Chelant-free bio-based shampoo composition and method of making and use thereof

Abstract

The present application belongs to the technical field of daily chemical cleaning products, and particularly relates to a biological-based shampoo composition without chelating agent and a preparation method and application thereof, wherein the biological-based shampoo composition comprises the following components in percentage by mass: 12-15% of a biological-based surfactant compound system, 3-6% of a humectant, 0.5-0.7% of a thickening agent, 0.2-0.5% of a conditioning agent, 0.2-0.5% of a preservative, 0.1-0.2% of a pH regulator and 0.05-0.2% of a fragrance, and the balance is deionized water; the biological-based carbon content is greater than or equal to 90%; and no chelating agent is included.Compared with the prior art, the present application solves the problems of the prior art, i.e., the activity of a full biological-based surfactant system without a chelating agent is reduced in hard water, and the stability is poor.Under the condition that no chelating agent is added, the product still has excellent hard water resistance and stable activity.

Description

Technical Field

[0001] This invention belongs to the technical field of daily chemical cleaning products, and in particular relates to a chelating agent-free bio-based shampoo composition, its preparation method and application. Background Technology

[0002] As a core product for daily washing, the formula design of shampoo directly affects its cleaning effect, skin-friendliness, and environmental safety.

[0003] Most existing shampoo products use petroleum-based synthetic surfactants, but petroleum-based materials have low biodegradability, which may pollute the water environment, and may also cause problems such as dryness, tightness, and strong irritation during the cleaning process.

[0004] Meanwhile, to enhance cleaning power in hard water environments, most shampoos on the market currently add chelating agents such as disodium EDTA. For example, CN112870118A discloses a herbal shampoo that uses sodium phytate as a chelating agent, and CN116407487A discloses a mild hydrosol amino acid shampoo that uses disodium EDTA as a chelating agent. These chelating agents reduce water hardness by binding calcium and magnesium ions, thus ensuring the cleaning activity of surfactants. However, the addition of chelating agents brings some problems: on the one hand, chelating agents can bind with trace elements on the skin surface, and long-term use can easily disrupt the skin's microecological balance and reduce the skin barrier's defense capabilities; on the other hand, wastewater containing chelating agents, when discharged into natural water bodies, will chelate mineral ions in the water, affecting the normal metabolism of aquatic organisms and damaging the aquatic ecosystem, which contradicts the current trend of green and environmentally friendly industry development.

[0005] Existing technologies have disclosed bio-based surfactant shampoo solutions that do not introduce chelating agents. For example, CN114224765A discloses an amino acid shampoo and its preparation method, which uses an amino acid surfactant in combination with an amphoteric surfactant without introducing chelating agents. This solution achieves an environmentally friendly design without chelating agents by leveraging the mildness and cleaning properties of the surfactants themselves, aligning with the development trend of green daily chemicals. However, in-depth analysis reveals that existing chelate-free bio-based surfactant shampoo solutions generally suffer from a core defect: poor stability in hard water. This is a key bottleneck hindering the industrialization and promotion of such solutions and preventing them from meeting practical application needs.

[0006] Specifically, existing bio-based surfactants (such as conventional alkyl glycosides (APG) and single amino acid surfactants) lack functional groups in their molecular structures that can resist interference from calcium and magnesium ions in hard water (this is often overcome by introducing chelating agents, thus existing formulations without chelating agents are difficult to resist interference from calcium and magnesium ions in hard water). In hard water environments, surfactant molecules easily combine with calcium and magnesium ions in hard water to form insoluble soap scum or precipitates, leading to reduced surfactant activity, system stratification, crystallization, and other unstable phenomena. Simultaneously, the interference from hard water ions significantly weakens the foaming performance, wetting properties, and detergency of shampoos, resulting in problems such as insufficient foam, incomplete cleaning, and difficulty rinsing, affecting the user experience. Furthermore, the generated soap scum adheres to the hair surface, causing dryness and frizz, failing to achieve the core efficacy of personal care products and limiting the practical application scenarios of chelate-free bio-based shampoos. Summary of the Invention

[0007] The purpose of this invention is to address at least one of the aforementioned problems by providing a chelating agent-free bio-based shampoo composition, its preparation method, and its application. This addresses the issues of decreased activity and poor stability in hard water exhibited by existing fully bio-based surfactant systems without the addition of chelating agents. This solution uses fully bio-based surfactants as the core of the shampoo composition. Even without adding any chelating agents, the product maintains excellent hard water tolerance and stable activity. Simultaneously, the product boasts a high biodegradability rate, is environmentally friendly, gentle on the skin, and combines environmental friendliness, stability, and user comfort, filling a gap in the existing technology.

