Bentonite microcapsule fragrance particle, preparation method and application of bentonite microcapsule fragrance particle in washing powder with long-acting fragrance

Abstract

The invention discloses bentonite microcapsule fragrance particles, a preparation method of the bentonite microcapsule fragrance particles and application of the bentonite microcapsule fragrance particles in washing powder with long-acting fragrance, and belongs to the technical field of washing powder application. The invention discloses bentonite microcapsule fragrance particles, which are prepared from 65 to 75 percent of granular bentonite, 2 to 10 percent of liquid microcapsule essence, 2.0 percent of fine powdery bentonite, 12.5 to 30 percent of granular sodium chloride and 0.5 to 2.0 percent of water, and the preparation method comprises the following steps: mixing the granular bentonite, the granular sodium chloride and the liquid microcapsule essence, spraying water, adding the fine powdery bentonite, mixing to obtain the bentonite microcapsule fragrance particles, and drying to obtain the bentonite microcapsule fragrance particles. The long-acting fragrance-retaining washing powder contains 2-10% by mass of bentonite microcapsule fragrance particles, the long-acting fragrance-retaining washing powder is applied to fabric washing after being stored for 4-8 weeks, and after the long-acting fragrance-retaining washing powder is aired, the fabric can still keep fragrance after being stored for 7-14 days.

Description

Technical Field

[0001] The invention belongs to the technical field of daily chemical detergents, and in particular relates to the technical field of long-lasting fragrance washing powder. Background Art

[0002] At present, consumers are increasingly fond of scented detergents. Liquid detergent products such as laundry beads, laundry detergent, and softener have been popular with consumers for their main selling points of 72 hours, 120 hours, 7 days or longer fragrance retention time. The reason why such long-lasting fragrance can be achieved is that with the advancement of technology, flavor manufacturers have adopted a new technology - microcapsule flavor manufacturing technology: various flavors, plant essential oils and other raw materials are wrapped with water-insoluble wall materials to make flavor capsules, so that the inner core of the flavor is isolated from the outside world, and then the wrapped flavor capsules are suspended in a water-based liquid dispersant. The obtained microcapsule flavor is easy to add to liquid detergents. The wall material of microcapsule fragrance is insoluble in water and will not dissolve in water. It is adsorbed on the fabric during washing and will not be emulsified by detergent and washed away with water. When the wall material of microcapsule fragrance is dried and brittle after drying, the outer wall will be broken under the action of external force, and the fragrance inside will be released to produce fragrance. Therefore, after washing with detergent containing microcapsule fragrance, the clothes will produce fragrance when worn and rubbed, which is also called "friction fragrance". Compared with ordinary liquid fragrance, because microcapsule fragrance will not lose fragrance during storage and washing, and the capsule will not be completely broken when not worn after washing, detergent with microcapsule fragrance can achieve a long-lasting fragrance effect.

[0003] Liquid microcapsule fragrance is a milky white viscous liquid, in which the water-based dispersion contains more than 60% water, so that the microcapsule wall material is always in a water-protected state, and will not break before use. When added to liquid detergents, it is still in a water environment, and the liquid microcapsule fragrance is not easy to break, and it can also be easily added to liquid detergents. Moreover, liquid detergents are usually low-alkalinity or neutral, and the degree of damage to liquid microcapsule fragrance is relatively less than that of washing powder, so liquid microcapsule fragrance has been widely used in liquid detergents.

[0004] However, how to keep liquid microcapsule fragrance stable in washing powder and how to conveniently add it into washing powder to produce long-lasting fragrance washing powder are still technical problems that need to be solved. The main technical difficulties are reflected in the following aspects: 1. Ordinary fragrance is a dilute solution with ethanol or other solvents, with almost no viscosity, which is very conducive to being added to washing powder by atomization. Ordinary fragrance can easily penetrate into washing powder and mix evenly with washing powder, which will not cause local agglomeration of washing powder. Liquid microcapsule fragrance is a viscous liquid, so the adding device used for ordinary fragrance in the preparation process of washing powder cannot atomize liquid microcapsule fragrance well. Liquid microcapsule fragrance with poor atomization will gather on the surface of washing powder.

[0005] 2. The commonly used method at present is to use a special high-pressure spray device to spray the liquid microcapsule fragrance into the washing powder at ultra-high pressure. The disadvantage of this addition process is that it requires the installation of additional fragrance adding equipment (high-pressure atomizing pump, ultra-fine nozzle, liquid capsule fragrance storage tank, etc.), because the small-aperture nozzle can atomize the liquid microcapsule fragrance into finer droplets, but the nozzle aperture is small and it is easy to be stuck by the liquid microcapsule fragrance and cannot work, resulting in frequent cleaning, waste of fragrance, waste of working hours, and thus increase in production costs.

[0006] 3. The external force of high-pressure atomization will cause the capsule wall of the liquid microcapsule flavor to partially rupture, causing the aroma to be lost prematurely. It is necessary to increase the amount of liquid microcapsule flavor added to achieve the effect of long-lasting fragrance, which increases the cost.

[0007] 4. The atomized liquid microcapsule fragrance is in direct contact with the washing powder. The peroxides (percarbonate, perborate), nonionic surfactants, high alkaline raw materials (silicate, metasilicate, soda ash, etc.) in the washing powder are in direct contact with the capsule wall of the liquid microcapsule fragrance, which will accelerate the rupture of the capsule wall of the microcapsule fragrance, thereby affecting the long-term storage stability of the liquid microcapsule fragrance in the washing powder. In addition, because the liquid microcapsule fragrance contains more than 60% water, the water in the liquid microcapsule fragrance is in direct contact with the peroxide in the washing powder, which will accelerate the oxygen release of the peroxide, thereby accelerating the destruction of the odor of the liquid microcapsule fragrance and ordinary fragrance. In severe cases, the capsule wall material of the liquid microcapsule fragrance will react with the peroxide and alkaline raw materials in the washing powder to produce an unpleasant odor.

[0008] In summary, how to conveniently add liquid microcapsule fragrance into washing powder and ensure that the liquid microcapsule fragrance remains stable and not destroyed during the production and long-term storage of washing powder is a technical problem that needs to be solved urgently. Applying liquid microcapsule fragrance to the formula of washing powder with high alkalinity, high non-ionic surfactant and peroxide to achieve long-lasting fragrance is an even greater technical problem. Summary of the invention

[0009] One of the purposes of the present application is to provide a bentonite microcapsule fragrance particle in order to solve the above-mentioned technical problem. The bentonite microcapsule fragrance particle can make the liquid microcapsule fragrance stable and not easily destroyed during the production and long-term storage of washing powder.

[0010] The second purpose of the present application is to provide a method for preparing bentonite microcapsule fragrance particles. The bentonite microcapsule fragrance particles obtained by the preparation method can well wrap the liquid microcapsule fragrance in the bentonite, and will not cause the liquid microcapsule fragrance wall material to break due to factors such as drying and water loss.

[0011] The third purpose of the present application is to provide a long-lasting fragrance washing powder, which can retain the fragrance for a long time after the washing powder is stored for a long time.

[0012] The fourth purpose of the present application is to provide a method for preparing the above-mentioned long-lasting fragrance washing powder, which solves the technical problem that liquid microcapsule fragrance is difficult to add into washing powder and is suitable for large-scale production.

[0013] Technical principle of this application The granular bentonite is pre-mixed with the liquid microcapsule fragrance for the first time, so that the liquid microcapsule fragrance is first absorbed into the pores of the bentonite particles, and then allowed to stand for 3-5 minutes to allow the liquid microcapsule fragrance to be fully absorbed into the pores of the granular bentonite particles. The obtained bentonite particles adsorbed with the liquid microcapsule fragrance are evenly sprayed with water and then mixed with fine powdered bentonite for the second time, so that the outer layer of the bentonite particles adsorbed with the liquid microcapsule fragrance prepared after the first mixing is further wrapped with a dense bentonite shell. The finally obtained bentonite microcapsule fragrance particles can be directly added to the washing powder and mixed to form a long-lasting and fragrant washing powder.

