A composition containing rod-like crystalline particles, and a method for preparing and using the same

Abstract

The present application provides a kind of composition containing rod-shaped crystalline particles and its preparation method and application, and the composition containing rod-shaped crystalline particles includes the following mass percentage components: anionic surfactant 15%-20%, nonionic surfactant 5%-15%, solid ester crystallization agent 15%-25%, and the balance is water;Wherein, the critical packing parameter CPP value of anionic surfactant is 0.3-0.5, and the aspect ratio of rod-shaped crystalline particle is greater than or equal to 3;When preparing, first form rod-shaped surfactant micelles, and when cooling, solid ester crystallization agent is crystallized with rod-shaped micelles as a template;The preparation method of the present application is simple, and the preparation cost is low;The composition containing rod-shaped crystalline particles of the present application can be applied to personal care cleaning type cosmetics as silicone oil suspending agent, and rod-shaped crystalline particles can prevent silicone oil and other substances in personal care cleaning type cosmetics from delaminating, and improve the stability of product.

Description

A composition containing rod-shaped crystalline particles, its preparation method and application Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to a composition containing rod-shaped crystalline particles, its preparation method, and its application. Background Technology

[0002] Cationic polymers and oils are commonly added to personal care products such as shampoos and shower gels to improve their performance. For opaque products containing silicone oils or other oils, the significant density difference between oils and water can lead to layering, affecting both the product's appearance and performance. To address this issue, suspending agents are added. Commonly used suspending agents include acrylate polymers, cellulose polymers, and guar gum polymers.

[0003] Chinese patent CN107001536B discloses a multiphase polymer suspending agent. This polymeric suspending agent swells in water and, through steric hindrance, achieves a certain yield value, thus preventing components of different densities from floating or sinking. This type of suspending agent effectively solves the suspension problem in products such as shower gels. However, when used in shampoos, this suspending agent reacts with cationic polymers in the shampoo, forming polymeric complex salt colloids that precipitate out. These complex salt colloids reduce the conditioning effect of the cationic polymers in the shampoo, and the residual complex salt polymers on the hair contribute to a sticky and heavy feeling.

[0004] Patent CN1078631A discloses a shampoo premix, and the shampoo composition prepared from it and its preparation method, including a method for preparing a premixed composition for a crystalline suspension agent. The premix is ​​characterized by comprising: (a) at least 5% alkyl ethoxylated sulfate anionic surfactant; (b) 3%–15% fatty acid polyethylene glycol glycerol ester nonionic surfactant; (c) 3%–30% amphoteric surfactant; (d) 2%–15% suspending agent; and (e) 30%–60% water. Although this patent includes a suspending agent, the examples and beneficial effects mentioned in the patent only mention foaming and pearlescent effects, without clarifying the suspending effect of the suspending agent. Furthermore, according to the implementation of CN1078631A, the formed pearlescent suspended particles are spherical under a microscope, with limited suspending force, and the product will separate into layers after 7 days at 48°C.

[0005] Therefore, there is an urgent need to develop a composition containing rod-shaped crystalline particles that has a good suspending effect on oils and fats. Summary of the Invention

[0006] Therefore, the purpose of this invention is to overcome the shortcomings of the existing products and provide a composition containing rod-shaped crystalline particles that has a good suspending effect on oils and fats, as well as its preparation method and application.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a composition containing rod-shaped crystalline particles, the composition comprising the following components in mass percentage: 15%-20% anionic surfactant, 5%-15% nonionic surfactant, 15%-25% solid ester crystallizer, and the balance being water; wherein the critical packing parameter (CPP) of the anionic surfactant is 0.3-0.5, and the aspect ratio of the rod-shaped crystalline particles is ≥3.

[0009] Preferably, the anionic surfactant is one or more of the following: sulfate ester salts, alkyl polyoxyethylene ether sulfate ester salts, sulfonates, ester acyl amino acid salts, carboxylates, fatty alcohol polyether carboxylates, phosphate ester salts, and sulfosuccinate salts.

