A high solids stable pure liquid type dishwashing condensation bead composition and a method for preparing the same

Abstract

The present application provides a high solid content stable pure liquid type dishwashing bead composition and a preparation method thereof. In the high concentration system with a solid content of 65-75%, the present application uses xanthan gum as a three-dimensional network structure support, and through a high shear homogenization process, the xanthan gum molecular chain is fully stretched, and the originally incompatible components such as non-ionic surfactants, acrylic polymers and high-concentration chelating agents are uniformly 'locked' in the gel network, forming a high solid content stable pure liquid type dishwashing bead composition, solving the technical problem that the prior art cannot simultaneously stabilize the high content non-ionic surfactants, polymers and chelating agents under the conditions of high solid content (≥65%) and high electrolyte, and at the same time, realizing the near-neutral mildness and tableware protection.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, specifically to a pure liquid dishwashing pod composition with high solids content and stable properties, and its preparation method. Background Technology

[0002] Dishwasher pods are a type of detergent dispensed per unit volume, favored by consumers for their ease of use and accurate dosage. Currently, dishwashing pods are mainly categorized into powder multi-chamber type, powder-liquid mixture type, and pure liquid type.

[0003] The existing technology has the following drawbacks: Incompatibility issues at high solids content: To achieve strong detergency and shine, formulations need to contain high levels of nonionic surfactants, specific polymers (such as acrylic copolymers), and high concentrations of chelating agents. Under high solids content (≥65%) conditions, these components are highly susceptible to phase separation, gel precipitation, or salting out, leading to material stratification and making stable filling impossible.

[0004] Thickening challenges in high electrolyte environments: High concentrations of chelating agents (such as GLDA, with a content of about 30%) result in high ionic strength, making traditional thickeners (such as carbomer and hydroxyethyl cellulose) prone to failure or flocculation in this environment.

[0005] pH contradiction: Traditional dishwashing products usually maintain a strong alkaline state (pH>10) to achieve the effect of removing scale, which is highly irritating to the skin and can easily damage the glaze of delicate tableware.

[0006] Long-term storage stability: Existing technologies struggle to achieve long-term stability under multiple constraints such as high solid content, high electrolyte content, and near-neutral pH.

[0007] Therefore, there is an urgent need in the field for a pure liquid dishwashing pod composition that can stably coexist with incompatible components under conditions of high solid content and high electrolyte, and that combines mildness and protection of tableware.

[0008] In conclusion, a new technical solution is urgently needed to address the problems existing in the current technology. Summary of the Invention

[0009] Based on this, the present invention provides a high-solids-content stable pure liquid dishwashing pod composition and its preparation method. The present invention aims to provide a high-solids-content stable pure liquid dishwashing pod composition, solving the technical problem of existing technologies being unable to simultaneously and stably combine high-content nonionic surfactants, polymers, and chelating agents under high solids content (≥65%) and high electrolyte conditions, while simultaneously achieving near-neutral mildness and dishware protection.

[0010] One object of the present invention is to provide a high-solids-content stable pure liquid dishwashing pod composition, the high-solids-content stable pure liquid dishwashing pod composition comprising a water-soluble film and a liquid material encapsulated within the water-soluble film; The liquid material comprises the following components by mass fraction: Nonionic surfactants 15-35% Acrylic polymers 2-8% Chelating agent 20-50% Xanthan gum 0.1-1% pH adjuster 1-5% Additives 0.1-10% Polyols 8-25% Water content: 18-40%.

[0011] Furthermore, the pH value of the liquid material is 6.5-7.5; the nonionic surfactant, acrylic polymer and chelating agent are incompatible systems at room temperature; the solid content of the material is 65-75%; the liquid material is a homogeneous phase within 24 hours after preparation, and no irreversible phase separation, precipitation or gel shrinkage occurs during the filling and sealing process and within 30 days after sealing.

[0012] Furthermore, the nonionic surfactant is a fatty alcohol polyoxyethylene ether with an alkyl carbon chain number of C8-C18 and an ethylene oxide addition number of 5-15.

[0013] Furthermore, the polymer is a hydrophobically modified acrylic copolymer.

[0014] Furthermore, the chelating agent is selected from one or more of sodium citrate, sodium glutamate diacetate (GLDA), methylglycine diacetate (MGDA), ethylenediaminetetraacetic acid (EDTA) and its salts, and diethylenetriaminepentamethylenephosphonate heptasodium (DTPMP·7Na).

