A dual-phase anti-segregation neutral multipurpose cleaning effervescent tablet with equal particle size and its low-temperature preparation process

Abstract

The application discloses a kind of equal-particle-size two-phase anti-segregation neutral multipurpose cleaning effervescent tablets and low-temperature preparation process thereof, belongs to general cleaning effervescent material field.The acid and alkali materials are independently wet granulated, the particles are uniformly sieved to 40 mesh, two-phase internal addition uniform bubble anti-segregation dispersant, additive amount control is 2.0%-2.8%;Production stage adopts differentiation control humidity in different workshops, 40-45 ℃ low-temperature drying process, particle moisture≤1%;Two sets of traceless marking schemes are configured, pH indicator, ultramicro pigment, to distinguish between acid and alkali materials, no dyeing residue in water;Basic anti-freezing effect can be achieved by adding anti-freezing powder to alkaline particles at-20 ℃, the pH of aqueous solution after dissolving finished product is stable at 7.0-7.6, neutral and non-corrosive, suitable for metal, rubber, plastic, glass and other types of substrates, can be used in home, automobile, industrial and other scenes cleaning, especially as low-temperature anti-freezing windshield washer fluid raw material.External anti-freezing synergistic liquid can greatly expand the low-temperature use range, the application solves the industry pain points such as storage and transportation segregation, tablet gas expansion, substrate dyeing and corrosion, the product batch stability is strong, can realize split secret subcontracting production, has very high industrial application value.

Description

Technical Field

[0001] This invention belongs to the field of general cleaning effervescent materials technology, specifically involving a biphase anti-stratification neutral multipurpose cleaning effervescent tablet with equal particle size and its low-temperature preparation process. The product can be adapted to various application scenarios such as household cleaning, industrial parts cleaning, and automotive glass maintenance. Background Technology

[0002] Most existing effervescent tablets for cleaning use a unified granulation method that blends acid and alkali powders. However, this method has several unresolved defects during actual storage, transportation, and use: First, the acid and alkali materials are in long-term contact with each other, and a slow chemical reaction will occur during storage and transportation. This makes the tablets prone to moisture absorption and gas expansion, resulting in a short shelf life. Second, powders of different densities are prone to stratification after long-distance transportation and bumpy rides. The acid-base ratio inside a single effervescent tablet fluctuates greatly, resulting in poor cleaning performance stability. Currently, the dispersants in conventional effervescent products on the market are added through external mixing, which can only improve the foam state but cannot balance the density difference of acid and alkali particles, and cannot solve the problem of transport stratification at its root. Third, colored pigments are added during the production stage to distinguish acid and alkali materials. After dissolving, the pigments can easily form staining residues on the surface of various substrates. Without adding pigments, there is a risk of mixing during production. Fourth, after the effervescent solution is dissolved, the foam is easy to float and settle, and water stains are easily left on glass and hard surfaces after cleaning. Fifth, the acid-base imbalance of existing effervescent tablet aqueous solutions can corrode various substrates such as metal, rubber, and plastic with long-term use, especially damaging wiper blades, car paint, and aluminum alloy wheels in automotive scenarios. Sixth, conventional production processes do not have differentiated humidity control solutions, making it impossible to achieve confidential contract manufacturing of acid and alkali materials separately. There is a lack of stable and mature technologies for antifreeze cleaning effervescent tablets suitable for northern winters and low-temperature glass cleaner effervescent tablets for automobiles, which can be mass-produced.

[0003] Currently, there is no existing technology that pre-embeds dispersants inside acid and alkali particles and achieves anti-stratification during storage and transportation by matching particles of equal size. The industry lacks an integrated technology that can distinguish production materials, prevent stratification during storage and transportation, ensure strong product storage stability, prevent corrosion of multiple substrates, cover all scenarios of household, industrial and automotive use, and achieve low-temperature antifreeze function. Summary of the Invention

