A kind of long-lasting fragrance essence for microcapsules and preparation method thereof

Abstract

The present application relates to the field of flavors and fragrances, and specifically discloses a long-lasting fragrance for microcapsules and a preparation method thereof. A long-lasting fragrance for microcapsules, comprising the following components in parts by weight: 0.1-1 parts of ethyl 2-methylbutyrate; 1-5 parts of geraniol; 1-5 parts of nerol; 1-5 parts of fresh alcohol; 1-5 parts of diphenyl ether; 1-5 parts of privet aldehyde; 1-5 parts of hexyl salicylate; 1-5 parts of methyl nonane acetaldehyde; 5-10 parts of dihydromyrcenol; 5-10 parts of hexyl acetate; 5-10 parts of phenylethyl acetate; 25-30 parts of tricyclodecenyl acetate; 25-30 parts of solvent; 2-6 parts of a stabilizing mixing aid; the stabilizing mixing aid comprises the following components in parts by weight: carboxymethyl cellulose, xanthan gum and modified starch, and the mass ratio of carboxymethyl cellulose, xanthan gum and modified starch is (1.7-2.3):1:(14-19). The microcapsule-based long-lasting fragrance essence of the present application will not release fragrance so violently in the early stage when it is affected by friction heat in later applications, and will show an excellent long-lasting fragrance effect as a whole.

Description

Technical Field

[0001] The present application relates to the field of flavors and fragrances, and more specifically, to a long-lasting fragrance for microcapsules and a preparation method thereof. Background Art

[0002] Fragrance microcapsules are to encapsulate fragrances and flavors in microcapsules, so that the fragrances and flavors are isolated from the outside world, thereby protecting the fragrances and flavors from the external environment and reducing the escape of fragrance. When used, the fragrance microcapsules in the carrier (toothpaste, laundry detergent, shower gel, shampoo, etc.) are deposited on fabrics, skin or hair. After drying, the fragrance microcapsules are broken by slight friction, and the fragrance inside slowly releases the fragrance, thus achieving the effect of long-lasting fragrance.

[0003] A Chinese invention patent application document with publication number CN112745993A discloses a microcapsule flavor and its preparation method and application. The microcapsule flavor is composed of a wall material and a core material. The wall material is a polyurea resin, and based on the total weight of the microcapsule flavor, the core material is made of the following raw materials in weight percentage: 1-5% lavender oil, 3-6% eucalyptus oil, 0.5-1% patchouli oil, 30-40% p-tert-butyl cyclohexyl acetate, 2-6% ethyl naphthalene ether, 5-10% tricyclodecenyl acetate, 8-12% isopropyl myristate, 1-5% dodecanitrile and 1-5% dodecanal. The microcapsule flavor provided by the present invention has a high embedding rate, is not easy to adhere, and has very good storage stability. The microcapsule flavor can break the wall under the action of friction or a small external force to release a unique floral fragrance, and the product is green and pollution-free.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the fragrance-releasing components in the core material are more sensitive to temperature as a whole. In particular, when microcapsule fragrances are used, they often need to be rubbed to damage the wall material. The heat generated by friction will cause the fragrance-releasing components to have a rapid and intense fragrance-releasing effect in the early stage, resulting in a loss of its overall long-lasting fragrance-releasing effect. Therefore, it is necessary to propose a new solution to solve the above-mentioned problem. Summary of the invention

[0005] In order to make the fragrance-releasing components of the essence maintain a stable and lasting fragrance-releasing effect after being affected by friction heat, the present application provides a long-lasting fragrance essence for microcapsules and a preparation method thereof.