[0015] Furthermore, the polyol is selected from one or more of glycerol, propylene glycol, sorbitol, and polyethylene glycol.

[0016] Furthermore, the pH adjuster is citric acid.

[0017] Furthermore, the additives are selected from one or more of defoamers, biological enzymes, enzyme stabilizers, preservatives, pigments, or fragrances.

[0018] Another object of the present invention is to provide a method for preparing the high-solids-content, stable pure liquid dishwashing pod composition, comprising the following steps: S1. Mix polyol, xanthan gum and water, stir until homogeneous, to obtain intermediate product 1; S2. The chelating agent, surfactant, defoamer and acrylic polymer are blended and homogenized until the material is uniform to obtain intermediate product 2. S3. Add intermediate product 1 to intermediate product 2, homogenize until the material is uniform, then add citric acid to adjust the pH to obtain intermediate product 3; mix intermediate product 3 with other components to obtain a liquid material. S4. The liquid material is packaged with an aqueous film to obtain a pure liquid dishwashing pod composition with stable high solid content.

[0019] Furthermore, in step S3, the pH is 6.5-7.5. In actual production, after homogenization and circulation processes, the material temperature will rise. After adjusting the pH, a cooling step is required (generally reduced to around 30°C) before adding other components such as biological enzymes. This can fully ensure the stability of the enzymes during production (reducing the inactivation rate of biological enzymes during production).

[0020] The present invention has the following beneficial effects: 1. Overcome the incompatibility problem under high solid content and high electrolyte conditions.

[0021] This invention provides a high-solids-content, stable, pure liquid dishwashing pod composition and its preparation method. In a high-concentration system with a solids content of 65-75%, xanthan gum is used as a three-dimensional network structure scaffold. Through a high-shear homogenization process, the xanthan gum molecular chains are fully extended, uniformly "locking" incompatible components such as nonionic surfactants, acrylic polymers, and high-concentration chelating agents within the gel network. Xanthan gum maintains excellent thickening and suspending abilities even in high-electrolyte environments (high concentrations of GLDA, sodium citrate, and DTPMP), a feat difficult to achieve with other thickeners (such as carbomer).

[0022] 2. Near-neutral pH ensures gentleness and protects tableware.

[0023] This invention controls the pH at 6.5-7.5. After washing the glazed ceramic plate 30 times, the appearance rating of the ceramic plate glaze was 1 (slight change): the gloss was slightly reduced; while the appearance rating of the ceramic plate glaze of commercially available alkaline products (pH>10) was 3 (severe change): the glaze was severely dulled and there was extensive corrosion.

[0024] 3. High solids content enables concentration.

[0025] With a solid content of 65-75% and high active ingredient content, each pod has strong washing power, conforming to the trends of concentration and green environmental protection, and reducing carbon emissions from packaging materials and transportation.

[0026] 4. Excellent reversible layering properties.

[0027] The composition of this invention allows for reversible stratification during long-term storage after sealing (approximately 45-60 days at room temperature). This stratification does not affect the sealing integrity of the water-soluble film, and can be restored to homogeneity by external pressure or dissolution in water before use, without loss of washing performance (detergency retention ≥98%). This characteristic eliminates the need to pursue absolute non-stratification, reducing the stringent requirements for long-term stability of the formulation.

[0028] 5. The irreplaceable nature of xanthan gum in high electrolyte environments.

[0029] The inventors unexpectedly discovered that xanthan gum maintains its complete three-dimensional network structure and does not undergo salting out or degradation even in the presence of high concentrations of electrolytes such as GLDA, sodium citrate, and DTPMP. This property makes xanthan gum an ideal thickener for high-solids-content dishwashing bean systems. Furthermore, not all microbial polysaccharide gums can achieve stability in demanding systems with high solids content, high concentrations of chelating agents, and high levels of nonionic surfactants. Comparative experiments showed that replacing xanthan gum with a suitable thickener caused the material to separate within 2 hours. Detailed Implementation

[0030] To more clearly illustrate the technical solution of the present invention, the following embodiments are provided. Unless otherwise stated, the raw materials, reactions, and post-processing methods appearing in the embodiments are all commercially available raw materials and technical methods well known to those skilled in the art.

