Cleaning brick and preparation method thereof

Abstract

The invention provides a cleaning brick. The cleaning brick is prepared from the following components in parts by mass: 50 to 80 parts of an alkoxy-containing nonionic surfactant, 10 to 30 parts of a zwitterionic surfactant, 1 to 5 parts of modified silicon dioxide, 0.1 to 5 parts of enzyme, 1 to 5 parts of an acid-base aid, 0.1 to 5 parts of essence, 50 to 100 parts of water-soluble glue and 10 to 50 parts of a packing material. Hydrophilic and lipophilic groups are introduced into the modified silicon dioxide, so that the compatibility of the modified silicon dioxide with other components is enhanced; meanwhile, polyvinyl alcohol is subjected to epoxy chloropropane modification to obtain modified polyvinyl alcohol introduced with ether groups, and the water resistance of the modified polyvinyl alcohol is enhanced while the viscosity of the modified polyvinyl alcohol is retained. Due to multiple active groups, the components can be mutually wound and connected through molecular acting force to form a compact and stable cross-linked structure, and the stability of the system is enhanced, so that the active components are uniformly and slowly released, the service time of the cleaning brick is prolonged, and the cleaning effect is improved.

Description

Technical Field

[0001] The invention relates to the field of household hygiene, in particular to a cleaning brick and a preparation method thereof. Background Art

[0002] With the accelerated pace of modern life, household cleaning has become an indispensable part of daily life. Among the many cleaning tasks, laundry, toilet cleaning and floor cleaning are particularly common and necessary. These cleaning tasks are not only related to the hygiene and comfort of the living environment, but also directly affect people's health and quality of life. However, existing cleaning products are mostly in liquid or powder form. Although they are widely used in the market, they have many inconveniences and limitations in practical applications, especially in the cleaning process of special occasions such as toilets.

[0003] Liquid or powdered detergents need to be added manually when used, which is particularly cumbersome when cleaning places with many dead corners such as toilets. Users often need to add detergent multiple times to ensure the cleaning effect. This repetitive operation is not only inefficient and increases the difficulty of cleaning, but may also lead to waste and uneven distribution of detergents. In addition, liquid detergents are at risk of leakage during storage and transportation, while powdered detergents are easily affected by moisture and agglomerate, affecting the use effect.

[0004] In order to solve the above problems, some solid cleaning products such as cleaning blocks or cleaning tablets have appeared on the market, which have simplified the use process to a certain extent, but still have problems such as slow dissolution and unsustainable cleaning effect. Therefore, developing a new type of cleaning brick to provide a long-lasting, efficient and convenient use experience has become an important research direction in the field of cleaning products.

[0005] Based on this, it is urgent to propose a technical solution to solve the above-mentioned problems. Summary of the invention

[0006] The invention discloses a cleaning brick, wherein the cleaning brick is obtained by first blending modified silicon dioxide with an alkoxy-containing nonionic surfactant, a zwitterionic surfactant and other components, then adding a water-soluble glue prepared from modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate for bonding, and finally wrapping with a packaging material and pressing into blocks. The invention first performs a hydroxylation treatment on silicon dioxide to enhance the activity of surface groups, and then reacts with dicarboxyl polyethylene glycol and alkyl acid, introduces hydrophilic and lipophilic segments into the modified silicon dioxide, has a certain surface activity, enhances the compatibility with other components, and makes the combination between components tighter, thereby enhancing the dispersibility and stability of the system; at the same time, the invention performs epichlorohydrin modification on polyvinyl alcohol to obtain a modified polyvinyl alcohol introduced with an ether group, which enhances its water resistance while retaining its viscosity. Since modified silica, alkoxy-containing nonionic surfactants, water-soluble glue, etc. have multiple active groups, the components can be entangled and connected with each other through molecular forces to form a tight and stable cross-linked structure, thereby enhancing the stability of the system and releasing the active ingredients evenly and slowly, extending the use time of the cleaning bricks and improving the cleaning effect.

[0007] One object of the present invention is to provide a cleaning brick, the cleaning brick comprising the following components in parts by mass:

[0008]

[0009]

[0010] in,

[0011] The modified silica is hydroxylated silica, which is partially grafted with dicarboxyl polyethylene glycol and partially grafted with alkyl acid;

[0012] The water-soluble glue is an aqueous solution of modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate;

[0013] The modified polyvinyl alcohol is epichlorohydrin modified polyvinyl alcohol.