[0008] The objective of this invention is achieved through the following technical solution: The first aspect of this invention discloses a chelating agent-free bio-based shampoo composition, comprising the following components by weight percentage: The formula contains 12%-15% bio-based surfactants, 3%-6% humectants, 0.5%-0.7% thickeners, 0.2%-0.5% conditioning agents, 0.2%-0.5% preservatives, 0.1%-0.2% pH adjusters, and 0.05%-0.2% fragrances, with the balance being deionized water. The bio-based shampoo composition has a bio-based carbon content of ≥ 90%; The bio-based shampoo composition does not contain chelating agents.

[0009] Preferably, the bio-based surfactant compound system is composed of dodecyl furanone sulfonate, hexadecyl furanone sulfonate, and octadecyl furanone sulfonate; The mass ratio of dodecyl furanone sulfonate, hexadecyl furanone sulfonate and octadecyl furanone sulfonate is 3.0-3.5:1.5-2.0:0.7-1.2.

[0010] Preferred, including: The moisturizer is glycerin; and / or, The thickener is xanthan gum; and / or, The conditioning agent is guar hydroxypropyltrimethylammonium chloride; and / or, The pH adjuster is citric acid; and / or, The preservative is a combination of capryloyl hydroxamic acid, glyceryl caprylate, and ethylhexylglycerin.

[0011] A second aspect of this invention discloses a method for preparing a chelating agent-free bio-based shampoo composition as described in any of the preceding claims, comprising the following steps: S1: Take a portion of deionized water, add thickener and conditioning agent, heat and stir until completely dissolved and transparent to obtain the first intermediate liquid; S2: Maintain the temperature of the first intermediate liquid obtained in step S1, and add the bio-based surfactant compound system and humectant in sequence, stirring until the system is homogeneous to obtain the second intermediate liquid; S3: Add preservative to the second intermediate liquid obtained in step S2, adjust the pH of the system to weakly acidic by pH adjuster, and add the remaining deionized water to obtain the third intermediate liquid; S4: After cooling the third intermediate liquid obtained in step S3, add fragrance, homogenize and let stand to obtain the bio-based shampoo composition.

[0012] Preferably, in step S1, the portion of deionized water constitutes 75%-80% of the total mass of deionized water.

[0013] Preferably, in step S1, the temperature of the heating and stirring is 50-60 ℃.

[0014] Preferably, in step S2, the temperature for maintaining the temperature is 40-50 °C.

[0015] Preferably, in step S3, the weakly acidic pH is 5.5-6.5.

[0016] The third aspect of the present invention discloses the use of a non-chelating bio-based shampoo composition as described in any of the preceding claims in shampoo.

[0017] Preferably, the shampoo has an average stability of level 3 according to the hard water stability test in GB / T 7381-2010.

[0018] The working principle of this invention is as follows: This invention utilizes novel furan-type bio-based surfactants (dodecyl furanone sulfonate, hexadecyl furanone sulfonate, and octadecyl furanone sulfonate) to fundamentally impart excellent hard water stability to the system. Specifically, the precise introduction of sulfonate hydrophilic groups (-SO3) into the molecular structure of the furan-type bio-based surfactants... - ( ), is the core functional group that resists interference from hard water ions. Its extremely strong hydrophilicity allows it to react with Ca in hard water. 2+ Mg 2+ It forms a stable soluble complex structure, thereby effectively avoiding the reduction of surfactant activity and the formation of soap scum; at the same time, the steric hindrance effect of the furan ring hydrophobic group can prevent the aggregation of hard water ions and surfactant molecules, further weakening the damage of hard water ions to the surfactant system, and forming a dual anti-hard water synergistic effect of "complexation + steric hindrance" with the sulfonate group.