[0031] The terms "preferred," "more preferably," and "more suitable" used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0032] It should be understood that, except in any operational instance or otherwise indicated, the amounts or all figures representing ingredients used, for example, in the specification and claims, should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise stated, the numerical parameters set forth in the following specification and appended claims are approximate values ​​varying according to the desired performance to be obtained according to the invention.

[0033] The present invention uses the following raw materials: Nonionic surfactant: Dehypon ® E127, Lutensol ® TO7; all purchased from BASF (China) Co., Ltd.

[0034] Xanthan gum: purchased from CP Kelco, brand name KELTROL®CG-T.

[0035] Chelating agents: Tetrasodium glutamate diacetate (GLDA-4NA), purchased from Shijiazhuang Jack Chemical Co., Ltd.; Heptasodium diethylenetriaminepentamethylenephosphonate (DTPMP•Na7), purchased from Shandong Taihe Technology Co., Ltd.

[0036] Defoamer: Dow XIAMETER TM AFE-0310 defoamer.

[0037] Enzyme preparations: food-grade liquid amylase and food-grade liquid protease; both purchased from Novozymes Enzyme Company.

[0038] Enzyme stabilizer: calcium chloride.

[0039] Hydrophobically modified acrylic copolymer: Acusol 588G.

[0040] The water-soluble membrane is a conventional commercial PVA membrane.

[0041] Examples 1-3 The composition and mass fraction of the high solids content stable pure liquid dishwashing pod compositions of Examples 1-3 are shown in Table 1.

[0042] Table 1. Components and mass fractions of Examples 1-3 The preparation method of the high-solids-content stable pure liquid dishwashing pod composition in Examples 1-3 includes the following steps: S1. Add glycerol to the pre-dissolving pot according to the above mass fraction, start stirring, and slowly add xanthan gum while stirring. After stirring until uniform, add some deionized water (4% of the composition mass fraction) and stir until uniform to obtain intermediate product 1. S2. Dissolve sodium citrate, calcium chloride, and citric acid separately in an appropriate amount of deionized water beforehand; while stirring, add propylene glycol, GLDA-4NA, DTPMP·Na7, sodium citrate, and Dehypon in sequence. ® E127, Lutensol ® TO7, Defoamer XIAMETER TM AFE-0310, calcium chloride, and Acusol 588G were mixed and homogenized until the material was homogeneous, yielding intermediate product 2. S3. Add intermediate product 1 to intermediate product 2, start homogenization and circulation until the material is uniform; then add citric acid to adjust the pH (the pH of the materials in Examples 1-3 is 6.97, 7.02 and 7.08 respectively), cool to 30°C to obtain intermediate product 3; mix intermediate product 3 with other components uniformly to obtain liquid material; S4. The liquid material is packaged with water-soluble PVA film to obtain a pure liquid dishwashing pod composition with high solid content and stable properties.

[0043] Comparative Example 1 The difference between this comparative example and Example 1 is that the xanthan gum is replaced with deionized water in equal mass; the other components and preparation methods are the same as in Example 1.

[0044] Comparative Example 2 The difference between this comparative example and Example 1 is that citric acid is replaced by sodium hydroxide by mass, and the pH of the material is adjusted to 10.5; the other components and preparation methods are the same as in Example 1.

[0045] Comparative Example 3 The difference between this comparative example and Example 1 is that the xanthan gum of equal mass is replaced with a fixed-quality gum; the other components and preparation methods are the same as in Example 1.

[0046] Comparative Example 4 Commercially available alkaline dishwashing pods: Wanban Natural Plant Extract Dishwashing Pods.

[0047] Test Example 1 Stability tests were conducted on the dishwashing pod compositions prepared in Examples 1-3 and Comparative Examples 1-3.

[0048] Test method: Short-term stability: The liquid materials prepared in Examples 1-3 and Comparative Examples 1-3 were bottled and sealed, and placed in environments of 0°C, room temperature, 40°C, and 45°C respectively. After being kept at a constant temperature for 7 days, the liquid materials were returned to room temperature to observe changes in their state. The evaluation criteria were that the liquid materials were homogeneous, with no significant changes in appearance, viscosity, pH, and solid content.