[0014] Furthermore, the alkoxy-containing nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, fatty alcohol alkoxylate, fatty acid ethoxylate or alkylphenol polyoxyethylene ether.

[0015] Furthermore, the zwitterionic surfactant is selected from one or more of an amino acid type surfactant, an amine oxide type surfactant, a betaine type surfactant and an imidazoline type surfactant.

[0016] Furthermore, the enzyme is selected from one or more of protease, amylase, mannosidase or lipase.

[0017] Furthermore, the acid-base auxiliary agent is selected from one or more of sodium carbonate, sodium silicate, sodium tripolyphosphate, sodium citrate or ethylenediaminetetraacetic acid.

[0018] Furthermore, the packaging material is selected from one or more of cellulose water-soluble paper and polyvinyl alcohol water-soluble cloth.

[0019] Another object of the present invention is to provide a method for preparing the cleaning brick, comprising the following steps:

[0020] S1, mixing hydroxylated silica with dicarboxyl polyethylene glycol, and subjecting the mixture to ultrasonic heating reaction to obtain an intermediate; mixing the intermediate with an alkyl acid, and subjecting the mixture to ultrasonic heating reaction to obtain modified silica;

[0021] S2, mixing polyvinyl alcohol and epichlorohydrin, adding a catalyst to react, and obtaining modified polyvinyl alcohol;

[0022] S3, blending the modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate to prepare an aqueous solution to obtain a water-soluble glue;

[0023] S4, blending the alkoxy-containing nonionic surfactant, the zwitterionic surfactant, the modified silica, the enzyme, the acid-base auxiliary agent and the flavor, and then bonding them together with the water-soluble glue to obtain an intermediate product;

[0024] S5. Wrap the intermediate product with a packaging material and press it into a block to obtain a clean brick.

[0025] Furthermore, in step S1, the mass ratio of the hydroxylated silica, dicarboxyl polyethylene glycol and alkyl acid is 1:(1-3):(1-5).

[0026] Furthermore, in step S1, the heating temperature is 60-80°C.

[0027] Furthermore, the molar ratio of the polyvinyl alcohol to epichlorohydrin is 1:(0.2-0.7).

[0028] Furthermore, in step S3, the concentration of the aqueous solution is 20-40wt%.

[0029] The present invention has the following beneficial effects:

[0030] (1) The present invention first performs a hydroxylation treatment on silica to enhance the activity of the surface groups, and then reacts with dicarboxyl polyethylene glycol and alkyl acid to introduce hydrophilic and lipophilic segments into the modified silica, which has a certain surface activity, enhances the compatibility with other components, and makes the combination between the components more compact, thereby enhancing the dispersibility and stability of the system; at the same time, the present invention performs epichlorohydrin modification on polyvinyl alcohol to obtain a modified polyvinyl alcohol with an ether group introduced, which enhances its water resistance while retaining its viscosity. Since the modified silica, alkoxy-containing nonionic surfactants, water-soluble glue, etc. have multiple active groups, the components can be entangled and connected with each other through molecular forces to form a tight and stable cross-linked structure, thereby enhancing the stability of the system, thereby evenly and slowly releasing the active ingredients, extending the use time of the cleaning bricks, and improving the cleaning effect.

[0031] (2) The modified silica of the present invention can rub against hard surfaces. When applied to hard surfaces such as toilets, it can effectively remove solid dirt on the surface and enhance the cleaning effect of the cleaning brick. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0033] Unless otherwise stated, the raw materials, reactions and post-treatment methods mentioned in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0034] The following abbreviations are used in the embodiments and comparative examples of the present invention and have the functions indicated.

[0035] AEO-9: Ethoxylated fatty alcohol, average degree of ethoxylation 9, containing alkoxy nonionic surfactant.

[0036] Dodecylethoxysulfobetaine, a zwitterionic surfactant.

[0037] Protease: Alkaline protease, brand Savinase Ultra 16XL, purchased from Novozymes.

[0038] The polyvinyl alcohol brand is P434371, purchased from Shanghai Aladdin.

[0039] The polyvinyl acetate was purchased from Shanghai Macklin with the brand number of P823279.

[0040] Water-based acrylates: Hydroxyethyl acrylate.