[0019] This invention introduces natural thickeners and conditioning agents (xanthan gum and guar gum hydroxypropyltrimethylammonium chloride) into a compound system. These agents, together with the bio-based surfactant compound system, form a multi-dimensional synergistic effect, further enhancing hard water stability. On one hand, xanthan gum and guar gum hydroxypropyltrimethylammonium chloride have excellent thickening and suspending effects, which can increase the viscosity of the shampoo system, form a stable colloidal structure, inhibit the precipitation, aggregation, and stratification caused by the combination of hard water ions and surfactant molecules, and simultaneously encapsulate hard water ions, reducing their contact probability with surfactant molecules and helping to improve the hard water resistance effect. On the other hand, the hydrophilic groups of these natural plant thickeners can form hydrogen bonds with the sulfonate groups and amino acid groups of bio-based surfactant molecules, further stabilizing the surfactant micelle structure and improving the system's resistance to interference in hard water environments. This solution does not add any chelating agents, thus avoiding the environmental pollution problems that chelating agents may cause. Through the combined synergistic effect of each component, it can achieve excellent hard water stability without relying on chelating agents. This not only conforms to the concept of green environmental protection, but also fundamentally overcomes the core defect of existing chelating agent-free bio-based surfactant shampoos with poor hard water stability.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. High bio-based carbon content + no chelating agents, a dual breakthrough in environmental protection and ecology: The core surfactant system of this invention has a bio-based carbon content of ≥ 90%, and the overall product has prominent bio-based properties, which is in line with the "dual carbon" development goal; no chelating agents are added in the entire formula and preparation process, which not only avoids the damage of chelating agents to the skin micro-ecology, but also eliminates their impact on the aquatic ecology, which is far higher than the national standard for easy biodegradability (≥ 90%), and achieves environmental friendliness throughout the entire life cycle from raw materials to finished products.

[0021] 2. The surfactant itself resists hard water, and has excellent compatibility with hard water without chelating agents: This invention achieves excellent hard water resistance by precisely compounding high bio-based carbon content surfactants and utilizing the molecular structure characteristics of the surfactants themselves. It can stably adapt to hard water environments without relying on chelating agents, solving the industry pain point that existing bio-based shampoos have poor hard water resistance without chelating agents, and is suitable for the cleaning needs of different water quality areas.

[0022] 3. Excellent detergency performance, with no reduction in cleaning power even without chelating agents. The high bio-based carbon content surfactant system of this invention does not significantly reduce its cleaning power against artificial oil stains, sebum stains, and carbon black stains in hard water environments under the condition of no chelating agents, achieving a triple unity of "high bio-based, no chelating agents, and high-efficiency detergency".

[0023] Compared to existing technologies, the furan-type bio-based surfactant used in this invention has strong hydrophilicity and can react with Ca in hard water. 2+ Mg 2+ It forms a stable soluble complex structure (rather than an insoluble precipitate), preventing surfactant molecules from being destroyed by hard water ions, while also inhibiting soap scum formation, thus fundamentally improving the hard water stability of the system. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments, but these are not intended to limit the invention. It should be noted that the following embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] Unless otherwise specified in the following description, the reagents used are conventional commercial products, the methods used are well-known in the art, and any other matters not covered herein may be handled using existing technologies.

[0026] A shampoo composition containing bio-based surfactants without chelating agents. The shampoo composition does not contain chelating agents. The core active ingredient is a bio-based surfactant compound system at a mass percentage of 12%-15%. It also includes 3%-6% of moisturizer, 0.5%-0.7% of thickener, 0.2%-0.5% of conditioner, 0.2%-0.5% of preservative, 0.1%-0.2% of pH adjuster, and 0.05%-0.2% of fragrance, with the remainder being deionized water.