[0049] Stability of the pods after filling: The filled dishwashing pod composition was placed in environments of 0℃, room temperature, constant temperature and humidity (37℃ / 75%), 40℃, and 45℃ for 30 days. After being returned to room temperature, the appearance of the pods was observed to change. The evaluation criteria were that the pods had no leakage, no softness, and no stratification (reversible stratification was not considered a defect).

[0050] The test results are shown in Table 2. Table 2 Stability Test Results According to Table 2, the short-term stability of the liquid materials in Examples 1, 2, and 3 and the stability of the granules after filling within 30 days are all qualified. The materials in Comparative Examples 1 and 3 showed stratification within 2 hours of preparation, making it impossible to fill and seal. The viscosity of the material prepared in Comparative Example 2 increased sharply in a short period of time, and it was barely sealed and filled. Most of the granules had serious stringing and protruding edge problems. Some granules with normal sealing were selected for stability testing, and the granules showed serious gelation.

[0051] Test Example 2 The ceramic tableware glaze protection performance of the dishwashing pod compositions prepared in Example 1 and Comparative Example 2, and the commercially available alkaline dishwashing pod composition in Comparative Example 4, was tested.

[0052] Test method: Sample pretreatment: For each group of test samples, prepare 6 commercially available mainstream daily-use ceramic plates with a diameter of 20.5 cm and a feldspar glaze type. The plates are white and without patterns. Before testing, clean the samples with a neutral detergent, rinse them with deionized water, and let them air dry naturally. Then, equilibrate them for 24 h at (23±2)℃ and (50±5)% relative humidity. Before use, ensure that the glaze of each plate is intact. Number each ceramic plate and mark it with a "test area" (a circular area with a diameter of 15 cm in the center to avoid interference from edge wear). Do not apply any coating to the ceramic plates.

[0053] Cyclic washing test: Dishwashing pod compositions prepared in Example 1 and Comparative Example 2, as well as commercially available dishwashing pod compositions with pH > 10, were used to wash ceramic plates 30 times. Detergent dosage: 12 g; Washing device: Miele dishwasher; Model: Miele G7110CSC; Washing mode: Care wash mode (4 h); Washing water: tap water; Number of repetitions: 3; After completion, the dishes were removed and allowed to cool naturally to room temperature (25±2℃); After each cycle, the "wash → cool" steps were repeated, and the dishwasher drum was cleaned before each wash (to avoid residual detergent buildup).

[0054] Results and Evaluation: A five-person evaluation team was formed. After completing all washing cycles, the changes in the glaze appearance were evaluated visually using a comparison with an unused standard ceramic plate, according to the following levels: Grade 0 (No change): The glaze is intact, with no difference from the control sample, no loss of gloss, no corrosion spots, and no cracks; Level 1 (Slight Change): Gloss is slightly reduced, but there are no obvious corrosion spots or cracks; Level 2 (Significant Change): Gloss is significantly reduced, and localized corrosion spots or minor cracks are visible; Level 3 (Severe Changes): The glaze has severely lost its gloss or has been corroded over a large area, with obvious cracks or peeling.

[0055] The test results are shown in Table 3. Table 3 Test results of glaze protection performance of ceramic tableware According to Table 3, Example 1 provides significantly better protection for the glaze of ceramic tableware than Comparative Example 2 and commercially available alkaline dishwashing beads.

[0056] Test Example 3 The detergency performance of the pure liquid dishwashing pod compositions prepared in Examples 1-3 was tested.

[0057] Test method: (1) Preparation of additional load-bearing fouling: The components and amounts of additional load-bearing dirt are shown in Table 4: Table 4. Additional Fouling Load and Dosage The method for preparing additional loaded dirt includes the following steps: Mix the vegetable oil and eggs according to the above mass fractions and stir thoroughly; add tomato sauce and mustard, and continue stirring vigorously to obtain a mixture; melt the remaining fat, cool to 40°C, and then add it to the mixture and stir thoroughly; then add cream and milk, and stir thoroughly before adding the powdered solids and mixing all ingredients into a smooth paste; finally, package the prepared dirt into 50g portions and freeze for later use.

[0058] (2) Preparation of stains on plates: Table 5 shows the tableware, types of stains, and amount of stains applied.

