A cooling agent composition and its use in nicotine e-cigarettes

Abstract

The present application relates to the technical field of electronic cigarette flavor additives, and particularly relates to a cooling agent composition and application thereof in nicotine electronic cigarettes, which comprises the following components in parts by weight: 30-75 parts of a cosolvent aid and 5-50 parts of at least one WS series cooling agent. The WS series cooling agent comprises a combination of one or more of WS-2, WS-14 and WS-27. The composition of the present application uses natural mint derivatives, synthetic long-acting cooling agents and soothing flavor aids as core compounded components, and realizes gradient cooling output through precise proportioning. The composition can effectively neutralize the pungent, irritating and throat-stinging sensation caused by nicotine, improve the smoothness of smoke, solve the problems of traditional cooling agents such as strong and irritating menthol, ws-23 and ws-3 mint cooling, and lack of follow-up strength, and simultaneously has the advantages of high-temperature atomization resistance, uniform and long-lasting cooling, and adaptation to different nicotine concentration of tobacco oil.

Description

Technical Field

[0001] This invention relates to the field of flavor additives for electronic cigarettes, and more particularly to a cooling agent composition and its application in nicotine-based electronic cigarettes. Background Technology

[0002] Nicotine-based e-cigarettes have become a mainstream consumer vaping product due to their advantages of similar taste to traditional cigarettes, convenient vaping, and wide variety. However, most nicotine-based e-cigarettes on the market currently suffer from taste defects, with the core issue being poor compatibility between the cooling system and nicotine. Existing e-cigarette cooling systems often use only L-menthol or WS-23 as cooling ingredients, resulting in a simple composition and significant functional limitations.

[0003] High concentrations of nicotine have a strong pungent and irritating effect, easily causing discomfort such as choking, tongue numbness, and dry throat when inhaled. Menthol alone only provides a superficial, instantaneous cooling sensation, failing to neutralize the deeper irritation of nicotine. Furthermore, the cooling effect is short-lived, rapidly diminishing in the latter half of the inhalation, revealing the full spiciness of nicotine and resulting in a significant drop in taste. Simultaneously, pure menthol has a strong, pungent cooling sensation and is prone to crystallization at low temperatures, causing e-liquid stratification and uneven atomization. It also evaporates rapidly during high-temperature atomization, leading to inconsistent taste from beginning to end. In addition, long-term use of e-cigarettes with only a single menthol flavor can easily cause taste fatigue and lead to problems such as dry mouth, astringency, and lingering odors, severely impacting the product's vaping quality and user experience.

[0004] Existing technologies often use WS-23 as the primary ingredient in blended menthol cooling agents, without optimizing the formulation to address the irritant properties of nicotine. This results in poor component compatibility, inconsistent cooling sensations, conflicts with tobacco flavor, and insufficient atomization stability. Consequently, these agents are unsuitable for e-cigarette products with varying nicotine concentrations, leading to poor industrial applicability. Therefore, developing a dedicated cooling agent composition suitable for nicotine-based e-cigarettes, offering a rich and varied cooling sensation, long-lasting stability, and the ability to neutralize nicotine irritation is a pressing technical challenge in this field. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a cooling agent composition and its application in nicotine-based e-cigarettes, so as to solve the problems of existing cooling systems such as single cooling sensation, poor duration, inability to neutralize nicotine stimulation, insufficient atomization stability, and easy taste fatigue, and improve the smoothness of taste, flavor layering and product stability of nicotine-based e-cigarettes.

[0006] To achieve the above objectives, the present invention provides a cooling agent composition comprising the following components in parts by weight: 2-5 parts of a solubilizing agent and 0.1-25 parts of at least one WS series cooling agent.

[0007] The WS series cooling agents include one or more combinations of WS-2 (N-ethyl-2,3-dimethyl-2-isopropylbutyramide), WS-14 (N-tert-butyl-2-isopropyl-5-methyl-cyclohexaneformamide) and WS-27 (N-ethyl-2,2-diisopropylbutyramide).