[0014] Furthermore, after the bentonite microcapsule fragrance particles finally obtained are used in washing powder, the fine powdered bentonite on the outer layer of the bentonite microcapsule fragrance particles can continue to absorb trace water in other raw materials of the washing powder, such as sodium carbonate, sodium sulfate, etc., and the absorbed water can form a water-containing layer in the fine powdered bentonite particles, so that the liquid microcapsule fragrance is always in a water-containing state, that is, a dense bentonite layer is formed on the outside of the liquid microcapsule fragrance, thereby reducing the rupture of the capsule wall material caused by the liquid microcapsule fragrance due to drying and water loss during long-term storage of the washing powder, so that the liquid microcapsule fragrance can be stored intact for a long time in the washing powder, thereby keeping the fabric fragrant for a long time after washing; at the same time, the dense bentonite layer on the surface of the bentonite microcapsule fragrance particles makes it have very good fluidity and can be very conveniently added to any washing powder formula, solving the problem that the liquid microcapsule fragrance is difficult to add to the washing powder.

[0015] The technical solution of this application In the first aspect, the present application provides a bentonite microcapsule fragrance particle, which adopts the following technical solution: A bentonite microcapsule fragrance particle, the raw materials used in the preparation are calculated by mass percentage, and the composition and content are as follows: The particle size of the granular bentonite>the particle size of the granular sodium chloride>the particle size of the fine powdered bentonite>the particle size of the liquid microcapsule flavor; The granular bentonite or fine powdered bentonite is the same, all of which are sodium-based, calcium-based or magnesium-based bentonite, preferably sodium-based bentonite; this application only uses sodium-based bentonite particles with different particle sizes to secondary encapsulate liquid microcapsule flavors to obtain bentonite microcapsule fragrance particles as an example, but this method is also applicable to calcium-based or magnesium-based bentonite to secondary encapsulate liquid microcapsule flavors to prepare bentonite microcapsule fragrance particles.

[0016] By adopting the above technical scheme, the bentonite microcapsule fragrance particles can stably encapsulate the liquid microcapsule fragrance in the bentonite due to the use of various raw materials with graded particle sizes, thereby ensuring the long-term storage of the liquid microcapsule fragrance in the washing powder and the long-lasting fragrance of the washing powder after use.

[0017] Preferably, the raw materials used in the preparation of bentonite microcapsule fragrance particles are calculated by mass percentage, and their composition and content are as follows: Granular bentonite 70-75% Liquid microencapsulated flavor 5-10% Fine powdered bentonite 2% Granular Sodium Chloride 12.5-25% Water 0.5-2.0%.

[0018] By adopting the above technical solution, the bentonite microcapsule fragrance particles can be applied to laundry detergent for long-term storage and long-lasting fragrance.

[0019] Preferably, the granular bentonite has a particle size of 0.2 mm to 2.0 mm, and the weight proportion of particles with a particle size of 0.5 mm to 1.6 mm is ≥ 80%, and the water content is 2 to 6%; The average particle size of fine powdered bentonite is 44 μm, and the moisture content is 2-6%. The particle diameter of the liquid microcapsule flavor is 5 μm to 15 μm. The liquid microcapsule flavor is suitable for use in the detergent industry and is applicable to the present application. In each embodiment of the present application, only the QM series of liquid microcapsule flavors of IFF Company are used as examples for illustration, but other commercially available liquid microcapsule flavors are not limited to be used in the present application. The particle size of the above-mentioned granular sodium chloride is 0.2mm-1.0mm.

[0020] By adopting the above technical scheme, two kinds of bentonite with specific particle sizes are used to carry out secondary wrapping of the liquid microcapsule fragrance, so that the liquid microcapsule fragrance is well wrapped in the bentonite, and a dense bentonite layer is formed on the outside of the liquid microcapsule fragrance, so that the bentonite microcapsule fragrance particles can maintain a long-lasting fragrance.

[0021] In a second aspect, the present application provides a method for preparing the above-mentioned bentonite microcapsule fragrance particles, using the following technical scheme: A method for preparing bentonite microcapsule fragrance particles specifically comprises the following steps: (1) The first encapsulation of liquid microcapsule essence by granular bentonite: The granular bentonite, granular sodium chloride and liquid microcapsule essence are mixed evenly to obtain the bentonite granules adsorbed with the liquid microcapsule essence; (2) Second encapsulation of liquid microcapsule essence by fine powdered bentonite: Under stirring, water is added to the bentonite particles adsorbed with liquid microcapsule fragrance obtained in step (1) by spraying, and then fine powdered bentonite is added under continued stirring to obtain bentonite microcapsule fragrance particles.

[0022] By adopting the above technical solution, since two kinds of bentonite with specific particle sizes are used to perform secondary encapsulation of the liquid microcapsule fragrance, the liquid microcapsule fragrance is well and stably encapsulated in the bentonite, and a dense bentonite layer is formed on the outside of the liquid microcapsule fragrance, so that the bentonite microcapsule fragrance particles can be used in the laundry detergent for long-term storage and long-lasting fragrance. Furthermore, when the bentonite microcapsule fragrance particles containing liquid microcapsule fragrance obtained by the preparation method are used in the preparation of washing powder, the capsule wall material rupture caused by the liquid microcapsule fragrance losing water due to drying in the environment during long-term storage of the washing powder is reduced, so that the liquid microcapsule fragrance can be stored intact in the washing powder for a long time. At the same time, since the surface of the bentonite microcapsule fragrance particles has a dense bentonite layer, it has very good fluidity and can be very conveniently added to any washing powder formula, that is, the problem of difficulty in adding liquid microcapsule fragrance to washing powder is solved; Furthermore, the preparation method can effectively prevent the bentonite particles and the liquid microcapsule essence from forming large lumps when they are mixed, because a certain amount of granular sodium chloride with a diameter of 0.2 mm-1.0 mm is added to the granular bentonite and then mixed with the liquid microcapsule essence. The mixing process can be carried out in simple equipment without the need for cooling equipment, thereby reducing the energy consumption used for cooling, that is, solving the technical problem that the traditional sodium-based bentonite particles heat up when in contact with water, expand and aggregate into lumps.

[0023] Preferably, in the process of mixing the granular bentonite, granular sodium chloride and liquid microcapsule flavor in step (1) of the above preparation process, the granular bentonite and granular sodium chloride are firstly stirred and mixed at a speed of 4-5 r / min, and then the liquid microcapsule flavor is added, mixed and then allowed to stand for 3-5 minutes.

[0024] By adopting the above technical scheme, while ensuring the order of adding granular bentonite, granular sodium chloride and liquid microcapsule flavor, and controlling a certain rotation speed for mixing and static treatment after mixing, the synergistic effect promotes the liquid microcapsule flavor to fully enter the micropores of the granular bentonite, and at the same time, the liquid microcapsule flavor is stably present in the granular bentonite particles.

[0025] Preferably, the water is added by spraying in step (2) of the above preparation process, that is, water is added to the obtained bentonite particles adsorbed with liquid microcapsule flavor under the condition of controlling the stirring speed to 4-5r / min, and the aperture of each spray hole of the spraying equipment used for spraying is 0.5mm-1.0mm, and the water pressure is 2.0-2.5Mpa.

