Novel anti-freezing and anti-cracking hand cream and preparation process thereof

Abstract

The present application relates to a kind of novel anti-freezing anti-cracking hand cream, according to percentage by weight, including, water phase:55~65%, oil phase:28~38%, emulsification-stable system:3~6%, active repair phase:2~4%, buffer-preservation-fragrance:0.3~0.8%;Wherein, water phase includes, bamboo leaf oligosaccharide:5~10%, 1,3-propanediol:8~12%, erythritol:3~6%, purified water: remainder to water phase 100%;Oil phase includes, camellia seed oil:8~12%, mango seed fat:6~10%, coconut oil MCT:4~8%, phytosterol ester:2~4%, rice bran wax microparticle:2~4%;Emulsification-stable system includes, sucrose stearate:2~3.5%, hydrogenated lecithin:1.5~2.5%, sphingomonad fermenting polysaccharide:0.3~0.7%.The present application also relates to a kind of novel anti-freezing anti-cracking hand cream preparation process.The present application gives quantifiable systematic breakthrough to the current hand cream "thick heavy stuff, high temperature inactivation, low temperature failure, poor wash resistance, slow repair, non-environmental protection " six structural pain points: absorption is fast, extrusion force is small, wash resistance is prolonged, and fissured healing is fast.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, and in particular to a novel anti-freezing and anti-cracking hand cream and its preparation process. Background Technology

[0002] Chilblains are common in early winter and early spring, and are more prevalent in children, women, and those with poor peripheral blood circulation. These patients often present with cold extremities, cyanosis of the extremities, and excessive sweating. Lesions commonly occur on the fingers, back of the hands, toes, edges of the feet, and heels, often bilaterally. The most common lesions are localized, ecchymosporotic, dark purplish-red, raised, edematous erythema with indistinct borders, bright red edges, a tense and shiny surface, and a soft texture. Local pressure causes blanching, and the red color gradually returns after pressure is released. In severe cases, blisters may develop, rupturing to form erosions or ulcers. After healing, pigmentation or atrophic scars may remain. Itching is significant and worsens with heat; pain occurs after ulceration.

[0003] Anti-freezing and anti-cracking hand creams are commonly used, but current anti-freezing and anti-cracking hand creams, with their high-melting-point petroleum jelly and mineral oil, form a suffocating film on the skin's surface, resulting in a "moisturized exterior but stuffy interior." Existing hand cream products have an absorption time of 7-9 minutes, leave fingerprint residue on 68 mm² of mobile phone fingerprints, and cause 18% of palm acne. In winter outdoor conditions at -15°C, the squeezing force is 35-45 N, making it difficult for the elderly or women to squeeze out with one hand.

[0004] Therefore, it is desirable to provide a novel anti-freezing and anti-cracking hand cream and its preparation process in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] The first objective of this invention is to provide a novel anti-freezing and anti-crack hand cream that offers a quantifiable and systematic breakthrough for the six major structural pain points of current hand creams: "thick and suffocating, inactivation at high temperatures, failure at low temperatures, poor washability, slow repair, and non-environmentally friendly." It features fast absorption, low extrusion force, extended water resistance, and rapid healing of chapped skin.

[0006] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0007] Aqueous phase: 55~65%, oil phase: 28~38%, emulsification-stabilization system: 3~6%, active repair phase: 2~4%, buffer-preservative-fragrance: 0.3~0.8%;

[0008] in,

[0009] The aqueous phase comprises: bamboo leaf oligosaccharides: 5-10%, 1,3-propanediol: 8-12%, erythritol: 3-6%, and purified water: balance to 100% of the aqueous phase.

[0010] The oil phase includes: camellia seed oil: 8-12%, mango seed oil: 6-10%, coconut oil MCT: 4-8%, phytosterol esters: 2-4%, and rice bran wax microparticles: 2-4%.

[0011] The emulsification-stabilization system includes sucrose stearate: 2-3.5%, hydrogenated lecithin: 1.5-2.5%, and Sphingomonas fermentation polysaccharide: 0.3-0.7%.

[0012] Specifically, in the particle size distribution of rice bran wax microparticles, the D90 value is between 10 and 20 µm.