[0008] The weight parts of WS-2 are 0-50 parts, the weight parts of WS-14 are 0-8 parts, and the weight parts of WS-27 are 0-50 parts. Preferably, the weight parts ratio of the cooling agent composition is: 2 parts of WS-2, 0.5 parts of WS-14, 3.5 parts of WS-27, 3 parts of watermelon flavoring, and 3.5 parts of solubilizer.

[0009] The cooling agent composition further includes 2-5 parts of flavoring. The flavoring includes fruit-flavored flavorings. Optionally, the flavoring may be watermelon flavoring, cantaloupe flavoring, lemon flavoring, etc.

[0010] The solubilizing agent is propylene glycol or a compound solvent of propylene glycol and vegetable glycerin; the mass ratio of propylene glycol to vegetable glycerin is 5-10:1. It has the functions of solubilizing, stabilizing fragrance, and moisturizing, effectively improving the compatibility of various organic components, preventing low-temperature crystallization and high-temperature volatilization failure, and alleviating the problem of dryness at the suction mouth.

[0011] The preparation method involves first mixing the WS series cooling agents and solubilizers evenly, then adding the flavoring and mixing evenly. After standing and filtering to remove impurities, the cooling agent composition is obtained. Preferably, under normal temperature and light-protected conditions, the stabilizing and solubilizing agents are first added to a stirred tank, followed by the sequential addition of WS-2, WS-14, and WS-27 long-lasting cooling agents, and stirred at a uniform speed for 10–15 minutes until completely dissolved. Then, the flavoring is added sequentially, and stirring is continued for 20–25 minutes at a stirring speed controlled at 300–500 r / min. After stirring, the mixture is allowed to stand for 30 minutes, and then filtered to remove trace amounts of insoluble impurities, resulting in a uniform, transparent, and highly stable cooling agent composition.

[0012] The present invention also provides the use of the cooling agent composition in electronic cigarettes.

[0013] The electronic cigarette is a nicotine-based electronic cigarette. The cooling agent composition is added to the atomizing liquid of the nicotine-based electronic cigarette, and the amount of the cooling agent composition added is 1-20% of the total mass of the atomizing liquid. Adding the cooling agent composition to the nicotine-based electronic cigarette atomizing liquid at 1-20% of the total mass of the atomizing liquid is suitable for various nicotine raw materials such as free nicotine and nicotine salts, and is suitable for electronic cigarette products with different nicotine concentrations of 1-5%.

[0014] The nicotine-based e-cigarette vaporizing liquid comprises the following components by weight percentage: 1-5% nicotine salt or nicotine, 20-45% propylene glycol, 25-50% vegetable glycerin, 0.1-15% flavoring, 0-4% sweetener, 0-5% organic acid, and 1-20% cooling agent composition.

[0015] The preparation process of the atomizing liquid is as follows: at room temperature and pressure, propylene glycol and vegetable glycerin are mixed evenly, nicotine raw materials are added and stirred to dissolve, and then flavoring, sweetener, organic acid and cooling agent combination is added. The mixture is stirred in a sealed container for 30-40 minutes at a speed of 300-500 r / min. After stirring, the mixture is allowed to stand at room temperature for 12-24 hours to obtain the finished nicotine electronic cigarette atomizing liquid.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention uses a compound system of new menthol derivative components and synthetic long-lasting cooling agents. WS-2 provides an instant refreshing coolness upon inhalation, quickly suppressing the initial spiciness of nicotine; WS-27 provides a long-lasting and gentle deep coolness, covering the entire inhalation process; WS-14 solves the problem of emptiness in the back of the mouth in the latter half; flavor enhances the flavor profile, and when compounded with the cooling agent system, it achieves a gradient taste with a refreshing initial taste, a gentle middle taste, and a sweet aftertaste, avoiding or alleviating the problems of high nicotine throat irritation and numbness.

[0018] 2. This invention utilizes a specialized compound stabilizing and solubilizing agent to effectively improve the compatibility of each component, preventing low-temperature crystallization and e-liquid stratification. Simultaneously, it enhances the high-temperature resistance of the cooling component, preventing rapid evaporation of the cooling sensation during high-temperature atomization. Furthermore, the cooling sensation in the atomized vapor is generally uniform and consistent, making it compatible with various electronic cigarette atomization devices. The vegetable glycerin also has moisturizing properties, effectively alleviating dry mouth and astringent sensations caused by prolonged smoking. It leaves no lingering minty odor, does not mask the natural aroma of tobacco, and offers a harmonious and natural flavor, reducing taste fatigue and enhancing the user's long-term smoking experience.

