents the fragrance and deodorizing effect from being maintained for long. Solid fragrances mainly rely on physical adsorption to remove odor molecules, but they are prone to generating dust pollution during use, especially in high-temperature environments, where adsorbed odor molecules may be released again, causing secondary pollution.

[0023] To address the aforementioned issues, this application provides a fragrance composition and its preparation method, as well as a car fragrance. By using a high-flash-point isoparaffin solvent as the main component, combined with a specific ratio of volatility regulators, fragrances, and deodorizers, the flammability risk is effectively avoided, while ensuring the stability and long-lasting deodorizing effect of the fragrance composition. This results in a fragrance with excellent safety, stability, and deodorizing effect during use.

[0024] The present invention provides a fragrance composition comprising, by weight percentage: 55%-70% isoparaffin solvent, 10%-25% volatility modifier, 5%-20% fragrance, and 2%-5% deodorant; wherein the isoparaffin solvent has a flash point greater than 80°C.

[0026] Specifically, the isoparaffin solvent is a hydrocarbon solvent composed of branched alkanes, such as isotetradecane or isohexadecane. Choosing a high-flash-point isoparaffin solvent aims to significantly improve the safety of the composition, especially reducing the risk of combustion when used in high-temperature environments. For example, the isoparaffin solvent in the fragrance composition can be 55%, 60%, 62%, 65%, or 70%.

[0027] Specifically, a volatility regulator is a substance used to control the release rate of active ingredients (such as fragrances and deodorants) in a fragrance composition. For example, an organic solvent with a boiling point higher than that of isoalkane solvents can be used as a volatility regulator. By adjusting the type and amount of the volatility regulator, a stable and long-lasting release of fragrance and deodorizing effects can be achieved, avoiding the phenomenon of initial excessive concentration followed by rapid attenuation of the effect. For example, the volatility regulator in a fragrance composition can be 10%, 12%, 15%, 20%, or 25%.

[0028] Specifically, a fragrance refers to one or more compounds or mixtures with a specific odor that can provide aroma to a fragrance composition. In practice, it can be selected according to the desired odor characteristics, such as citral-type synthetic fragrances, floral fragrances, fruity fragrances, woody fragrances, or fresh fragrances. For example, the fragrance in a fragrance composition can be 5%, 8%, 15%, 15%, or 20%.

[0029] Specifically, a deodorant is a substance that can neutralize, adsorb, or decompose odor molecules in the air, thereby enhancing the actual deodorizing effect of the fragrance composition. Examples include cyclodextrin derivatives or microbial enzyme preparations. For instance, the deodorant in the fragrance composition can be 2%, 3%, 4%, or 5%.

[0030] In one possible implementation, the isoalkane solvent is isododecane.

[0031] Specifically, isododecane has properties such as low viscosity, high spreadability, good solubility, moderate volatility and high flash point. Isododecane can effectively dissolve active components such as fragrances and deodorants, ensuring the homogeneity and stability of the composition.

[0032] In one possible implementation, the volatility modifier is dipropylene glycol methyl ether.

[0033] Specifically, dipropylene glycol methyl ether can effectively regulate the evaporation rate of fragrances, ensuring that the fragrance composition maintains a stable fragrance release over a longer period of time. It also has good safety, with low toxicity and is unlikely to cause allergic reactions, thereby improving the user experience of the fragrance composition.

[0034] In one possible implementation, the flash point of the fragrance composition is greater than 65°C. Adjusting the flash point of the fragrance composition to be greater than 65°C can ensure that the fragrance has good safety, stability and deodorizing effect during use. For example, the flash point can be 65°C, 66°C, 67°C, 68°C, 70°C, etc.

[0035] In one possible implementation, the deodorant is a liquid deodorant comprising a complex active ingredient; wherein the complex active ingredient comprises at least one or more of forsythia fruit extract, fig extract, ginkgo nut extract, osmanthus flower extract, and red pine bark extract, and the complex active ingredient is capable of reacting with one or more of ammonia, hydrogen sulfide, nicotine, and formaldehyde.