[0006] In the first aspect, the present application provides a microcapsule-based long-lasting fragrance essence, which adopts the following technical solution:

[0007] A long-lasting fragrance essence for microcapsules, comprising the following components in parts by weight: 0.1-1 part of ethyl 2-methylbutyrate;

[0008] 1-5 parts of geraniol;

[0009] 1-5 parts of nerol;

[0010] 1-5 parts of fresh alcohol;

[0011] 1-5 parts of diphenyl ether;

[0012] Ligustrum lucidum 1-5 parts;

[0013] 1-5 parts of hexyl salicylate;

[0014] 1-5 parts of methylnonane acetaldehyde;

[0015] 5-10 parts of dihydromyrcenol;

[0016] 5-10 parts of hexyl acetate;

[0017] 5-10 parts of phenylethyl acetate;

[0018] 25-30 parts of tricyclodecenyl acetate;

[0019] 25-30 parts of solvent;

[0020] 2-6 parts of stabilizing mixing aid;

[0021] The stabilizing mixing aid comprises the following components in parts by weight: carboxymethyl cellulose, xanthan gum and modified starch, and the mass ratio of the carboxymethyl cellulose, xanthan gum and modified starch is (1.7-2.3):1:(14-19).

[0022] By adopting the above technical scheme, other raw materials except solvents and stable mixing aids can be mixed to form a uniform and stable fragrance-releasing matrix, and the released fragrance is rich and pleasant, with high fragrance quality. Carboxymethyl cellulose has a thickening effect, and is conducive to the full mixing of other raw materials and forming a uniform mixed state; xanthan gum is conducive to maintaining good suspension of the fragrance-releasing component, not easy to settle and coagulate, and can stably release fragrance; modified starch is a starch-based polymer, which has a certain controlled release effect on the volatility of the fragrance-releasing component; at the same time, the applicant found that when carboxymethyl cellulose, xanthan gum and modified starch are used in a specific mass ratio to form a stable mixing aid, it can not only be combined with the fragrance-releasing matrix uniformly and stably, without affecting the production of the modulated fragrance, but also show excellent heat resistance stability, especially when the microcapsule is used as a core material for a long-lasting fragrance essence, when it is affected by friction heat in the later application, the initial fragrance release will not appear so fierce, and the overall excellent long-lasting fragrance effect is shown. Therefore, the microcapsule long-lasting fragrance essence obtained in this application can show excellent fragrance release quality during the application process, and has excellent and obvious application prospects.

[0023] Preferably, the mass ratio of the carboxymethyl cellulose, xanthan gum and modified starch is 2:1:16.

[0024] By adopting the above technical scheme, the mixed system formed by the carboxymethyl cellulose, xanthan gum and modified starch in the above proportions with the other component raw materials during the application process is more uniform and stable, and the coordination effect between them is the most excellent, which has excellent binding and protection effects on the molecules in the fragrance-releasing matrix, making the heat-resistant properties of the microcapsule-based long-lasting fragrance the most excellent, and thus the fragrance release is more lasting and stable.

[0025] Preferably, 1-3 parts by weight of a molecular enhancement aid is also added to the components of the long-lasting fragrance for microcapsules, and the molecular enhancement aid comprises the following components: glyceryl monostearate and sorbitan monostearate, and the mass ratio of glyceryl monostearate to sorbitan monostearate is (0.4-0.7):1.

[0026] By adopting the above technical scheme, glyceryl monostearate can improve the stability of the molecular structure of each substance in the long-lasting fragrance essence for microcapsules; sorbitan monostearate has lubricity, has a slow-release effect on flavors and fragrances, and has excellent temperature resistance; and when glyceryl monostearate and sorbitan monostearate are used in combination in a specific proportion, they have a role in enhancing the binding of the fragrance-releasing molecules in the long-lasting fragrance essence for microcapsules, and when affected by frictional heat, the arrangement structure between the fragrance-releasing molecules is not easy to change drastically, which can effectively suppress the fierceness of the early fragrance release and achieve an excellent long-lasting fragrance effect.

[0027] Preferably, the mass ratio of glyceryl monostearate to sorbitan monostearate is 0.6:1.

[0028] By adopting the above technical scheme, the above-mentioned proportion of glyceryl monostearate and sorbitan monostearate can exert the best coordination effect, and have the most obvious effect on the fragrance-releasing molecules in the microcapsule long-lasting fragrance essence, thereby maintaining the most excellent long-lasting fragrance effect.

[0029] Preferably, 0.5-1.2 parts by weight of glucomannan palmitate is also added to the components of the molecular strengthening auxiliary agent.

