A high density, slow release gel toilet bowl foam shield composition and method of making same
By preparing a high-density gel-type toilet foam shield composition, the problems of easy dilution, poor foaming persistence, and inability to settle stably in liquid foam shields were solved, achieving efficient foaming and long-term stability, and improving cleaning effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 靖江星火创新科技中心(个人独资)
- Filing Date
- 2026-02-25
- Publication Date
- 2026-06-12
AI Technical Summary
Existing liquid toilet foam shields have low density, are easily dispersed by water flow, have rapid dilution of active ingredients, limited foaming times, and poor storage stability.
The composition of the toilet foam shield is made by forming a coordination network with polyvalent metal ions and chelating agents, forming a three-dimensional network structure with water-soluble polymers, or forming a gel network by cross-linking pH-responsive polymers under alkaline conditions. This ensures that the composition density is greater than 1.05 g/cm³ and that it is stably submerged in the water seal liquid, thereby controlling the surfactant release rate.
It achieves stable settling of gel-type foam shields, long-lasting foaming, and increases the number of foaming times to more than 5 times that of traditional products. The system is uniform and stable, does not separate during long-term storage, and significantly improves cleaning effect.
Smart Images
Figure CN122188744A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of household cleaning technology, specifically to a high-density slow-release gel toilet foam shield composition and its preparation method, particularly a gel toilet foam shield composition with high density, stable sinking to the bottom of water, resistance to water dilution and long-lasting foaming, and various preparation methods thereof. Background Technology
[0002] Existing smart toilet foam shields mostly use liquid foaming agents, which generally have the following defects: (1) low density (usually <1.02 g / cm³), cannot sink effectively, and are easily dispersed by water flow; (2) fast water solubility, rapid dilution of active ingredients, resulting in limited effective foaming times after a single addition (usually less than 500 times / liter); (3) the system is prone to phase separation and has poor storage stability. Therefore, the market urgently needs a product that can remain stable below the toilet water seal surface for a long time, slowly release active ingredients, and maintain an ultra-high foaming capacity. Summary of the Invention
[0003] The technical problem this invention aims to solve is overcoming the shortcomings of existing liquid foam shields, such as easy dilution, poor foaming persistence, and inability to stably sink. The technical solution of this invention is to provide a gel-type toilet foam shield composition, characterized in that the composition has a density greater than 1.05 g / cm³ at 25°C and has a gel-like morphology. This gel morphology enables the composition to stably sink below the toilet bowl's water seal surface and controls the release rate of the surfactant, resulting in an effective foaming cycle of more than 3000 times (preferably more than 2500 times) at 500lm. To achieve the above-mentioned gel morphology, this invention provides three parallel technical paths: Coordination bond crosslinking pathway: Through the formation of a coordination bond network by multivalent metal ions and chelating agents; Physical thickening pathway: Formation of a three-dimensional network structure through water-soluble polymers; pH-responsive gel pathway: A gel network is formed by in-situ crosslinking of pH-responsive polymers under alkaline conditions.
[0004] The beneficial effects of the present invention are: (1) forming a stable gel that resists water flow impact and sinks to the bottom for a long time; (2) controlling the slow release of active ingredients through the gel network, and improving the foaming efficiency to more than 5 times that of traditional products; (3) the system is uniform and stable and does not separate during long-term storage; (4) the foam is rich and delicate, and has excellent anti-splash and cleaning effects. Attached Figure Description
[0005] Figure 1 This is a general preparation process flow diagram of the gel-type toilet foam shield composition of the present invention, showing the common steps and branch selection of three paths. Figure 2 shows the usage scenario and effect of the gel-type toilet foam shield composition of the present invention. After the smart toilet with foam shield function uses this product to foam, a layer of foam is formed on the toilet water surface, which has the functions of splash prevention, odor prevention, antibacterial, wall moisturizing, fragrance and stain removal. Detailed Implementation
[0006] Example 1: Coordination Bond Crosslinking Path (Sodium Chloride + Disodium EDTA System) The formulation, by weight percentage, is as follows: Sodium lauryl ether sulfate (SLES, 70%) 25%, APG alkyl glycoside 4%, xanthan gum 1.2%, coconut oil fatty acid diethanolamide (6501) 8%, fatty alcohol polyoxyethylene ether sulfate (AES) 10%, sodium chloride 4.5%, disodium EDTA 0.5%, sodium benzoate 0.1%, Kathon 0.05%, pigment 0.1%, fragrance 1%, deionized water to 100%. The core of this pathway lies in the fact that disodium EDTA, as a chelating agent, synergistically interacts with sodium ions in sodium chloride to form a stable coordination bond network with the amide groups in 6501. This coordination network endows the composition with excellent gel strength and dilution resistance. Preparation method: Xanthan gum is dispersed in a portion of deionized water to form colloid A; SLES, APG, 6501, AES, and disodium EDTA are mixed in the remaining water to obtain solution B; sodium chloride aqueous solution is slowly added to solution B to induce coordination bond crosslinking to form pregel C; colloid A and pregel C are mixed, homogenized, and then preservatives, fragrances, and pigments are added.