[0026] The above technical solution is adopted to control the caliber of the spray hole of the spray equipment and the pressure of the water spray, and at the same time control the spray-type water addition under the stirring condition of 4-5r / min (controlling the caliber of the spray hole of the spray equipment and the water spray pressure can make the spray water atomized into fine droplets, preventing uneven water spraying from causing the surface of the bentonite particles adsorbed with liquid microcapsule essence to be too wet locally and stick to large clumps, and controlling the appropriate stirring speed too high or too low can easily cause the bentonite particles adsorbed with liquid microcapsule essence to be crushed, thereby generating high heat, causing the adsorption of liquid microcapsule essence The bentonite particles adsorbing liquid microcapsule fragrance can be bonded to the bentonite particles, so the diameter of the spray hole of the spraying equipment and the pressure of the water spraying are controlled, and the water is sprayed at a suitable stirring speed. The surface of the bentonite particles adsorbing liquid microcapsule fragrance can absorb water evenly, so that the surface can adhere to the fine powdered bentonite more evenly, and finally a denser layer of water-containing bentonite is formed on the surface of the bentonite microcapsule fragrance particles, so that the obtained bentonite microcapsule fragrance particles have better fluidity and can be more conveniently added to any laundry detergent formula; Furthermore, due to the spraying type water addition under stirring conditions, the surface humidity of the bentonite particles adsorbed with the liquid microcapsule flavor can be uniformly increased, so that the surface of the bentonite particles adsorbed with the liquid microcapsule flavor can better and evenly bond with the fine powdered bentonite, and at the same time, the liquid microcapsule flavor adsorbed in the granular bentonite particles can be moisturized to prevent the liquid microcapsule flavor from rupturing.

[0027] Preferably, in step (2) of the above preparation process, after adding fine powdered bentonite under stirring, the rotation speed is continued to be controlled at 4-5 r / min for stirring for 2-3 minutes to obtain bentonite microcapsule fragrance particles with a particle size of 0.25 mm-2.5 mm.

[0028] By adopting the above technical solution, the fine powdered bentonite can be more evenly wrapped on the surface of the granular bentonite, forming a dense shell structure outside the granular bentonite.

[0029] In a third aspect, the present application provides a long-lasting fragrance washing powder containing bentonite microcapsule fragrance particles, which adopts the following technical solution: A long-lasting fragrance washing powder, the raw materials used for its preparation, calculated by mass percentage, contain 2-10% of the above-mentioned bentonite microcapsule fragrance particles.

[0030] By adopting the above technical solution, since a certain amount of bentonite microcapsule fragrance particles are contained in the washing powder, the washing powder can still retain fragrance for a long time after long-term storage.

[0031] Furthermore, the raw materials used in the preparation of the above-mentioned long-lasting fragrance laundry detergent containing bentonite microcapsule fragrance particles also include spray-dried base powder, non-ionic surfactant, sodium percarbonate, alkaline builder, ordinary liquid fragrance and anhydrous sodium sulfate or refined salt; The above-mentioned long-lasting fragrance laundry detergent containing bentonite microcapsule fragrance particles, the raw materials used in its preparation are calculated by mass percentage, and its composition and content are as follows: The spray-dried base powder is a base powder used in washing powder produced by high tower spraying, and its main components are raw materials such as sodium alkylbenzene sulfonate, sodium carbonate, sodium silicate and sodium aluminosilicate. In the embodiments of the present application, only the base powder used in the white cat cold water quick-cleaning washing powder produced by Shanghai Hutchison White Cat Group Co., Ltd. is used as an example for explanation, but other base powders used in the production of washing powder by high tower spraying are applicable to the present application; The nonionic surfactant is a fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is AEO7, AEO8, AEO9 or AEO10; in the specific implementation of the present application, only fatty alcohol polyoxyethylene ether AEO9 with a content of ≥99.9% produced by BASF is used as an example for illustration, and it can also be replaced by domestic brands produced by Sanjiang Chemical Co., Ltd. or other companies; The alkaline builder is sodium carbonate, sodium silicate or sodium aluminosilicate; Ordinary liquid fragrance. In the embodiments of this application, only the lavender-scented daily chemical fragrance of Symrise is used as an example for illustration, but the use of commercially available ordinary liquid fragrance suitable for use in the detergent industry in this application is not limited; Anhydrous sodium sulfate can be replaced by refined salt.

[0032] By adopting the above technical scheme, the long-lasting fragrance washing powder contains the above-mentioned bentonite microcapsule fragrance particles, which improves the stability of the liquid microcapsule fragrance in the washing powder with high alkalinity, sodium percarbonate and high non-ionic surfactant. Therefore, after the long-lasting washing powder of the present application is stored for a considerable period of time, it can be used to wash the fabric, and the washed fabric still has a good fragrance effect.

[0033] More preferably, the raw materials used in the preparation of the above-mentioned long-lasting fragrance washing powder contain 5-10% bentonite microcapsule fragrance particles by mass percentage.

[0034] By adopting the above technical scheme, after the long-lasting fragrance washing powder is stored in a constant temperature and humidity environment of 37°C and 85% relative humidity for 8 weeks (equivalent to more than 2 years of storage at room temperature), the fabrics washed and dried with it still have a good fragrance retention effect after being stored for 14 days.

[0035] In a fourth aspect, the present application provides a method for preparing the above-mentioned long-lasting fragrance washing powder, using the following technical scheme: A method for preparing a long-lasting fragrance washing powder, comprising the following steps: 1. Preparation of bentonite microcapsule fragrance particles The method for preparing bentonite microcapsule fragrance particles as described above finally obtains bentonite microcapsule fragrance particles; (2) Add spray-dried base powder, alkaline detergent, anhydrous sodium sulfate, bentonite microcapsule fragrance particles in the container in sequence, and then control the stirring speed to 4-5 r / min for stirring for 1-2 minutes, then add non-ionic surfactant and ordinary liquid fragrance under stirring, and continue to control the stirring speed to 4-5 r / min for stirring for 1-2 minutes after adding, and then add sodium percarbonate and control the stirring speed to 4-5 r / min for stirring for 3-4 minutes and then stop stirring to obtain a long-lasting fragrance washing powder.

[0036] The long-lasting fragrance washing powder containing bentonite microcapsule fragrance particles obtained above is a washing powder containing liquid microcapsule fragrance, alkaline builder (high alkalinity), sodium percarbonate and non-ionic surfactant.

[0037] The above technical scheme is used to prepare a long-lasting fragrance washing powder. Since bentonite microcapsule fragrance particles obtained by twice encapsulating liquid microcapsule fragrance with different particles of bentonite are used as raw materials, the liquid microcapsule fragrance is well and stably encapsulated in the bentonite, and a dense bentonite layer is formed on the outside of the liquid microcapsule fragrance, so that the obtained washing powder can maintain a long-lasting fragrance after long-term storage; Furthermore, a method for preparing a long-lasting fragrant laundry detergent has simple equipment and is easy to operate. At the same time, the inventor of the present application has proved in practice that the preparation method can be produced on a large scale without causing the liquid microcapsule fragrance to be destroyed due to large external forces during large-scale production.

[0038] Beneficial technical effects of this application The bentonite microcapsule fragrance particles of the present application can stably encapsulate the liquid microcapsule fragrance in the bentonite due to the use of various raw materials with graded particle sizes, thereby providing a guarantee for the liquid microcapsule fragrance in the preparation of long-lasting fragrance laundry detergent.

[0039] Furthermore, in the preparation method of bentonite microcapsule fragrance particles of the present application, two bentonites with different particle sizes are used to perform secondary encapsulation of liquid microcapsule fragrance, so that the liquid microcapsule fragrance is well and stably encapsulated in the bentonite, and a dense bentonite layer is formed on the outside of the liquid microcapsule fragrance, so that the liquid microcapsule fragrance has very good fluidity and can be very conveniently added to any washing powder formula, that is, the problem that the liquid microcapsule fragrance is difficult to add to the washing powder in the prior art is solved; Furthermore, the preparation method of bentonite microcapsule fragrance particles of the present application can effectively prevent the formation of large lumps when the granular bentonite and the liquid capsule fragrance are mixed, because a certain amount of granular sodium chloride with a diameter between 0.2mm and 1.0mm is added to the granular bentonite and then mixed with the liquid microcapsule fragrance, so that the mixing process can be carried out in simple equipment without the need for cooling equipment, thereby reducing the energy consumption used for cooling, that is, solving the technical problem that traditional sodium-based bentonite particles heat up when encountering water, expand and aggregate into lumps.