[0004] Purpose of the invention The purpose of this invention is to overcome the defects of the existing technology and provide a neutral multi-purpose cleaning effervescent tablet with equal particle size and anti-stratification properties, as well as its low-temperature preparation process. This results in products that do not stratify during transportation, do not bloat during long-term storage, allow for visual differentiation of acid and alkali materials during the production stage, leave no staining residue when immersed in water, and do not corrode or damage various substrates such as metals, plastics, rubber, and glass. It also supports independent and confidential contract manufacturing in separate workshops and can be adapted to various scenarios such as home kitchen and bathroom cleaning, industrial workpiece cleaning, and automotive glass maintenance. It can also be used as a raw material for antifreeze glass cleaner in low-temperature environments. Technical solution A biphase, anti-stratification, neutral, multi-purpose effervescent tablet with uniform particle size comprises independently formed acidic and alkaline granules. Both types of granules are uniformly sieved to 40 mesh, ensuring consistent particle settling rates and eliminating powder stratification during transportation. A foaming and anti-stratification dispersant is separately added to each acidic and alkaline granule, with the dispersant accounting for 2.0%-2.8% of the total granule mass. The two phases are granulated separately using a wet granulation process. Differentiated humidity control is employed in the production workshop: the humidity in the acidic phase workshop is ≤55%, and the humidity in the alkaline phase workshop is ≤45%. The materials are dried with low-temperature hot air at 40-45℃, controlling the granule moisture content to below 1% to prevent premature reaction between acid and alkaline materials. The dried granules are then mixed at a low speed in three dimensions to ensure structural integrity and prevent breakage before tableting. The resulting effervescent tablets, when dissolved, have a stable pH in the range of 7.0-7.6, exhibiting neutrality and making them suitable for use on various rigid substrates.

[0005] The foam-dispersing and anti-stratification dispersant is a water-soluble neutral powder additive with dual functions of powder dispersion and foam suppression. It can be prepared by compounding commonly used dispersing raw materials in the field, such as polyethers and alkyl glycosides, and the additive is loaded onto an inorganic carrier. This dispersant can adjust the bulk density of acidic and alkaline particles, keeping the settling rate of the two types of particles consistent. Combined with a uniform 40-mesh particle size, it significantly reduces component stratification caused by transportation bumps, and the deviation of effective components can be controlled within 3%. At the same time, it can refine the bubbles generated by effervescence, avoid excessive foam overflow, and reduce water stains on hard surfaces. The additive is loaded onto an inorganic carrier and will not migrate or precipitate during storage, delaying premature reaction of acidic and alkaline materials and improving the shelf life of the product. Existing industry dispersants are all added externally by mixing with the powder, which can only improve the foam state and cannot balance the density of acidic and alkaline particles. This invention embeds the dispersant inside the acidic and alkaline particles to achieve density matching inside the particles.

[0006] This invention further incorporates a dual-mode traceless labeling system: first, a pH-responsive indicator that displays color in acid-base particles when the material is dry, and the color automatically disappears after a neutralization reaction; second, an ultra-low dosage food coloring that leaves no visible color after immersion in water, balancing the need for material differentiation in production with the effect of no staining in use. The alkaline particles can be additionally supplemented with functional components such as supported alcohol antifreeze powder, palm wax micron powder, slow-release sodium percarbonate, metal corrosion inhibitors, and antibacterial agents. The alcohol antifreeze powder includes one or more of propylene glycol, ethylene glycol, and sorbitol. The acidic particles simultaneously adjust the organic acid ratio to offset pH shifts, ensuring the final aqueous solution pH remains stable within the 7.0-7.6 range. The raw material system, combined with organic acids, chelating agents, surfactants, carbonates, and bicarbonates, can cover cleaning needs in various scenarios, including home and bathroom applications, automotive applications, and industrial metal workpieces. This invention also discloses a supporting low-temperature fractional preparation process, which involves six steps: ingredient preparation, wet granulation in separate workshops, low-temperature drying, particle sieving, low-speed mixing, and tableting.