[0013] Specifically, the active repair phase includes ceramide NP: 0.3~0.8%, panthenol: 0.8~1.5%, ascorbyl palmitate: 0.3~0.6%, and perilla seed polyphenols: 0.5~1.2%.

[0014] Specifically, the buffer-preservative-fragrance composition includes L-arginine: 0.1~0.2%, sodium gluconate: 0.3~0.5%, and natural juniper essential oil: 0.03~0.08%.

[0015] The second objective of this invention is to provide a novel process for preparing an anti-freezing and anti-cracking hand cream, comprising the following steps:

[0016] S1. Aqueous phase dissolution: Add purified water to the aqueous phase pot and stir it at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide and 1,3-propanediol in sequence.

[0017] S2, Oil phase dispersion: Camellia seed oil, mango seed oil and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32~38℃; after melting, phytosterol esters and rice bran wax particles are added. The oil phase pot is rotated at 600 rpm and dispersed for 5 minutes.

[0018] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0019] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0020] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0021] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0022] S7. Vacuum degassing: Pour the material in the emulsifying pot into the vacuum degassing tank and turn off the light;

[0023] S8, ambient temperature filling.

[0024] Specifically, in step S1, purified water is added to the aqueous phase pot and stirred at 200 rpm. Then, erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol are added sequentially, with a 1-minute interval between each bag to prevent clumping.

[0025] Specifically, in step S1, the conductivity at 25°C is 180~220µScm⁻¹, and it is considered qualified if it is visually clear. If the conductivity is >250µScm⁻¹, the feeding is stopped, the pipeline is rinsed with pure water, and the test is repeated.

[0026] Specifically, in step S2, the wax particles are considered qualified if they are uniformly suspended and there is no visible agglomeration; if particles >50µm appear, high shear is initiated at 3000rpm for 2min and the particle size is measured again.

[0027] Specifically, in step S7, residual oxygen ≤ 0.8 ppm; viscosity 28000±2000 cP is acceptable; foam > 2 cm, extend for 5 min or add 0.02% silicone oil to defoam.

[0028] Specifically, in step S8, the specific operation of room temperature filling is as follows: the material temperature is 20~25℃, and the material is filled through a 40-mesh bag filter and a filling pump. The filling amount is nominally 30g with an error of ±1%.

[0029] This invention discloses a novel anti-freezing and anti-cracking hand cream and its preparation process, which has the following beneficial effects.

[0030] (1) This “zero petroleum-based cold-mix micro-jet” solution addresses the six major structural pain points of current hand creams: “thick and stuffy, high-temperature inactivation, low-temperature failure, poor washability, slow repair, and non-environmentally friendly”, and provides a quantifiable systemic breakthrough: absorption is 4 times faster, extrusion force is 3 times smaller, water washability is extended by 4.5 times, crack healing is 54% faster, carbon footprint is reduced by 38%, and the entire process is ≤42℃ for energy-saving production, providing the industry with a new generation of antifreeze and anti-crack technology path;

[0031] (2) Rapidly repairs chapped skin. The triple barrier of ceramide + panthenol + sterol esters reduces the clinical healing time to 3.2 days, a 54% decrease compared to the traditional 7 days. Enhanced antioxidant capacity: Perilla seed polyphenols + oil-soluble VC derivatives increase MDA inhibition rate to 52%, higher than the old scheme. Bamboo leaf oligosaccharides resist crystallization; no needle-like crystals are observed after 72 hours at -20℃, and viscosity changes are ≤ +10%, solving the problem of "hardening at low temperatures." Rice bran wax microparticles form a "breathable" film with a gas exchange coefficient of 1.1 mg cm⁻²h⁻¹, three times that of petrolatum film, sealing without causing acne. The liquid crystal emulsion system is stable; sucrose esters + hydrogenated lecithin show no stratification after centrifugation at 3000 rpm × 30 min. The oil layer is 0 mm thick after 72 hours at 45℃. The pH is skin-friendly and buffered; L-arginine adjusts the pH to 5.5~6.0, with no amine odor and no risk of nitrosamines. Sensitive skin patches show 0 / 30 positive results. Room temperature filling is compatible with multiple packaging materials at 18~25℃. At ℃, it can be directly filled into vacuum pumps, hoses, and capsules without high-temperature deformation or leakage due to thermal expansion and contraction. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below.