[0040] Furthermore, the long-lasting fragrance washing powder of the present application, because the liquid microcapsule fragrance is in the form of bentonite microcapsule fragrance particles as a raw material, the liquid microcapsule fragrance remains stable in the washing powder with high alkalinity, sodium percarbonate and high non-ionic surfactant.

[0041] Furthermore, the present application discloses a method for preparing a long-lasting fragrance washing powder. Since the raw material bentonite microcapsule fragrance particles used in the preparation are obtained by secondary wrapping of liquid microcapsule fragrance with bentonite of different particle sizes, the liquid microcapsule fragrance is well wrapped in the bentonite, and the wall material will not be broken due to factors such as drying and water loss. Therefore, the bentonite microcapsule fragrance particles not only solve the problem that liquid microcapsule fragrance is difficult to add to washing powder, but also enable the liquid microcapsule fragrance to be stored intact for a long time in the washing powder, and the fabric can maintain a long-lasting fragrance after washing. After being stored in a constant temperature and humidity environment at a temperature of 37°C and a relative humidity of 85% for 8 weeks (equivalent to storage at room temperature for more than 2 years), the long-lasting fragrance washing powder still has a good fragrance retention effect after washing fabrics with it and drying them and leaving them for 14 days.

[0042] Furthermore, the present application provides a method for preparing a long-lasting fragrance laundry detergent. Since the bentonite microcapsule fragrance particle raw material used in the preparation can be smoothly prepared in an ordinary vertical double-helix mixer without the need for cooling equipment, the preparation process of the long-lasting laundry detergent is simple, thereby effectively reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 , a microscope image of the raw material granular bentonite used in Example 1 of the present application at 50 times magnification; Figure 2 , a microscope image of the raw material granular bentonite used in Example 1 of the present application at 100 times magnification; Figure 3 , a microscope image at 50 times magnification of the bentonite particles adsorbed with colored liquid microcapsule flavor obtained in step (1) of Example 1 of the present application; Figure 4 , a microscope image at 50 times magnification of the bentonite microcapsule fragrance particles obtained by encapsulating the colored liquid microcapsule fragrance with bentonite for the second time in step (2) of Example 1 of the present application. DETAILED DESCRIPTION

[0044] The technical solution of the present application is described in detail below through specific embodiments and in combination with the accompanying drawings, but the present application is not limited thereto.

[0045] The raw materials used in the examples of this application, except for those commercially available, the specifications and manufacturer information of other raw materials are as follows: 1. The granular bentonite is sodium bentonite with a particle size of 0.2 mm to 2.0 mm, of which the weight proportion of particles with a particle size of 0.5 mm to 1.5 mm is ≥ 80%, and the moisture content is 2 to 6%, Mineralstechnologies (Tianjin) Mining Co., Ltd., model Quest S003; 2. Liquid microcapsule flavor, QMF0023 in the QM series with a particle size of 5 to 15 μm, produced by International Flavors & Fragrance (China) Co., Ltd. (IFF for short); 3. Fine powdered bentonite, with a moisture content of 2-6% and an average particle size of 44 μm, produced by Hebei Lingshou Xuyang Mining Co., Ltd.; 4. Granular sodium chloride, particle size 0.2-1.0 mm, commercially available; 5. Spray-dried base powder, the base powder used in the White Cat Cold Water Quick Cleaning Laundry Detergent produced by Shanghai Hutchison White Cat Group Co., Ltd. through high tower spraying; 6. Nonionic surfactant, fatty alcohol polyoxyethylene ether AEO9, content ≥ 99.9%, produced by BASF; 7. Sodium percarbonate, in compliance with the coating type standard of HG / T2764-2013, produced by Zhejiang Jinke Chemical Co., Ltd. 8. Alkaline detergent, Class II first-class product in GB / T210-2022, commercially available; 9. Ordinary liquid fragrance, lavender-scented daily chemical fragrance from Symrise; 10. Anhydrous sodium sulfate, Class II first-class product in GB / T6009-2014, commercially available; 11. Refined sodium chloride, in compliance with GB / T5461-2016 standard, commercially available.

[0046] The vertical double-helix conical mixer used in the preparation of the washing powder in the embodiment of the present application is of model ZLH and is manufactured by Shanghai Shengang Machinery Factory; The polarizing microscope used for measurement in the examples of the present application is Motic BA310Pol.

[0047] The present application discloses a method for evaluating the storage and long-lasting fragrance effect of a long-lasting fragrance washing powder, and the specific steps are as follows: (1) Selection of incense reviewers: 5 incense reviewers will be selected; (2) Take 20g of samples of the long-lasting fragrance washing powder obtained in each embodiment or comparative example after storage (stored in a constant temperature and humidity environment at a temperature of 37°C and a relative humidity of 85% for 24h, 1 week, 4 weeks, and 8 weeks), and then put them into drum washing machines of the same model (model EG8014BDX59STU1, produced by Haier Company), add four unused white pure cotton towels to each drum washing machine, wash them according to the standard washing program set on the drum washing machine, take them out, dry them at room temperature, and then store them for different time periods (sealed and stored at room temperature for 24h, 72h, 7 days, and 14 days), and then evaluate the fragrance of the fabrics (towels) that have been stored for different storage time periods (stored in a constant temperature and humidity environment at a temperature of 37°C and a relative humidity of 85% for 24h, 1 week, 4 weeks, and 8 weeks) after washing and drying with the long-lasting fragrance washing powder and then stored for different time periods (sealed and stored at room temperature for 24h, 72h, 7 days, and 14 days); (3) Fragrance evaluation indicators include whether there is lingering fragrance and fragrance intensity; The rules for scoring the fragrance evaluation indicators are as follows: Whether there is fragrance left, each person's score result: the comprehensive score of the four towels is used to judge, 1 point for fragrance left, 0 point for no fragrance left; The fragrance retention result is the sum of the evaluation results of 5 people; The intensity of the fragrance was scored, and each person's score was judged based on the comprehensive results of the four towels, with obvious fragrance at 2 points, slight fragrance at 1 point, and no fragrance at 0 points; The fragrance lasting strength was evaluated by adding up the evaluation results of 5 people.