[0036] Specifically, the liquid deodorant mixes well with other liquid components of the fragrance composition and is easy to disperse, thus ensuring that the deodorizing ingredients are evenly distributed throughout the composition. Forsythia fruit extract, fig extract, ginkgo nut extract, osmanthus flower extract, and red pine bark extract are all natural plant-derived extracts that can interact with odor molecules. For example, fig extract may contain enzymes or organic acids that help decompose odors; ginkgo nut extract and red pine bark extract are rich in tannins and polyphenols, which can adsorb or neutralize odor molecules. The compound active ingredients can convert odor molecules into odorless substances through chemical reactions. Each plant extract in the compound active ingredients has specific active functional groups that can specifically react with the target odor molecules. For example, forsythosides and forsythosides contained in forsythia fruit extract can undergo nucleophilic addition reactions with the carbonyl group of formaldehyde; proteases and organic acids in fig extract can catalyze the decomposition of ammonia and hydrogen sulfide; flavonoids in osmanthus flower extract can adsorb nicotine molecules through hydrogen bonds; and proanthocyanidins and tannins abundant in ginkgo nut extract and red pine bark extract can neutralize acidic or alkaline odor gases through redox and complexation reactions. These multiple active ingredients, in a nonpolar to weakly polar system composed of isoparaffin solvents and volatile regulators, can form a synergistic deodorizing network. The combined removal rate of ammonia, hydrogen sulfide, and nicotine is significantly higher than the sum of the removal rates of individual extracts, thus achieving a highly efficient and long-lasting deodorizing effect. For example, the deodorant can be deodorant A-100R, which can be obtained directly from the market. Deodorant A-100R may include ingredients such as forsythia fruit extract, fig extract, ginkgo nut extract, osmanthus flower extract, and red pine bark extract.

[0037] In one possible implementation, the isoparaffin solvent: volatility regulator: fragrance: deodorant ratio, by weight percentage, is 60%:22%:15%:3%. Repeated verification has shown that when this specific ratio is used, the isoparaffin solvent, as the main solvent, can fully dissolve and disperse the fragrance and deodorant. The volatility regulator's control over the evaporation rate is optimally matched with the release kinetics of the fragrance and deodorant, resulting in a composition that, while possessing high flash point safety, remains clear and transparent without stratification or precipitation during a wide temperature range cycling test from -18°C to 50°C, and exhibits excellent fragrance burst performance after 24 hours. As can be seen in the following experiments, compared to the stability degradation caused by excessive fragrance in Comparative Example 4, the weak fragrance caused by excessive solvent in Comparative Example 5, and the system imbalance caused by excessive regulator in Comparative Example 6, this ratio achieves an unexpected synergistic balance between safety, stability, and long-lasting deodorization.

[0038] In one possible implementation, the fragrance composition, under normal temperature and atmospheric pressure conditions, achieves a removal rate of more than 90% for at least one gaseous substance among ammonia, hydrogen sulfide, and nicotine within 24 hours.

[0039] Specifically, the deodorizing performance of the fragrance composition obtained in Example 1 below can be tested. The test was conducted in a 1 cubic meter sealed experimental chamber. 10 ml of the fragrance composition was placed in an open container and placed inside the chamber. Ammonia, hydrogen sulfide, and nicotine were injected until the initial concentration of each was 10 ppm. After standing for 24 hours at 25°C and normal pressure, the concentration of each gas in the chamber was determined by gas chromatography. The test results showed that the ammonia concentration dropped to below 0.5 ppm, the hydrogen sulfide concentration dropped to below 0.3 ppm, and the nicotine concentration dropped to below 0.8 ppm. The removal rate of the three gaseous substances was calculated to be greater than 90%. The results indicate that in a stable liquid system composed of isoparaffin solvent and volatility regulator, the composite deodorizing component can be continuously and uniformly released from the system and come into full contact with odor molecules, thereby achieving a long-lasting and efficient deodorizing effect. However, the deodorizing performance tests conducted on Comparative Examples 1-6 showed that the concentrations of ammonia, hydrogen sulfide, and nicotine were all between 2 ppm and 3 ppm, and the removal rates of the three gaseous substances were all less than 80%, failing to achieve the deodorizing effect of the fragrance composition of this embodiment.