[0007] This product, when used alone, has a freezing point of -20℃ and can be used as a base ingredient for automotive windshield washer fluid. When used in conjunction with an external high-concentration antifreeze enhancer, it can meet the antifreeze requirements of extremely cold environments from -30℃ to -45℃. The antifreeze enhancer is a separate external product and is not included in the main formulation of the effervescent tablets, and is not within the scope of protection of the claims of this invention. Beneficial effects 1. Adopting a dual anti-delamination structure with equal particle size matching and pre-embedded dispersant inside the particles, the deviation of effective ingredients after long-distance transportation is ≤3%, and the performance consistency of each effervescent tablet is greatly improved. 2. The acid and alkali particles are physically isolated throughout the process, and with the low moisture and low temperature drying process, the product will not absorb moisture or bloat after 12 months of open storage, and its storage stability is significantly better than existing products. 3. Adopting a dual-mode traceless coloring solution, acid and alkali particles can be clearly distinguished during the production stage, and no dyeing residue will appear after the product is used in water, solving the long-standing dyeing pain point in the industry. 4. After dissolving, the effervescent tablets form a neutral buffer solution that does not corrode or cause aging damage to various substrates such as metal, rubber, plastic, and glass. In automotive applications, it will not damage wiper blades, paint, or wheel rims. 5. Differentiated humidity control production processes in different workshops enable in-house production of acid phase materials and outsourcing of basic phase materials, while maintaining strong formula confidentiality; 6. Low-temperature drying and low-moisture production process delays the pre-reaction of acidic and alkaline materials, effectively extending the product shelf life; 7. Applicable scenarios cover all fields including home, industry, and automobile. The basic effervescent tablets can achieve freezing point protection of -20℃, and the external antifreeze enhancer can be extended to ultra-low freezing point, suitable for low-temperature use scenarios in all regions of the country. Detailed Implementation The total weight of a single effervescent tablet of this invention is 4.5g, and the ratio of acidic granules to alkaline granules can be flexibly adjusted according to the actual use scenario and cleaning needs.

[0008] The acidic granular raw material contains a compound of organic acids, a foaming and anti-stratification dispersant, a nonionic surfactant, an anti-crystallization aid, a pH indicator, and a binder; the humidity in the acid phase production workshop is controlled at ≤55%, the material is dried at a low temperature of 42℃, the moisture content of the finished granules is 0.8%, and the granules are screened to a standard particle size of 40 mesh.

[0009] The alkaline granule raw materials include carbonate compound alkali agent, foaming and anti-stratification dispersant, antifreeze powder, pH buffer, metal corrosion inhibitor, and coating wax powder; the humidity of the alkaline production workshop is controlled at ≤45%, the material is dried at a low temperature of 42℃, the moisture content of the finished granules is 0.8%, and the standard particle size is sieved to 40 mesh.

[0010] Example 1: General-purpose multi-scenario cleaning effervescent tablets, prepared according to the above basic formula, are made by mixing acid and alkali granules and compressing them into tablets, with each tablet weighing 4.5g. They can be used by diluting 2L of water and can be used for routine cleaning of household glass and kitchen and bathroom fixtures.

[0011] Example 2: Effervescent tablets for automotive glass cleaning, with an additional shellac decomposition aid added inside the acidic granules, while keeping other process parameters unchanged, can effectively remove shellac and resin stains from the glass surface, suitable for automotive glass cleaning.

[0012] Example 3: Coating and maintenance effervescent tablets, with carnauba wax micro powder added to alkaline particles, and other production parameters remaining unchanged, can form a hydrophobic protective film after cleaning hard surfaces and car paint.

[0013] Example 4: Antibacterial and deodorizing effervescent tablets, which replace part of the sodium bicarbonate in the alkaline granules with slow-release sodium percarbonate, and are combined with microcapsule fragrances, can achieve antibacterial and odor removal in kitchens, bathrooms, and car interiors.

[0014] Example 5: Low-temperature antifreeze cleaning effervescent tablets, with alkaline granules and loaded alcohol antifreeze powder, the amount of organic acid added is adjusted in the acid phase, and the remaining production parameters remain the same. The finished effervescent tablets can reach a freezing point of -20℃ when used alone, and can be used as raw material for automotive windshield washer fluid to meet the needs of outdoor glass and equipment cleaning and antifreeze in northern winters. Comparative test Three sets of parallel samples were set up for performance testing: Comparative Example 1 was a commercially available effervescent tablet prepared by traditional acid-base blending and granulation; Comparative Example 2 was a common phase-separated granular effervescent tablet with inconsistent particle size and external addition of dispersant; and the sample prepared in the embodiment of the present invention.