[0041] The preparation method of hydroxylated silicon dioxide in the embodiments of the present invention and the comparative examples comprises the following steps:

[0042] The silicon dioxide was immersed in a mixed solution of concentrated sulfuric acid and hydrogen peroxide (concentrated sulfuric acid: hydrogen peroxide = 7:3, m / m, the concentration of the hydrogen peroxide was 30wt%), reacted at 80°C for 1h, and the unreacted concentrated sulfuric acid and hydrogen peroxide were washed away to obtain hydroxylated silicon dioxide.

[0043] The preparation method of dicarboxyl polyethylene glycol in the embodiments of the present invention and the comparative examples comprises the following steps:

[0044] Polyethylene glycol, dianhydride, 4-dimethylaminopyridine and triethylamine (polyethylene glycol: dianhydride: 4-dimethylaminopyridine: triethylamine = 1:5:3:3, n / n / n / n) were dissolved in 50 mL of dichloromethane, reacted at room temperature for 20 h under argon atmosphere protection, purified, filtered and dried to obtain dicarboxy polyethylene glycol.

[0045] Example 1

[0046] A cleaning brick, comprising the following components in parts by weight:

[0047]

[0048] The preparation method of the cleaning brick comprises the following steps:

[0049] S1. Using ethanol as solvent, blending hydroxylated silica and dicarboxyl polyethylene glycol, reacting them by ultrasonication at 70°C for 10 hours, then filtering, washing and drying to obtain an intermediate; blending the intermediate with butyric acid (hydroxylated silica: dicarboxyl polyethylene glycol: butyric acid = 1:3:5, m / m / m), reacting them by ultrasonication at 70°C for 10 hours, then filtering, washing and drying to obtain modified silica;

[0050] S2, using dimethyl sulfoxide as a solvent, polyvinyl alcohol and epichlorohydrin (polyvinyl alcohol: epichlorohydrin = 1:0.5, n / n) were mixed, and a 10wt% sodium hydroxide solution (50% by weight of polyvinyl alcohol) was added, and the mixture was reacted for 5h to obtain modified polyvinyl alcohol;

[0051] S3, blending the modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate (modified polyvinyl alcohol: polyvinyl acetate: water-based acrylate = 7:1:0.2, m / m / m) to prepare an aqueous solution with a concentration of 30 wt % to obtain a water-soluble glue;

[0052] S4. Blend AEO-9, dodecylethoxysulfobetaine, the modified silica, protease, ethylenediaminetetraacetic acid and flavor according to the above mass fractions, then add the water-soluble glue, stir evenly, and dry to obtain an intermediate product;

[0053] S5. Wrap the intermediate product with cellulose water-soluble paper and press it into blocks to obtain clean bricks.

[0054] Example 2

[0055] A cleaning brick, comprising the following components in parts by weight:

[0056]

[0057] The preparation method of the cleaning brick is the same as that of Example 1.

[0058] Example 3

[0059] A cleaning brick, comprising the following components in parts by weight:

[0060]

[0061] The preparation method of the cleaning brick is the same as that of Example 1.

[0062] Comparative Example 1

[0063] A cleaning brick. The difference between this comparative example and Example 1 is that step S2 is omitted, and in step S3, the modified polyvinyl alcohol is replaced with commercially available polyvinyl alcohol. Other ingredients and preparation methods are the same as those in Example 1.

[0064] Comparative Example 2

[0065] A cleaning brick. The difference between this comparative example and Example 1 is that in step S4, the modified silicon dioxide and other qualities are replaced by an intermediate, and the other ingredients and preparation methods are the same as those in Example 1.

[0066] Comparative Example 3

[0067] A cleaning brick. The difference between this comparative example and Example 1 is that in step S1, the reaction of hydroxylated silica and dicarboxyl polyethylene glycol is not carried out, and the intermediate is replaced by hydroxylated silica and butyric acid for reaction. Other components and preparation methods are the same as those in Example 1.

[0068] Test Case

[0069] (1) The decontamination rate of Examples 1-3 and Comparative Examples 1-3 was tested.

[0070] Test method: Take a 15cm×15cm tile, measure its weight, record it as W1; apply a layer of about 50g of dirt on the tile, bake it at 232℃ for 1h, measure its weight, record it as W2; put the tile in a proper amount of water, then add 5g of cleaning bricks, leave it at room temperature for 2h, then rinse it with a sponge under 60℃ hot water flow, dry it in an oven, measure its weight, record it as W3. Calculate the decontamination rate by weight method.