[0010] Specifically, the anionic surfactant is selected from: ammonium dodecyl sulfate, ammonium lauryl polyoxyethylene ether sulfate, triethylamine lauryl sulfate, triethylamine lauryl polyoxyethylene ether sulfate, triethanolamine lauryl sulfate, triethanolamine lauryl polyoxyethylene ether sulfate, monoethanolamine lauryl sulfate, monoethanolamine lauryl polyoxyethylene ether sulfate, diethanolamine lauryl sulfate, diethanolamine lauryl polyoxyethylene ether sulfate, sodium lauryl monoester sulfate, sodium lauryl sulfate, sodium lauryl polyoxyethylene ether sulfate, potassium lauryl sulfate, potassium lauryl polyoxyethylene ether sulfate, ammonium cocoyl sulfate, ammonium dodecyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauryl sulfate, triethanolamine lauryl sulfate, triethanolamine lauryl sulfate, monoethanolamine cocoyl sulfate, monoethanolamine lauryl sulfate, and mixtures thereof. In addition to the sulfate, hydroxyethyl sulfonate, sulfonate, and sulfosuccinate groups mentioned above, other possible anions of anionic surfactants include phosphonate, phosphate, and carboxylate groups.

[0011] Furthermore, the nonionic surfactant, acting as a structure inducer, exhibits excellent affinity for solid ester crystallizers during dissolution, aiding in their dissolution. Simultaneously, it regulates the critical packing parameter (CPP) of the micelles. Specifically, the nonionic surfactant is selected from: cocamide, cocamide methyl MEA, cocamide DEA, cocamide MEA, cocamide MIPA, lauramide DEA, lauramide MEA, lauramide MIPA, tetradecylamide DEA, tetradecylamide MEA, PEG-20 cocamide MEA, PEG-2 cocamide, PEG-3 cocamide, PEG-4 cocamide, PEG-5 cocamide, PEG-6 cocamide, PEG-7 cocamide, PEG-3 lauramide, PEG-5 lauramide, PEG-3 oleamide, PPG-2 cocamide, PPG-2 hydroxyethyl cocamide, and mixtures thereof.

[0012] Preferably, the solid ester crystallizing agent is one or more of solid fatty acids, solid fatty alcohols, and solid esters.

[0013] More preferably, the solid ester crystallizing agent is one or more of ethylene glycol stearate, ethylene glycol distearate, trihydroxystearin, and hydrogenated castor oil.

[0014] The mass percentage of the anionic surfactant in the composition containing rod-shaped crystalline particles described in this invention is 15-20%, for example, it can be 15%, 16%, 17%, 18%, 19%, or 20%, etc.

[0015] The nonionic surfactant in the composition containing rod-shaped crystalline particles described in this invention has a mass percentage of 5%-15%, for example, it can be 5%, 6%, 8%, 10%, 12%, 14% or 15%, etc.

[0016] The mass percentage of the solid ester crystallizer in the composition containing rod-shaped crystalline particles described in this invention is 15-25%, for example, it can be 15%, 18%, 20%, 22%, 24%, or 25%, etc.

[0017] The composition containing rod-shaped crystalline particles of the present invention, through the rational selection and combination of anionic surfactants, nonionic surfactants, solid ester crystallizing agents, and water, can obtain rod-shaped crystalline particles with an aspect ratio ≥3. These rod-shaped crystalline particles can effectively suspend silicone oil in personal care and cleansing cosmetics, prevent silicone oil from separating from other substances in personal care and cleansing cosmetics, and improve product stability.

[0018] On the other hand, the present invention provides a method for preparing a composition containing rod-shaped crystalline particles as described in the first aspect, the method comprising the following steps:

[0019] S1: According to the formula, put the anionic surfactant, nonionic surfactant and water together and stir at a temperature of 65℃-85℃ until they are evenly mixed.

[0020] S2: Add the solid ester crystallizer to the mixture obtained in step S1, and stir for 15 min to 60 min at a temperature of 70℃-80℃ and a speed of 100 rpm-800 rpm.