[0030] By adopting the above technical scheme, glucomannan palmitate has the function of maintaining the dispersibility of the mixed system. When a molecular reinforcing agent is added, it can play an excellent film adhesion role in combination with glyceryl monostearate and sorbitan monostearate, especially between the fragrance-releasing molecules, which can greatly improve the intermolecular binding, greatly reduce the influence of friction heat on the microcapsule long-lasting fragrance essence, and thus greatly improve the long-lasting fragrance effect of the microcapsule long-lasting fragrance essence.

[0031] Preferably, the mass ratio of glucomannan palmitate, glyceryl monostearate and sorbitan monostearate is 0.7:0.9:1.5.

[0032] By adopting the above technical scheme, the above-mentioned proportions of glucomannan palmitate, glyceryl monostearate and sorbitan monostearate have an excellent coordination effect with each other during the application process, so that the bonds between the fragrance-releasing molecules are not easily dispersed quickly when affected by frictional heat, and thus in the subsequent application process, a uniform, stable and long-lasting fragrance can be produced, so that the long-lasting fragrance essence used in the microcapsule has a relatively excellent quality.

[0033] Preferably, the solvent is any one of cyclohexyl salicylate, isopropyl myristate and dipropylene glycol.

[0034] By adopting the above technical scheme and the selection of the above solvents, the other raw materials can be fully mixed to form a uniform and stable mixing system, and the stabilizing mixing aid can be assisted to fully play its role, so that the microcapsule long-lasting fragrance essence not only has excellent fragrance quality, but also can retain fragrance for a longer time and stability, and the overall quality is excellent.

[0035] In a second aspect, the present application provides a method for preparing a long-lasting fragrance for microcapsules, using the following technical solution:

[0036] A method for preparing a microcapsule long-lasting fragrance essence comprises the following steps:

[0037] (1) preparing raw materials including ethyl 2-methylbutyrate, geraniol, nerol, citronellol, diphenyl ether, privet aldehyde, hexyl salicylate, methyl nonane acetaldehyde, dihydromyrcenol, hexyl acetate, phenylethyl acetate, tricyclodecenyl acetate, a solvent, and a stabilizing mixing aid according to a ratio;

[0038] (2) placing the raw materials in step (1) in a stirring container and stirring and mixing them, and after stirring and mixing them evenly, subjecting the obtained mixed liquid to high pressure homogenization to obtain a long-lasting fragrance essence for microcapsules.

[0039] By adopting the above technical solution, the preparation steps of the microcapsule long-lasting fragrance essence of the present application are few, the process is simple, and it is convenient for large-scale production. At the same time, after the raw materials are stirred and mixed evenly, high-pressure homogenization is carried out, which is conducive to fully mixing the raw materials of each component, thereby ensuring the overall quality of the microcapsule long-lasting fragrance essence.

[0040] In summary, this application has the following beneficial effects:

[0041] 1. When carboxymethyl cellulose, xanthan gum and modified starch are used as a stable mixed additive in a specific mass ratio, when the microcapsule uses a long-lasting fragrance essence as a core material and is affected by friction heat in the later application, the initial fragrance release will not appear so fierce, and the overall effect of long-lasting fragrance is excellent;

[0042] 2. Adding molecular reinforcing agents including glyceryl monostearate and sorbitol monostearate in a specific mass ratio can enhance the binding of the fragrance-releasing molecules in the microcapsule-based long-lasting fragrance essence. When affected by frictional heat, the arrangement structure between the fragrance-releasing molecules is not prone to drastic changes, which can effectively inhibit the fierceness of the early fragrance release and achieve an excellent long-lasting fragrance effect.

[0043] 3. Adding glucomannan palmitate to the components of the molecular enhancement additive, and in combination with glyceryl monostearate and sorbitan monostearate, can greatly improve the binding between the fragrance-releasing molecules, greatly reduce the influence of friction heat on the microcapsule long-lasting fragrance essence, and thus greatly improve the long-lasting fragrance effect of the microcapsule long-lasting fragrance essence. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with embodiments.