[0033] Example 1

[0034] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0035] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0036] in,

[0037] The aqueous phase consists of: bamboo leaf oligosaccharides: 8%, 1,3-propanediol: 10%, erythritol: 5%, and purified water: 19%.

[0038] The oil phase includes: camellia seed oil: 10%, mango seed oil: 8%, coconut oil MCT: 6%, phytosterol esters: 3%, and rice bran wax microparticles: 3%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0039] The emulsification-stabilization system includes sucrose stearate: 2.5%, hydrogenated lecithin: 2%, and Sphingomonas fermentation polysaccharide: 0.5%.

[0040] The active repair phase includes ceramide NP: 0.5%, panthenol: 1%, ascorbyl palmitate: 0.5%, and perilla seed polyphenols: 1%.

[0041] The buffer-preservative-fragrance formula includes L-arginine: 0.15%, sodium gluconate: 0.4%, and natural juniper essential oil: 0.05%.

[0042] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0043] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0044] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0045] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0046] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0047] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0048] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0049] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0050] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0051] The detection data for Example 1 are as follows:

[0052] Appearance: Pale green, smooth and creamy;

[0053] pH: 5.7;

[0054] Viscosity: 27500 cP;

[0055] D50: 0.25 µm;

[0056] Extrusion force at -20℃: 11N;

[0057] 40-minute water wash TEWL increase: 9%;

[0058] 8-hour moisture content: +35%;

[0059] Crack healing: 3.3 days;

[0060] Residual oxygen: 0.6 ppm;

[0061] Centrifugation: No stratification;

[0062] Compared to the baseline: extrusion force decreased by 39%, TEWL increase decreased by 31%, and healing time decreased by 47%.

[0063] Example 2

[0064] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0065] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0066] in,

[0067] The aqueous phase consists of: bamboo leaf oligosaccharides: 10%, 1,3-propanediol: 12%, erythritol: 6%, and purified water: 15%.

[0068] The oil phase includes: camellia seed oil: 12%, mango seed oil: 10%, coconut oil MCT: 4%, phytosterol esters: 4%, and rice bran wax microparticles: 4%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0069] The emulsification-stabilization system includes sucrose stearate: 3.5%, hydrogenated lecithin: 2.5%, and Sphingomonas fermentation polysaccharide: 0.7%.

[0070] The active repair phase includes ceramide NP: 0.8%, panthenol: 1.5%, ascorbyl palmitate: 0.6%, and perilla seed polyphenols: 1.2%.

[0071] The buffer-preservative-fragrance formula includes L-arginine: 0.2%, sodium gluconate: 0.5%, and natural juniper essential oil: 0.05%.

[0072] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0073] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0074] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0075] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0076] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0077] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0078] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0079] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0080] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0081] The detection data for Example 2 are as follows:

[0082] Appearance: Dark green paste with a rich, glossy finish;

[0083] pH: 5.9;

[0084] Viscosity: 34000 cP;

[0085] D50: 0.28µm;

[0086] -20℃ Extrusion force: 10N (≤15N is acceptable);

[0087] 90-minute water wash TEWL increase: 7%;

[0088] 8-hour moisture content: +38%;

[0089] Crack healing time: 2.9 days;

[0090] Residual oxygen: 0.5 ppm;

[0091] Centrifugation: No stratification;

[0092] Compared to the baseline: extrusion force decreased by 44% at -20℃, while water wash resistance increased by 2.3 times.

[0093] Example 3

[0094] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0095] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0096] in,

[0097] The aqueous phase consists of: bamboo leaf oligosaccharides: 6%, 1,3-propanediol: 8%, erythritol: 3%, and purified water: 25%.

[0098] The oil phase includes: camellia seed oil: 8%, mango seed oil: 6%, coconut oil MCT: 4%, phytosterol esters: 2%, and rice bran wax microparticles: 2%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0099] The emulsification-stabilization system includes: 2% sucrose stearate, 1.5% hydrogenated lecithin, and 0.3% sphingosine monosodium glutamate fermentation polysaccharide.

[0100] The active repair phase includes ceramide NP: 0.3%, panthenol: 0.8%, ascorbyl palmitate: 0.3%, and perilla seed polyphenols: 0.5%.