[0059] Table 5. Reference Table for Tableware, Types of Stains, and Amount of Stains Preparation before staining: First, wash plates and glasses of the same size in a dishwasher with a 1 wt% citric acid solution, then wash with a commercially available regular detergent, rinse with distilled water until there are no water marks on the tableware, rinse until no water droplets remain, place in a drying oven to dry, and set aside after cooling.

[0060] Sludge preparation: The synthetic water used in the following experiments was: NaHCO3: 0.336 g / L; MgSO4·7H2O: 0.19 g / L; CaCl2·2H2O: 0.328 g / L.

[0061] Preparation of ferric sulfate solution: Weigh 5g Fe2(SO4)3 and add it to a 1 L beaker, then dilute to 1 L with distilled water.

[0062] Tea infusion: Mix 1L of synthetic water with 0.1 mL of ferric sulfate stock solution and boil. Pour the boiling water into a 1L beaker containing 15 g of tea leaves and let it steep for 5 minutes. Milk: Add 100 mL of milk to a glass beaker and heat in a microwave oven to 88±2℃. Allow the beaker to cool to 30-35℃. Carefully pour out the milk, leaving the milk skin. After pouring, the milk skin should adhere as a single piece to the glass wall. Then, dry the milk skin at 80℃ for 2 hours. Pasta: Take 40g of pasta, cut them in half lengthwise, and put them into boiling water; boil for 8 minutes (stop and observe). After boiling, drain through a wire mesh and cool to room temperature. Put the cooked pasta and 100mL of deionized water into a blender and blend until smooth; Mixed starch: Weigh 8.125 g of each of the four types of starch (total weight 32.5 g), pour them into a small glass beaker, stir and disperse them thoroughly beforehand, then pour them into a 2 L glass beaker, add 967.5 g of boiled synthetic water, and stir thoroughly with a stirrer for 30 min. The stirring speed should not be too fast to avoid bubbles in the starch suspension. Egg yolk: Separate the egg white and egg yolk, take the egg yolk, and stir it with a glass rod until it is smooth and ready to use; Minced meat: Remove obvious fat from pork and beef. Put 50 wt% pork and 50 wt% beef into a grinder and grind them into minced meat. Store in the freezer. Weigh out 225 g of the thawed minced meat (50 wt% pork and 50 wt% beef) and 75 g of egg (pre-beaten well). Add 80 g of synthetic water and mix thoroughly with an electric mixer.

[0063] (3) Staining: Tea stains: Fill a clean cup with 100 mL of tea, bake in an 80℃ oven for 1 hour, discard the remaining tea, and then dry in the oven for later use.

[0064] Milk: Add 100 mL of milk to a glass beaker and heat in a microwave to 88±2℃. Allow the beaker to cool to 30-35℃. Carefully pour out the milk, leaving the milk skin. The milk skin should adhere as a single piece to the glass wall. Then, dry the milk skin at 80℃ for 2 hours and allow it to cool before use. Pasta: Using a short silicone brush, spread 3.0 ± 0.1 g of pasta onto a plate, leaving a 2 cm gap around the edge. Dry the plate at 120°C for 2 hours, then let it cool before use. Mixed starch: Weigh 10±0.1 g of mixed starch into a glass dish, and gently rotate the glass dish to form a starch film evenly on the inner surface of the glass dish. Then place it in an 80℃ oven to dry for 4 hours and cool for later use. Egg yolk stain: Using a pigskin paint brush, evenly apply the yolk to the smooth side of each stainless steel sheet, leaving a 10mm margin unpainted. After applying the yolk, place the sheet in an 80℃ constant temperature drying oven and bake for 1 hour. Remove and allow to cool before use. Minced meat: Use a pig bristle brush to evenly spread 2 g of minced meat mixture onto the plate, leaving a 1 cm uncontaminated edge on each plate; then place the plate in a 130℃ oven to dry for 30 min, and let it cool before use; Washing test: The pure liquid dishwashing beads prepared in Examples 1-3 were used to wash the stained plates. Washing instrument: Miele dishwasher; model: Miele G7110CSC; washing mode: eco-friendly wash mode (4 h); washing water: tap water; number of washes: 1; the experiment was repeated 3 times.

[0065] (4) Results and evaluation.

[0066] Scoring and evaluation were conducted based on the washing results of each batch of washes. Plates coated with pasta and mixed starch were soaked in iodine solution after washing; plates with minced meat were soaked in 1 wt% red color developer after washing, rinsed once with tap water, and set aside. Once all plates had developed color, visual scoring and comparison were carried out.