[0045] Example

[0046] Example 1

[0047] A long-lasting fragrance essence for microcapsules, the components and their corresponding weights are shown in Table 1, and is prepared by the following steps:

[0048] (1) preparing raw materials including ethyl 2-methylbutyrate, geraniol, nerol, citronellol, diphenyl ether, privet aldehyde, hexyl salicylate, methyl nonane acetaldehyde, dihydromyrcenol, hexyl acetate, phenylethyl acetate, tricyclodecenyl acetate, a solvent, and a stabilizing mixing aid according to a ratio;

[0049] (2) placing the raw materials in step (1) in a stirring container and stirring and mixing them; after the stirring and mixing are uniform, the stirring time is 20 min and the stirring speed is 50 rpm; and then the obtained mixed liquid is subjected to high-pressure homogenization, and the homogenization pressure is 30 MPa for the first level and 10 MPa for the second level, thereby obtaining a long-lasting fragrance essence for microcapsules.

[0050] Note: In the above steps, the stabilizing mixing aid is composed of carboxymethyl cellulose, xanthan gum and modified starch in a mass ratio of 2:1:16; the solvent is cyclohexyl salicylate.

[0051] Example 2-3

[0052] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the components and their corresponding weights are shown in Table 1.

[0053] Table 1 Components and their weights in Examples 1-3 (kg)

[0054] Components Example 1 Example 2 Example 3 Ethyl 2-methylbutyrate 0.55 0.1 1 Geraniol 3 1 5 Nerolidol 3 5 1 Fresh and mellow 3 1 5 Diphenyl ether 3 1 5 Ligustrum lucidum 3 5 1 Hexyl Salicylate 3 5 1 Methylnonane acetaldehyde 3 1 5 Dihydromyrcenol 7.5 5 10 Hexyl acetate 7.5 10 5 Phenethyl acetate 7.5 10 5 Tricyclodecenyl acetate 27.5 30 25 Solvents 27.5 25 30 Stabilizing mixing aids 4 2 6

[0055] Example 4

[0056] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of carboxymethyl cellulose, xanthan gum and modified starch in a mass ratio of 1.7:1:14.

[0057] Example 5

[0058] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of carboxymethyl cellulose, xanthan gum and modified starch in a mass ratio of 2.3:1:19.

[0059] Example 6

[0060] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of carboxymethyl cellulose, xanthan gum and modified starch in a mass ratio of 2:1:16.5.

[0061] Example 7

[0062] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that 2 parts by weight of a molecular enhancement aid is further added to the raw materials in step (1), and the molecular enhancement aid is composed of glyceryl monostearate and sorbitan monostearate in a mass ratio of 0.6:1.

[0063] Example 8

[0064] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that 1 part by weight of a molecular enhancement auxiliary agent is added to the raw materials in step (1).

[0065] Example 9

[0066] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that 3 parts by weight of a molecular enhancement auxiliary agent are added to the raw materials in step (1).

[0067] Example 10

[0068] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that the molecular reinforcing auxiliary agent is composed of glyceryl monostearate and sorbitan monostearate in a mass ratio of 0.4:1.

[0069] Embodiment 11

[0070] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that the molecular reinforcing auxiliary agent is composed of glyceryl monostearate and sorbitan monostearate in a mass ratio of 0.7:1.

[0071] Example 12

[0072] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that the molecular reinforcing auxiliary agent is composed of glyceryl monostearate and sorbitan monostearate in a mass ratio of 0.55:1.

[0073] Example 13

[0074] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that the molecular reinforcing auxiliary agent is glyceryl monostearate.

[0075] Embodiment 14

[0076] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that the molecular reinforcing auxiliary agent is sorbitan monostearate.

[0077] Embodiment 15

[0078] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that 0.85 parts by weight of glucomannan palmitate is also added to the components of the molecular enhancement auxiliary agent.

[0079] Example 16

[0080] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that 0.5 parts by weight of glucomannan palmitate is also added to the components of the molecular enhancement auxiliary agent.

[0081] Embodiment 17

[0082] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that 1.2 parts by weight of glucomannan palmitate is also added to the components of the molecular enhancement auxiliary agent.

[0083] Embodiment 18

[0084] A long-lasting fragrance essence for microcapsules, which is different from Example 7 in that glucomannan palmitate is also added to the components of the molecular strengthening auxiliary agent, and the mass ratio of glucomannan palmitate, glyceryl monostearate and sorbitan monostearate is 0.7:0.9:1.5.