[0015] The test results are as follows: After transportation and bumps, the effective ingredient deviation was 12%-18% in Comparative Example 1, 7%-10% in Comparative Example 2, and ≤3% in the sample of this invention. In the 12-month open storage test, Comparative Example 1 showed moisture absorption after 3 months and performance failure after 6 months, while Comparative Example 2 showed slight moisture absorption after 6 months. The sample of this invention maintained stable performance throughout the entire process. In the dissolved water staining test, Comparative Example 1 showed obvious colored residue, while Comparative Example 2 showed slight light-colored traces. The sample of this invention showed completely transparent water after dissolution. In the 72-hour multi-substrate immersion test, Comparative Example 1 showed rubber hardening and paint loss of gloss, while Comparative Example 2 showed watermarks on hard surfaces. The sample of this invention showed no corrosion or aging. Existing commercial effervescent products generally experience effective ingredient fluctuations of over 7% after long-distance transportation. The product of this invention has achieved unexpected technical effects in multiple indicators, including foam residue, substrate corrosion, and low-temperature stability. This improvement is not a technical solution that a person skilled in the art could conceive of without creative effort.

Claims

1. A biphase, anti-stratification, neutral, multi-purpose effervescent cleaning tablet with uniform particle size, characterized in that... The product comprises independently formed acidic and alkaline granules; the sieved particle size of both acidic and alkaline granules is uniformly 40 mesh; a uniform foaming and anti-stratification dispersant is independently mixed into the interior of both acidic and alkaline granules, with the dispersant accounting for 2.0%-2.8% of the total mass of each granule; acidic and alkaline granules are independently wet-granulated, with differentiated humidity control in different workshops during production, the relative humidity of the acid phase production environment being ≤55%, and the relative humidity of the alkaline phase production environment being ≤45%; the granules are dried with low-temperature hot air at 40-45℃, with a granule moisture content ≤1%; the settling rates of the acidic and alkaline granules are basically the same, and the two types of granules are mixed at a low speed in three dimensions, maintaining the integrity of the granule structure without damage during the mixing process, and then pressed into effervescent tablets; after dissolving, the pH of the aqueous solution of the effervescent tablets is stable at 7.0-7.6, enabling cleaning and maintenance of various hard substrates such as metal, plastic, rubber, and glass.

2. The equal particle size biphase anti-stratification neutral multi-purpose cleaning effervescent tablet according to claim 1, characterized in that, The acidic and alkaline particles are respectively equipped with material identification components, which include two optional implementation methods: one is a pH-responsive indicator, in which the acid and alkaline particles show color when the material is dry, and the color fades automatically after the acid and alkali undergo a neutralization reaction; the other is an ultra-trace amount of food-grade water-soluble pigment, the amount added is lower than the color development threshold that can be observed by the naked eye in the water.

3. The equal particle size biphase anti-stratification neutral multi-purpose cleaning effervescent tablet according to claim 1, characterized in that, The acidic particles contain organic acids, nonionic surfactants, and anti-crystallization agents; the alkaline particles contain carbonate alkaline raw materials, and the alkaline particles may also selectively contain at least one of antifreeze powder, metal corrosion inhibitors, coating wax powder, and antibacterial agents; the antifreeze powder is a supported alcohol antifreeze powder, and the alcohol antifreeze powder includes any one or more of propylene glycol, ethylene glycol, and sorbitol.

4. The equal particle size biphase anti-stratification neutral multi-purpose cleaning effervescent tablet according to claim 1, characterized in that, The effervescent tablets can be used for cleaning various scenarios, including household glass, kitchen and bathroom fixtures, industrial metal parts, plastic products, and automotive components. When used as a raw material for automotive low-temperature antifreeze windshield washer fluid, the effervescent tablets have a basic freezing point of -20°C. When used with an external antifreeze enhancer, they can achieve antifreeze use in extremely cold environments of -30°C to -45°C. The external antifreeze enhancer is a complementary external product independent of the effervescent tablets and is not within the scope of protection defined by the claims of this invention.

5. The preparation process of a biphase anti-stratification neutral multipurpose cleaning effervescent tablet with uniform particle size according to claim 1, characterized in that, Includes the following steps: S1. Prepare acidic powder and alkaline powder respectively, and add foaming and anti-stratification dispersant and corresponding material identification components to the two types of powder respectively; S2, acidic powder, and alkaline powder are wet granulated in separate workshops with corresponding humidity control. S3. Place the granulated particles in a hot air environment at 40-45℃ for low-temperature drying, and sieve to obtain 40-mesh standard particles, controlling the particle moisture content to ≤1%; S4. Use a low-speed three-dimensional mixing device to mix the dried granules to avoid granule breakage; S5. Compress the mixed granules into tablets to obtain the finished cleaning effervescent tablets.