[0101] The buffer-preservative-fragrance formula includes L-arginine: 0.1%, sodium gluconate: 0.3%, and natural juniper essential oil: 0.03%.

[0102] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0103] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0104] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0105] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0106] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0107] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0108] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0109] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0110] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0111] The detection data for Example 3 are as follows:

[0112] Appearance: White, fine paste;

[0113] pH: 5.5;

[0114] Viscosity: 22000 cP;

[0115] D50: 0.23µm;

[0116] Extrusion force at -20℃: 13N;

[0117] 40-minute water wash TEWL increase: 10%;

[0118] 8-hour moisture content: +30%;

[0119] Crack healing: 4.0 days;

[0120] Residual oxygen: 0.7 ppm;

[0121] Patches applied to 30 people: 0 positive.

[0122] Compared to the baseline: HaCaT cell survival rate was 98%, and the patch was superior to the baseline of 0 / 30.

[0123] Example 4

[0124] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0125] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0126] in,

[0127] The aqueous phase consists of: bamboo leaf oligosaccharides: 9%, 1,3-propanediol: 11%, erythritol: 4%, and purified water: 16%.

[0128] The oil phase includes: camellia seed oil: 11%, mango seed oil: 9%, coconut oil MCT: 5%, phytosterol esters: 3%, and rice bran wax microparticles: 4%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0129] The emulsification-stabilization system includes sucrose stearate: 3%, hydrogenated lecithin: 2.2%, and Sphingosine monosodium glutamate fermentation polysaccharide: 0.6%.

[0130] The active repair phase includes ceramide NP: 0.7%, panthenol: 1.2%, ascorbyl palmitate: 0.5%, and perilla seed polyphenols: 1%.

[0131] The buffer-preservative-fragrance formula includes L-arginine: 0.18%, sodium gluconate: 0.45%, and natural juniper essential oil: 0.03%.

[0132] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0133] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0134] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0135] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0136] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0137] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0138] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0139] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0140] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0141] The detection data for Example 4 are as follows:

[0142] pH: 5.8;

[0143] Viscosity: 31000 cP;

[0144] After 20 cycles of 90 minutes of soap-based handwashing, the TEWL (total calorie intake) increased by 6%.

[0145] 8-hour moisture content: +33%;

[0146] Crack healing: 3.1 days;

[0147] Extrusion force at -20℃: 10N;

[0148] Compared to the baseline, the number of touch-ups required in healthcare settings decreased from 8 times per shift to 2 times per shift.

[0149] Example 5

[0150] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0151] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0152] in,

[0153] The aqueous phase consists of: bamboo leaf oligosaccharides: 10%, 1,3-propanediol: 12%, erythritol: 5%, and purified water: 14%.

[0154] The oil phase includes: camellia seed oil: 10%, mango seed oil: 8%, coconut oil MCT: 6%, phytosterol esters: 4%, and rice bran wax microparticles: 3%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0155] The emulsification-stabilization system includes sucrose stearate: 3.5%, hydrogenated lecithin: 2.5%, and Sphingomonas fermentation polysaccharide: 0.7%.

[0156] The active repair phase includes ceramide NP: 0.8%, panthenol: 1.5%, ascorbyl palmitate: 0.6%, and perilla seed polyphenols: 1.2%.

[0157] The buffer-preservative-fragrance formula includes L-arginine: 0.2%, sodium gluconate: 0.5%, and natural juniper essential oil: 0.05%.

[0158] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0159] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0160] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0161] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0162] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0163] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0164] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0165] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0166] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0167] The detection data for Example 5 are as follows:

[0168] pH: 5.9

[0169] Viscosity: 33500 cP;

[0170] Ceramide 7-day skin retention: +52% (HPLC);

[0171] MDA inhibition rate: 55%;

[0172] Crack healing: 2.8 days (fastest);

[0173] 8-hour moisture content: +37%;

[0174] Compared to the baseline: healing time decreased by 60%, and antioxidant activity increased by 31%.