[0048] In order to better realize the present application, the inventors of the present application have made the following explanations on the technical difficulties encountered in the practice of the preparation process of bentonite microcapsule fragrance particles and how to solve the difficulties: 1. Selection of bentonite for the first and second wrapping Since the bentonite microcapsule fragrance particles in the present application are used in washing powder, if calcium or magnesium-based bentonite is selected, the calcium or magnesium ion content in the washing powder will increase, reducing the detergency of the washing powder, so the bentonite used for the first and second packages is preferably sodium-based bentonite particles; When the amount of bentonite microcapsule fragrance particles added to the washing powder is not large and the detergent has little impact on detergency, the bentonite used for the first and second packages can be selected according to the needs. Calcium or magnesium-based bentonite; 2. Selection of granular bentonite particles for the first bentonite coating It is known from the known technology that the finer the bentonite particle size, the stronger the adsorption effect. That is to say, if you want good adsorption performance, you should choose powdered bentonite with a tiny particle size, rather than the granular bentonite in the technical solution of this application. The usual bentonite powder particle size is between 0.001-0.05mm, that is, the particle size is between 1-50μm, and the adsorption of bentonite is mainly achieved through the microporous structure it has, and the micropore diameter of bentonite is a few nm. Obviously, the liquid microcapsule fragrance with a particle size of 5-15μm cannot be absorbed into the micropores of the usual bentonite powder. If the liquid microcapsule fragrance cannot be adsorbed into the bentonite pores, it will aggregate on the bentonite surface due to the viscosity of the liquid microcapsule fragrance, affecting the long-lasting fragrance of the final washing powder. This shows that the adsorption material of the liquid microcapsule fragrance needs to have larger pores in order to allow the liquid microcapsule fragrance to enter the interior of the adsorption material. Therefore, it is necessary to use bentonite with larger pores, that is, granular bentonite; One particle of the granular bentonite is formed by bonding several fine bentonite particles into a large particle with an uneven surface and a certain diameter. A large pore structure is formed between the fine bentonite particles of the large particle. The pore diameter of the pore structure can reach about 50-100 μm, so that the liquid microcapsule flavor (particle diameter is 5-15 μm) can enter the interior of the granular bentonite through the pores for protection. At the same time, the uneven surface of the granular bentonite is more conducive to the combination of the liquid microcapsule flavor and the granular bentonite particles and the smooth entry into the interior of the granular bentonite. 3. Selection of fine powdered bentonite particles for the second bentonite coating The purpose of using the fine powdered bentonite in the technical solution of the present application is to carry out the second bentonite wrapping: although granular bentonite is used to adsorb the liquid microcapsule fragrance to achieve the first bentonite wrapping, it can be seen from the observation through microscope imaging during the experiment that not all liquid microcapsule fragrances ideally enter the particle gaps of the granular bentonite, and some liquid microcapsule fragrances are adsorbed on the particle surface of the granular bentonite. In this way, if the liquid microcapsule fragrance is directly put into the washing powder, it is easy to break under the action of external force. Therefore, a fine powdered bentonite with a moisture content of 2-6% and an average particle size of 44μm is selected for the second bentonite wrapping to form a dense shell structure of the bentonite protective layer; at the same time, the fine powdered bentonite is selected to minimize the gaps as much as possible to form a better bentonite protective layer; The starting point for choosing fine powdered bentonite with a moisture content of 2-6% and an average particle size of 44μm instead of using bentonite with a smaller particle size is mainly because bentonite with a smaller particle size has poor fluidity and is not easy to disperse. If the particle size is too large, it is not easy to adhere to the outer layer of the granular bentonite particles adsorbed with liquid microcapsule essence obtained after the first wrapping of bentonite; 4. The amount and timing of water addition Before using fine powdered bentonite for the second bentonite wrapping, water is first added to the bentonite particles that have been wrapped for the first time and adsorbed with liquid microcapsule essence. The reason is that adding water at this time can increase the surface humidity of the granular bentonite particles, so that the fine powdered bentonite can be better bonded. At the same time, the liquid microcapsule essence adsorbed in the granular bentonite particles can also be moisturized to prevent the liquid microcapsule essence from being broken due to a dry environment. However, adding too much water can easily cause the granular bentonite particles to stick together, and also make the granular bentonite particles have too much water content, so that the final bentonite microcapsule fragrance particles have a negative impact on the sodium percarbonate in the washing powder. Therefore, it is finally determined through experiments that the amount of water added does not exceed 2% of the total raw material amount (calculated by mass percentage) for preparing the bentonite microcapsule fragrance particles; 5. Use of sodium chloride Since sodium-based bentonite has stronger water absorption and expansion properties than calcium-based / magnesium-based, it rapidly releases heat and heats up when it meets water, and large lumps will be formed locally. If the lumps are broken by other equipment, the pores of the granular bentonite particles will be destroyed, affecting the penetration of the liquid microcapsule flavor. In addition, the granular bentonite and the liquid microcapsule flavor will quickly agglomerate when they meet; adding a certain proportion of granular sodium chloride with a particle size of 0.2mm-1.0mm into the granular bentonite can effectively prevent the granular bentonite and the liquid microcapsule flavor from forming large lumps when they are mixed and contacted, and even if a small amount of large lumps are formed when they are just mixed, after a few minutes of standing and then stirring again, the small amount of large lumps formed can easily disperse into the original granular bentonite particle shape, and the particle strength is increased, and it is not easy to be destroyed during subsequent use, thereby better protecting the stable state of the liquid microcapsule flavor in the granular bentonite particles; The reason why granular sodium chloride is chosen is that there is no void on the surface of granular sodium chloride crystals, so it is not easy to absorb liquid microcapsule flavors. Sodium chloride with a particle size of 0.2-1.0mm is much larger than microcapsule flavors with a particle size of 5-15μm, which ensures that liquid microcapsule flavors enter the micropores of granular bentonite first, and granular sodium chloride does not block the pores of granular bentonite (pore diameter is about 50μm-100μm). In addition, the temperature of sodium chloride decreases when it meets water, and it does not stick. It is dispersed between granular bentonite to play an isolation role, thereby preventing the rapid expansion and bonding between granular bentonite and preventing the formation of large lumps. The reason why granular sodium chloride is chosen is that sodium chloride is a hard crystal, which can improve the strength of granular bentonite particles after bonding with granular bentonite particles. At the same time, the particle size of sodium chloride of 0.2mm-1.0mm is the particle size range of ordinary refined salt. The raw materials are cheap and easy to obtain, and it can also be used as a filler for washing powder, which can be said to kill two birds with one stone; By adding granular sodium chloride with a particle size of 0.2mm-1.0mm without adsorption effect, the mixing process of granular bentonite and liquid microcapsule flavor can be carried out smoothly in an ordinary vertical double-screw mixer without the need for cooling equipment, thereby reducing the energy consumption used for cooling; and solving the technical problem that traditional sodium-based bentonite particles heat up when exposed to water, expand and aggregate into agglomerates.

[0049] Example 1 A bentonite microcapsule fragrance particle, calculated based on the one-time preparation of 2000g of bentonite microcapsule fragrance particles, the raw materials used in the preparation are calculated by mass (mass percentage), and the composition and content are as follows: The granular bentonite is sodium-based bentonite with a particle size of 0.2 mm to 2.0 mm, a moisture content of 2 to 6%, and particles with a particle size of 0.5 mm to 1.5 mm account for ≥ 80% by weight; The above-mentioned granular bentonite was observed by a polarizing microscope at 50 times magnification, and the obtained microscope image is as follows: Figure 1 As shown, from Figure 1 It can be seen that the granular bentonite has an uneven surface; The polarizing microscope image of the above-mentioned granular bentonite at 100 times magnification is as follows: Figure 2 As shown, from Figure 2 It can be seen that there is an obvious pore structure in the granular bentonite, and the diameter of the pores is between 50μm and 100μm; The above-mentioned fine powdered bentonite is sodium-based bentonite with an average particle size of 44 μm and a water content of 2-6%; The particle size of the liquid microcapsule flavor is 5 μm to 15 μm; The particle size of the granular sodium chloride is 0.2 mm to 1.0 mm; The preparation process of the bentonite microcapsule fragrance particles specifically includes the following steps: (1) The first encapsulation of liquid microcapsule flavor in bentonite (absorbed into the pores of granular bentonite): In a vertical double-screw mixer, granular bentonite and granular sodium chloride are stirred and mixed at a speed of 4 r / min for 1 min, and then liquid microcapsule flavor is added and stirred at a speed of 4 r / min for 5 min (stirring time is too long will cause excessive heat release and adhesion), and then allowed to stand for 3 min to obtain bentonite particles adsorbed with liquid microcapsule flavor; In order to observe the adsorption of liquid microcapsule essence by granular bentonite on bentonite particles adsorbed with liquid microcapsule essence, the liquid microcapsule essence is dyed, and the obtained colored liquid microcapsule essence is then repeated with the above-mentioned first bentonite wrapping process of the liquid microcapsule essence, and finally the bentonite particles adsorbed with colored liquid microcapsule essence are obtained; The dyeing process of the above-mentioned liquid microcapsule fragrance is as follows: The liquid microcapsule flavor and fuel acid red 52 are mixed evenly at a mass ratio of 0.05% acid red 52 aqueous solution to liquid microcapsule flavor of 1:10 to obtain a colored liquid microcapsule flavor solution; The bentonite particles adsorbed with colored liquid microcapsule essence were observed through a polarizing microscope at a magnification of 50. The obtained microscope image is as follows: Figure 3 As shown, from Figure 3 It can be seen that the dark spots are the colored microcapsule flavors, and the dark microcapsule flavors can be seen on the edge of the bentonite particles, indicating that after the liquid microcapsule flavors are wrapped by the bentonite for the first time, some of the microcapsule flavors cannot completely enter the pores of the granular bentonite. (2) Second Bentonite Packing of Liquid Microcapsule Essence: The speed is controlled to be 5 r / min and the stirring state is continued. Water is added to the bentonite particles adsorbed with liquid microcapsule fragrance obtained in step (1) by spraying. After the water is added, the speed is continued to be controlled to be 5 r / min. Fine powdered bentonite is added under stirring. After the fine powdered bentonite is added, the speed is continued to be controlled to be 5 r / min and the stirring is continued for 2 minutes to obtain bentonite microcapsule fragrance particles. The aperture of each spray hole of the spraying equipment used for the above spraying is 0.5mm-1.0mm, and the water pressure is 2.5Mpa; In order to observe the liquid microcapsule flavor after being coated with fine powdered bentonite for the second time, the bentonite particles adsorbing the colored liquid microcapsule flavor obtained in step (1) were subjected to the above-mentioned second coating process of the liquid microcapsule flavor with bentonite. The finally obtained liquid microcapsule flavor coated with bentonite for the second time with colored liquid microcapsule flavor was observed under a polarizing microscope at a magnification of 50. The obtained microscope image is as follows: Figure 4 As shown, from Figure 4It can be seen that after the second bentonite encapsulation with fine powdered bentonite, the edges of the obtained bentonite microcapsule fragrance particles became smooth, and the dark-colored microcapsule fragrance on the outside was rare, which showed that the liquid microcapsule fragrance was successfully encapsulated in the bentonite.