[0021] S3: The mixed solution obtained in step S2 is cooled to below 35°C under the conditions of stirring rate of 100rpm-800rpm and cooling rate of 0.5°C / min-2°C / min to obtain a composition containing rod-shaped crystalline particles.

[0022] The method for preparing the composition containing rod-shaped crystalline particles of the present invention first involves forming rod-shaped surfactant micelles by dissolving anionic surfactant, nonionic surfactant, and water at 65°C-85°C. When a solid ester crystallizer is added, it is dissolved and solubilized into the rod-shaped surfactant micelles at 70°C-80°C. During the subsequent cooling process, the solid ester crystallizer crystallizes along the rod-shaped surfactant micelle template to form rod-shaped crystalline particles with an aspect ratio ≥3.

[0023] It should be noted that during the crystallization process of solid ester crystallizers, the interaction between nonionic and anionic surfactants should not be too strong, otherwise it will hinder the mass exchange of the solid ester crystallizer along the direction of the rod-shaped surfactant micelles, which is not conducive to the formation of rod-shaped crystal particles with an aspect ratio ≥3.

[0024] Preferably, the temperature in step S1 is 75℃~80℃.

[0025] Thirdly, the present invention provides the application of a composition containing rod-shaped crystalline particles as described in the first aspect as a silicone oil suspending agent in personal care and cleansing cosmetics.

[0026] Fourthly, the present invention provides a personal care and cleansing cosmetic, the personal care and cleansing cosmetic comprising the composition containing rod-shaped crystalline particles as described in the first aspect, wherein the amount of the composition containing rod-shaped crystalline particles added accounts for 5-8% of the mass percentage of the personal care and cleansing cosmetic.

[0027] The composition containing rod-shaped crystalline particles of the present invention can be used as a silicone oil suspending agent in personal care and cleansing cosmetics. The rod-shaped crystalline particles with an aspect ratio ≥3 can effectively suspend the silicone oil in personal care and cleansing cosmetics, prevent the silicone oil from separating from other substances in personal care and cleansing cosmetics, and improve the stability of the product.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The composition containing rod-shaped crystalline particles of the present invention and its preparation method can obtain rod-shaped crystalline particles with an aspect ratio ≥3 by rationally selecting and combining anionic surfactants, nonionic surfactants, solid ester crystallizing agents and water, and by rationally preparing them. The preparation method of the present invention is simple and has low preparation cost.

[0030] (2) The composition containing rod-shaped crystalline particles of the present invention can be used as a silicone oil suspending agent in personal care and cleansing cosmetics. The rod-shaped crystalline particles with an aspect ratio ≥3 can suspend the silicone oil in personal care and cleansing cosmetics well, prevent the silicone oil in personal care and cleansing cosmetics from separating with other substances, and improve the stability of the product. Attached Figure Description

[0031] Figure 1 is a microstructure diagram of the composition in Example 1;

[0032] Figure 2 is a microstructure diagram of the composition in Example 2;

[0033] Figure 3 is a microstructure diagram of the composition in Example 3;

[0034] Figure 4 shows the microstructure of the premix in Comparative Example 1;

[0035] Figure 5 shows the stability curve of the shampoo in Application Example 1 at 25°C.

[0036] Figure 6 shows the stability curve of the shampoo in Application Example 2 at 25°C;

[0037] Figure 7 shows the stability curve of the shampoo in Application Example 3 at 25°C;

[0038] Figure 8 shows the stability curve of the shampoo in Application Example 4 at 25°C.

[0039] Figure 9 shows the stability curve of the shampoo in Application Example 5 at 25°C;

[0040] Figure 10 shows the stability curve of the shampoo in Application Example 6 at 25°C.

[0041] Figure 11 shows the stability curve of the shampoo in Comparative Application Example 1 at 25°C.

[0042] Figure 12 shows the stability curve of the shampoo in Comparative Application Example 2 at 25°C.

