Portable high-stability anti-breaking skin care beads and preparation method thereof

Abstract

This invention belongs to the field of daily chemical products technology, and in particular to a portable, highly stable, shatter-resistant moisturizing bead and its preparation method. The portable, highly stable, shatter-resistant moisturizing bead uses agar as a rigid framework, high-acyl gellan gum as a flexible network, and poly-γ-glutamic acid sodium salt as a long-lasting water-locking factor to form a ternary interpenetrating network. By weight percentage, it comprises 1%-5% molding agent, 1%-15% humectant, 8%-15% moisturizer, 0.1%-2% emulsifying thickener, 0.01%-0.2% chelating agent, 0.5%-1% preservative, 0.1%-1% fragrance, and the balance being deionized water; it is prepared using a one-step drip-curing process. This invention solves the technical contradictions of existing skin moisturizing beads, such as poor resistance to drop and breakage, easy water separation, and difficulty in simultaneously addressing the issue of easy crushing. The product has a breakage rate of <5% after a 1-meter free fall, a water separation rate of ≤0.1% after 30 days of sealing at 25℃, and a skin moisture enhancement rate of >30% after 8 hours. It is easy to crush, produces no residue, is stable over a wide temperature range, has a simple preparation process, is suitable for industrial production, and has excellent market application value.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, specifically to a portable, highly stable, shock-resistant moisturizing bead and its preparation method. Background Technology

[0002] Moisturizing gel beads, as a novel cosmetic formulation, are favored by consumers for their portable appearance, refreshing feel, and moisturizing effects. However, existing moisturizing gel bead products generally suffer from technical defects such as poor structural stability, easy water separation, short water retention time, complex manufacturing processes, and weak impact resistance. Insufficient structural stability: The single gel network is fragile under external force, exhibiting poor resistance to breakage and freeze-thaw cycles; prone to water separation: moisture easily separates from the gel network during long-term storage, and agar gels exhibit separation, leading to deterioration in appearance and user experience; limited water retention: small molecule moisturizers such as glycerin and propylene glycol lack long-lasting water-locking ability and cannot form a durable moisturizing barrier on the skin surface; complex core-shell structure manufacturing process: calcium alginate system core-shell beads require two-step curing, demanding advanced equipment, making it difficult to control shell thickness, and resulting in poor batch stability; insufficient impact resistance: easily damaged during canning, transportation, and use, failing to meet the needs of portable use.

[0003] Existing gel bead technologies mostly employ a sodium alginate-calcium ion crosslinking system, which can form spherical gels, but cannot simultaneously achieve both mechanical strength and water separation stability. Related patented technologies still have significant limitations. Chinese patent application CN117503636A discloses a cosmetic gel bead that uses sodium alginate and edible gums (carrageenan, xanthan gum, guar gum, agar, etc.) to form a core-shell composite capsule. The calcium ion receiving phase is dripped into the capsule through a two-phase dripping device for cross-linking. The core is used to encapsulate oil-soluble active ingredients to improve stability. However, this technology is a core-shell structure and requires a two-step cross-linking process, which has problems such as insufficient mechanical strength, easy water separation, and poor resistance to breakage. Chinese patent CN110917071B discloses a core-shell structured flexible bead, whose hydrogel shell is composed of agar, gellan gum, sodium alginate, thickener, and ultraviolet absorber, and the core layer is a hydrophobic photosensitive material and oil. It adopts coaxial dropper oil cold molding + calcium ion secondary cross-linking. The core is used to protect the photosensitive active ingredients. However, this technology is still a core-shell structure and two-step curing. The gel network is fragile and prone to water separation during long-term storage, and it cannot achieve the unity of being easy to crush and resistant to drop. Chinese patent CN111991243B discloses a double-layer multi-effect gel beads, which use gellan gum, agarose or carrageenan as thickeners and are prepared by crushing and mixing after gel formation. It has multiple functions such as makeup removal and moisturizing. However, this technology is not spherical droplet forming and has no interpenetrating network structure, so its water retention capacity is limited and its impact resistance is poor. It also cannot solve the problems of crushing and falling off and water separation during storage.