[0040] This application discloses a fragrance composition comprising, by weight percentage: 55%-70% isoparaffin solvent, 10%-25% volatility modifier, 5%-20% fragrance, and 2%-5% deodorizer; wherein the isoparaffin solvent has a flash point greater than 80°C. By using a high-flash-point isoparaffin solvent as the main component, combined with a specific proportion of volatility modifier, fragrance, and deodorizer, the flammability risk is effectively avoided, while ensuring the stability and long-lasting deodorizing effect of the fragrance composition, resulting in excellent safety, stability, and deodorizing effect during use.

[0041] Corresponding to the foregoing embodiments, this application also provides a method for preparing a fragrance composition, comprising the following steps: S1: The isoparaffin solvent and the volatility regulator are stirred at a first preset temperature until they are mixed evenly to obtain the first solvent; S2: Add the fragrance to the first solvent and stir at the second preset temperature until the mixture is homogeneous to obtain the second solvent; S3: Add the deodorant to the second solvent and stir at a third preset temperature until the mixture is homogeneous to obtain the fragrance composition.

[0042] Specifically, the first, second, and third preset temperatures can be preset, for example, the first preset temperature is 25℃-45℃, the second preset temperature is 25℃-50℃, and the third preset temperature is 25℃-30℃. Understandably, an isomeric alkane solvent (e.g., isododecane) and a volatility modifier (e.g., dipropylene glycol methyl ether) can be added to a reactor equipped with a stirrer. The mixture is stirred at 200 rpm for approximately 30 minutes at 25℃ until a clear, transparent first solvent is formed. Then, the fragrance is slowly added to the first solvent, and the mixture is stirred at 150 rpm for approximately 45 minutes at 30℃ to ensure complete dissolution and uniform dispersion, yielding the second solvent. Finally, a liquid deodorant is added to the second solvent, and the mixture is stirred at 100 rpm for approximately 60 minutes at 25℃ until all components are thoroughly mixed to obtain the fragrance composition.

[0043] In one possible implementation, after step S3, the method further includes: aging the fragrance composition at a fourth preset temperature; wherein the aging process lasts for 12-48 hours.

[0044] Specifically, the aging process involves allowing the fragrance composition to stand under specific conditions for a period of time to promote the full integration and interaction between the components, forming a homogeneous and stable solution. This results in a more stable fragrance composition, helps eliminate any off-odors or disharmony that may occur during the mixing process, and makes the overall fragrance richer and longer-lasting. The fourth preset temperature can be room temperature. After aging, the aged fragrance composition can be bottled.

[0045] This application also provides a car fragrance, including the fragrance composition described above.

[0046] Specifically, fragrance compositions can be considered as one of the raw materials for making car air fresheners, and can also be used to make perfumes and added to daily necessities. Car air fresheners can be obtained by diluting fragrance compositions in specific proportions (such as 10%, 50%, or 100%), or by mixing fragrance compositions with other substances to make the fragrance of car air fresheners lighter.

[0047] The following is a description using specific examples: Example 1 S1: In a 500L clean reactor equipped with a jacketed heater, anchor stirrer, and thermometer, add 60.0 kg of isomeric dodecane and start stirring at 150 rpm. Slowly heat the material to 40°C by circulating warm water through the jacket. Then, slowly add 22.0 kg of dipropylene glycol methyl ether dropwise using a metering pump, controlling the dropwise addition time to approximately 30 minutes. After the dropwise addition is complete, continue stirring at 40°C for 20 minutes to obtain the first solvent.

[0048] S2: Maintain the system temperature at 40°C and the stirring speed at 150 rpm. Add 15 kg of citral flavoring in three batches (5 kg, 5 kg, 5 kg), with an interval of 5 minutes between each batch. After the flavoring is added, continue stirring at 40°C for 30 minutes to obtain the second solvent.