[0019] 3. This invention is compatible with nicotine e-cigarette products with concentrations of 1-5%, and is compatible with mainstream raw materials such as free nicotine and nicotine salts. It has wide applicability, high industrialization value, meets the food safety standards for e-cigarettes, and can be mass-produced industrially. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0022] Example 1

[0023] Preparation of Cooling Agent Composition

[0024] Prepare the following ingredients by weight: WS-2 2 parts, WS-14 0.5 parts, WS-27 3.5 parts, watermelon flavoring 3 parts, and solubilizer 60 parts (propylene glycol: vegetable glycerin = 6:1).

[0025] Preparation steps: Under normal temperature and light-protected conditions, add the stabilizing and solubilizing agents to the stirred tank, add WS-2, WS-14, and WS-27, and stir at 400 r / min for 12 min until completely dissolved; then add watermelon flavoring and continue stirring for 22 min; after standing for 30 min, filter through a 200 mesh filter to obtain a clear and transparent cooling agent composition S1.

[0026] Example 2

[0027] Preparation of Cooling Agent Composition

[0028] Prepare the ingredients according to the following weight ratio: 0.6 parts of WS-14, 5 parts of WS-27, 3 parts of watermelon flavoring, and 40 parts of solubilizer (propylene glycol: vegetable glycerin = 6:1).

[0029] Preparation steps: Under normal temperature and light-protected conditions, add the stabilizing and solubilizing agent to the stirred tank, add WS-14 and WS-27, and stir at 400 r / min for 10 min until completely dissolved; then add watermelon flavoring and continue stirring for 20 min; after standing for 30 min, filter through a 200 mesh filter to obtain a clear and transparent cooling agent composition S2.

[0030] Example 3

[0031] Preparation of Cooling Agent Composition

[0032] Prepare the ingredients according to the following weight ratio: 10 parts WS-2, 3 parts WS-27, 3 parts watermelon flavoring, and 60 parts solubilizer (propylene glycol: vegetable glycerin = 5:1).

[0033] Preparation steps: Under normal temperature and light-protected conditions, add the stabilizing and solubilizing agent to the stirred tank, add WS-2 and WS-27, and stir at 400 r / min for 15 min until completely dissolved; then add watermelon flavoring and continue stirring for 25 min; after standing for 30 min, filter with a 200 mesh filter to obtain a clear and transparent cooling agent composition S3.

[0034] Example 4

[0035] Preparation of Cooling Agent Composition

[0036] Prepare the following ingredients by optimal weight ratio: 15 parts WS-2, 0.3 parts WS-14, 1 part WS-27, 4 parts watermelon flavoring, and 70 parts solubilizer (propylene glycol: vegetable glycerin = 10:1).

[0037] Preparation steps: Under normal temperature and light-protected conditions, add the stabilizing and solubilizing agents to the stirred tank, add WS-2, WS-14, and WS-27, and stir at 400 r / min for 15 min until completely dissolved; then add watermelon flavoring and continue stirring for 23 min; after standing for 30 min, filter through a 200 mesh filter to obtain a clear and transparent cooling agent composition S4.

[0038] Example 5

[0039] Preparation of Nicotine-based Electronic Cigarette Fluid

[0040] The atomizing liquid is prepared by weight percentage as follows: nicotine salt 3%, propylene glycol 38%, vegetable glycerin 55%, tobacco flavoring 2%, sweetener 1%, citric acid 0.5%, and the cooling agent composition S1 prepared in Example 1 2%.

[0041] Preparation process: At room temperature and pressure, propylene glycol and vegetable glycerin are mixed and stirred evenly. Nicotine salt is then added and stirred until completely dissolved. Tobacco flavoring and cooling agent composition S1 is added and stirred in a sealed container at 400 r / min for 35 min. The mixture is then allowed to stand at room temperature for 18 h to obtain the finished electronic cigarette vaporizing liquid.