[0004] In summary, existing technologies cannot achieve the unity of being easily crushable, not shedding residue, and not releasing water. Developing a skin bead product that is structurally stable, resistant to breakage and water release, provides long-lasting moisturizing effects, and is easy to manufacture has become a technical challenge that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: a portable, highly stable, anti-shatter, moisturizing bead, the composition of which, by weight percentage, is as follows: Molding agent: 1%-5%; moisturizer: 1%-15%; skin moisturizer: 8%-15%; emulsifying and thickening agent: 0.1%-2%; chelating agent: 0.01%-0.2%; preservative: 0.5%-1%; fragrance: 0.1%-1%; balance is deionized water.

[0007] As a preferred embodiment of the portable, highly stable, anti-drop and anti-breakage moisturizing beads of the present invention, the molding agent is composed of agar, high-acyl gellan gum, and sodium poly-γ-glutamate in a weight ratio of 15:1:1-10:2:1.

[0008] As a preferred embodiment of the portable, highly stable, anti-drop and shatter-resistant moisturizing beads described in this invention, the agar is composed of agarobiose, which is composed of two monosaccharides linked alternately: BD-galactose and 3,6-dehydrated-aL-galactose. The two monosaccharides are linked by β-1,4-glycosidic bonds to form agarobiose, and the disaccharides are further linked by α-1,3-glycosidic bonds to form the long-chain backbone of agar. The high-acyl gellan gum is composed of hundreds to thousands of repeating tetrasaccharides, which are composed of four monosaccharides: β-D-GlcA+BD-Glc+β-D-GlcA+aL-Rh.

[0009] As a preferred embodiment of the portable, highly stable, anti-drop and anti-breakage moisturizing beads of the present invention, the moisturizer is one or more of glycerin, 1,3-propanediol, glyceryl polyether-26, betaine, and polyquaternium-51.

[0010] As a preferred embodiment of the portable, highly stable, anti-drop and anti-breakage moisturizing beads of the present invention, the moisturizing agent is one or more of the following: triglyceride (ethylhexanoate), caprylic / capric triglyceride, shea butter, polydimethylsiloxane, and stearic acid.

[0011] As a preferred embodiment of the portable, highly stable, anti-drop and anti-breakage moisturizing beads described in this invention, the emulsifying thickener is Sepik EG or Sepik 305.

[0012] In a preferred embodiment of the portable, highly stable, anti-drop and anti-breakage moisturizing beads described in this invention, the chelating agent is sodium phytate.

[0013] A method for preparing portable, highly stable, shock-resistant, and moisturizing beads includes the following steps: S1: Add the molding agent, moisturizer, chelating agent and deionized water to the emulsification pot, stir and heat at 30r / min to 80-82℃, and keep warm for 20min; S2: Add the emollient and emulsifying thickener to the mixing bowl and stir at 30 rpm for 10-15 minutes; S3: Pump the material from S2 into S1, keep it at 80-82℃ for 5 minutes to homogenize it, and obtain a uniform mixture. S4: Cool the mixture to 70-72℃, add preservatives and fragrances, stir for 10 minutes, drip in the 0-5℃ pre-cooled receiving liquid through a dripping device, let it stand and solidify for 10-20 minutes to form spherical gel beads; S5: Rinse the surface of the beads with purified water, drain, and you will get the finished moisturizing beads. Compared with existing technologies, the beneficial effects of this invention are: excellent drop and breakage resistance: the breakage rate of a 1-meter free fall is <5%, far superior to the breakage rate of existing products >20%; extremely strong resistance to water separation: the water separation rate is ≤0.1% after 30 days of sealing at 25℃, and <1% after 3 months of accelerated water separation at 40℃; long-lasting moisturizing effect: the skin moisture increase rate is >30% after 8 hours of use; easy to crush without shedding: under pressure of 1.0-2.0N, it can be easily crushed by the thumb and forefinger without shedding any debris; simple process: one-step drip curing, no need for two-step cross-linking, low equipment requirements, and high batch stability; wide temperature stability: no water separation or cracking during cycling at -10℃-50℃, and a shelf life of ≥24 months. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1The image shows the product appearance before the 1-meter free fall test of this invention. The left side is a photo of the product appearance of Example 1, the middle side is a photo of the product appearance of Comparative Example 2, and the right side is a photo of the product appearance of Comparative Example 4. Figure 2 The images show the appearance of the product after the 1-meter free fall test of this invention. The left side shows the appearance of the product of Example 1, the middle side shows the appearance of the product of Comparative Example 2, and the right side shows the appearance of the product of Comparative Example 4. Detailed Implementation

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below.