[0071] The dirt consists of 50wt% chicken fat, 20wt% vegetable oil, 20wt% flour, 5wt% tomato paste, and 5wt% granulated sugar.

[0072] Decontamination rate = [(W2-W3) / (W2-W1)]×100%.

[0073] (2) Durability tests were performed on Examples 1-3 and Comparative Examples 1-3.

[0074] A stainless steel cylindrical mesh cage (40 mm in diameter, 60 mm in height) containing a cleaning brick (about 30 g) was immersed in a 15 L static water tank (water temperature 25°C), and the weight of the cleaning brick was measured every 5 days. The number of days required for the weight of the cleaning brick to decrease to less than 5 g was used as the durability result. The water tank was replaced with new water every day.

[0075] The test results are shown in Table 1.

[0076] Table 1 Decontamination rate and durability test results

[0077] project Decontamination rate / % Durability / day Example 1 99.3 30 Example 2 98.8 28 Example 3 99.1 28 Comparative Example 1 88.5 20 Comparative Example 2 87.7 21 Comparative Example 3 87.5 20

[0078] It can be seen from the above test results that the cleaning brick of the embodiment of the present invention has a significantly better decontamination rate than that of comparative examples 1-3, and has good decontamination effect and durability; while comparative examples 1-3 respectively replace the modified components with unmodified components or partially modified components, and the intermolecular interaction force is weak, making it difficult to form a tight and stable cross-linked structure, and therefore the decontamination ability and durability are poor.

[0079] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0080] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cleaning brick, characterized in that: The cleaning brick comprises the following components in parts by mass: in, The modified silica is hydroxylated silica, which is partially grafted with dicarboxyl polyethylene glycol and partially grafted with alkyl acid; The water-soluble glue is an aqueous solution of modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate; The modified polyvinyl alcohol is epichlorohydrin modified polyvinyl alcohol.

2. The cleaning brick according to claim 1, characterized in that: The alkoxy-containing nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, fatty alcohol alkoxylate, fatty acid ethoxylate or alkylphenol polyoxyethylene ether.

3. The cleaning brick according to claim 1, characterized in that: The zwitterionic surfactant is selected from one or more of an amino acid type surfactant, an amine oxide type surfactant, a betaine type surfactant and an imidazoline type surfactant.

4. The cleaning brick according to claim 1, characterized in that: The acid-base auxiliary agent is selected from one or more of sodium carbonate, sodium silicate, sodium tripolyphosphate, sodium citrate or ethylenediaminetetraacetic acid.

5. The cleaning brick according to claim 1, characterized in that: The packaging material is selected from one or more of cellulose water-soluble paper and polyvinyl alcohol water-soluble cloth.

6. The method for preparing the cleaning brick according to any one of claims 1 to 5, characterized in that: The steps include: S1, mixing hydroxylated silica with dicarboxyl polyethylene glycol, and subjecting the mixture to ultrasonic heating reaction to obtain an intermediate; mixing the intermediate with an alkyl acid, and subjecting the mixture to ultrasonic heating reaction to obtain modified silica; S2, mixing polyvinyl alcohol and epichlorohydrin, adding a catalyst to react, and obtaining modified polyvinyl alcohol; S3, blending the modified polyvinyl alcohol, polyvinyl acetate and water-based acrylate to prepare an aqueous solution to obtain a water-soluble glue; S4, blending the alkoxy-containing nonionic surfactant, the zwitterionic surfactant, the modified silica, the enzyme, the acid-base auxiliary agent and the flavor, and then bonding them together with the water-soluble glue to obtain an intermediate product; S5. Wrap the intermediate product with a packaging material and press it into a block to obtain a clean brick.

7. The method for preparing the cleaning brick according to claim 6, characterized in that: In step S1, the mass ratio of the hydroxylated silica, dicarboxyl polyethylene glycol and alkyl acid is 1:(1-3):(1-5).

8. The method for preparing the cleaning brick according to claim 6, characterized in that: In step S1, the heating temperature is 60-80°C.

9. The method for preparing the cleaning brick according to claim 6, characterized in that: In step S2, the molar ratio of polyvinyl alcohol to epichlorohydrin is 1:(0.2-0.7).

10. The method for preparing the cleaning brick according to claim 6, characterized in that: In step S3, the concentration of the aqueous solution is 20-40 wt%.

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