[0027] A chelating agent-free bio-based surfactant shampoo composition, wherein the bio-based surfactant compound system consists of dodecyl furanone sulfonate, hexadecyl furanone sulfonate and octadecyl furanone sulfonate, in a mass ratio of 3.0-3.5: 1.5-2.0: 0.7-1.2.

[0028] A shampoos with a non-chelating bio-based surfactant, wherein the moisturizer is glycerin, the thickener is xanthan gum, the conditioning agent is guar hydroxypropyltrimethylammonium chloride, the pH adjuster is citric acid, and the preservative is a compound combination of capryloyl hydroxamic acid, glyceryl caprylate, and ethylhexylglycerin; the fragrance can be selected according to the target requirements.

[0029] A shampoos with a non-chelating bio-based surfactant composition, the stability of the shampoo in hard water was evaluated according to GB / T 7381-2010, and the average stability assessment was grade 3.

[0030] A shampoos with a non-chelating bio-based surfactant, having a bio-based carbon content ≥ 90%.

[0031] A method for preparing a chelating agent-free bio-based surfactant shampoo composition: A portion of deionized water is added to a reaction vessel, along with a thickener and conditioning agent. The mixture is heated to 50-60 °C and stirred until completely dissolved and transparent. The temperature is maintained at 40-50 °C, and the bio-based surfactant compound system and humectant are added sequentially, stirring until the system is homogeneous. Preservatives (a compound of capryloyl hydroxamic acid, glyceryl caprylate, and ethylhexylglycerin) are then added. The pH of the system is adjusted to 5.5-6.5 using a pH adjuster. The remaining deionized water is added, and the mixture is cooled to room temperature before adding the fragrance. After homogenization, the mixture is allowed to stand for 4 hours to obtain the finished product.

[0032] Example 1 A chelating agent-free bio-based surfactant shampoo, with the following formula per 100 g total mass: Bio-based surfactants (dodecyl furanone sulfonate, hexadecyl furanone sulfonate, octadecyl furanone sulfonate (mass ratio: 3.0:1.5:0.7) 12 g, glycerol 3 g, xanthan gum 0.5 g, guar gum hydroxypropyltrimethylammonium chloride 0.2 g, ethylhexylglycerol 0.1 g, capryloyl hydroxamic acid 0.15 g, glyceryl caprylate 0.15 g, citric acid 0.15 g, fragrance 0.1 g, deionized water to 100 g.

[0033] The shampoo is prepared according to the preparation method of the present invention, and the specific steps are as follows: Add 75%-80% of the total amount of deionized water to a clean reactor, turn on the stirring device, control the stirring speed at 300-400 r / min, and slowly add xanthan gum and guar gum hydroxypropyltrimethylammonium chloride. Then heat the reactor to 50-60 ℃ and keep it at a constant temperature for 25-30 minutes until xanthan gum and guar gum hydroxypropyltrimethylammonium chloride are completely dissolved. Maintain the temperature inside the reactor at 40-50 ℃, and slowly add the bio-based surfactant compound system and glycerin in sequence, stirring continuously until the raw materials are completely dissolved, and the system is uniform without particles or stratification. Add preservatives capryloyl hydroxamic acid, glyceryl caprylate, and ethylhexylglycerin, stir well, then add citric acid to adjust the pH to 5.5-6.5, and then add the remaining deionized water. Turn off the heating device of the reactor and allow it to cool naturally to room temperature (25±2 ℃). Add the fragrance and homogenize at 3000-4000 rpm for 5-8 minutes. After homogenization, let it stand for 4 hours to remove surface bubbles and obtain the finished product.

[0034] Hard water stability test (GB / T 7381-2010) Hard water solution (prepared according to GB / T 6367-1997): S1 hard water: c(1 / 2 Ca 2+ S2 hard water: c(1 / 2 Ca) = 6 mmol / L 2+ S3 hard water: c(1 / 2 Ca) = 9 mmol / L 2+ =12 mmol / L.