[0043] Figure 13 shows the stability curve of the shampoo in Comparative Application Example 3 at 25°C;

[0044] Figure 14 shows the stability curve of the shampoo in Application Example 1 at 48°C;

[0045] Figure 15 shows the stability curve of the shampoo in Application Example 2 at 48°C;

[0046] Figure 16 shows the stability curve of the shampoo in Application Example 3 at 48°C;

[0047] Figure 17 shows the stability curve of the shampoo in Application Example 4 at 48°C;

[0048] Figure 18 shows the stability curve of the shampoo in Application Example 5 at 48°C;

[0049] Figure 19 shows the stability curve of the shampoo in Application Example 6 at 48°C;

[0050] Figure 20 shows the stability curve of the shampoo in Comparative Application Example 1 at 48°C;

[0051] Figure 21 shows the stability curve of the shampoo in Comparative Application Example 2 at 48°C;

[0052] Figure 22 shows the stability curve of the shampoo in Comparative Application Example 3 at 48°C. Detailed Implementation

[0053] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] As used herein, the terms “prepared from” and “comprising” are synonymous. The terms “comprising,” “including,” “having,” “containing,” or any other variations thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0055] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1 to 5” is disclosed, the described range should be interpreted as including the ranges “1 to 4”, “1 to 3”, “1 to 2”, “1 to 2 and 4 to 5”, “1 to 3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0056] Furthermore, the indefinite articles “a” and “an” preceding the elements or components of this invention do not impose any limitation on the quantity requirement (i.e., the number of times) of the elements or components. Therefore, “an” or “a” should be interpreted as including one or at least one, and the singular form of an element or component also includes the plural form, unless the quantity clearly refers to the singular form.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] Example 1

[0059] A composition containing rod-shaped crystalline particles comprises the following components in weight percentage: 15% sodium lauryl ether sulfate (anionic surfactant), 10% cocoamide MEA (nonionic surfactant), 12% ethylene glycol distearate (solid ester crystallizer), and 63% water.

[0060] The method for preparing the above-mentioned composition containing rod-shaped crystalline particles includes the following steps:

[0061] S1: Heat the anionic surfactant, nonionic surfactant and water to 75°C and stir until they are evenly mixed;

[0062] S2: Add the solid ester crystallizer to the mixture obtained in step S1, and stir for 40 minutes at a temperature of 75°C and a speed of 200 rpm to make it evenly mixed.

[0063] S3: The mixed solution obtained in step S2 is cooled to 35°C under the conditions of stirring at 100 rpm and cooling at 1°C / min to obtain a composition containing rod-shaped crystalline particles.

[0064] Example 2

[0065] A composition containing rod-shaped crystalline particles comprises the following components in weight percentage: 15% sodium lauryl ether sulfate (anionic surfactant), 8% cocamidomethyl MEA (nonionic surfactant), 20% ethylene glycol distearate (solid ester crystallizer), and 57% water.

[0066] The preparation method of the composition containing rod-shaped crystalline particles in this embodiment is the same as that in Example 1.

[0067] Example 3

[0068] A composition containing rod-shaped crystalline particles comprises the following components in weight percentage: 18% sodium lauryl ether sulfate (anionic surfactant), 6% cocoamide MEA (nonionic surfactant), 18% ethylene glycol distearate (solid ester crystallizer), and 58% water.

[0069] The preparation method of the composition containing rod-shaped crystalline particles in this embodiment is the same as that in Example 1.

[0070] Comparative Example 1

[0071] Comparative Example 1 was designed with reference to Example VII in patent document CN1078631A. The formula of its shampoo is as follows: 14% sodium lauryl ethoxylate, 4.5% disodium cocoamphodiacetate, 2% CAPB, 0.09% Polyquaternium 10, 1% ethylene glycol distearate, 0.5% Dinethicone, 0.6% fragrance, 0.2% DMDM ​​hydantoin, 0.45% citric acid, 0.57% triceryl methyl ammonium chloride, and 76.09% water.