[0085] Embodiment 19

[0086] A long-lasting fragrance essence for microcapsules, which is different from Example 13 in that glucomannan palmitate is also added to the components of the molecular strengthening auxiliary agent, and the mass ratio of glucomannan palmitate to glyceryl monostearate is 0.7:0.9.

[0087] Embodiment 20

[0088] A long-lasting fragrance essence for microcapsules, which is different from Example 14 in that glucomannan palmitate is also added to the components of the molecular strengthening auxiliary agent, and the mass ratio of glucomannan palmitate to sorbitan monostearate is 0.7:1.5.

[0089] Embodiment 21

[0090] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the solvent is isopropyl myristate.

[0091] Embodiment 22

[0092] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the solvent is dipropylene glycol.

[0093] Comparative Example

[0094] Comparative Example 1

[0095] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the stabilizing mixing auxiliary agent is carboxymethyl cellulose.

[0096] Comparative Example 2

[0097] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the stabilizing mixing auxiliary agent is xanthan gum.

[0098] Comparative Example 3

[0099] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that the stabilizing mixing auxiliary agent is modified starch.

[0100] Comparative Example 4

[0101] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of carboxymethyl cellulose and xanthan gum in a mass ratio of 2:1.

[0102] Comparative Example 5

[0103] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of carboxymethyl cellulose and modified starch in a mass ratio of 2:16.

[0104] Comparative Example 6

[0105] A long-lasting fragrance essence for microcapsules, which is different from Example 1 in that a stabilizing mixing aid is composed of xanthan gum and modified starch in a mass ratio of 1:16.

[0106] Comparative Example 7

[0107] A long-lasting fragrance essence for microcapsules is different from Example 1 in that the quality of the stabilizing mixing aid is replaced by a solvent.

[0108] Performance test samples: The long-lasting fragrance essence for microcapsules obtained in Examples 1-22 was used as Example test sample 1-22, and the long-lasting fragrance essence for microcapsules obtained in Comparative Examples 1-7 was used as Comparative Example control sample 1-7.

[0109] Test method: Test samples 1-22 and control samples 1-7 were used as core materials, pullulan was used as microcapsule wall material, the core material and the wall material were mixed evenly at a mass ratio of 1:1, and then spray-dried to obtain 29 kinds of microcapsule flavors; the 29 kinds of microcapsule flavors were added to the impregnation liquid, the mass ratio of the microcapsule flavor and the impregnation liquid was 1:5, wherein the impregnation liquid was the American Solvay D 2530F impregnation emulsion, and 29 kinds of impregnation mixed liquids were obtained by mixing evenly; 29 fabrics of 2cm*2cm size were taken as standard linings, the fabrics were needle-punched non-woven fabrics provided by Dongguan Zhuofang Industrial Co., Ltd., and then the standard linings were immersed in each impregnation mixed liquid at 40°C for 30min, and then the liquid rate was 80% after immersion rolling, pre-baked at 80°C for 1min, and baked at 100°C for 2min, to obtain 29 standard samples. Place the standard sample in the same environment, rub it to the same extent, and make the wall material completely damaged. Then, after 20 minutes, measure the remaining percentage of the flavor core material, and record the time required when the flavor as the core material is completely released.

[0110] Table 2 Test results of test samples 1-22 and control samples 1-7

[0111]

[0112]

[0113] It can be seen from Examples 1-6 and Comparative Examples 1-7 and Table 2 that when carboxymethyl cellulose, xanthan gum and modified starch are used as a stable mixing aid in a specific mass ratio, the initial release of the product will not be so intense when it is affected by friction heat, the release is less, the retention amount is larger, and the overall release of the fragrance is more durable. However, when any one or two of carboxymethyl cellulose, xanthan gum and modified starch are used as stable mixing aids, the improvement effect brought by them is limited, which is far less than the excellent effect brought by the combination of the three.