[0042] Example 6

[0043] The difference between this embodiment and embodiment 5 is that the cooling agent composition S1 is replaced with S2, and the atomizing liquid does not contain citric acid.

[0044] Example 7

[0045] The difference between this embodiment and Embodiment 5 is that the cooling agent composition S1 is replaced with S3.

[0046] Example 8

[0047] The difference between this embodiment and Embodiment 5 is that the cooling agent composition S1 is replaced with S4.

[0048] Comparative Example 1

[0049] The difference between this comparative example and Example 5 is that, in the same basic formulation of the atomizing liquid as in Example 5, an equal mass fraction of pure menthol is added as a cooling agent to replace S1, while the other components and processes are completely identical, and a comparative atomizing liquid is prepared.

[0050] Comparative Example 2

[0051] This comparative example uses a simple compound formulation of conventional menthol, WS-23, and WS-3. The same fragrance and components are added in the same amount to prepare the comparative atomized liquid. The other formulations and processes are the same as in Example 5.

[0052] Effect test experiment

[0053] Twenty professional tasters were selected to conduct blind tests and score the atomized liquids obtained in Examples 5-8 and Comparative Examples 1-2. The scoring dimensions included uniformity of cooling sensation, nicotine irritation, flavor complexity, dryness of mouth, and mouthfeel persistence. The maximum score was 10 points, and the average score was taken. The test results are as follows:

[0054]

[0055] Test results show that the atomizing liquid prepared by this invention has significantly better taste indicators than the comparative example. It can significantly reduce the irritation of nicotine, provide a uniform and lasting cooling sensation with rich layers, and eliminate problems such as dry mouth and off-flavor, thus greatly improving the taste quality. Furthermore, high and low temperature stability tests show no crystallization or stratification after 72 hours at -10℃ and no flavor degradation after 48 hours at 60℃, demonstrating excellent atomization stability.

[0056] In summary, the electronic cigarette product prepared by this invention has a mellow taste, a rich and layered cooling sensation, a harmonious and natural flavor, and is less likely to cause taste fatigue. It greatly improves the smoking experience and product quality, and has extremely high industrialization and promotion value.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A cooling agent composition, characterized in that, It includes the following components by weight: 30-75 parts of solubilizing agent and 5-50 parts of at least one WS series cooling agent.

2. The cooling agent composition according to claim 1, characterized in that, The WS series cooling agents include one or more combinations of WS-2, WS-14 and WS-27.

3. The cooling agent composition according to claim 2, characterized in that, The weight parts of WS-2 are 0-50 parts, the weight parts of WS-14 are 0-8 parts, and the weight parts of WS-27 are 0-50 parts.

4. The cooling agent composition according to claim 1, characterized in that, The cooling agent composition also includes 2-5 parts of flavoring.

5. The cooling agent composition according to claim 4, characterized in that, The solubilizing agent is propylene glycol or a compound solvent of propylene glycol and vegetable glycerin; the mass ratio of propylene glycol to vegetable glycerin is 5-10:

1.

6. The method for preparing the cooling agent composition according to any one of claims 1-5, characterized in that, The preparation method is to first stir the WS series cooling agent and the solubilizer evenly, then add the flavoring and stir evenly, and then let it stand and filter to remove impurities to obtain the cooling agent composition.

7. The use of the cooling agent composition according to any one of claims 1-5 in electronic cigarettes.

8. The application according to claim 7, characterized in that, The electronic cigarette is a nicotine-based electronic cigarette, and the cooling agent composition is added to the atomizing liquid of the nicotine-based electronic cigarette. The amount of the cooling agent composition added is 1-20% of the total mass of the atomizing liquid.

9. The application according to claim 8, characterized in that, The nicotine-based e-cigarette vaporizing liquid comprises the following components by weight percentage: 1-5% nicotine salt or nicotine, 20-45% propylene glycol, 25-50% vegetable glycerin, 0.1-15% flavoring, 0-4% sweetener, 0-5% organic acid, and 1-20% cooling agent composition.

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