[0072] Add 4.7% sodium lauryl ethoxy-3 sulfate and 4.5% disodium coconut oil amphoteric diacetate to an emulsifying pot and heat to 71°C with stirring. Add 1% ethylene glycol distearate and stir to dissolve. Dissolve 0.45% citric acid in 0.45% water and then add it to the main premix. Cool to 32°C to allow ethylene glycol distearate to crystallize and form a crystalline network premix.

[0073] The premix prepared in Comparative Example 1 is comparable to the compositions containing rod-shaped crystalline particles prepared in Examples 1-3 of this invention.

[0074] Application Examples 1-6

[0075] The compositions containing rod-shaped crystalline particles prepared in Examples 1-3 of this invention were respectively applied to shampoos. The specific formulations of the shampoos in the application examples are shown in Table 1:

[0076] Table 1 Shampoo formulations in Application Examples 1-6

[0077]

[0078] The preparation method of the shampoo in Application Examples 1-3 is as follows:

[0079] Citric acid, sodium citrate, PQ10, and cocoyl betaine were added to water and stirred until evenly dispersed while heating. When the temperature reached 75°C, sodium lauryl ether sulfate was added, and the mixture was stirred and kept warm for 30 minutes. After even dispersion, the temperature was lowered to 40°C, and then fragrance, sodium benzoate, phenoxyethanol, emulsified silicone oil, and the composition of Example 1 were added and stirred until evenly dispersed. After cooling to 25°C, salt was added to adjust the viscosity to 10000±1000 mPa·s to obtain the shampoo.

[0080] Comparative Application Examples 1-3

[0081] Comparative Application Example 1

[0082] The shampoo of Comparative Application Example 1 was designed with reference to Example VII in patent document CN1078631A. The shampoo formula is as follows: 14% sodium lauryl ethoxylate, 4.5% disodium cocoamphodiacetate, 2% CAPB, 0.09% Polyquaternium 10, 1% ethylene glycol distearate, 0.5% Dinethicone, 0.6% fragrance, 0.2% DMDM ​​hydantoin, 0.45% citric acid, 0.57% triceryl methyl ammonium chloride, and 76.09% water.

[0083] Preparation method:

[0084] (1) Add 4.7% sodium lauryl ethoxy-3 sulfate and 4.5% disodium coconut oil amphoteric diacetate to an emulsifying pot, stir and heat to 71°C; add 1% ethylene glycol distearate, stir and dissolve; dissolve 0.45% citric acid in 0.45% water, then add it to the main premix, cool to 32°C, so that ethylene glycol distearate crystallizes to form a crystalline network premix.

[0085] (2) In another emulsifying pot, add Polyquaternium 10 and the remaining water and stir to disperse evenly. Then add 2% CAPB, stir and heat to 71°C, and add 9.3% lauryl ethoxy-3 sulfate and 0.57% triceryl methyl ammonium chloride and stir to disperse evenly. After cooling to 30°C, add the above premix, 0.5% Dinethicone, 0.6% fragrance and 0.2% DMDM ​​hydantoin to obtain shampoo.

[0086] Comparative Application Example 2

[0087] Comparative Application Example 2 is the same as Application Example 1 except that the composition of Example 1 in Comparative Example 1 is replaced with the composition of Example 1 in Comparative Example 1.

[0088] Comparative Application Example 3

[0089] Comparative Application Example 3 is the same as Application Example 4 except that Comparative Example 1 is used instead of the composition of Example 1.

[0090] Performance testing:

[0091] 1. Microscopic morphology observation of the composition and premix

[0092] The compositions containing rod-shaped crystalline particles obtained in Examples 1-3 and the premix obtained in Comparative Example 1 were diluted with deionized water to a 1% solution, and their microstructure was observed under a microscope. The test results are shown in Figures 1-4.

[0093] As can be seen from Figures 1-4, the crystalline particles in the compositions obtained in Examples 1-3 of the present invention are rod-shaped with a diameter of about 2 μm and a length of 6-15 μm, and their aspect ratio is ≥3. In contrast, the crystalline particles in the premix obtained in Comparative Example 1 are spherical with a diameter of 0.5-2.5 μm. When the above compositions or premixes are used in shampoos, the crystalline particles all act as suspending agents in the shampoos.