[0016] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below.

[0018] This invention provides a ternary interpenetrating network moisturizing bead with agar as a rigid skeleton, high acyl gellan gum as a flexible network, and sodium poly-γ-glutamate as a long-lasting water-locking factor, achieving a synergistic unity of anti-shatter, low water separation, easy crushing, and long-lasting moisturizing, and the preparation process is simple and suitable for industrial production.

[0019] The core mechanism of this invention is as follows: agar forms a rigid three-dimensional skeleton, providing basic structural support and mechanical strength; high-acyl gel forms a flexible network, imparting elasticity and anti-shatter properties, and filling the pores of the agar skeleton to inhibit water seepage; sodium poly-γ-glutamate, as a long-lasting water-locking factor, has super water absorption and retention, forming a film on the skin surface to lock in water; the three form a ternary interpenetrating network (IPN), achieving synergistic effects of rigidity, flexibility, and water-locking, and resolving the technical contradiction between anti-shatter and anti-water seepage.

[0020] Specifically, a portable, highly stable, shatter-resistant moisturizing bead, by weight percentage, comprises the following components: Molding agent: 1%-5%, composed of agar, high acyl gellan gum, and sodium poly-γ-glutamate in a weight ratio of 15:1:1-10:2:1; Moisturizer: 1%-15%, selected from one or more of glycerin, 1,3-propanediol, glyceryl polyether-26, and betaine; Emollients: 8%-15%, selected from one or more of the following: triglycerides (ethylhexanoate), caprylic / capric triglycerides, shea butter, polydimethylsiloxane, and stearic acid; Emulsifying thickener: 0.1%-2%, selected from Sepik EG or Sepik 305; Chelating agent: 0.01%-0.2%, sodium phytate; Preservatives: 0.5%-1%; Fragrance: 0.1%-1%; Deionized water: Balance.

[0021] A method for preparing portable, highly stable, shock-resistant, and moisturizing beads includes the following steps: S1: Add the molding agent, moisturizer, chelating agent and deionized water to the emulsification pot, stir and heat at 30r / min to 80-82℃, and keep warm for 20min; S2: Add the emollient and emulsifying thickener to the mixing bowl and stir at 30 rpm for 10-15 minutes; S3: Pump the material from S2 into S1, keep it at 80-82℃ for 5 minutes to homogenize it, and obtain a uniform mixture. S4: Cool the mixture to 70-72℃, add preservatives and fragrances, stir for 10 minutes, drip in the 0-5℃ pre-cooled receiving liquid through a dripping device, let it stand and solidify for 10-20 minutes to form spherical gel beads; S5: Rinse the surface of the beads with pure water, drain, and you will get the finished skin moisturizing beads. Example

[0022] Standardized testing methods: Pressure: An Adeberg pressure gauge was used, unit N, 25℃, Φ15mm cylindrical probe, pressing speed 1mm / s, 6 parallel tests were performed and the average was taken; Breakage rate: 20 beads were dropped from a height of 1 meter onto a hard acrylic surface, repeated 3 times. Breakage rate = (number of broken beads / total number of beads) × 100%. Water separation rate: Weighing method, water separation rate = mass of separated water / initial bead mass × 100%; Moisturizing improvement rate: Corneometer skin moisture tester, inner forearm of human body n=10, test the moisture improvement rate after 8 hours; Temperature stability: Freeze at -10℃ for 24 hours → bake at 50℃ for 24 hours, repeat 3 times, and observe the appearance; Particle size: Using vernier calipers, the diameter of 30 beads was randomly measured and the average value was taken.