[0175] Example 6

[0176] A new type of anti-freezing and anti-cracking hand cream, comprising, by weight percentage,

[0177] Aqueous phase, oil phase, emulsion-stabilization system, active repair phase and buffer-preservative-fragrance;

[0178] in,

[0179] The aqueous phase consists of: bamboo leaf oligosaccharides: 5%, 1,3-propanediol: 8%, erythritol: 3%, and purified water: 24%.

[0180] The oil phase includes: camellia seed oil: 8%, mango seed oil: 6%, coconut oil MCT: 4%, phytosterol esters: 2%, and rice bran wax microparticles: 2%; wherein, the D90 value of the rice bran wax microparticles is between 10 and 20 µm.

[0181] The emulsification-stabilization system includes: 2% sucrose stearate, 1.5% hydrogenated lecithin, and 0.3% sphingosine monosodium glutamate fermentation polysaccharide.

[0182] The active repair phase includes ceramide NP: 0.3%, panthenol: 0.8%, ascorbyl palmitate: 0.3%, and perilla seed polyphenols: 0.5%.

[0183] The buffer-preservative-fragrance formula includes L-arginine: 0.1%, sodium gluconate: 0.3%, and natural juniper essential oil: 0.03%.

[0184] A novel process for preparing an anti-freezing and anti-cracking hand cream includes the following steps:

[0185] S1, Aqueous Phase Dissolution: Add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence. In step S1, add purified water to the aqueous phase pot and stir at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol in sequence, with an interval of 1 minute between each bag to prevent clumping. In step S1, the conductivity at 25℃ should be 180~220 µScm⁻¹. Visual clarification indicates it is qualified. If the conductivity is >250 µScm⁻¹, stop feeding, rinse the pipeline with pure water, and retest.

[0186] S2, Oil Phase Dispersion: Camellia seed oil, mango seed oil, and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32-38℃. After melting, phytosterol esters and rice bran wax microparticles are added. The oil phase pot is rotated at 600 rpm for 5 minutes. In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration. If particles >50µm appear, high shear is started at 3000 rpm for 2 minutes, and the particle size is measured again.

[0187] S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃.

[0188] S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP.

[0189] S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min.

[0190] S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min.

[0191] S7. Vacuum degassing: Pour the material in the emulsification pot into the vacuum degassing tank and turn off the light; In step S7, residual oxygen ≤ 0.8ppm; viscosity 28000±2000cP is qualified; foam > 2cm, extend for 5min or add 0.02% silicone oil to defoam;

[0192] S8. Room temperature filling: Material temperature 20~25℃, through a 40-mesh bag filter, and filled by a filling pump. The filling amount is nominally 30g, with an error of ±1%.

[0193] The detection data for Example 6 are as follows:

[0194] Raw material costs decreased by 18% (compared to Example 1);

[0195] pH: 5.6;

[0196] Viscosity: 24000 cP;

[0197] 8-hour moisture content: +28%;

[0198] 40-minute water wash TEWL increase: 12%;

[0199] Crack healing: 4.2 days;

[0200] Extrusion force at -20℃: 12N;

[0201] Still outperforms industry benchmarks: extrusion power down 33%, water-washed TEWL down 29%, and cost close to mid-range glycerin cream.

[0202] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A novel anti-freezing and anti-cracking hand cream, characterized in that, By weight percentage, including Aqueous phase: 55~65%, oil phase: 28~38%, emulsification-stabilization system: 3~6%, active repair phase: 2~4%, buffer-preservative-fragrance: 0.3~0.8%; in, The aqueous phase comprises: bamboo leaf oligosaccharides: 5-10%, 1,3-propanediol: 8-12%, erythritol: 3-6%, and purified water: balance to 100% of the aqueous phase. The oil phase includes: camellia seed oil: 8-12%, mango seed oil: 6-10%, coconut oil MCT: 4-8%, phytosterol esters: 2-4%, and rice bran wax microparticles: 2-4%. The emulsification-stabilization system includes sucrose stearate: 2~3.5%, hydrogenated lecithin: 1.5~2.5%, and Sphingomonas fermentation polysaccharide: 0.3~0.7%.

2. The novel anti-freezing and anti-cracking hand cream as described in claim 1, characterized in that, In the particle size distribution of rice bran wax microparticles, the D90 value is between 10 and 20 µm.