[0007] Example 2: Physical Thickening Path (HEC + Glycerin) The formulation, by weight percentage, is as follows: Sodium lauryl ether sulfate (SLES, 70%) 28%, hydroxyethyl cellulose (HEC) 0.6%, coconut oil fatty acid diethanolamide (6501) 6%, anhydrous glycerin 18%, disodium EDTA 0.3%, sodium benzoate 0.1%, Kathon 0.05%, pigment 0.1%, fragrance 0.5%, and deionized water to 100%. Preparation method: Slowly add HEC to most of the deionized water, stirring at high speed until completely dissolved to form a transparent colloid. In another container, mix SLES, 6501, glycerin, and disodium EDTA, stirring until homogeneous. Slowly add the latter mixture to the HEC colloid, stirring at low speed until homogenized, and finally add the remaining additives.
[0008] Example 3: pH-responsive gel pathway (carbomer + neutralizing agent) The formulation by weight percentage is as follows: APG alkyl glycoside (50%) 20%, cocamidopropyl betaine (CAB) 10%, coconut oil fatty acid diethanolamide (6501) 4%, anhydrous glycerol 20%, carbomer (U20) 0.4%, triethanolamine (to adjust pH to 6.5-7.0) suffice, disodium EDTA 0.2%, sodium benzoate 0.1%, Kathon 0.05%, pigment 0.1%, fragrance 0.8%, and deionized water to 100%. Preparation method: Slowly sprinkle carbomer into most of the deionized water, stir to disperse, and let stand for 30 minutes to hydrate. In another container, mix APG, CAB, 6501, glycerol, and disodium EDTA, and stir until homogeneous. Slowly add the surfactant mixture to the carbomer dispersion and gently stir until homogeneous. Finally, triethanolamine is slowly added dropwise while the pH is measured. When the pH reaches 6.5-7.0, a transparent gel is formed in the system, and the remaining additives are added.
[0009] Performance Testing: In a simulated toilet usage environment, Example 1 product foamed >3000 times, Example 2 >2800 times, and Example 3 >2600 times; all three had a density >1.08 g / cm³, allowing them to settle stably; and no phase separation occurred after 90 days of storage at 40℃. The comparative example (traditional liquid formula) foamed <500 times, failed to settle, and gradually lost its effectiveness with increasing use due to dilution with water.
Claims
1. A high-density slow-release gel toilet foam shield composition and its preparation method, characterized in that, The composition has a density greater than 1.05 g / cm³ at 25°C and has a gel-like morphology; the gel-like morphology is used to enable the composition to stably sink below the surface of the toilet water seal liquid and to control the release rate of the surfactant therein, so that the effective foaming times of 500lm are greater than 3000 times.
2. The composition according to claim 1, characterized in that, The gel morphology is formed in any of the following ways: a) a coordination cross-linked network, which is formed by the coordination of polyvalent metal ions and chelating agents; b) a physical thickening network, which is formed by a three-dimensional network structure of water-soluble polymers; c) a pH-responsive gel network, which is formed by in-situ cross-linking of pH-responsive polymers under alkaline conditions.
3. The composition according to claim 2, characterized in that, When the gel morphology is a coordination bond crosslinked network, the composition comprises anionic surfactant, fatty acid alkanolamide, polyvalent metal salt, chelating agent and water; the chelating agent is used to stabilize the coordination bond network.
4. The composition according to claim 3, characterized in that, The polyvalent metal salt is sodium chloride, the fatty acid alkanolamide is coconut oil fatty acid diethanolamide, and the chelating agent is disodium EDTA; by weight percentage, the content of sodium chloride is 3-6%, the content of coconut oil fatty acid diethanolamide is 5-10%, and the content of disodium EDTA is 0.1-1.0%.
5. The composition according to claim 2, characterized in that, When the gel morphology is a physically thickened network, the composition comprises an anionic surfactant, a water-soluble polymer, a weighting solvent with a density greater than 1.20 g / cm³, and water; the weighting solvent is used to adjust the density, and the water-soluble polymer forms the physically thickened network.
6. The composition according to claim 5, characterized in that, The water-soluble polymer is selected from at least one of hydroxyethyl cellulose, xanthan gum, and gellan gum; the weight-adding solvent is glycerol; the content of the water-soluble polymer is 0.3-1.5% by weight, and the content of glycerol is 10-30%.
7. The composition according to claim 2, characterized in that, When the gel morphology is a pH-responsive gel network, the composition comprises a nonionic surfactant and / or an amphoteric surfactant, an acrylic cross-linked polymer, an alkaline neutralizer, and water; the alkaline neutralizer is used to adjust the pH of the system to 5.5-7.5, causing the acrylic cross-linked polymer to swell and form the gel network.
8. The composition according to claim 7, characterized in that, The acrylic cross-linked polymer is carbomer, and the alkaline neutralizing agent is triethanolamine, sodium hydroxide, or arginine; the content of the acrylic cross-linked polymer is 0.2-0.8% by weight, and the content of the anionic surfactant in the composition is not higher than 15%.
9. The composition according to any one of claims 1-8, characterized in that, The composition does not undergo macroscopic phase separation when left to stand at 40°C for 90 days.
10. A method for preparing a high-density sustained-release gel toilet foam shield composition as described in any one of claims 1-9, characterized in that, The method includes a gel network construction step, which is selected from any one of the following three methods: a) Coordination bond crosslinking network construction: adding an aqueous solution of a multivalent metal salt to a mixture containing an amide surfactant and a chelating agent, and stirring to induce coordination bond crosslinking; b) Construction of a physical thickening network: A water-soluble polymer is fully dispersed in water to form a homogeneous colloid, and then a surfactant and a weighting solvent are added; c) Construction of a pH-responsive gel network: An acrylic crosslinked polymer is dispersed in water, fully hydrated, a surfactant mixture is added, and finally an alkaline neutralizer is added to adjust the pH to gel formation.