[0035] Weigh 50.00 g (accurate to 0.01 g) of the surfactant sample to be tested and place it in a 1000 mL beaker. Add an appropriate amount of distilled water, stir to dissolve, and cool to room temperature. Transfer the solution to a 1000 mL volumetric flask and dilute to the mark with distilled water. Divide the 15 colorimetric tubes into 3 groups (5 tubes per group), labeled S1, S2, and S3, corresponding to three hard water solutions. Use a pipette to add 5.0 mL, 2.5 mL, 1.2 mL, 0.6 mL, and 0.3 mL of the sample solution to the 5 colorimetric tubes in each group, respectively.

[0036] Add S1 hard water to the S1 group centrifuge tubes to the 50 mL mark, add S2 hard water to the S2 group to the mark, and add S3 hard water to the S3 group to the mark. Tightly cap the centrifuge tubes and slowly invert them 10 times at a rate of once per second. Let all centrifuge tubes stand for 1-2 hours. Immediately after removal, observe and record the appearance of the solution in each centrifuge tube at room temperature. If the samples show no significant difference in stability at this temperature (e.g., all are in a clear state), adjust the water bath temperature to 50±3 ℃ and repeat the above standing and observation steps. The appearance score and average stability judgment criteria are shown in Tables 1 and 2.

[0037] Table 1 Appearance Evaluation Criteria (GB / T 7381-2010) Table 2. Average stability assessment (based on GB / T 7381-2010) The total scores of the five colorimetric tubes in groups S1, S2, and S3 were calculated respectively, and the stability level of each group was determined according to Tables 1 and 2. The average stability level of Example 1 was found to be level 3.

[0038] The average stability of Example 1 can be improved from 2 to 3 compared with that of Comparative Example 2 (the specific data of Comparative Example 2 are described in the following related description).

[0039] Decontamination performance test (GB / T 13174-2021) Preparation of test pieces and reagents: Select JB-01 carbon black oil-stained cloth, JB-02 protein-stained cloth, and JB-03 sebum-stained cloth, and cut them into circular test pieces with a diameter of 6 cm. Divide the cloths of the same batch into a sample group with uniform color and a standard detergent group, with no less than 4 test pieces of each type in each group; prepare hard water with a concentration of 250 mg / kg CaCO3, and prepare standard laundry detergent (SLD) as a reference detergent according to Appendix B of GB / T 13174-2021.

[0040] Basic whiteness determination: A fluorescent whiteness meter was used to measure the whiteness at two points symmetrically located on the front of the test piece. Each test piece was measured a total of 4 times, and the average value was taken as the whiteness value F1 before washing.

[0041] Washing and rinsing procedures: Test solutions of the shampoo of this invention and the standard detergent were prepared using 250 mg / kg hard water, with a concentration of 0.2% for both. The test pieces with the whiteness measured before washing were grouped, spread out, and put into the test machine. The stirring speed was controlled at 120 r / min and the temperature at 30±1 ℃, and the samples were washed at a constant temperature for 20 min. After washing, the test pieces were removed, placed in a rinser and spun dry for 15 s. Then, 1500 mL of tap water was added and the samples were rinsed alternately in both directions for 30 s. The rinsing and spun-drying operations were repeated a total of 4 times. The test pieces were then air-dried flat at room temperature.

[0042] Whiteness determination after washing: Measure the whiteness value of the dried test piece using the same location and method as in the above steps, and take the average value as the whiteness value F2 after washing.

[0043] Result calculation and verification: According to formula R i =∑(F 2i -F 1i The decontamination value is calculated as F / n, where F 2i F represents the whiteness value of the i-th soiled fabric sample after washing. 1i Let n be the whiteness value of the i-th type of soiled fabric sample before washing, and n be the number of valid samples after Q-value testing at a 90% confidence level. The result is rounded to one decimal place. According to formula P... i =R i s / R io Calculate the decontamination ratio, where R i s R represents the detergency rating of the shampoo of this invention. i o The stain removal value is the standard detergent value, and the result is rounded to one decimal place.

[0044] R in Example 1 i and P i As shown in Tables 3 and 4 below.