3. The novel anti-freezing and anti-cracking hand cream as described in claim 1, characterized in that, The active repair phase includes ceramide NP: 0.3~0.8%, panthenol: 0.8~1.5%, ascorbate palmitate: 0.3~0.6%, and perilla seed polyphenols: 0.5~1.2%.

4. The novel anti-freezing and anti-cracking hand cream as described in claim 1, characterized in that, The buffer-preservative-fragrance formula includes L-arginine: 0.1~0.2%, sodium gluconate: 0.3~0.5%, and natural juniper essential oil: 0.03~0.08%.

5. A preparation process for a novel anti-freezing and anti-cracking hand cream, characterized in that, Includes the following steps, S1. Aqueous phase dissolution: Add purified water to the aqueous phase pot and stir it at 200 rpm. Then add erythritol, bamboo leaf oligosaccharide and 1,3-propanediol in sequence. S2, Oil phase dispersion: Camellia seed oil, mango seed oil and coconut oil MCT are placed in an oil phase pot and heated to melt at a temperature of 32~38℃; after melting, phytosterol esters and rice bran wax particles are added. The oil phase pot is rotated at 600 rpm and dispersed for 5 minutes. S3. Cold emulsification: The aqueous phase is filtered through an 80-mesh filter and poured into the oil phase pot. After being filtered through a 60-mesh filter, it is poured into the emulsification pot and pre-stirred at 700 rpm for 4 minutes. The output is then passed through a microjet at 80 MPa and circulated 3 times. The outlet temperature is ≤42℃. S4. Add the emulsification-stabilization system: sucrose stearate, hydrogenated lecithin and fermented polysaccharide. Premix by hand for 2 minutes, then slowly pour into the emulsification pot at 700 rpm for 10 minutes until the viscosity reaches 20,000~25,000 cP. S5. Add active repair phase: Heat the emulsification tank to 32±1℃, purge with nitrogen for 0.2m³h⁻¹, maintain positive pressure of 0.05MPa, dissolve ceramide + ascorbate palmitate in coconut oil MCT 60℃, cool to 32℃, and then vacuum-inhale into the emulsification tank; dilute panthenol + perilla polyphenols with water phase, and then spray into the emulsification tank at 400rpm for 5min. S6. Add buffer, preservative and fragrance: Temperature 25~30℃, stop nitrogen, switch to air 0.1MPa, add L-arginine, adjust pH to 5.5~6.0, pre-dissolve sodium gluconate, put into emulsifier, 200rpm, 5min; dilute juniper essential oil with ethanol, spray into emulsifier, 200rpm, 3min. S7. Vacuum degassing: Pour the material in the emulsifying pot into the vacuum degassing tank and turn off the light; S8, ambient temperature filling.

6. The preparation process of a novel anti-freezing and anti-cracking hand cream as described in claim 5, characterized in that, In step S1, purified water is added to the aqueous phase pot and stirred at 200 rpm. Then, erythritol, bamboo leaf oligosaccharide, and 1,3-propanediol are added sequentially, with a 1-minute interval between each bag to prevent clumping.

7. The preparation process of a novel anti-freezing and anti-cracking hand cream as described in claim 6, characterized in that, In step S1, the conductivity at 25°C should be 180~220µScm⁻¹. Visual clarification indicates it is acceptable. If the conductivity is >250µScm⁻¹, stop feeding, rinse the pipeline with pure water, and then retest.

8. The preparation process of a novel anti-freezing and anti-cracking hand cream as described in claim 5, characterized in that, In step S2, the wax microparticles are considered qualified if they are uniformly suspended and there is no visible agglomeration; if particles >50µm appear, high shear is initiated at 3000rpm for 2min and the particle size is measured again.

9. The preparation process of a novel anti-freezing and anti-cracking hand cream as described in claim 5, characterized in that, In step S7, residual oxygen ≤ 0.8 ppm; viscosity 28000±2000 cP is acceptable; foam > 2 cm, extend for 5 min or add 0.02% silicone oil to defoam.

10. The preparation process of a novel anti-freezing and anti-cracking hand cream as described in claim 5, characterized in that, In step S8, the specific operation of room temperature filling is as follows: the material temperature is 20~25℃, and the material is filled through a 40-mesh bag filter and a filling pump. The filling amount is nominally 30g with an error of ±1%.