[0049] S3: Slowly cool the second solvent to below 25°C while stirring, and slowly add 3.0 kg of deodorant while stirring at low speed (100 rpm). Control the addition time to about 5-7 minutes. After the deodorant is added, adjust the stirring speed to 80 rpm and continue stirring for 40 minutes to obtain the fragrance composition.

[0050] S4: Transfer the fragrance composition through a pipe to a stainless steel curing tank and allow it to cure for 48 hours at room temperature (25°C) in the dark. After curing, filter the mixture using a precision bag filter made of 1-micron polypropylene material to obtain a qualified fragrance composition.

[0051] Example 2: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 55 kg of isoparaffin solvent, 25 kg of volatility regulator, 17 kg of fragrance, and 3 kg of deodorant.

[0052] Example 3: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 60 kg of isoparaffin solvent, 22 kg of volatility regulator, 15 kg of fragrance, and 3 kg of deodorant.

[0053] Example 4: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 70 kg of isoparaffin solvent, 15 kg of volatility regulator, 10 kg of fragrance, and 5 kg of deodorant.

[0054] Example 5: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 68 kg of isoparaffin solvent, 10 kg of volatility regulator, 19 kg of fragrance, and 3 kg of deodorant.

[0055] Example 6: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 55 kg of isoparaffin solvent, 25 kg of volatility regulator, 17 kg of fragrance, and 3 kg of deodorant.

[0056] Comparative Example 1: The preparation steps of this embodiment are the same as those of Example 1, except that the isoalkane added in S1 is an isodecane.

[0057] Comparative Example 2: This embodiment has the same preparation steps as Example 1, except that the volatility modifier added in S1 is dipropylene glycol monobutyl ether.

[0058] Comparative Example 3: The preparation steps of this embodiment are the same as those of Example 1, except that the volatility regulator added in S1 is isooctanol (2-ethylhexanol).

[0059] Comparative Example 4: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 40 kg of isoparaffin solvent, 25 kg of volatility regulator, 30 kg of fragrance, and 5 kg of deodorant.

[0060] Comparative Example 5: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 80 kg of isoparaffin solvent, 10 kg of volatility regulator, 7 kg of fragrance, and 3 kg of deodorant.

[0061] Comparative Example 6: The preparation steps of this embodiment are the same as those of Example 1, except that the added components are: 52 kg of isoparaffin solvent, 30 kg of volatility regulator, 15 kg of fragrance, and 3 kg of deodorant.

[0062] Product testing was conducted on the fragrance compositions in the examples and comparative examples. The testing methods included: 1. Visual observation; 2. Standing in a constant temperature drying oven at (50±2)°C for 30 days; 3. Freezing at -18°C for 24 hours, and then thawing at 25°C for 24 hours, which was one cycle; and three consecutive cycles were performed; 4. Artificial evaluation method to evaluate the fragrance bursting effect after 24 hours.

[0063] The test results are shown in Table 1 below: Table 1

[0064] The conclusions are as follows: As shown in Examples 1-6, when the composition of the fragrance composition is 55%-70% isoparaffin solvent, 10%-25% volatility regulator, 5%-20% fragrance, and 2%-5% deodorant, the fragrance composition is a colorless and transparent liquid without layering or precipitation. After 30 days, there is no turbidity or layering, and after 3 cycles, there is no layering or crystallization. The fragrance burst test for 24 hours is excellent. This indicates that the fragrance composition formed by this formula has good stability and long-lasting deodorizing effect. The fragrance has good safety, stability, and deodorizing effect during use.

[0065] A comparison of Examples 1-6 and Comparative Example 1 shows that Examples 1-6 all used isododecane, while Comparative Example 1 used isodecane. Isodecane is a low flash point alkane (flash point 46–55°C), which is highly volatile but flammable and has poor stability. Although the fragrance composition in Comparative Example 1 appeared to be a colorless and transparent liquid without layering or precipitation, slight layering occurred after three high and low temperature cycling stability tests. This indicates that the fragrance composition using low flash point alkane as a solvent has poor stability and performs poorly in high and low temperature cycling environments, resulting in poor safety and stability during use, and further reducing the lifespan of the fragrance.