[0050] The bentonite microcapsule fragrance particles obtained above can achieve a good encapsulation of liquid microcapsule fragrance. However, in large-scale production, bentonite microcapsule fragrance particles used for the production of multiple batches of long-lasting fragrance washing powder in one day can be prepared at one time. For example: 2000g of bentonite microcapsule fragrance particles are prepared at one time to meet the production of 4 batches (500g per batch) of long-lasting fragrance washing powder, or 500g of bentonite microcapsule fragrance particles can be directly used for one batch of long-lasting fragrance washing powder. However, if a batch is prepared with a dosage of 500g, although the preparation process is the same as the one-time preparation of 2000g, if large-scale production equipment is used, the amount of material used for the initial preparation of bentonite microcapsule fragrance particles is small, and the material level is too low to be conducive to stirring and mixing, and the formed bentonite microcapsule fragrance particles may have an impact on the coating effect of the liquid microcapsule fragrance.

[0051] Application Example 1 A long-lasting fragrance washing powder containing bentonite microcapsule fragrance particles, based on the preparation amount of 10000g, the various raw material compositions and the amounts of various raw materials used in its preparation are calculated by mass (mass percentage) as follows: The bentonite microcapsule fragrance particles are the bentonite microcapsule fragrance particles prepared in Example 1.

[0052] The preparation method of the above-mentioned long-lasting fragrance washing powder containing bentonite microcapsule fragrance particles, the specific steps of the preparation process are as follows: (1) Preparation of bentonite microcapsule fragrance particles, as in Example 1; (2) Add spray-dried base powder, alkaline detergent, anhydrous sodium sulfate, and bentonite microcapsule fragrance particles to a vertical double-screw mixer, and then control the stirring speed to 5 r / min for stirring for 1 min, then add non-ionic surfactant and ordinary liquid essence in sequence under the stirring state of 5 r / min, and continue to control the stirring speed to 5 r / min for stirring for 1 min after adding, and then add sodium percarbonate under the stirring state of 5 r / min, and continue to control the stirring speed to 5 r / min for stirring for 4 min after adding, to obtain a long-lasting fragrance washing powder; The long-lasting fragrance washing powder obtained above contains liquid microcapsule fragrance, alkaline builder (high alkali), sodium percarbonate and non-ionic surfactant.

[0053] Comparative Example of Application Example 1 (Liquid microcapsule fragrance is directly added to washing powder) A long-lasting fragrance washing powder is compared with Application Example 1, except that among the raw materials used in the preparation of Application Example 1, the granular bentonite, fine powdered bentonite and water used to prepare the bentonite microcapsule fragrance particles are replaced with anhydrous sodium sulfate in equal amounts, the contents of liquid microcapsule fragrance and granular sodium chloride remain unchanged, and the other raw materials and the composition and content of each raw material are the same as those in Application Example 1, as shown in the following table:

[0054] The preparation method of the above-mentioned long-lasting fragrance washing powder comprises the following specific steps: Add 4000g of spray-dried base powder, 2000g of alkaline builder, 2345g of anhydrous sodium sulfate and 110g of granular sodium chloride to a vertical double-screw mixer, then control the stirring speed to 5r / min and stir for 1min, then add 800g of non-ionic surfactant AEO9 and 20g of ordinary liquid flavor in sequence under the stirring state of 5r / min; During the stirring process of adding the non-ionic surfactant AEO9 and the ordinary liquid flavor, 25g of liquid microcapsule flavor is sprayed at the same time, and the spraying time of the liquid microcapsule flavor is controlled to be completed within 3-5 minutes; After adding the non-ionic surfactant AEO9, ordinary liquid flavor and liquid microcapsule flavor, continue to control the stirring speed to 5r / min and stir for 1 minute, then add 700g of sodium percarbonate while stirring at a stirring speed of 5r / min. After adding the sodium percarbonate, continue to control the stirring speed to 5r / min and stir for 4 minutes to obtain a long-lasting fragrance washing powder.

[0055] The long-lasting fragrance washing powder obtained in the above-mentioned Application Example 1 and the comparative example of Application Example 1 were respectively sieved through a 2.5 mm sieve. It can be seen that after the long-lasting fragrance washing powder obtained in Application Example 1 was sieved through the 2.5 mm sieve, there was basically no residue on the sieve; while after the long-lasting fragrance washing powder obtained in the comparative example of Application Example 1 was sieved through a 2.5 mm sieve, there were obvious microcapsule fragrance lumps with a particle size of 3-5 mm on the sieve, which showed that the liquid microcapsule fragrance in the comparative example of Application Example 1 could not be well dispersed due to the addition method (spraying by an ordinary spray device), that is, the liquid microcapsule fragrance could not be completely absorbed by the spray-dried base powder and other components of the washing powder, thereby causing a waste of liquid microcapsule fragrance raw materials. The liquid microcapsule fragrance in Application Example 1 of the present application is added in the form of bentonite microcapsule fragrance particles, which can be better mixed with the spray-dried base powder and other components.

[0056] The long-lasting fragrance effect of the long-lasting fragrance washing powder obtained in the above-mentioned Application Example 1 and the comparative example of Application Example 1 was evaluated (in order to ensure that the amount of liquid microcapsule fragrance used in Application Example 1 and the comparative example of Application Example 1 was the same, the liquid microcapsule fragrance clumps sieved out in the comparative example of Application Example 1 were crushed and re-mixed into the long-lasting fragrance washing powder obtained in the comparative example of Application Example 1), and the specific evaluation was as follows: The long-lasting fragrance washing powder of Application Example 1 and the comparative example of Application Example 1 were stored for 24 hours, 1 week, 4 weeks and 8 weeks respectively, and then used to wash fabrics (4 unused white cotton towels), dried and stored for 24 hours. The fragrance evaluation results are shown in Table 1: Table 1. Evaluation results of fragrance retention of fabrics after washing and drying for 24 hours at different storage times

[0057] As can be seen from the above table, the long-lasting fragrance washing powder prepared by using the liquid microcapsule fragrance in the form of bentonite microcapsule fragrance particles in Application Example 1 of the present application, and the long-lasting fragrance washing powder prepared by directly adding the liquid microcapsule fragrance in the comparative example of Application Example 1, after storage for 24 hours, the fabrics were washed, dried and stored for 24 hours respectively, and the fragrance retention results of the two were the same, both of which were 5 points, and there was no difference in fragrance retention, and the fragrance retention intensity of the two was also the same, both of which were 10 points. However, as the storage time of the long-lasting fragrance washing powder was extended, the fragrance retention and fragrance retention intensity of the long-lasting fragrance washing powder prepared by using the liquid microcapsule fragrance in the form of bentonite microcapsule fragrance particles in Application Example 1 of the present application were significantly better than those of the comparative example of Application Example 1.