[0094] 2. Shampoo stability test

[0095] Using a LUM stability analyzer, the shampoos prepared for use cases 1-6 and comparative application cases were tested at 25°C and 48°C to predict and evaluate the 3-year stability of the products and obtain their instability index. The test graphs are shown in Figure 5-22 and the instability index is shown in Table 2.

[0096] Table 2 shows the instability index of shampoos in Application Examples 1-6 and Comparative Application Examples.

[0097]

[0098] Note: The higher the instability index, the worse the stability; samples with a stability index below 0.02 can meet the 3-year stability requirement.

[0099] As shown in Table 2, the instability index of the shampoos in Application Examples 1-6 of this invention is less than 0.02 under both 25℃ and 48℃ conditions, indicating that they can meet the 3-year shelf-life stability requirement under both conditions. Furthermore, Table 2 shows that under 48℃ conditions, compared to the shampoos in Comparative Application Examples 1-3, the shampoos in Application Examples 1-6 of this invention have a lower instability index, while the instability index of the shampoos in Comparative Application Examples 1-3 is greater than 0.02, indicating that they cannot meet the 3-year shelf-life stability requirement. This demonstrates that when the composition containing rod-shaped crystalline particles obtained in Examples 1-3 of this invention is used as a silicone oil suspending agent in personal care and cleansing cosmetics, the rod-shaped crystalline particles with an aspect ratio ≥3 can effectively suspend the silicone oil in the personal care and cleansing cosmetics, preventing the silicone oil from separating from other substances and improving product stability.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A composition containing rod-shaped crystalline particles, characterized in that, The composition containing rod-shaped crystalline particles comprises the following components by mass percentage: 15%-20% anionic surfactant, 5%-15% nonionic surfactant, 15%-25% solid ester crystallizer, and the balance being water; wherein the critical packing parameter (CPP) of the anionic surfactant is 0.3-0.5, and the aspect ratio of the rod-shaped crystalline particles is ≥3; the preparation method of the composition containing rod-shaped crystalline particles includes the following steps: S1: The anionic surfactant, nonionic surfactant, and water are placed together according to the ratio, and then heated at a warm temperature. S1: Stir at 65℃-85℃ until homogeneous; S2: Add solid ester crystallizing agent to the mixture obtained in step S1, and stir at 70℃-80℃ and 100rpm-800rpm for 15min-60min; S3: Cool the mixture obtained in step S2 to below 35℃ at a stirring rate of 100rpm-800rpm and a cooling rate of 0.5℃ / min-2℃ / min to obtain a composition containing rod-shaped crystalline particles; the temperature in step S1 is 75℃~80℃.

2. The composition containing rod-shaped crystalline particles according to claim 1, characterized in that, The anionic surfactant is one or more of the following: sulfate ester salts, alkyl polyoxyethylene ether sulfate ester salts, sulfonates, ester acyl amino acid salts, carboxylates, fatty alcohol polyether carboxylates, phosphate ester salts, and sulfosuccinate salts.

3. The composition containing rod-shaped crystalline particles according to claim 1, characterized in that, The solid ester crystallizing agent is one or more of solid fatty acids, solid fatty alcohols, and solid esters.

4. The composition containing rod-shaped crystalline particles according to claim 3, characterized in that, The solid ester crystallizing agent is one or more of ethylene glycol stearate, ethylene glycol distearate, trihydroxystearin, and hydrogenated castor oil.

5. The use of a composition containing rod-shaped crystalline particles as described in any one of claims 1-4 as a silicone oil suspending agent in personal care and cleansing cosmetics.

6. A personal care and cleansing cosmetic product, characterized in that, The personal care and cleansing cosmetic product includes the composition containing rod-shaped crystalline particles as described in any one of claims 1-4, wherein the amount of the composition containing rod-shaped crystalline particles added accounts for 5-8% of the mass percentage of the personal care and cleansing cosmetic product.

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