[0066] A comparison of Examples 1-6 with Comparative Examples 2 and 3 reveals that Examples 1-6 all used dipropylene glycol methyl ether, while Comparative Example 2 used dipropylene glycol monobutyl ether. Dipropylene glycol monobutyl ether evaporates more slowly and has a stronger odor, which affects the overall fragrance of the composition. The conclusion is that the fragrance prepared in Comparative Example 2 has a generally poor 24-hour fragrance burst rating and exhibits an off-odor. This indicates that adding dipropylene glycol monobutyl ether to the fragrance affects its release and easily leads to off-odors, making it unsuitable for daily use. Comparative Example 3, using isooctanol (2-ethylhexanol), caused the fragrance to become cloudy after 30 days, and significant turbidity was observed after three high- and low-temperature cycling tests, indicating poor stability. This means that adding isooctanol (2-ethylhexanol) to the fragrance causes it to become cloudy at low temperatures and its odor changes at high temperatures.

[0067] As can be seen from Examples 1-6 and Comparative Examples 4-6, when the composition of the fragrance composition is not 55%-70% isoparaffin solvent, 10%-25% volatile modifier, 5%-20% fragrance, and 2%-5% deodorant, the resulting fragrances all exhibit abnormal colors, layering, and off-odors. In particular, turbidity appears after 30 days, and layering and crystallization occur under both high-temperature and low-temperature environments. That is, the fragrances prepared according to the component ratios of Comparative Examples 4-6 have poor stability, off-odors, and short service life.

[0068] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0069] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A fragrance composition, characterized in that, By weight percentage, it consists of the following components: 55%-70% isoparaffin solvent, 10%-25% volatility modifier, 5%-20% fragrance, and 2%-5% deodorant. The flash point of the isoparaffin solvent is greater than 80°C.

2. The fragrance composition according to claim 1, characterized in that, The isoalkyl solvent is isododecane.

3. The fragrance composition according to claim 1, characterized in that, The volatility regulator is dipropylene glycol methyl ether.

4. The fragrance composition according to claim 1, characterized in that, The fragrance composition has a flash point greater than 65°C.

5. The fragrance composition according to claim 1, characterized in that, The deodorant is a liquid deodorant comprising compound active ingredients; The compound active ingredients include at least one or more of the following: forsythia fruit extract, fig extract, ginkgo nut extract, osmanthus flower extract, and red pine bark extract. The compound active ingredients can react with one or more of the following: ammonia, hydrogen sulfide, nicotine, and formaldehyde.

6. The fragrance composition according to claim 1, characterized in that, By weight percentage, the isoparaffin solvent: volatility regulator: fragrance: deodorant = 60%: 22%: 15%: 3%.

7. The fragrance composition according to claim 1, characterized in that, The fragrance composition, under normal temperature and pressure conditions at 25°C, achieves a removal rate of more than 90% for at least one gaseous substance among ammonia, hydrogen sulfide, and nicotine within 24 hours.

8. A method for preparing a fragrance composition according to any one of claims 1-7, characterized in that, The preparation method includes the following steps: S1: The isoparaffin solvent and the volatility regulator are stirred at a first preset temperature until they are mixed evenly to obtain a first solvent; S2: Add the fragrance to the first solvent and stir at a second preset temperature until the mixture is homogeneous to obtain the second solvent; S3: Add the deodorant to the second solvent and stir at a third preset temperature until the mixture is homogeneous to obtain the fragrance composition.

9. The preparation method according to claim 8, characterized in that, After step S3, the method further includes: aging the fragrance composition at a fourth preset temperature; wherein the aging process lasts for 12-48 hours.

10. A car fragrance, characterized in that, The fragrance composition includes any one of claims 1-7.

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