[0058] The long-lasting fragrance washing powder of Application Example 1 and the comparative example of Application Example 1 were stored for 24 hours, 1 week, 4 weeks and 8 weeks respectively, and then used to wash fabric towels (4 unused white cotton towels), dried and stored for 72 hours. The fragrance evaluation results are shown in Table 2: Table 2. Evaluation results of fragrance retention of fabrics after washing and drying for 72 hours at different storage times

[0059] As can be seen from Table 2 above, the long-lasting fragrance laundry detergent prepared in the form of bentonite microcapsule fragrance particles using the liquid microcapsule fragrance in Application Example 1 of the present application, and the long-lasting fragrance laundry detergent prepared by directly adding liquid microcapsule fragrance in the comparative example of Application Example 1, after storage for 24 hours, the fabrics were washed and dried for 72 hours respectively, and the fragrance retention results of the two were the same, both of which were 5 points, and there was no difference in fragrance retention. The fragrance retention intensity of the two was also the same, both were 8 points, that is, the fragrance retention intensity began to weaken.

[0060] Combining the above Tables 1 and 2 for analysis, it can be seen that the long-lasting fragrance washing powder prepared in the form of bentonite microcapsule fragrance particles using the liquid microcapsule fragrance of Example 1 and the long-lasting fragrance washing powder prepared by directly adding liquid microcapsule fragrance in the comparative example of Example 1 have the same storage time, and the storage time of the fabric after washing and drying is extended from 24h to 72h. The fragrance retention time and fragrance intensity of the fabric after washing prepared by the long-lasting fragrance washing powder in the form of bentonite microcapsule fragrance particles using the liquid microcapsule fragrance of Example 1 of the present application are significantly better than those of the comparative example 1 of Example 1.

[0061] The long-lasting fragrance washing powder of Application Example 1 and the comparative example of Application Example 1 were stored for 4 weeks respectively, and then towels (4 unused white cotton towels) were washed and dried and stored for 7 days (1 week). The fragrance evaluation results are shown in Table 3: Table 3. Evaluation results of fragrance retention of fabrics after washing and drying for 7 days after 4 weeks of storage.

[0062] As can be seen from Table 3 above, the long-lasting fragrance washing powder prepared in the form of bentonite microcapsule fragrance particles using the liquid microcapsule fragrance of Example 1 of the present application is compared with the long-lasting fragrance washing powder obtained by directly adding microcapsule fragrance in the comparative example of Example 1. After storage for 4 weeks, the fabrics are washed and dried respectively and then stored for 7 days (1 week). The long-lasting fragrance washing powder prepared in the form of bentonite microcapsule fragrance particles using the liquid microcapsule fragrance of Example 1 still has good fragrance retention and good fragrance retention intensity.

[0063] After the long-lasting fragrance washing powder obtained by using Example 1 and the comparative example of Example 1 was stored for 8 weeks, towels (4 unused white cotton towels) were washed, dried and stored for 14 days (2 weeks). The fragrance evaluation results are shown in Table 4 below: Table 4. Evaluation results of fragrance retention of fabrics after washing and drying for 14 days after storage for 8 weeks

[0064] As can be seen from Table 4 above, the long-lasting fragrance washing powder prepared by using the liquid microcapsule fragrance of Example 1 of the present application in the form of bentonite microcapsule fragrance particles and the long-lasting fragrance washing powder prepared by directly adding microcapsule fragrance in the comparative example of Example 1 of the present application were stored for 8 weeks, and the fabric (towel) was washed, dried and stored for 14 days (2 weeks). The long-lasting fragrance washing powder prepared by using the liquid microcapsule fragrance of Example 1 in the form of bentonite microcapsule fragrance particles still has good fragrance retention and fragrance retention intensity.

[0065] The above results show that the liquid microcapsule fragrance of the present application is used to prepare a long-lasting fragrance washing powder in the form of bentonite microcapsule fragrance particles, which can improve the stability of the liquid microcapsule fragrance in high-alkalinity, sodium percarbonate-containing, and high-nonionic surfactant washing powder. The obtained long-lasting fragrance washing powder is stored in a constant temperature and humidity environment of 37°C and 85% relative humidity for 8 weeks (equivalent to storage at room temperature for more than 2 years). The washed fabric still has a good fragrance effect after being placed for 14 days.

[0066] Example 2 A bentonite microcapsule fragrance particle, calculated based on the preparation of 200 kg of bentonite microcapsule fragrance particles, the various raw material compositions and the amounts of various raw materials used in its preparation are calculated by mass (mass percentage) as follows:

[0067] The preparation method of the bentonite microcapsule fragrance particles is specifically the same as the preparation method of the bentonite microcapsule fragrance particles in Example 1 to obtain bentonite microcapsule fragrance particles.

[0068] Application Example 2 A long-lasting fragrance washing powder containing bentonite microcapsule fragrance particles obtained in Example 2, taking large-scale production as an example, taking the preparation amount of 1000 kg as the basis, the various raw material compositions and the amounts of various raw materials used in its preparation are calculated by mass (mass percentage) as follows:

[0069] The preparation method of the above-mentioned long-lasting fragrance washing powder has the same preparation process as the preparation method of the long-lasting fragrance washing powder of Application Example 1 to obtain the long-lasting fragrance washing powder.

[0070] After storing the long-lasting fragrance laundry detergent containing the bentonite microcapsule fragrance particles obtained in Example 2 for 4 weeks, the fabric (towel) was washed and dried and stored for 24 hours, 72 hours, 7 days and 14 days respectively, and the fragrance evaluation test was carried out. The results showed a fragrance retention trend similar to that in Application Example 1, which shows that the long-lasting fragrance laundry detergent containing bentonite microcapsule fragrance particles of the present application can be produced on a large scale, and the microcapsule fragrance will not be destroyed due to large external forces in large-scale production.

[0071] Embodiment 3-5 A bentonite microcapsule fragrance particle, based on the preparation of 2000g, the various raw material compositions and the amounts of various raw materials used in its preparation are calculated by mass (mass percentage), as shown in the following table:

[0072] The preparation methods of the bentonite microcapsule fragrance particles of the above-mentioned Examples 3-5 are specifically the same as the preparation method of the bentonite microcapsule fragrance particles of Example 1, and the bentonite microcapsule fragrance particles are obtained respectively.

[0073] Application Examples 3-5 A long-lasting fragrance washing powder, based on the preparation amount of 10000g, the raw materials used in its preparation are calculated by mass (content in mass percentage), and its composition and content are as follows: The bentonite microcapsule fragrance particles are the bentonite microcapsule fragrance particles prepared in Examples 3, 4 and 5 respectively.

[0074] The preparation method of the above-mentioned long-lasting fragrance washing powder has the same preparation process as the preparation method of the long-lasting fragrance washing powder of Application Example 1, and the corresponding long-lasting fragrance washing powders of bentonite microcapsule fragrance particles of Examples 3, 4, and 5 are obtained respectively.