[0045] Table 3 Ri values ​​for standard detergents and Example 1 Table 4 Pi values ​​for Example 1 Based on the stain removal values ​​and stain removal ratios of JB-01, JB-02, and JB-03 in Example 1 of Tables 3 and 4, according to the national standard, their stain removal power is comparable to that of standard detergents, and there are no cases where the stain removal value is too low, demonstrating balanced stain removal performance without any shortcomings.

[0046] Bio-based carbon content calculation Define the complete formula of the sample to be calculated and calculate the mass percentage / mass value of each component (based on 100 g).

[0047] All components in the formulation are classified according to their carbon properties into three categories: fully bio-based carbon-containing components, non-bio-based carbon-containing components, and carbon-free components; among them, carbon-free components contain no organic carbon and are not included in subsequent calculations.

[0048] Consult / select the organic carbon content values ​​for each carbon-containing component (using theoretical values ​​calculated from chemical molecular formulas or industry-standard measured averages). Calculate the organic carbon mass of each carbon-containing component: Organic carbon mass of a single component = Component mass × Organic carbon content of that component.

[0049] Calculate the total organic carbon mass in the sample: Total organic carbon mass = Sum of organic carbon mass of all bio-based carbon-containing components + Sum of organic carbon mass of all non-bio-based carbon-containing components.

[0050] Calculate the total mass of bio-based organic carbon in the sample: Total mass of bio-based organic carbon = Sum of the organic carbon masses of all bio-based carbon-containing components.

[0051] To calculate the bio-based carbon content, use the following formula: Bio-based carbon content (%) = (Total mass of bio-based organic carbon / Total mass of organic carbon) × 100%.

[0052] Calculations showed that the bio-based carbon content of Example 1 was ≥ 90%, while the bio-based carbon content of commercially available products (such as Vidal Sassoon Volumizing Oil Control Shampoo) was 25-35%. Compared with commercially available products, the bio-based carbon content of Example 1 was significantly increased.

[0053] Example 2 A chelating agent-free bio-based surfactant shampoo, with the following formula per 100 g total mass: Bio-based surfactants (dodecyl furanone sulfonate, hexadecyl furanone sulfonate, octadecyl furanone sulfonate (mass ratio: 3.5:2.0:1.2) 15 g, glycerol 6 g, xanthan gum 0.7 g, guar gum hydroxypropyltrimethylammonium chloride 0.5 g, ethylhexylglycerol 0.1 g, capryloyl hydroxamic acid 0.15 g, glyceryl caprylate 0.15 g, citric acid 0.15 g, fragrance 0.1 g, deionized water to 100 g.

[0054] The preparation method is the same as in Example 1.

[0055] Hard water stability test (GB / T 7381-2010) The experimental methods and evaluation criteria are the same as in Example 1.

[0056] The average stability of Example 2 can be improved from 2 to 3 compared with that of Comparative Example 2 (the specific data of Comparative Example 2 are described in the following related description).

[0057] Decontamination performance test (GB / T 13174-2021) The experimental and calculation methods are the same as in Example 1.

[0058] R in Example 2 i and P i See Tables 5 and 6 below.

[0059] Table 5 Ri values ​​for standard detergents and Example 2 Table 6 Pi values ​​for Example 2 Based on the stain removal values ​​and stain removal ratios of JB-01, JB-02, and JB-03 in Example 2 of Tables 5 and 6, according to the national standard, their stain removal power is comparable to that of standard detergents, and there are no cases where the stain removal value is too low, demonstrating balanced stain removal performance without any shortcomings.

[0060] Bio-based carbon content calculation The experimental method is the same as in Example 1.

[0061] Calculations showed that the bio-based carbon content of Example 2 was ≥ 90%, while the bio-based carbon content of commercially available products (such as Vidal Sassoon Volumizing Oil Control Shampoo) was 25-35%. Compared with commercially available products, the bio-based carbon content of Example 2 was significantly increased.

[0062] The test results above show that the detergency performance of Examples 1 and 2 is targeted (powerful cleaning of sebum stains), balanced (no weakness in cleaning multiple types of stains), and superior. The bio-based surfactant formula without chelating agents has a bio-based carbon content of ≥ 90%, and it still maintains high detergency under the environmentally friendly formula design, which has practical application value.