[0023] Example formulation (by weight percentage):

[0024] Comparative formulation (by weight percentage):

[0025] Performance test data:

[0026] Verification of the ternary synergistic effect:

[0027] Industrial batch stability:

[0028] Stability test: Stability tests were conducted on the products prepared in Examples 1-3 and Comparative Examples 1-3. The method involves filling the product (contents) into 30ml PE bottles, labeling them with the product name, formula number, test conditions, and test date, and testing the product's heat and cold resistance stability at -15℃, 0℃, 50℃, -15-50℃, and in a biochemical incubator. Changes in the product's appearance and odor are observed at 1, 2, 4, and 8 weeks (after returning to room temperature), and the changes at each time point are recorded. The test results are shown in the table below (change severity rating: "0" = no significant change, "1" = slight change, "2" = significant change, "3" = severe change):

[0029] 1-meter free fall experiment: The products prepared in Example 1, Comparative Example 2, and Comparative Example 4 (60 pieces each) were subjected to a 1-meter free-fall test. After the test, 1 piece (1.7%) of the product from Example 1 broke, 5 pieces (8.3%) of the product from Comparative Example 2 broke, and 15 pieces (25%) of the product from Comparative Example 4 broke. The appearance of the products before the test is as follows. Figure 1 As shown, the product appearance after the experiment is as follows. Figure 2 As shown.

[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A portable, highly stable, shock-resistant, moisturizing bead, characterized in that, The composition of these portable, highly stable, shatter-resistant moisturizing beads, by weight percentage, is as follows: Molding agent: 1%-5%; Moisturizer: 1%-15%; Skin moisturizer: 8%-15%; Emulsifying and thickening agent: 0.1%-2%; Chelating agent: 0.01%-0.2%; Preservatives: 0.5%-1%; Fragrance: 0.1%-1%; balance is deionized water.

2. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 1, characterized in that, The molding agent is composed of agar, high-acyl gellan gum, and sodium poly-γ-glutamate in a weight ratio of 15:1:1-10:2:1; the moisturizing beads are integrally molded gel beads without a core-shell structure.

3. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 2, characterized in that, The agar is composed of agarobiose, which is formed by two monosaccharides: BD-galactose and 3,6-dehydro-aL-galactose. The two monosaccharides are linked by β-1,4-glycosidic bonds to form agarobiose, and the disaccharides are further linked by α-1,3-glycosidic bonds to form the long chain backbone of agar. The high-acyl gellan gum is composed of hundreds to thousands of repeating tetrasaccharides, which are composed of four monosaccharides: β-D-GlcA+BD-Glc+β-D-GlcA+aL-Rh.

4. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 1, characterized in that, The humectant is one or more of glycerin, 1,3-propanediol, glyceryl polyether-26, betaine, and polyquaternium-51.

5. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 1, characterized in that, The emollient is one or more of the following: triglyceride (ethylhexanoate), caprylic / capric triglyceride, shea butter, polydimethylsiloxane, and stearic acid.

6. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 1, characterized in that, The emulsifying thickener is Sepik EG or Sepik 305.

7. The portable, highly stable, shock-resistant, and moisturizing bead according to claim 1, characterized in that, The chelating agent is sodium phytate.

8. The portable, highly stable, shock-resistant, and moisturizing beads according to claim 1, characterized in that, The skin-moisturizing beads have a breakage rate of less than 5% when dropped from 1 meter, a water separation rate of ≤0.1% after being sealed at 25℃ for 30 days, and no residue when crushed.

9. The portable, highly stable, shock-resistant, and moisturizing beads according to claim 6, characterized in that, The moisturizing beads are stable during cycling at -10℃ to 50℃ and have a particle size of 9-10mm.

10. A method for preparing the portable, highly stable, anti-drop, and shatter-resistant moisturizing beads according to any one of claims 1-9, characterized in that, Includes the following steps: (1) Add the molding agent, moisturizer, chelating agent and deionized water to the emulsification pot, stir and heat at 30 r / min to 80-82℃, and keep warm for 20 min; (2) Add the emollient and emulsifying thickener to the mixing bowl and stir at 30 r / min for 10-15 min; (3) The material from step (2) is drawn into step (1), kept at 80-82℃ for 5 minutes to homogenize, and a uniform mixture is obtained; (4) Cool the mixture to 70-72℃, add preservatives and fragrances, stir for 10 min, add 0-5℃ pre-cooled receiving liquid, solidify for 10-20 min, and form spherical gel beads; (5) Rinse the surface of the beads with pure water and drain to obtain the finished product; The preparation method is a one-step drop-curing process that does not require secondary cross-linking.

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