[0067] Six different stains were visually scored on six pieces of tableware, with scores ranging from 0 to 10, where 10 was the best and decreasing downwards, with 0 being the worst. Five people scored the tableware, and the average score for each stain was taken from the six pieces of tableware. The scores for each stain were added together, with a maximum score of 60. The final result was the average of the scores from the three tests. A difference of 2 points in the final scores was considered to indicate that the stain removal performance was equivalent.

[0068] The results of the stain removal performance test are shown in Table 6.

[0069] Table 6. Results of Decontamination Performance Tests According to the test results in Table 6, there was no significant difference in the stain removal effect between Examples 1-3.

[0070] Test Example 4 The gloss effect of the pure liquid dishwashing pod compositions prepared in Examples 1-3 was tested.

[0071] Test method: Sample pretreatment: Prepare 6 identical glass cups for each group of test samples. Before testing, soak them in 6 wt% citric acid solution for 30 min and rinse them with deionized water until the water does not run down the cup wall in streams or condense into droplets, and there is no film or spots visible.

[0072] Stain preparation: The method and amount of stain preparation are the same as those for the additional load stain in Test Example 3. Add 50g of the stain together with the detergent for each test.

[0073] Circular washing test: The dishwashing pod compositions prepared in Examples 1-3 were used to wash the glass 15 times. 50 g of detergent was added to each wash to remove stains. Detergent dosage: 12 g. Washing device: Miele dishwasher; Model: Miele G7110CSC; Washing mode: Energy-saving wash mode (4 h); Washing water: 250 PPM synthetic hard water. After 15 cycles of washing, the tableware was removed and allowed to cool naturally to room temperature (25±2℃). After washing, the glass was inverted and illuminated with a flashlight to observe the scale deposition and visually score the results. The score ranged from 0 to 10, with 10 being the best and decreasing downwards, and 0 being the worst. Ten people scored the samples, and the final result for each sample was the average.

[0074] The test results are shown in Table 7.

[0075] Table 7. Results of Gloss Effect Test According to the test results in Table 7, the difference in gloss effect between Examples 1-3 is not significant.

[0076] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pure liquid-type dishwashing pod composition with stable high solids content, characterized in that, The high-solids-content stable pure liquid dishwashing pod composition comprises an aqueous membrane and a liquid material encapsulated within the aqueous membrane. The liquid material comprises the following components by mass fraction: Nonionic surfactants 15-35% Acrylic polymers 2-8% Chelating agent 20-50% Xanthan gum 0.1-1% pH adjuster 1-5% Additives 0.1-10% Polyols 8-25% Water content: 18-40%.

2. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The nonionic surfactant is a fatty alcohol polyoxyethylene ether.

3. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The acrylic polymer is a hydrophobically modified acrylic copolymer.

4. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The chelating agent is selected from one or more of sodium citrate, sodium glutamate diacetate, methylglycine diacetate, ethylenediaminetetraacetic acid and its salts, and sodium diethylenetriaminepentamethylenephosphonate.

5. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The polyol is selected from one or more of glycerol, propylene glycol, sorbitol, and polyethylene glycol.

6. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The pH adjuster is citric acid.

7. The high-solids-content stable pure liquid dishwashing pod composition according to claim 1, characterized in that, The additives are selected from one or more of the following: defoamers, biological enzymes, enzyme stabilizers, preservatives, pigments, or fragrances.

8. A method for preparing the high-solids-content stable pure liquid dishwashing pod composition according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Mix polyol, xanthan gum and water, stir until homogeneous, to obtain intermediate product 1; S2. The chelating agent, surfactant, defoamer and acrylic polymer are blended and homogenized until the material is uniform to obtain intermediate product 2. S3. Add intermediate product 1 to intermediate product 2, homogenize until the material is uniform, then add citric acid to adjust the pH to obtain intermediate product 3; mix intermediate product 3 with other components to obtain a liquid material. S4. The liquid material is packaged with an aqueous film to obtain a pure liquid dishwashing pod composition with stable high solid content.

9. The method for preparing the high-solids-content stable pure liquid dishwashing pod composition according to claim 8, characterized in that, In step S3, the pH is 6.5-7.5.

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