[0063] Comparative Example 1 A chelating agent-free bio-based surfactant shampoo, with the following formula per 100 g total mass: Bio-based surfactant (octadecyl furanone sulfonate) 15 g, glycerol 6 g, xanthan gum 0.7 g, guar gum hydroxypropyltrimethylammonium chloride 0.5 g, ethylhexylglycerol 0.1 g, capryloyl hydroxamic acid 0.15 g, glyceryl caprylate 0.15 g, citric acid 0.15 g, fragrance 0.1 g, deionized water to 100 g.

[0064] The preparation method is the same as in Example 1.

[0065] Hard water stability test (GB / T 7381-2010) The experimental methods and evaluation criteria are the same as in Example 1.

[0066] The average stability of Comparative Example 1 was grade 3, which was comparable to that of Examples 1 and 2, which also lacked chelating agents but were composed of bio-based surfactants (dodecyl furanone sulfonate, hexadecyl furanone sulfonate, octadecyl furanone sulfonate).

[0067] Decontamination performance test (GB / T 13174-2021) The experimental and calculation methods are the same as in Example 1.

[0068] Comparative Example 1 R i and P i See Tables 7 and 8 below.

[0069] Table 7 Ri values ​​of standard detergent and Comparative Example 1 Table 8. Pi values ​​of Comparative Example 1 Based on the detergency and detergency ratio values ​​of Comparative Example 1 (JB-01, JB-02, and JB-03) in Tables 7 and 8, and according to the national standard judgment criteria, the detergency of Comparative Example 1, which uses a single bio-based surfactant, is lower than that of Examples 1 and 2. This indicates that the combination of three bio-based surfactants (dodecyl furanone sulfonate, hexadecyl furanone sulfonate, and octadecyl furanone sulfonate) can synergistically improve the detergency performance in multiple dimensions.

[0070] Bio-based carbon content calculation The experimental method is the same as in Example 1.

[0071] Calculations showed that the bio-based carbon content of Comparative Example 1 was ≥ 90%, which is still high compared to Examples 1 and 2.

[0072] Comparative Example 2 A petroleum-based surfactant shampoo without chelating agents, with the following formula per 100 g total mass: 15 g of petroleum-based surfactant (sodium dodecylbenzenesulfonate), 6 g of glycerin, 0.7 g of xanthan gum, 0.5 g of guar hydroxypropyltrimethylammonium chloride, 0.1 g of ethylhexylglycerin, 0.15 g of capryloyl hydroxamic acid, 0.15 g of glyceryl caprylate, 0.15 g of citric acid, 0.1 g of fragrance, and deionized water to a total of 100 g.

[0073] The preparation method is the same as in Example 1.

[0074] Hard water stability test (GB / T 7381-2010) The experimental methods and evaluation criteria are the same as in Example 1.

[0075] The average stability of Comparative Example 2 was 2, which is 1 level lower than that of Examples 1, 2 and Comparative Example 1, which also have no chelating agent but are composed of bio-based surfactants. This demonstrates the good hard water stability of bio-based surfactants.

[0076] Decontamination performance test (GB / T 13174-2021) The experimental and calculation methods are the same as in Example 1.

[0077] Comparative Example 2 R i and P i See Tables 9 and 10 below.

[0078] Table 9 Ri values ​​of standard detergent and Comparative Example 2 Table 10 Pi values ​​of Comparative Example 2 Based on the detergency and detergency ratio values ​​of Comparative Example 2 (JB-01, JB-02, and JB-03) in Tables 9 and 10, according to the national standard, their detergency is comparable to that of standard detergents, and there are no cases where the detergency value is too low. Compared with Examples 1 and 2, it can be seen that the detergency performance of Examples 1 and 2 has no obvious shortcomings. It can also be seen that the use of bio-based surfactants in combination can improve the average stability and detergency of shampoo at the same time compared with the use of a single bio-based surfactant (when using a single bio-based surfactant, only one indicator can approach the performance of the combination).

[0079] Bio-based carbon content calculation The experimental method is the same as in Example 1.