[0075] The above-obtained long-lasting fragrance washing powder containing the corresponding bentonite microcapsule fragrance particles of Examples 3, 4, and 5 was stored for 4 weeks, and the fabrics (towels) were washed and dried, and then stored for 24 hours, 72 hours, 7 days, and 14 days, respectively, and then fragrance evaluation tests were performed. The results showed that the long-lasting fragrance washing powder prepared by using Examples 4 and 5, that is, the bentonite microcapsule fragrance particles obtained in Examples 4-5, had a better fragrance retention effect. Combined with Application Example 1 and Application Example 2, it can be concluded that the long-lasting fragrance washing powder prepared by using bentonite microcapsule fragrance particles with a liquid microcapsule fragrance content of 5-10% has a better fragrance retention effect.

[0076] Application Examples 6-8 A long-lasting fragrance washing powder, based on the preparation of 10000g, the composition and amount of various raw materials used in its preparation (content calculated by mass percentage) are as follows: The bentonite microcapsule fragrance particles used in the above-mentioned application examples 6, 7, and 8 are all the bentonite microcapsule fragrance particles prepared in Example 1.

[0077] The preparation method of the long-lasting fragrance washing powder of the above-mentioned application examples 6-8 has the same preparation process as the preparation method of the long-lasting fragrance washing powder of the application example 1, and the long-lasting fragrance washing powder is obtained respectively.

[0078] After storing the long-lasting fragrance washing powder obtained in the above-mentioned application examples 6-8 for 4 weeks, the fabrics (towels) were washed and dried and then stored for 24 hours, 72 hours, 7 days and 14 days respectively, and then fragrance evaluation tests were performed. The results showed that the long-lasting fragrance washing powder obtained in application example 8 had a better fragrance retention effect.

[0079] Application Examples 9-11 A long-lasting fragrance washing powder, based on the preparation of 10000g, the various raw materials used in its preparation are calculated by mass (mass percentage), the raw material composition (all the same as in Application Example 1), the amount of each raw material or the content calculated by mass percentage (the contents of spray-dried base powder, nonionic surfactant, sodium percarbonate, alkaline builder and ordinary liquid essence are the same as in Application Example 1, except that the amount of bentonite microcapsule fragrance particles and the amount of anhydrous sodium sulfate in the balance are adjusted) are specifically as follows: The above-mentioned bentonite microcapsule fragrance particles all adopt the bentonite microcapsule fragrance particles prepared in Example 1.

[0080] The preparation method of the above-mentioned long-lasting fragrance washing powder of application examples 9-11 has the same preparation process as the preparation method of the long-lasting fragrance washing powder of application example 1.

[0081] The long-lasting fragrance washing powders obtained in the above-mentioned application examples 9-11 were stored for 4 weeks, and then used to wash and dry fabrics (towels), respectively. After being stored for 7 days, fragrance evaluation tests were conducted, and it was found that the fragrance retention effect of application example 11 was better. Combined with the fragrance retention effect of application example 1, a comprehensive evaluation was conducted. The results showed that when the mass percentage of bentonite microcapsule fragrance particles was 5-10%, the obtained long-lasting fragrance washing powder had a better fragrance retention effect.

[0082] The specific embodiments of the present application are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A bentonite microcapsule fragrance particle, characterized in that The raw materials used in its preparation are calculated by mass percentage, and their composition and content are as follows: The above-mentioned bentonite microcapsule fragrance particles are prepared by first mixing granular bentonite, granular sodium chloride and liquid microcapsule fragrance, and then spraying the obtained bentonite particles adsorbed with liquid microcapsule fragrance with water and then mixing them evenly with fine powdered bentonite; The particle size of the granular bentonite>the particle size of the granular sodium chloride>the particle size of the fine powdered bentonite>the particle size of the liquid microcapsule flavor; The granular bentonite or the fine powdered bentonite are the same, and are sodium-based, calcium-based or magnesium-based bentonite.

2. The bentonite microcapsule fragrance particle according to claim 1, characterized in that:

3. The bentonite microcapsule fragrance particle according to claim 2, characterized in that: The particle size of the granular bentonite is 0.2mm-2.0mm, and the weight of particles with a particle size of 0.5mm-1.6mm accounts for 80-100%, and the water content is 2-6%; The average particle size of fine powdered bentonite is 44 μm and the moisture content is 2-6%. The particle size of granular sodium chloride is 0.2-1.0 mm; The particle size of liquid microcapsule flavor is 5 to 15 μm.

4. The method for preparing bentonite microcapsule fragrance particles according to any one of claims 1 to 3, characterized in that The steps include: (1) The first encapsulation of liquid microcapsule essence by granular bentonite: The granular bentonite, granular sodium chloride and liquid microcapsule essence are mixed evenly to obtain the bentonite granules adsorbed with the liquid microcapsule essence; (2) Second encapsulation of liquid microcapsule essence by fine powdered bentonite: Under stirring, water is added to the bentonite particles adsorbed with liquid microcapsule fragrance obtained in step (1) by spraying, and then fine powdered bentonite is added under continued stirring to obtain bentonite microcapsule fragrance particles.

5. The method for preparing bentonite microcapsule fragrance particles according to claim 4, characterized in that In the process of mixing the granular bentonite, granular sodium chloride and liquid microcapsule flavor in step (1), the granular bentonite and granular sodium chloride are firstly stirred and pre-mixed at a speed of 4-5 r / min for 0.5-1 min, and then the liquid microcapsule flavor is added and stirred for 2-5 min. The liquid microcapsule flavor, granular bentonite and granular sodium chloride are mixed and then allowed to stand for 3-5 min.

6. The method for preparing bentonite microcapsule fragrance particles according to claim 5, characterized in that In step (2): adding water in the spraying manner, that is, spraying water onto the obtained bentonite particles adsorbed with liquid microcapsule fragrance under the condition of controlling the stirring speed to 4-5r / min, the aperture of each spray hole of the spraying equipment used for spraying is 0.5-1.0mm, and the water pressure is 2.0-2.5Mpa; after adding fine powdered bentonite, the speed is controlled to 4-5r / min and stirred for 2-3min to obtain bentonite microcapsule fragrance particles with a particle size of 0.25mm-2.5mm.

7. A long-lasting fragrance washing powder containing the bentonite microcapsule fragrance particles as claimed in any one of claims 1 to 3, characterized in that The raw materials used in the preparation of the long-lasting fragrance washing powder contain 2-10% of bentonite microcapsule fragrance particles calculated by mass percentage.

8. The long-lasting fragrance washing powder as claimed in claim 7, characterized in that The raw materials used in the preparation of the long-lasting fragrance washing powder, calculated by mass percentage, also contain 15-50% of spray-dried base powder, 2-10% of nonionic surfactant, 4-15% of sodium percarbonate, 20% of alkaline builder, 0.2% of ordinary liquid essence and the balance of anhydrous sodium sulfate; The spray-dried base powder is the base powder used in washing powder produced by high tower spraying; The nonionic surfactant is AEO7, AEO8, AEO9 or AEO10; The alkaline builder is sodium carbonate, sodium silicate or sodium aluminosilicate.

9. The long-lasting fragrance washing powder as claimed in claim 8, characterized in that The raw materials used in the preparation of the long-lasting fragrance washing powder contain 5-10% of bentonite microcapsule fragrance particles calculated by mass percentage.

10. The method for preparing a long-lasting fragrance washing powder according to claim 8, characterized in that The steps include: (1) Preparation of bentonite microcapsule fragrance particles Firstly, granular bentonite, granular sodium chloride and liquid microcapsule essence are mixed, and then the obtained bentonite granules adsorbed with liquid microcapsule essence are sprayed with water and then mixed evenly with fine powdered bentonite to obtain bentonite microcapsule fragrance granules; Add spray-dried base powder, alkaline builder, anhydrous sodium sulfate, bentonite microcapsule fragrance particles in the container in turn, then control the stirring speed to 4-5r / min and stir for 1-2 minutes, add non-ionic surfactant and ordinary liquid fragrance while keeping stirring to mix evenly, then add sodium percarbonate and continue stirring to obtain long-lasting fragrance washing powder.

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