[0114] It can be seen from Example 1, Examples 7-12 and Examples 13-14 and Table 2 that the addition of a molecular enhancement agent of glyceryl monostearate and sorbitol monostearate in a specific mass ratio can effectively suppress the fierceness of the early fragrance release when affected by friction heat, and achieve an excellent long-lasting fragrance effect. The selection of either glyceryl monostearate or sorbitol monostearate as a molecular enhancement agent has limited enhancement effects.

[0115] It can be seen from Example 7, Example 15-18 and Example 19-20 and Table 2 that adding palmitic acid glucomannan ester to the components of the molecular strengthening auxiliary agent, and in combination with glyceryl monostearate and sorbitol monostearate, the influence of friction heat on the microcapsule long-lasting fragrance essence is greatly reduced, thereby greatly improving the long-lasting fragrance effect of the microcapsule long-lasting fragrance essence. However, the use of any one of glyceryl monostearate and sorbitol monostearate in combination with palmitic acid glucomannan ester has limited improvement effects, and only when the mass ratio of palmitic acid glucomannan ester, glyceryl monostearate and sorbitol monostearate is 0.7:0.9:1.5, the overall improvement effect is the most excellent.

[0116] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A long-lasting fragrance for microcapsules, characterized in that: The microcapsule long-lasting fragrance essence is composed of the following components in parts by weight: 0.1-1 part of ethyl 2-methylbutyrate; 1-5 parts of geraniol; 1-5 parts of nerol; 1-5 parts of fresh alcohol; 1-5 parts of diphenyl ether; Ligustrum lucidum 1-5 parts; 1-5 parts of hexyl salicylate; 1-5 parts of methylnonane acetaldehyde; 5-10 parts of dihydromyrcenol; 5-10 parts of hexyl acetate; 5-10 parts of phenylethyl acetate; 25-30 parts of tricyclodecenyl acetate; 25-30 parts of solvent; 2-6 parts of stabilizing mixing aid; The stabilizing mixing aid is composed of the following components in parts by weight: carboxymethyl cellulose, xanthan gum and modified starch, and the mass ratio of the carboxymethyl cellulose, xanthan gum and modified starch is (1.7-2.3):1: (14-19).

2. The long-lasting fragrance essence for microcapsules according to claim 1, characterized in that: The mass ratio of the carboxymethyl cellulose, xanthan gum and modified starch is 2:1:

16.

3. The long-lasting fragrance essence for microcapsules according to claim 1, characterized in that: The components of the microcapsule long-lasting fragrance essence also include 1-3 parts by weight of a molecular enhancement aid, which includes the following components: glyceryl monostearate and sorbitan monostearate, and the mass ratio of glyceryl monostearate to sorbitan monostearate is (0.4-0.7):

1.

4. The long-lasting fragrance essence for microcapsules according to claim 3, characterized in that: The mass ratio of the glyceryl monostearate to the sorbitan monostearate is 0.6:

1.

5. The long-lasting fragrance essence for microcapsules according to claim 3, characterized in that: 0.5-1.2 parts by weight of glucomannan palmitate is also added to the components of the molecular strengthening auxiliary agent.

6. The long-lasting fragrance essence for microcapsules according to claim 3, characterized in that: The molecular strengthening auxiliary component also contains glucomannan palmitate, and the mass ratio of glucomannan palmitate, glyceryl monostearate and sorbitan monostearate is 0.7:0.9:1.

5.

7. The long-lasting fragrance essence for microcapsules according to claim 1, characterized in that: The solvent is selected from any one of cyclohexyl salicylate, isopropyl myristate and dipropylene glycol.

8. The method for preparing the long-lasting fragrance for microcapsules according to claim 1, characterized in that: The following steps are involved: (1) preparing raw materials including ethyl 2-methylbutyrate, geraniol, nerol, citronellol, diphenyl ether, privet aldehyde, hexyl salicylate, methyl nonane acetaldehyde, dihydromyrcenol, hexyl acetate, phenylethyl acetate, tricyclodecenyl acetate, solvent and stabilizing mixing aid according to the proportion; (2) The raw materials in step (1) are placed in a stirring container and stirred and mixed. After the stirring and mixing are uniform, the obtained mixed liquid is subjected to high-pressure homogenization to obtain a long-lasting fragrance essence for microcapsules.

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