[0080] The bio-based carbon content of Comparative Example 2 was calculated to be 75-80%. Compared with Examples 1 and 2, the bio-based carbon content of Comparative Example 2 decreased. However, since other ingredients in the formula are bio-based, the bio-based carbon content of Comparative Example 2 is still significantly higher than that of commercially available products (such as Vidal Sassoon Volumizing Oil Control Shampoo).

[0081] The test results above show that the detergency performance of Examples 1 and 2 is targeted (powerful cleaning of sebum stains), balanced (no weakness in cleaning multiple types of stains), and superior. The bio-based surfactant formula without chelating agents has a bio-based carbon content of ≥ 90%, and it still maintains high detergency under the environmentally friendly formula design, which has practical application value.

[0082] In summary, the shampoo prepared by this invention has good hard water resistance without the addition of chelating agents, and is also highly biodegradable and environmentally friendly. It combines gentle cleaning and environmental protection characteristics and is suitable for daily washing and care of all types of hair.

[0083] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A chelating agent-free bio-based shampoo composition, characterized in that, Calculated by mass percentage, it includes the following components: The formula contains 12%-15% bio-based surfactants, 3%-6% humectants, 0.5%-0.7% thickeners, 0.2%-0.5% conditioning agents, 0.2%-0.5% preservatives, 0.1%-0.2% pH adjusters, and 0.05%-0.2% fragrances, with the balance being deionized water. The bio-based shampoo composition has a bio-based carbon content of ≥ 90%; The bio-based shampoo composition does not contain chelating agents.

2. The chelate-free bio-based shampoo composition according to claim 1, characterized in that, The aforementioned bio-based surfactant compound system consists of dodecyl furanone sulfonate, hexadecyl furanone sulfonate, and octadecyl furanone sulfonate; The mass ratio of dodecyl furanone sulfonate, hexadecyl furanone sulfonate and octadecyl furanone sulfonate is 3.0-3.5:1.5-2.0:0.7-1.

2.

3. The chelate-free bio-based shampoo composition according to claim 1, characterized in that, include: The moisturizer is glycerin; and / or, The thickener is xanthan gum; and / or, The conditioning agent is guar hydroxypropyltrimethylammonium chloride; and / or, The pH adjuster is citric acid; and / or, The preservative is a combination of capryloyl hydroxamic acid, glyceryl caprylate, and ethylhexylglycerin.

4. A method for preparing a chelating agent-free bio-based shampoo composition as described in any one of claims 1-3, characterized in that, Includes the following steps: S1: Take a portion of deionized water, add thickener and conditioning agent, heat and stir until completely dissolved and transparent to obtain the first intermediate liquid; S2: Maintain the temperature of the first intermediate liquid obtained in step S1, and add the bio-based surfactant compound system and humectant in sequence, stirring until the system is homogeneous to obtain the second intermediate liquid; S3: Add preservative to the second intermediate liquid obtained in step S2, adjust the pH of the system to weakly acidic by pH adjuster, and add the remaining deionized water to obtain the third intermediate liquid; S4: After cooling the third intermediate liquid obtained in step S3, add fragrance, homogenize and let stand to obtain the bio-based shampoo composition.

5. The method for preparing a chelating agent-free bio-based shampoo composition according to claim 4, characterized in that, In step S1, the portion of deionized water is 75%-80% of the total mass of deionized water.

6. The method for preparing a chelating agent-free bio-based shampoo composition according to claim 4, characterized in that, In step S1, the temperature of the heating and stirring is 50-60 ℃.

7. The method for preparing a chelating agent-free bio-based shampoo composition according to claim 4, characterized in that, In step S2, the temperature for maintaining the temperature is 40-50 ℃.

8. The method for preparing a chelating agent-free bio-based shampoo composition according to claim 4, characterized in that, In step S3, the weakly acidic pH is 5.5-6.

5.

9. The use of a non-chelating bio-based shampoo composition as described in any one of claims 1-3 in shampoo.

10. The application according to claim 9, characterized in that, According to GB / T 7381-2010, the average stability of the shampoo is grade 3, which is tested for hard water stability.

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